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- Severe_thunderstorm_watch abstract "A Severe Thunderstorm Watch (SAME code: SVA) is issued when weather conditions are favorable for the development of severe thunderstorms. If thunderstorms are expected to be of sufficient strength such that there is a significant risk that they may produce tornadoes, then a Tornado Watch (which also automatically implies that severe thunderstorms are possible) is issued. A Severe Thunderstorm Watch can also be upgraded to a Tornado Watch if conditions originally forecasted for limited to no tornadic development change to allow possible tornado formation (in which case the existing severe thunderstorm watch, or a portion of it, would be replaced). A watch must not be confused with a Severe Thunderstorm Warning.A watch does not necessarily mean that severe weather is actually occurring, only that atmospheric conditions have created a significant risk for severe weather to occur. If severe weather actually does occur, a severe thunderstorm warning or tornado warning will be issued, and urgent action should be taken immediately. While a severe thunderstorm watch does not imply in its name the risk for tornadoes, the risk for tornadoes in such a scenario is not necessarily zero as severe thunderstorms can and occasionally do spawn tornadoes even after only a severe thunderstorm watch has been issued.In the United States, the Storm Prediction Center (a national guidance center of the National Weather Service (NWS)) issues watches for areas of the lower 48 states that are likely to produce tornadoes and/or severe thunderstorms. The local NWS forecast offices in Hawaii and Alaska issue their own Severe Thunderstorm and Tornado Watches.The terms \"blue box\" and \"yellow box\" refer to the assigned coloring used for watch box outlines used in Storm Prediction Center and National Weather Service products as well as by television broadcast media (in the case of the latter, blue is typically assigned to highlight severe thunderstorm watches whereas yellow is often assigned to severe thunderstorm warnings).The watch boxes (or weather watches, WWs) are usually issued in the format of x miles north and south, or east and west, or either side of a line from y miles direction of city, state, to z miles another direction of another city, state. For example: \"50 miles either side of a line from 10 miles northeast of Columbia, South Carolina to 15 miles south-southwest of Montgomery, Alabama\". (\"Either side\" means perpendicular to the center line.) When displayed on a map, they are usually shown as either a blue or yellow outline, depending on the source. In addition, a list of all counties included in its area of responsibility is now issued by each local NWS forecast office for each watch.In the event that a Severe Thunderstorm Watch is likely to lead to very destructive winds or hail (usually from a major derecho event), enhanced wording with the words Particularly Dangerous Situation (PDS) can be added to the watch. This is rare with Severe Thunderstorm Watches, since the tornado threat has to remain low enough to only warrant a Severe Thunderstorm Watch and a higher tornado threat would warrant a normal Tornado Watch despite the extreme wind or hail threat. It is far more common with Tornado Watches.Similar watches and warnings are issued by Environment Canada's Meteorological Service of Canada from their offices in Vancouver, Edmonton, Toronto, Montreal and Dartmouth, Nova Scotia.".
- Severe_thunderstorm_watch thumbnail Annual_severe_thunderstorm_watch_frequency_in_the_United_States.svg?width=300.
- Severe_thunderstorm_watch wikiPageExternalLink warning_e.cfm?.
- Severe_thunderstorm_watch wikiPageExternalLink watch.
- Severe_thunderstorm_watch wikiPageID "275611".
- Severe_thunderstorm_watch wikiPageLength "13770".
- Severe_thunderstorm_watch wikiPageOutDegree "29".
- Severe_thunderstorm_watch wikiPageRevisionID "694119763".
- Severe_thunderstorm_watch wikiPageWikiLink Alaska.
- Severe_thunderstorm_watch wikiPageWikiLink Category:Weather_warnings_and_advisories.
- Severe_thunderstorm_watch wikiPageWikiLink Cold_front.
- Severe_thunderstorm_watch wikiPageWikiLink County_(United_States).
- Severe_thunderstorm_watch wikiPageWikiLink Dartmouth,_Nova_Scotia.
- Severe_thunderstorm_watch wikiPageWikiLink Derecho.
- Severe_thunderstorm_watch wikiPageWikiLink Dry_line.
- Severe_thunderstorm_watch wikiPageWikiLink Edmonton.
- Severe_thunderstorm_watch wikiPageWikiLink Environment_and_Climate_Change_Canada.
- Severe_thunderstorm_watch wikiPageWikiLink Hawaii.
- Severe_thunderstorm_watch wikiPageWikiLink June_2012_North_American_derecho.
- Severe_thunderstorm_watch wikiPageWikiLink Meteorological_Service_of_Canada.
- Severe_thunderstorm_watch wikiPageWikiLink Montreal.
- Severe_thunderstorm_watch wikiPageWikiLink National_Weather_Service.
- Severe_thunderstorm_watch wikiPageWikiLink Nova_Scotia.
- Severe_thunderstorm_watch wikiPageWikiLink Particularly_Dangerous_Situation.
- Severe_thunderstorm_watch wikiPageWikiLink Perpendicular.
- Severe_thunderstorm_watch wikiPageWikiLink Severe_thunderstorm_warning.
- Severe_thunderstorm_watch wikiPageWikiLink Severe_weather.
- Severe_thunderstorm_watch wikiPageWikiLink Specific_Area_Message_Encoding.
- Severe_thunderstorm_watch wikiPageWikiLink Storm_Prediction_Center.
- Severe_thunderstorm_watch wikiPageWikiLink Thunderstorm.
- Severe_thunderstorm_watch wikiPageWikiLink Tornado.
- Severe_thunderstorm_watch wikiPageWikiLink Tornado_warning.
- Severe_thunderstorm_watch wikiPageWikiLink Tornado_watch.
- Severe_thunderstorm_watch wikiPageWikiLink Toronto.
- Severe_thunderstorm_watch wikiPageWikiLink United_States.
- Severe_thunderstorm_watch wikiPageWikiLink Vancouver.
- Severe_thunderstorm_watch wikiPageWikiLink File:Annual_severe_thunderstorm_watch_frequency_in_the_United_States.svg.
- Severe_thunderstorm_watch wikiPageWikiLinkText "Severe Thunderstorm Watch".
- Severe_thunderstorm_watch wikiPageWikiLinkText "Severe thunderstorm watch".
- Severe_thunderstorm_watch wikiPageWikiLinkText "Severe weather watch".
- Severe_thunderstorm_watch wikiPageWikiLinkText "severe thunderstorm watch".
- Severe_thunderstorm_watch wikiPageWikiLinkText "severe thunderstorm".
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Citation_needed.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Col-begin.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Col-break.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Col-end.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Legend.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:Reflist.
- Severe_thunderstorm_watch wikiPageUsesTemplate Template:SevWea_nav.
- Severe_thunderstorm_watch subject Category:Weather_warnings_and_advisories.
- Severe_thunderstorm_watch type Redirect.
- Severe_thunderstorm_watch comment "A Severe Thunderstorm Watch (SAME code: SVA) is issued when weather conditions are favorable for the development of severe thunderstorms. If thunderstorms are expected to be of sufficient strength such that there is a significant risk that they may produce tornadoes, then a Tornado Watch (which also automatically implies that severe thunderstorms are possible) is issued.".
- Severe_thunderstorm_watch label "Severe thunderstorm watch".
- Severe_thunderstorm_watch sameAs Q7457849.
- Severe_thunderstorm_watch sameAs m.01p8_b.
- Severe_thunderstorm_watch sameAs Q7457849.
- Severe_thunderstorm_watch wasDerivedFrom Severe_thunderstorm_watch?oldid=694119763.
- Severe_thunderstorm_watch depiction Annual_severe_thunderstorm_watch_frequency_in_the_United_States.svg.
- Severe_thunderstorm_watch isPrimaryTopicOf Severe_thunderstorm_watch.