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The Storm Prediction Center issues convective outlooks (AC), consisting of categorical and probabilistic forecasts describing the general threat of severe convective storms over the contiguous United States for the next six to 192 hours (Day 1 through Day 8). These outlooks are labeled and issued by day, and are issued up to five times per day.
The outlook included a 45% significant tornado area that was introduced at 1630Z (the first instance of a 45% area being added prior to the 20Z outlook), which is above the minimum threshold for a high risk. It also produced the first known watch (PDS tornado watch 235) with a >95% probability for all severe and significant severe hazards. [273]
Progression of a well-anticipated extremely critical event across the Central Plains on March 6, 2017. This event produced wildfires that burned 1,200,000 acres of land, and killed seven people. An extremely critical fire weather event is the greatest threat level issued by the NWS Storm Prediction Center (SPC) for wildfire events in the United ...
On the evening of March 24, 2023, a large, violent and destructive multi-vortex wedge tornado struck the communities of Rolling Fork and Silver City, Mississippi, killing 17 people and injuring at least 165 others. [1][2][3][4] The tornado was the strongest and deadliest of a widespread tornado outbreak in the Southern United States between ...
However, at 0600 UTC on November 17, the SPC upgraded to a high risk for severe weather on the 17th (the second latest date in the year a high risk has been issued since 2000, and the latest in the Midwest) for regions of Illinois, Indiana, southwestern Michigan, and western Ohio, in anticipation of conditions becoming increasingly favorable ...
From April 25 to 28, 2024, a very large, deadly and destructive tornado outbreak occurred across the Midwestern, Southern, and High Plains regions of the United States, primarily on April 26 and 27. [3] On April 26, the Storm Prediction Center (SPC) first issued an enhanced risk for the Plains, as a broad upper-trough moved eastwards, with ...
File usage. Global file usage. No higher resolution available. SPC_June_29,_2020_0100_UTC_outlook_map.gif (582 × 408 pixels, file size: 160 KB, MIME type: image/gif, looped, 7 frames, 3.5 s) This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository.
High risk convective outlook issued by the Storm Prediction center at 13:00 UTC on May 6. Starting April 30, the Storm Prediction Center noted that certain models, including the ECMWF, forecasted a multi-day period of high instability and supportive wind shear across the Southern and Central Plains, [10] and by May 1, a 15% risk was added across Nebraska, Kansas, Oklahoma, and northern Texas. [11]