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Satellite image of the storm system responsible for the tornado outbreak that occurred on April 25–28, 2024. On April 20, 2024, the National Weather Service's Storm Prediction Center (SPC) first delineated a severe weather risk for April 25–26, highlighting a zone extending from the Central Great Plains northeastward to the Midwestern U.S.
Strong mesocyclone on a thunderstorm near Tuscaloosa, Alabama, that was analyzed as fitting the characteristics of a TVS.It was associated with a tornado.. A tornadic vortex signature, abbreviated TVS, is a Pulse-Doppler radar weather radar detected rotation algorithm that indicates the likely presence of a strong mesocyclone that is in some stage of tornadogenesis. [1]
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 ...
SPC storm reports for November 17, showing the extent of the tornado outbreak and subsequent wind event. With the overall upper-level system expected to track eastward across the United States High Plains on November 17, the SPC issued a slight risk for severe thunderstorm activity for an area surrounding the confluence of the Mississippi and Missouri rivers, valid for the early morning hours ...
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NEXRAD radar imagery of an EF2 tornado near Alta Vista, Kansas on March 13, 2024 (supercell with hook echo on left, velocity on right). The weather system responsible for the outbreak was evident multiple days prior, but the area that received the worst tornadoes was not expected to be the main threat.