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It includes <a href="/wiki/Meteorology" title="Meteorology">scientific</a> as well as selected informal terminology. </p> <style data-mw-deduplicate="TemplateStyles:r1111373058">.mw-parser-output .toc-top-false-title{font-weight:bold;text-align:center}.mw-parser-output .toc-top .hlist ul{text-align:inherit}@media all and (min-width:720px){.mw-parser-output .toc-top{clear:left}.mw-parser-output .toc-top-left{float:left}.mw-parser-output .toc-top-right{float:right;clear:right}.mw-parser-output .toc-top-center{margin:auto;clear:none}}body.skin-vector-2022 .mw-parser-output .toc-top{padding:7px}body.skin-vector-2022 .mw-parser-output .toc-top #toc-title-text{border-bottom:0;margin-top:0;font-weight:bold;text-align:center}</style><div class="toc plainlinks toc-top" role="navigation" aria-labelledby="toc-title-text-template" id="toc"> <div class="toctitle"><h2 id="Contents" id="toc-title-text">Contents </h2></div> <style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><div class="hlist"> <ul><li><a href="#0–9">0–9</a></li> <li><a href="#A">A</a> <a href="#B">B</a> <a href="#C">C</a> <a href="#D">D</a> <a href="#E">E</a> <a href="#F">F</a> <a href="#G">G</a> <a href="#H">H</a> <a href="#I">I</a> <a href="#J">J</a> <a href="#K">K</a> <a href="#L">L</a> <a href="#M">M</a> <a href="#N">N</a> <a href="#O">O</a> <a href="#P">P</a> <a href="#Q">Q</a> <a href="#R">R</a> <a href="#S">S</a> <a href="#T">T</a> <a href="#U">U</a> <a href="#V">V</a> <a href="#W">W</a> <a href="#X">X</a> <a href="#Y">Y</a> <a href="#Z">Z</a></li> <li><a href="#content">Top</a></li> <li><a href="#See_also">See also</a></li> <li><a href="#References">References</a></li> <li><a href="#External_links">External links</a></li></ul> </div></div> <div class="mw-heading mw-heading2"><h2 id="A">A</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=1" title="Edit section: A"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Advanced_Radar_Research_Center" title="Advanced Radar Research Center">Advanced Radar Research Center</a></i> (<b>ARRC</b>)</li> <li><i><a href="/wiki/Advection" title="Advection">Advection</a></i></li> <li><i><a href="/wiki/Air_parcel" class="mw-redirect" title="Air parcel">Air parcel</a></i></li> <li><i><a href="/wiki/American_Geophysical_Union" title="American Geophysical Union">American Geophysical Union</a></i> (<b>AGU</b>)</li> <li><i><a href="/wiki/American_Meteorological_Society" title="American Meteorological Society">American Meteorological Society</a></i> (<b>AMS</b>)</li> <li><i>Anticipated convection</i> (<b>AC</b>) – A convective outlook.</li> <li><i><a href="/wiki/Angular_momentum" title="Angular momentum">Angular momentum</a></i></li> <li><i><a href="/wiki/Anticyclone" title="Anticyclone">Anticyclone</a></i></li> <li><i><a href="/wiki/Anticyclonic_rotation" title="Anticyclonic rotation">Anticyclonic rotation</a></i></li> <li><i><a href="/wiki/Anticyclonic_tornado" title="Anticyclonic tornado">Anticyclonic tornado</a></i></li> <li><i><a href="/wiki/Anticyclogenesis" title="Anticyclogenesis">Anticyclogenesis</a></i></li> <li><i><a href="/wiki/Arcus_cloud" title="Arcus cloud">Arcus cloud</a></i></li> <li><i><a href="/wiki/Atmospheric_pressure" title="Atmospheric pressure">Atmospheric pressure</a></i></li></ul> </div> <p>Atmosphere </p> <div class="mw-heading mw-heading2"><h2 id="B">B</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=2" title="Edit section: B"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Baroclinity" title="Baroclinity">Baroclinity</a></i> or <i>baroclinicity</i> – baroclinic</li> <li><i><a href="/wiki/Barotropic_flow" class="mw-redirect" title="Barotropic flow">Barotropity</a>'</i> or <i>barotropicity</i> – barotropic</li> <li><b>Bear's cage</b> – (tornado chaser slang) The precipitation that wraps around a mesocyclone, possibly hiding a tornado on the ground.</li> <li><i><a href="/wiki/Beaufort_scale" title="Beaufort scale">Beaufort scale</a></i></li> <li><i><a href="/wiki/Bernoulli%27s_principle" title="Bernoulli's principle">Bernoulli's principle</a></i></li> <li><b>Blob</b> – Informal term coined by <a href="/wiki/Erik_N._Rasmussen" title="Erik N. Rasmussen">Erik N. Rasmussen</a> for a <a href="/wiki/Descending_reflectivity_core" title="Descending reflectivity core">descending reflectivity core</a> (DRC).</li> <li><b>Boundary</b></li> <li><i><a href="/wiki/Bounded_weak_echo_region" title="Bounded weak echo region">Bounded weak echo region</a></i> (<b>BWER</b>)</li> <li><i><a href="/wiki/Bow_echo" title="Bow echo">Bow echo</a></i></li> <li><b>BRN shear</b></li> <li><i><a href="/wiki/Bulk_Richardson_Number" class="mw-redirect" title="Bulk Richardson Number">Bulk Richardson Number</a></i> (<b>BRN</b>)</li> <li><b>Bulk shear</b></li> <li><i><a href="/wiki/Buoyancy" title="Buoyancy">Buoyancy</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="C">C</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=3" title="Edit section: C"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Capping_inversion" title="Capping inversion">Capping inversion</a></i> (<b>cap</b>)</li> <li><i><a href="/wiki/Center_for_Analysis_and_Prediction_of_Storms" title="Center for Analysis and Prediction of Storms">Center for Analysis and Prediction of Storms</a></i> (<b>CAPS</b>)</li> <li><b>Center for Severe Weather Research</b> (<b>CSWR</b>)</li> <li><b>Chaser convention</b> – Originally it referred to serendipitous meeting of chasers in the field akin to "chaser convergence", but now it mostly refers to the <a rel="nofollow" class="external text" href="http://www.chasercon.com/">National Storm Chasers Convention</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130622135021/http://www.chasercon.com/">Archived</a> 2013-06-22 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> held annually in the Denver, Colorado area.</li> <li><b>Cloud tag</b></li> <li><b>Cluster outbreak</b></li> <li><b>Cold air funnel</b> – (colloquialism)</li> <li><i><a href="/wiki/Cold_front" title="Cold front">Cold front</a></i></li> <li><b>Collar cloud</b></li> <li><i><a href="/wiki/Colorado_low" title="Colorado low">Colorado low</a></i></li> <li><b>Cool air advection</b> (<b>CAA</b>)</li> <li><b>Condensation funnel</b> – The area of a funnel cloud or tornado where <a href="/wiki/Cloud" title="Cloud">cloud</a> has condensed. This is not the same thing as a tornado, which is a vortex of wind.</li> <li><b>Confluence</b></li> <li><i><a href="/wiki/Cooperative_Institute_for_Mesoscale_Meteorological_Studies" class="mw-redirect" title="Cooperative Institute for Mesoscale Meteorological Studies">Cooperative Institute for Mesoscale Meteorological Studies</a></i> (<b>CIMMS</b>) –</li> <li><i><a href="/wiki/Cooperative_Institute_for_Meteorological_Satellite_Studies" title="Cooperative Institute for Meteorological Satellite Studies">Cooperative Institute for Meteorological Satellite Studies</a></i> (<b>CIMSS</b>)</li> <li><i><a href="/wiki/Cooperative_Institute_for_Precipitation_Systems" title="Cooperative Institute for Precipitation Systems">Cooperative Institute for Precipitation Systems</a></i> (<b>CIPS</b>)</li> <li><i><a href="/wiki/Cooperative_Institute_for_Research_in_the_Atmosphere" title="Cooperative Institute for Research in the Atmosphere">Cooperative Institute for Research in the Atmosphere</a></i> (<b>CIRA</b>)</li> <li><i><a href="/wiki/Atmospheric_convection" title="Atmospheric convection">Convection</a></i></li> <li><i><a href="/wiki/Convective_available_potential_energy" title="Convective available potential energy">Convective available potential energy</a></i> (<b>CAPE</b>)</li> <li><i><a href="/wiki/Convective_condensation_level" title="Convective condensation level">Convective condensation level</a></i> (<b>CCL</b>)</li> <li><i><a href="/wiki/Convective_inhibition" title="Convective inhibition">Convective inhibition</a></i> (<b>CIN</b> or <b>CINh</b>)</li> <li><i><a href="/wiki/Convective_instability" title="Convective instability">Convective instability</a></i></li> <li><i><a href="/wiki/Convective_outlook" class="mw-redirect" title="Convective outlook">Convective outlook</a></i></li> <li><b>Convective storm</b></li> <li><i><a href="/wiki/Convective_storm_detection" title="Convective storm detection">Convective storm detection</a></i></li> <li><i><a href="/w/index.php?title=Convective_storm_prediction&action=edit&redlink=1" class="new" title="Convective storm prediction (page does not exist)">Convective storm prediction</a></i></li> <li><i><a href="/wiki/Convective_temperature" title="Convective temperature">Convective temperature</a></i> (<b>CT</b> or <b>T<sub>c</sub></b>)</li> <li><i><a href="/wiki/Divergence" title="Divergence">Convergence</a></i></li> <li><b>Core</b></li> <li><b>Core flow region</b></li> <li><b>Core punching</b> (or <b>punching the core</b>)</li> <li><b>Corridor outbreak</b></li> <li><i><a href="/wiki/Cumulonimbus_cloud" title="Cumulonimbus cloud">Cumulonimbus cloud</a></i> (<b>Cb</b>)</li> <li><b>Cycloidal marks</b></li> <li><i><a href="/wiki/Cyclonic_rotation" title="Cyclonic rotation">Cyclonic rotation</a></i></li> <li><i><a href="/wiki/Cyclogenesis" title="Cyclogenesis">Cyclogenesis</a></i></li> <li><i><a href="/wiki/Cyclone" title="Cyclone">Cyclone</a></i> An area of cyclonic low pressure, from the scale of an extratropical or tropical cyclone to mesolow to a mesocyclone to a tornadocyclone or even to a tornado. – (slang) Historically, used in the US to a tornado.</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="D">D</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=4" title="Edit section: D"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Damage survey</b></li> <li><b>DAPPL database</b> – Short for <b>Damage Area Per Path Length</b>, this is one of three US tornado databases and was maintained by <a href="/wiki/Ted_Fujita" title="Ted Fujita">Ted Fujita</a> at the <a href="/wiki/University_of_Chicago" title="University of Chicago">University of Chicago</a> including tornadoes from 1916 to 1992.</li> <li><i><a href="/wiki/Tornado_debris_signature" title="Tornado debris signature">Debris cloud</a></i></li> <li><b>Deepening low</b></li> <li><b>Deep convection</b></li> <li><b>Deep shear</b></li> <li><b>Denver Convergence Vorticity Zone</b> (<i>DCVZ</i>)</li> <li><i><a href="/wiki/Derecho" title="Derecho">Derecho</a></i></li> <li><i><a href="/wiki/Descending_reflectivity_core" title="Descending reflectivity core">Descending reflectivity core</a></i> (<i>DRC</i>)</li> <li><i><a href="/wiki/Dew_point" title="Dew point">Dew point</a></i> (<i>T<sub>d</sub></i>)</li> <li><i><a href="/wiki/Dew_point_depression" title="Dew point depression">Dew point depression</a></i></li> <li><b>Dewpoint surge line</b></li> <li><i><a href="/wiki/Deformation_(meteorology)" title="Deformation (meteorology)">Diffluence</a></i> – A pattern of wind flow in which air moves outward (in a "fan-out" pattern) away from a central axis that is oriented parallel to the general direction of the flow. It is the opposite of confluence.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li> <li><b>Digging low</b> or <b>digging wave</b></li> <li><b>Direct hit</b></li> <li><b>Directional shear</b></li> <li><i><a href="/wiki/Divergence" title="Divergence">Divergence</a></i></li> <li><i><a href="/wiki/Doppler_on_Wheels" title="Doppler on Wheels">Doppler on Wheels</a></i> (<i>DOW</i>)</li> <li><i><a href="/wiki/Doppler_weather_radar" class="mw-redirect" title="Doppler weather radar">Doppler weather radar</a></i></li> <li><b>Dry convection</b> (or <b>dry mixing</b>) – A vertical exchange of air without precipitation at the ground.</li> <li><i><a href="/wiki/Dry_line" title="Dry line">Dry line</a></i> (<i>DL</i>)</li> <li><b>Dryline bulge</b></li> <li><i><a href="/wiki/Dry_punch" class="mw-redirect" title="Dry punch">Dry punch</a></i></li> <li><i><a href="/wiki/Dry_thunderstorm" title="Dry thunderstorm">Dry thunderstorm</a></i></li> <li><i><a href="/wiki/Dust_devil" title="Dust devil">Dust devil</a></i></li> <li><i><a href="/wiki/Downburst" title="Downburst">Downburst</a></i></li> <li><i><a href="/wiki/Downdraft" class="mw-redirect" title="Downdraft">Downdraft</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="E">E</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=5" title="Edit section: E"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Earth_System_Research_Laboratories" title="Earth System Research Laboratories">Earth System Research Laboratories</a></i> (<b>ESRL</b>)</li> <li><i><a href="/wiki/Eddy_(fluid_dynamics)" title="Eddy (fluid dynamics)">Eddy</a></i></li> <li><b>Elevated mixed layer</b> (<b>EML</b>)</li> <li><i><a href="/wiki/Hydrodynamical_helicity#Meteorology" title="Hydrodynamical helicity">Energy-helicity index</a></i> (<i>EHI</i>)</li> <li><b>Energy scale</b> (<b>E scale</b>) – Wind speed scales proposed by <a href="/w/index.php?title=Nikolai_Dotzek&action=edit&redlink=1" class="new" title="Nikolai Dotzek (page does not exist)">Nikolai Dotzek</a> for application to <a href="/wiki/Tornado" title="Tornado">tornadoes</a>, <a href="/wiki/Downburst" title="Downburst">downbursts</a>, <a href="/wiki/Tropical_cyclone" title="Tropical cyclone">tropical cyclones</a>, other storms and wind in general.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li><i><a href="/wiki/Enhanced_Fujita_scale" title="Enhanced Fujita scale">Enhanced Fujita scale</a></i> (<i>EF scale</i>)</li> <li><b>Enhanced wording</b></li> <li><i><a href="/wiki/Entrainment_(meteorology)" title="Entrainment (meteorology)">Entrainment</a></i></li> <li><i><a href="/wiki/Environment_and_Climate_Change_Canada" title="Environment and Climate Change Canada">Environment and Climate Change Canada</a></i></li> <li><i><a href="/wiki/Environmental_Modeling_Center" title="Environmental Modeling Center">Environmental Modeling Center</a></i> (<b>EMC</b>)</li> <li><b>Environmental Research Laboratories</b> (<b>ERL</b>)</li> <li><i><a href="/wiki/Environmental_Science_Services_Administration" title="Environmental Science Services Administration">Environmental Science Services Administration</a></i> (<b>ESSA</b>) – The predecessor agency (1965-1970) to <a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">NOAA</a> (1970-present).</li> <li><i><a href="/wiki/Equivalent_potential_temperature" title="Equivalent potential temperature">Equivalent potential temperature</a></i> (<b>theta-e</b>)</li> <li><i><a href="/wiki/Extratropical_cyclone" title="Extratropical cyclone">Extratropical cyclone</a></i></li> <li><i><a href="/wiki/Eye_(cyclone)" title="Eye (cyclone)">Eye of a tropical cyclone</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="F">F</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=6" title="Edit section: F"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Filling low</b></li> <li><i><a href="/wiki/Fire_whirl" title="Fire whirl">Fire whirl</a></i></li> <li><i><a href="/w/index.php?title=Forecast_Decision_Training_Branch&action=edit&redlink=1" class="new" title="Forecast Decision Training Branch (page does not exist)">Forecast Decision Training Branch</a></i> (<i>FDTB</i>)</li> <li><b>Forecast Systems Laboratory</b> (<i>FSL</i>)</li> <li><i><a href="/wiki/Forward-flank_downdraft" class="mw-redirect" title="Forward-flank downdraft">Forward-flank downdraft</a></i> (or <i>front-flank downdraft</i>) (<i>FFD</i>)</li> <li><i><a href="/wiki/Fractus_cloud" title="Fractus cloud">Fractus cloud</a></i> (<b>Fr</b>)</li> <li><i><a href="/wiki/Weather_front" title="Weather front">Front</a></i></li> <li><i><a href="/wiki/Frontogenesis" title="Frontogenesis">Frontogenesis</a></i></li> <li><i><a href="/wiki/Fujita_scale" title="Fujita scale">Fujita scale</a></i> (<i>F scale</i>)</li> <li><i><a href="/wiki/Funnel_cloud" title="Funnel cloud">Funnel cloud</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="G">G</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=7" title="Edit section: G"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Gate-to-gate shear</b></li> <li><i>GMT</i> (<i><a href="/wiki/Greenwich_Mean_Time" title="Greenwich Mean Time">Greenwich Mean Time</a></i>)</li> <li><i><a href="/wiki/Ground_truth" title="Ground truth">Ground truth</a></i></li> <li><i><a href="/wiki/Gust_front" class="mw-redirect" title="Gust front">Gust front</a></i></li> <li><i><a href="/wiki/Gustnado" title="Gustnado">Gustnado</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="H">H</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=8" title="Edit section: H"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Handoff</b> – (slang)</li> <li><i><a href="/wiki/Helicity_(fluid_mechanics)" class="mw-redirect" title="Helicity (fluid mechanics)">Helicity</a></i></li> <li><b>High-precipitation supercell</b> (<b>HP</b>)</li> <li><i><a href="/wiki/High-pressure_area" title="High-pressure area">High-pressure area</a></i> (<i>H</i>)</li> <li><b>High risk</b> (<b>HIGH</b>)</li> <li><i><a href="/wiki/Hook_echo" title="Hook echo">Hook echo</a></i></li> <li><i><a href="/wiki/Horseshoe_vortex" title="Horseshoe vortex">Horseshoe vortex</a></i></li> <li><i><a href="/wiki/Tropical_cyclone" title="Tropical cyclone">Hurricane</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="I">I</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=9" title="Edit section: I"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/In_situ" title="In situ">In situ</a></i></li> <li><i><a href="/wiki/Inflow_(meteorology)" title="Inflow (meteorology)">Inflow</a></i></li> <li><b>Inflow jet</b></li> <li><b>Inflow notch</b></li> <li><b>Instability</b></li> <li><b>Intense tornado</b> – A tornado rated F3-F5 or EF3-EF5.</li> <li><b>Institute for Disaster Research</b> (<b>IDR</b>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="J">J</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=10" title="Edit section: J"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Jet max</b> (or <b>jet maximum</b>)</li> <li><b>Jet streak</b></li> <li><i><a href="/wiki/Jet_stream" title="Jet stream">Jet stream</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="K">K</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=11" title="Edit section: K"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Kinematics" title="Kinematics">Kinematics</a></i></li> <li><i><a href="/wiki/K-index" title="K-index">K-index</a></i></li> <li><i><a href="/wiki/Kelvin%E2%80%93Helmholtz_instability" title="Kelvin–Helmholtz instability">Kelvin–Helmholtz instability</a></i> (<i>KH waves</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="L">L</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=12" title="Edit section: L"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Landspout" title="Landspout">Landspout</a></i></li> <li><i><a href="/wiki/Lapse_rate" title="Lapse rate">Lapse rate</a></i></li> <li><i><a href="/wiki/Trough_(meteorology)#Lee_trough" title="Trough (meteorology)">Lee trough</a></i></li> <li><i><a href="/wiki/Lemon_technique" title="Lemon technique">Lemon technique</a></i></li> <li><i><a href="/wiki/Level_of_free_convection" title="Level of free convection">Level of free convection</a></i> (<i>LFC</i>)</li> <li><i><a href="/wiki/Lifted_condensation_level" class="mw-redirect" title="Lifted condensation level">Lifted condensation level</a></i> (<i>LCL</i>)</li> <li><i><a href="/wiki/Lifted_index" title="Lifted index">Lifted index</a></i> (<i>LI</i>)</li> <li><b>Lifting mechanism</b> (<i>lift</i>)</li> <li><i><a href="/wiki/Lightning" title="Lightning">Lightning</a></i> (<i>LTG</i>)</li> <li><i><a href="/wiki/Line_echo_wave_pattern" title="Line echo wave pattern">Line echo wave pattern</a></i> (<i>LEWP</i>)</li> <li><b>Long track tornado</b> (<i>LT</i>)</li> <li><b>Low-precipitation supercell</b> (<i>LP</i>)</li> <li><i><a href="/wiki/Low-pressure_area" title="Low-pressure area">Low-pressure area</a></i> (<i>L</i>)</li> <li><i><a href="/wiki/Low-topped_supercell" class="mw-redirect" title="Low-topped supercell">Low-topped supercell</a></i> (<i>LT</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="M">M</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=13" title="Edit section: M"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Maxitornado</b></li> <li><b>Megasupercell</b></li> <li><b>Mesoanticyclone</b> – An anticyclonic mesocyclone</li> <li><i><a href="/wiki/Mesoscale_meteorology" title="Mesoscale meteorology">Mesoscale meteorology</a></i></li> <li><i><a href="/wiki/Mesocyclone" title="Mesocyclone">Mesocyclone</a></i></li> <li><i><a href="/wiki/Mesohigh" title="Mesohigh">Mesohigh</a></i></li> <li><i><a href="/wiki/Mesolow" class="mw-redirect" title="Mesolow">Mesolow</a></i></li> <li><i><a href="/wiki/Mesonet" title="Mesonet">Mesonet</a></i></li> <li><i><a href="/wiki/Mesoscale_convective_complex" title="Mesoscale convective complex">Mesoscale convective complex</a></i> (<i>MCC</i>)</li> <li><i><a href="/wiki/Mesoscale_convective_discussion" class="mw-redirect" title="Mesoscale convective discussion">Mesoscale convective discussion</a></i> (<i>MCD</i>)</li> <li><i><a href="/wiki/Mesoscale_convective_system" title="Mesoscale convective system">Mesoscale convective system</a></i> (<i>MCS</i>)</li> <li><i><a href="/wiki/Mesoscale_convective_vortex" class="mw-redirect" title="Mesoscale convective vortex">Mesoscale convective vortex</a></i> (<i>MCV</i>)</li> <li><i><a href="/wiki/Mesoscale_meteorology" title="Mesoscale meteorology">Mesoscale meteorology</a></i></li> <li><i><a href="/wiki/Mesovortices" class="mw-redirect" title="Mesovortices">Mesovortices</a></i></li> <li><i><a href="/wiki/Metadata" title="Metadata">Metadata</a></i></li> <li><i><a href="/wiki/METAR" title="METAR">METAR</a></i></li> <li><i><a href="/wiki/Microburst" class="mw-redirect" title="Microburst">Microburst</a></i></li> <li><b>Micronet</b> – A weather observation network even denser than a mesonet, such as the Oklahoma City Micronet.</li> <li><i><a href="/wiki/Microscale_meteorology" title="Microscale meteorology">Microscale meteorology</a></i></li> <li><b>Mini-supercell</b> – A distinct kind of supercell that is smaller than a typical supercell. See <b>low topped supercell</b>.</li> <li><b>Mini-tornado</b> – A fallacious term often used in European news media to refer to tornadoes occurring there; even large, strong, and/or long track tornadoes produced by supercells. This is apparently due to the erroneous perception that "real" tornadoes do not occur in Europe (or elsewhere where the term is applied).</li> <li><i><a href="/wiki/Misocyclone" class="mw-redirect" title="Misocyclone">Misocyclone</a></i></li> <li><i><a href="/wiki/Misoscale_meteorology" title="Misoscale meteorology">Misoscale meteorology</a></i> –</li> <li><b>Mixed air</b> and <b>mixed layer</b></li> <li><i><a href="/wiki/Mixing_ratio" title="Mixing ratio">Mixing ratio</a></i></li> <li><b>Moderate risk</b> (<b>MDT</b>)</li> <li><b>Modified Fujita scale</b> (<b>f scale</b>) – A proposed update in 1992 by <a href="/wiki/Ted_Fujita" title="Ted Fujita">Ted Fujita</a> to his original <a href="/wiki/Fujita_scale" title="Fujita scale">Fujita scale</a> from 1971</li> <li><i><a href="/wiki/Moisture" title="Moisture">Moisture</a></i></li> <li><b>Moisture convergence</b> (<b>mcon</b>)</li> <li><i><a href="/wiki/Multicellular_thunderstorm" title="Multicellular thunderstorm">Multicellular thunderstorm</a></i></li> <li><i><a href="/wiki/Multiple-vortex_tornado" title="Multiple-vortex tornado">Multiple-vortex tornado</a></i></li> <li><b>Multivortex mesocyclone</b> (<b>MVMC</b>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="N">N</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=14" title="Edit section: N"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/National_Center_for_Atmospheric_Research" title="National Center for Atmospheric Research">National Center for Atmospheric Research</a></i> (<i>NCAR</i>)</li> <li><i><a href="/wiki/National_Centers_for_Environmental_Prediction" title="National Centers for Environmental Prediction">National Centers for Environmental Prediction</a></i> (<i>NCEP</i>)</li> <li><i><a href="/wiki/National_Hurricane_Center" title="National Hurricane Center">National Hurricane Center</a></i> (<i>NHC</i>)</li> <li><b>National Meteorological Center</b> (<i>NMC</i>) – The predecessor to NCEP.</li> <li><i><a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">National Oceanic and Atmospheric Administration</a></i> (<i>NOAA</i>)</li> <li><i><a href="/wiki/National_Science_Foundation" title="National Science Foundation">National Science Foundation</a></i> (<i>NSF</i>)</li> <li><i><a href="/wiki/National_Severe_Storms_Forecast_Center" class="mw-redirect" title="National Severe Storms Forecast Center">National Severe Storms Forecast Center</a></i> (<i>NSSFC</i>) – A predecessor forecasting center to <i>SPC</i> that was located in Kansas City, Missouri.</li> <li><i><a href="/wiki/National_Severe_Storms_Laboratory" title="National Severe Storms Laboratory">National Severe Storms Laboratory</a></i> (<i>NSSL</i>) – A NOAA lab in Norman, Oklahoma tasked with researching severe weather.</li> <li><b>National Tornado Database</b> – The official NOAA record of all known tornadoes within the US from 1950 to present.</li> <li><i><a href="/wiki/National_Weather_Center" title="National Weather Center">National Weather Center</a></i> (<i>NWC</i>)</li> <li><i><a href="/wiki/National_Weather_Service" title="National Weather Service">National Weather Service</a></i> (<i>NWS</i>)</li> <li><i><a href="/wiki/National_Weather_Service_Training_Center" title="National Weather Service Training Center">National Weather Service Training Center</a></i> (<i>NWSTC</i>)</li> <li><b>National Wind Institute</b> (<i>NWI</i>)</li> <li><b>Negative area</b></li> <li><i><a href="/wiki/Trough_(meteorology)#Positively/negatively_tilted" title="Trough (meteorology)">Negatively tilted</a></i> (or <i>negative tilt</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="O">O</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=15" title="Edit section: O"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Occluded_front" title="Occluded front">Occluded front</a></i></li> <li><b>Occlusion</b></li> <li><i><a href="/wiki/Overshooting_top" title="Overshooting top">Overshooting top</a></i></li> <li><i><a href="/wiki/Outflow_(meteorology)" title="Outflow (meteorology)">Outflow</a></i></li> <li><i><a href="/wiki/Outflow_boundary" title="Outflow boundary">Outflow boundary</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="P">P</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=16" title="Edit section: P"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Particularly_Dangerous_Situation" class="mw-redirect" title="Particularly Dangerous Situation">Particularly Dangerous Situation</a></i> (<i>PDS</i>)</li> <li><b>Path length</b> (<i>Pl</i>) – The distance a tornado traveled from formation to decay.</li> <li><b>Path width</b> (<i>Pw</i>) – The diameter of the tornado vortex winds (not the condensation funnel) capable of causing damage.</li> <li><b>Pearson scale</b> (or <b>Fujita-Pearson scale</b>) – A tornado rating scale developed by <a href="/wiki/Allen_Pearson" title="Allen Pearson">Allen Pearson</a> differentiating path length (P) and path width (P) to accompany NOAA Fujita scale (F) ratings (<b>F-P-P scale</b>).</li> <li><b>Pendant</b></li> <li><i><a href="/wiki/Phased_array_radar" class="mw-redirect" title="Phased array radar">Phased array radar</a></i></li> <li><b>Positive area</b></li> <li><i><a href="/wiki/Potential_temperature" title="Potential temperature">Potential temperature</a></i> (<i><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \theta }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>θ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \theta }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/6e5ab2664b422d53eb0c7df3b87e1360d75ad9af" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.09ex; height:2.176ex;" alt="{\displaystyle \theta }"></span></i>)</li> <li><i><a href="/wiki/Power_flash" title="Power flash">Power flash</a></i> – A sudden bright light caused when an <a href="/wiki/Overhead_power_line" title="Overhead power line">overhead power line</a> is severed or especially when a <a href="/wiki/Transformer" title="Transformer">transformer</a> explodes. These can be caused by intense winds (or debris) from tornadoes or downbursts, but the most prominent example occurred in New York City during <a href="/wiki/Hurricane_Sandy" title="Hurricane Sandy">Hurricane Sandy</a> when its <a href="/wiki/Storm_surge" title="Storm surge">storm surge</a> flooded a <a href="/wiki/Consolidated_Edison" title="Consolidated Edison">Con Ed</a> power plant.</li> <li><i><a href="/wiki/Precipitable_water" title="Precipitable water">Precipitable water</a></i></li> <li><b>Prefrontal trough</b></li> <li><b>Pressure falls</b></li> <li><i><a href="/wiki/Pressure_gradient" title="Pressure gradient">Pressure gradient</a></i></li> <li><i><a href="/wiki/Pressure_gradient_force" class="mw-redirect" title="Pressure gradient force">Pressure gradient force</a></i> (<b>PGF</b>)</li> <li><i><a href="/wiki/Pressure_system" title="Pressure system">Pressure system</a></i></li> <li><b>Probe</b></li> <li><b>PROFS</b> (<b>Prototype Regional Observing and Forecasting Service</b>)</li> <li><i><a href="/wiki/Weather_radar" title="Weather radar">Pulse-Doppler radar</a></i></li> <li><i><a href="/wiki/Pulse_storm" title="Pulse storm">Pulse storm</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="Q">Q</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=17" title="Edit section: Q"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Quasi-linear_convective_system" class="mw-redirect" title="Quasi-linear convective system">Quasi-linear convective system</a></i> (<i>QLCS</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="R">R</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=18" title="Edit section: R"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Radar_Operations_Center" title="Radar Operations Center">Radar Operations Center</a></i> (<b>ROC</b>)</li> <li><i><a href="/wiki/Radius_of_maximum_wind" title="Radius of maximum wind">Radius of maximum wind</a></i> (<i>RMW</i>)</li> <li><b>Rain-free base</b> (<b>RFB</b>)</li> <li><i><a href="/wiki/Rankine_vortex" title="Rankine vortex">Rankine vortex</a></i></li> <li><i><a href="/wiki/Rear_flank_downdraft" title="Rear flank downdraft">Rear flank downdraft</a></i> (<i>RFD</i>)</li> <li><i><a href="/wiki/Ridge_(meteorology)" title="Ridge (meteorology)">Ridge</a></i></li> <li><i><a href="/wiki/Roll_cloud" class="mw-redirect" title="Roll cloud">Roll cloud</a></i></li> <li><i><a href="/wiki/Remote_sensing" title="Remote sensing">Remote sensing</a></i></li> <li><b>Rope tornado</b></li> <li><i><a href="/wiki/Rossby_number" title="Rossby number">Rossby number</a></i></li> <li><i><a href="/wiki/Rossby_wave" title="Rossby wave">Rossby wave</a></i></li> <li><b>Rotation</b></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="S">S</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=19" title="Edit section: S"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Safe_room" title="Safe room">Safe room</a></i></li> <li><i><a href="/wiki/Satellite_tornado" title="Satellite tornado">Satellite tornado</a></i> – A smaller tornado that orbits a primary tornado associated with the same <a href="/wiki/Mesocyclone" title="Mesocyclone">mesocyclone</a>.</li> <li><b>Scouring</b> – Term used when soil and dirt is pulled from the surface after a tornado.</li> <li><i><a href="/wiki/Scud_(cloud)" title="Scud (cloud)">Scud</a></i> (Scattered Cumulus Under Deck)</li> <li><b>Severe local storm</b> (<b>SLS</b>) – A thunderstorm presenting severe characteristics in a localized area.</li> <li><b>Severe Local Storms Unit</b> (<b>SELS</b>) – A team of <a href="/wiki/National_Weather_Service" title="National Weather Service">National Weather Service</a> experts tasked with forecasting <a href="/wiki/Atmospheric_convection" title="Atmospheric convection">convective</a> weather. It was eventually included as a unit within the NSSFC.</li> <li><i><a href="/wiki/Severe_thunderstorm" class="mw-redirect" title="Severe thunderstorm">Severe thunderstorm</a></i> (<b>svr</b>) – A hazardous thunderstorm capable of causing injury or damage. The U.S. National Weather Service defines a severe thunderstorm as one producing 58 mph (93 km/h) or greater winds, 1 in (2.5 cm) or larger hail, or producing a funnel cloud or tornado.</li> <li><b>Shallow convection</b> – Occurs when convective instability exists, but no convection occurs</li> <li><b>Shear</b> – <a href="/wiki/Wind_shear" title="Wind shear">Wind shear</a> – Winds aloft, often measured in knots.</li> <li><b>Shear funnel</b> – Brief, often weak funnel generated by shear in a thunderstorm.</li> <li><i><a href="/wiki/Shelf_cloud" class="mw-redirect" title="Shelf cloud">Shelf cloud</a></i> – Generally associated with strong thunderstorms, found along the leading edge. Horizontal and dark in appearance.</li> <li><i><a href="/wiki/Shortwave_(meteorology)" title="Shortwave (meteorology)">Shortwave trough</a></i> – Embedded kink within seen in overall troughing patterns.</li> <li><b>Significant tornado</b> – A substantial tornado, one that is rated F2-F5 or EF2-EF5. <a href="/wiki/Thomas_P._Grazulis" title="Thomas P. Grazulis">Grazulis</a> also includes (E)F0-(E)F1 tornadoes that cause a fatality in his definition for The Tornado Project database.</li> <li><b>Significant tornado parameter</b> (<b>STP</b>) – Model parameter calculated using Shear values, Instability values, and vorticity values.</li> <li><i><a href="/wiki/Skipping_tornado" title="Skipping tornado">Skipping tornado</a></i> – Often considered a <a href="/wiki/Multi-vortex_tornado" class="mw-redirect" title="Multi-vortex tornado">Multi-vortex tornado</a>.</li> <li><i><a href="/wiki/Skywarn" title="Skywarn">Skywarn</a></i> – The storm spotting program of the US <a href="/wiki/National_Weather_Service" title="National Weather Service">National Weather Service</a>. Skywarn organizations have also been formed in <a href="/wiki/Skywarn_Europe" title="Skywarn Europe">Europe</a>. The Canadian program is <a href="/wiki/Canwarn" class="mw-redirect" title="Canwarn">Canwarn</a>.</li> <li><b>Slight risk</b> (<b>SLGT</b>)</li> <li><i><a href="/wiki/Space_Science_and_Engineering_Center" title="Space Science and Engineering Center">Space Science and Engineering Center</a></i> (<b>SSEC</b>)</li> <li><b>Speed shear</b></li> <li><b>Spin-up</b> – A small, ephemeral vortex. These can refer to tornadoes spawned by quasi-linear convective systems or tropical cyclones, which occasionally become strong and fairly long track. A spin-up may sometimes refer to a landspout or gustnado (the latter of which is rarely an actual tornado).</li> <li><b>Splitting storm</b> (or <b>storm split</b>)</li> <li><i><a href="/w/index.php?title=Stability_index&action=edit&redlink=1" class="new" title="Stability index (page does not exist)">Stability index</a></i></li> <li><b>Stacked low</b></li> <li><i><a href="/wiki/Steam_devil" title="Steam devil">Steam devil</a></i></li> <li><i><a href="/wiki/Storm_chasing" title="Storm chasing">Storm chasing</a></i> – Traveling with the intent to observe tornadoes and other <a href="/wiki/Severe_weather" title="Severe weather">severe weather</a>.</li> <li><b>Storm interaction</b></li> <li><b>Storm merger</b></li> <li><b>Storm relative environmental helicity</b> (<b>SREH</b>) or <b>storm relative helicity</b> (<b>SRH</b>)</li> <li><i><a href="/wiki/Storm_shelter" class="mw-redirect" title="Storm shelter">Storm shelter</a></i></li> <li><i><a href="/wiki/Storm_spotting" title="Storm spotting">Storm spotting</a></i> – The observation of severe weather by individuals trained in weather and reporting. Spotters can be stationary or mobile.</li> <li><i><a href="/wiki/Storm_Data" title="Storm Data">Storm Data</a></i> (<i>SD</i>) – A <a href="/wiki/National_Climatic_Data_Center" title="National Climatic Data Center">National Climatic Data Center</a> (NCDC) publication beginning in 1959 detailing quality controlled tornado and other severe weather summaries as the official <a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">NOAA</a> record of such events.</li> <li><i><a href="/wiki/Storm_Prediction_Center" title="Storm Prediction Center">Storm Prediction Center</a></i> (<i>SPC</i>) – The NWS national guidance center that issues tornado, severe thunderstorm (straight-line wind and hail), and wildfire <a href="/wiki/Weather_forecasting" title="Weather forecasting">forecasts</a>.</li> <li><b>Storm scale</b></li> <li><i><a href="/wiki/Storm_Track_(magazine)" class="mw-redirect" title="Storm Track (magazine)">Storm Track (magazine)</a></i> (<i>ST</i>) – A science and hobby magazine on storm chasing published from 1977 to 2002.</li> <li><b>Stovepipe tornado</b> – (slang) Storm chaser slang for a large cylindrically shaped tornado resembling a <a href="/wiki/Exhaust_pipe" class="mw-redirect" title="Exhaust pipe">stovepipe</a>.</li> <li><i><a href="/wiki/Straight-line_wind" class="mw-redirect" title="Straight-line wind">Straight-line wind</a></i></li> <li><b>Streamline</b></li> <li><b>Streamwise vorticity</b></li> <li><b>Striations</b></li> <li><b>Strong tornado</b> – A tornado rated F2-F3, EF2-EF3, T4-T7, or at least as strong as F2, EF2, T4.</li> <li><b>Subsidence</b></li> <li><b>Subvortex</b> – A smaller constituent vortex within a (<a href="/wiki/Multiple-vortex_tornado" title="Multiple-vortex tornado">multiple vortex</a>) tornado.</li> <li><b>Suction spot</b> – Older term for a subvortex.</li> <li><i><a href="/wiki/Supercell" title="Supercell">Supercell</a></i> (<b>sup</b>)</li> <li><b>Supercell composite parameter</b> (<b>SCP</b>) – Model parameter calculated using Instability values, Helicity, and effective bulk wind difference.</li> <li><b>Supertornado</b> – (slang) A colloquial term used to refer to a tornado achieving the maximum of some measurement, such as a F5/EF5 tornado.</li> <li><i><a href="/wiki/Surface_weather_analysis" title="Surface weather analysis">Surface weather analysis</a></i></li> <li><i><a href="/wiki/Surface_weather_observation" title="Surface weather observation">Surface weather observation</a></i></li> <li><i><a href="/wiki/Synoptic_scale_meteorology" title="Synoptic scale meteorology">Synoptic scale meteorology</a></i></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="T">T</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=20" title="Edit section: T"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table border="1" cellpadding="10" cellspacing="0" style="text-align: center; float:left; margin:0.46em 1.38em"> <caption>Tornado rating classifications </caption> <tbody><tr> <th style="background: #e0e0ff;"><b>F0<br />EF0</b> </th> <th style="background: #e0e0ff;"><b>F1<br />EF1</b> </th> <th style="background: #e0e0ff;"><b>F2<br />EF2</b> </th> <th style="background: #e0e0ff;"><b>F3<br />EF3</b> </th> <th style="background: #e0e0ff;"><b>F4<br />EF4</b> </th> <th style="background: #e0e0ff;"><b>F5<br />EF5</b> </th></tr> <tr> <td colspan="2" style="background: #fd0;">Weak </td> <td colspan="2" style="background: #f3943f;">Strong </td> <td colspan="2" style="background: #ea5297;">Violent </td></tr> <tr> <td colspan="2"> </td> <td colspan="4" style="background: #ffce44;">Significant </td></tr> <tr> <td colspan="3"> </td> <td colspan="3" style="background: #e84e0f;">Intense </td></tr> </tbody></table> <div style="clear:both;" class=""></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Tail</b> – (slang) A colloquial term for a tornado; most commonly used in the Southern U.S.</li> <li><i><a href="/wiki/Wall_cloud#Associated_features" title="Wall cloud">Tail cloud</a></i></li> <li><i><a href="/wiki/Temperature" title="Temperature">Temperature</a></i></li> <li><i><a href="/wiki/Terminal_Doppler_Weather_Radar" title="Terminal Doppler Weather Radar">Terminal Doppler Weather Radar</a></i> (<i>TDWR</i>) –</li> <li><i><a href="/wiki/Thermal" title="Thermal">Thermal</a></i></li> <li><i><a href="/wiki/Atmospheric_thermodynamics" title="Atmospheric thermodynamics">Thermodynamics</a></i></li> <li><i><a href="/wiki/Thunderstorm" title="Thunderstorm">Thunderstorm</a></i> (tstm)</li> <li><i><a href="/w/index.php?title=The_Thunderstorm_Project&action=edit&redlink=1" class="new" title="The Thunderstorm Project (page does not exist)">The Thunderstorm Project</a></i></li> <li><b>Thunderstorm spectrum</b></li> <li><i><a href="/wiki/Tilted_updraft" title="Tilted updraft">Tilted updraft</a></i></li> <li><i><a href="/wiki/Tornado" title="Tornado">Tornado</a></i> (tor)</li> <li><i><a href="/wiki/Tornado_Alley" title="Tornado Alley">Tornado Alley</a></i> – A colloquial term referring to regions where tornadoes are perceived as striking more frequently than other areas. It may also be referred to as a <b>tornado belt</b>, especially when describing smaller areas.</li> <li><i><a href="/wiki/Tornado_climatology" title="Tornado climatology">Tornado climatology</a></i> – The study of geographical and temporal distribution of tornadoes and causes thereof.</li> <li><b>Tornado couplet</b> – A primary cyclonic tornado and secondary <a href="/wiki/Anticyclonic_tornado" title="Anticyclonic tornado">anticyclonic tornado</a> pair.</li> <li><b>Tornado Debris Project</b> (<b>TDP</b>)</li> <li><i><a href="/wiki/Tornado_debris_signature" title="Tornado debris signature">Tornado debris signature</a></i> (<b>TDS</b>) – A more formal term for a <a href="/wiki/Debris_ball" class="mw-redirect" title="Debris ball">debris ball</a>.</li> <li><i><a href="/wiki/Tornado_emergency" title="Tornado emergency">Tornado emergency</a></i> – Enhanced wording used by the U.S. National Weather Service in a <a href="/wiki/Tornado_warning" title="Tornado warning">tornado warning</a> or <a href="/wiki/Severe_weather_statement" class="mw-redirect" title="Severe weather statement">severe weather statement</a> when a large, intense tornado is expected to impact a highly populated area (traverse a large city or dense suburbs).</li> <li><i><a href="/wiki/Tornado_family" title="Tornado family">Tornado family</a></i> – A series of tornadoes spawned by successive (low-level) <a href="/wiki/Mesocyclone" title="Mesocyclone">mesocyclones</a> of the same <a href="/wiki/Supercell" title="Supercell">supercell</a> thunderstorm in a process known as <a href="/wiki/Tornadogenesis" title="Tornadogenesis">cyclic tornadogenesis</a>. Multiple such supercells occurring on the same day in a common region results in a <b>corridor outbreak</b> of tornadoes.</li> <li><b>Tornado fog</b></li> <li><b>Tornado Force scale</b> (<b>TF scale</b>)</li> <li><b>Tornado Intercept Project</b> (<b>TIP</b>)</li> <li><i><a href="/wiki/Tornado_outbreak" title="Tornado outbreak">Tornado outbreak</a></i></li> <li><i><a href="/wiki/Tornado_outbreak_sequence" class="mw-redirect" title="Tornado outbreak sequence">Tornado outbreak sequence</a></i></li> <li><i><a href="/wiki/Tornado_preparedness" title="Tornado preparedness">Tornado preparedness</a></i></li> <li><b>The Tornado Project</b> (<b>TP</b>) – A concerted research effort from the 1970s-1990s by <a href="/wiki/Thomas_P._Grazulis" title="Thomas P. Grazulis">Thomas P. Grazulis</a> that compiled tornado information for risk assessment. TP published exhaustive accounts, tabulations, and analysis of all known significant tornadoes in the US from 1680 to 1995, which comprises one of three tornado databases.</li> <li><b>Tornado pulse</b></li> <li><b>Tornado rating</b> – A subjective integer value assigned to a tornado differentiating its intensity (or path length or width), typically as a proxy inferred by damage analysis.</li> <li><b>Tornado roar</b></li> <li><b>Tornado scale</b></li> <li><b>Tornado season</b></li> <li><b>Tornado stages</b></li> <li><b>Tornado Symposium</b></li> <li><i><a href="/wiki/Tornado_vortex_signature" title="Tornado vortex signature">Tornado vortex signature</a></i> (or <i>tornadic vortex signature</i>) (<i>TVS</i>)</li> <li><i><a href="/wiki/Tornado_watch" title="Tornado watch">Tornado watch</a></i> (<i>TOA</i> or <i>WT</i>) – A forecast that atmospheric conditions within a designated area are favorable for significant tornado activity over the next 1–6 hours (colloquially referred to as <b>red box</b>).</li> <li><i><a href="/wiki/Tornado_warning" title="Tornado warning">Tornado warning</a></i> (<i>TOR</i>) – A tornado is occurring or is imminent as one is sighted or is suggested by <a href="/wiki/Weather_radar" title="Weather radar">radar</a>.</li> <li><b>Tornadocyclone</b> – The parent circulation of a tornado. This may refer to a low-level <a href="/wiki/Mesocyclone" title="Mesocyclone">mesocyclone</a>.</li> <li><i><a href="/wiki/Tornadogenesis" title="Tornadogenesis">Tornadogenesis</a></i> – The process leading to tornado formation.</li> <li><b>Tornadolysis</b> – The process leading to tornado decay and death.</li> <li><i><a href="/wiki/TORRO" title="TORRO">TORRO</a></i> (<i>TORnado and storm Research Organisation</i>)</li> <li><i><a href="/wiki/TORRO_scale" title="TORRO scale">TORRO scale</a></i> – A tornado rating scale developed by Terence Meaden of <a href="/wiki/TORRO" title="TORRO">TORRO</a> classifying tornadoes in the UK from T0-T10 based on intensity.</li> <li><i><a href="/wiki/TOtable_Tornado_Observatory" title="TOtable Tornado Observatory">TOTO</a></i> (<i>TOtable Tornado Observatory</i>)</li> <li><b>Transverse rolls</b></li> <li><b>Trigger</b> – (slang)</li> <li><i><a href="/wiki/Tropical_cyclone" title="Tropical cyclone">Tropical cyclone</a></i> (<b>TC</b>)</li> <li><i><a href="/wiki/Trough_(meteorology)" title="Trough (meteorology)">Trough</a></i></li> <li><b>Tube</b> – (slang) A storm chaser term for a tornado.</li> <li><i><a href="/wiki/Turbulence" title="Turbulence">Turbulence</a></i></li> <li><b>Twister</b> – (slang) A colloquial term for a tornado. Also, a <a href="/wiki/Twister_(1996_film)" title="Twister (1996 film)">major theatrical film</a> about storm chasing released in 1996.</li> <li><i><a href="/wiki/TWISTEX" title="TWISTEX">TWISTEX</a></i> (<i>Tactical Weather-Instrumented Sampling in/near Tornadoes EXperiment</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="U">U</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=21" title="Edit section: U"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Vertical_draft" title="Vertical draft">Updraft</a></i></li> <li><i><a href="/wiki/University_Corporation_for_Atmospheric_Research" title="University Corporation for Atmospheric Research">University Corporation for Atmospheric Research</a></i> (<i>UCAR</i>)</li> <li><i><a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">UTC</a></i> (<i>Coordinated Universal Time</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="V">V</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=22" title="Edit section: V"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Vault</b></li> <li><b>V notch</b></li> <li><b>Velocity couplet</b></li> <li><b>Vent shear</b> or <b>vent wind</b></li> <li><b>Very long track tornado</b> (<b>VLT</b>)</li> <li><b>Violent tornado</b> – A tornado rated F4-F5, EF4-EF5, or T8-T11.</li> <li><i><a href="/wiki/Vortex" title="Vortex">Vortex</a></i></li> <li><i><a href="/w/index.php?title=Vortex_breakdown&action=edit&redlink=1" class="new" title="Vortex breakdown (page does not exist)">Vortex breakdown</a></i></li> <li><i><a href="/wiki/Vortex_stretching" title="Vortex stretching">Vortex stretching</a></i></li> <li><i><a href="/wiki/VORTEX_projects" title="VORTEX projects">VORTEX projects</a></i></li> <li><i><a href="/wiki/Vorticity" title="Vorticity">Vorticity</a></i></li> <li><b>Vorticity maximum</b> (<b>vort max</b>)</li> <li><b>Vorticity minimum</b></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="W">W</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=23" title="Edit section: W"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><i><a href="/wiki/Wall_cloud" title="Wall cloud">Wall cloud</a></i></li> <li><b>Warm air advection</b> (<b>WAA</b>)</li> <li><i><a href="/wiki/Warm_front" title="Warm front">Warm front</a></i></li> <li><i><a href="/wiki/Warning_Decision_Training_Branch" class="mw-redirect" title="Warning Decision Training Branch">Warning Decision Training Branch</a></i> (<i>WDTB</i>)</li> <li><i><a href="/wiki/Waterspout" title="Waterspout">Waterspout</a></i></li> <li><i><a href="/wiki/Weak_echo_region" class="mw-redirect" title="Weak echo region">Weak echo region</a></i> (<i>WER</i>)</li> <li><b>Weak tornado</b> – A tornado rated F0-F1, EFO-EF1, T0-T3.</li> <li><i><a href="/wiki/Weather_map" title="Weather map">Weather map</a></i></li> <li><i><a href="/wiki/Weather_Prediction_Center" title="Weather Prediction Center">Weather Prediction Center</a></i> (<i>WPC</i>)</li> <li><i><a href="/wiki/Weather_radar" title="Weather radar">Weather radar</a></i></li> <li><i><a href="/wiki/Weather_satellite" title="Weather satellite">Weather satellite</a></i></li> <li><i><a href="/wiki/Weather_radar" title="Weather radar">Weather surveillance radar</a></i> (<i>WSR</i>)</li> <li><i><a href="/wiki/Weatherwise" title="Weatherwise">Weatherwise</a></i> – A photographically adorned general interest weather magazine that frequently publishes articles on tornadoes and other severe weather.</li> <li><b>Wedge tornado</b> – (slang) Storm chaser slang for a very large tornado. Typically a wedge tornado is defined as one that is wider at ground level than it is tall (from ground to cloud base).</li> <li><i><a href="/wiki/Whirlwind" title="Whirlwind">Whirlwind</a></i></li> <li><i><a href="/wiki/Wind" title="Wind">Wind</a></i></li> <li><i><a href="/wiki/Windstorm" class="mw-redirect" title="Windstorm">Windstorm</a></i></li> <li><i><a href="/wiki/Wind_direction" title="Wind direction">Wind direction</a></i></li> <li><i><a href="/wiki/Wind_profiler" title="Wind profiler">Wind profiler</a></i></li> <li><i><a href="/wiki/Wind_shear" title="Wind shear">Wind shear</a></i></li> <li><i><a href="/wiki/Wind_speed" title="Wind speed">Wind speed</a></i></li> <li><b>Wind Science and Engineering Research Center</b> (<i>WiSE</i>)</li> <li><i><a href="/wiki/Winter_waterspout" class="mw-redirect" title="Winter waterspout">Winter waterspout</a></i></li> <li><i><a href="/wiki/World_Meteorological_Organization" title="World Meteorological Organization">World Meteorological Organization</a></i> (<i>WMO</i>)</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="Z">Z</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=24" title="Edit section: Z"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col" style="column-width: 22em;"> <ul><li><b>Zulu</b> (<b>Z</b>) – Zulu is a <a href="/wiki/NATO_phonetic_alphabet" title="NATO phonetic alphabet">phonetic alphabet</a> word for Z, which is an abbreviation used in <a href="/wiki/Timecode" title="Timecode">timecodes</a> to represent UTC.</li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=25" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Glossary_of_meteorology" title="Glossary of meteorology">Glossary of meteorology</a></li> <li><a href="/wiki/Glossary_of_climate_change" title="Glossary of climate change">Glossary of climate change</a></li> <li><a href="/wiki/Glossary_of_tropical_cyclone_terms" title="Glossary of tropical cyclone terms">Glossary of tropical cyclone terms</a></li> <li><a href="/wiki/List_of_cloud_types" title="List of cloud types">List of cloud types</a></li> <li><a href="/wiki/List_of_severe_weather_phenomena" title="List of severe weather phenomena">List of severe weather phenomena</a></li> <li><a href="/wiki/List_of_tornadoes_and_tornado_outbreaks" class="mw-redirect" title="List of tornadoes and tornado outbreaks">List of tornadoes and tornado outbreaks</a></li> <li><a href="/wiki/Severe_weather_terminology_(disambiguation)" class="mw-redirect mw-disambig" title="Severe weather terminology (disambiguation)">Severe weather terminology (disambiguation)</a></li> <li><a href="/wiki/Tornado_intensity_and_damage" class="mw-redirect" title="Tornado intensity and damage">Tornado intensity and damage</a></li> <li><a href="/wiki/Tornado_records" title="Tornado records">Tornado records</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=26" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.srh.noaa.gov/oun/?n=spotterglossary2#d">Weather Glossary for Storm Chasers</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.tornadofacts.net/tornado-terms.php">Tornado Terms</a> – Tornado Terminology</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Glossary_of_tornado_terms&action=edit&section=27" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://glossary.ametsoc.org/wiki/Main_Page">Glossary of Meteorology</a> (<a href="/wiki/American_Meteorological_Society" title="American Meteorological Society">American Meteorological Society</a>)</li> <li><a rel="nofollow" class="external text" href="http://www.nws.noaa.gov/glossary/">NWS Glossary</a> (<a href="/wiki/National_Weather_Service" title="National Weather Service">National Weather Service</a>)</li> <li><a rel="nofollow" class="external text" href="http://www.spc.noaa.gov/faq/tornado/">Tornado FAQ</a> (<a href="/wiki/Storm_Prediction_Center" title="Storm Prediction Center">Storm Prediction Center</a>)</li> <li><a rel="nofollow" class="external text" href="http://www.srh.noaa.gov/oun/?n=spotterglossary">Storm spotter glossary</a> (<a href="/wiki/National_Weather_Service" title="National Weather Service">National Weather Service</a>)</li> <li><a rel="nofollow" class="external text" href="http://theweatherprediction.com/">TheWeatherPrediction.com</a> (Jeff Haby)</li> <li><a rel="nofollow" class="external text" href="http://ww2010.atmos.uiuc.edu/%28Gh%29/indexlist.rxml">WW2010 Helper Section Index</a> (<a href="/wiki/University_of_Illinois_at_Urbana-Champaign" class="mw-redirect" title="University of Illinois at Urbana-Champaign">University of Illinois at Urbana-Champaign</a>)</li> <li><a rel="nofollow" class="external text" href="http://weather.cod.edu/sirvatka/glossary.html">Basic Meteorological Terminology</a> (Paul Sirvatka, <a href="/wiki/College_of_DuPage" title="College of DuPage">College of DuPage</a>)</li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Glossary_of_tornado_terms&oldid=1259272196">https://en.wikipedia.org/w/index.php?title=Glossary_of_tornado_terms&oldid=1259272196</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Severe_weather_and_convection" title="Category:Severe weather and 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