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An example of a tornado warning polygon issued by the National Weather Service. A tornado warning (SAME code: TOR) is a public warning that is issued by weather forecasting agencies to an area in the direct path of a tornado, or a severe thunderstorm capable of producing one, and advises individuals in that area to take cover.
NOAA National Weather Service Improves Tornado Rating System at NOAA News; The Enhanced Fujita Scale (EF Scale) at Storm Prediction Center; EF-Scale Training Archived June 21, 2017, at the Wayback Machine at The Warning Decision Training Branch of National Weather Service (NWS) The Enhanced Fujita Tornado Scale at National Climatic Data Center
A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the scale from one to five, a high risk is a level five; thus, high risks are issued only when forecasters at the SPC are confident of a major severe weather outbreak.
A tornado warning is more severe than a tornado watch, indicating that people take action and seek shelter. A watch signals that a tornado could occur, while a warning signals once a tornado has ...
A tornado warning means "take action now" as a tornado has been sighted or is indicated by weather radar. There is imminent danger to life and property. Move to an interior room on the lowest ...
A tornado warning is issued when a tornado has been sighted or indicated by weather radar. When a tornado warning is issued, the NWS recommends taking immediate action and moving to the lowest ...
Severe weather statement SVS – A statement issued to provide updated information for active severe thunderstorm and tornado warnings to the public and emergency managers, with revised information including reports of observed severe weather and the approximate location of the storm cell (as indicated by the most recently updated NEXRAD data ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...