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Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
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.
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 ...
However, Croskery has noted that many tornado shelters don't open until there is an active tornado warning. "Thirteen minutes is the average lead time for a tornado.
Severe thunderstorms, including destructive tornadoes, raked through the South in the days between Christmas and New Year's 2024, from Texas to South Carolina.
PDS tornado warnings are currently issued on an experimental basis by the 38 National Weather Service Weather Forecast Offices within the Central Region. [19] The criteria for a PDS warning are when a tornado on the ground has been spotted or confirmed, or a significant tornado is expected based on radar signatures.
A tornado outbreak threatened parts of the South on Saturday, prompting forecasters to issue a rare "particularly dangerous situation" alert amid severe storms that have killed at least one person ...
A PX-1000 transportable radar unit operated by University of Oklahoma's Advanced Radar Research Center was used to observe the path of the tornado through Moore, with researchers detailing a "loop" in the path near the Moore Medical Center as a "failed occlusion". [41] EF3 May 28, 2013: Bennington, Kansas — — 264 mph (425 km/h)