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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.
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.
Hurricane Hilary. Hurricane Hilary was a large and powerful Pacific hurricane in August 2023 that brought torrential rainfall and gusty winds to the Pacific Coast of Mexico, the Baja California Peninsula, and the Southwestern United States, resulting in widespread flooding and mudslides. The cyclone was the eighth named storm, sixth hurricane ...
The prediction center cautioned at least 8 inches of rain is possible in less than 24 hours for portions of the Transverse Ranges in Southern California, with maximum totals just over 10 inches ...
January 31, 2024 at 8:50 AM. Motorists are warned of severe weather and to avoid travel amid heavy rain in Los Angeles in 2023. (David McNew/Getty Images) (David McNew via Getty Images) California ...
Snow is projected at high elevations, with a winter storm warning in effect across much of the Sierra Nevada, where a foot or more is forecast. In the Southern California mountains, up to 8 inches ...
Hyperactive Pacific storm train to keep slamming California. Alex Sosnowski. January 5, 2023 at 12:34 PM. Deadly storms unleashed fierce back-to-back blows to California at the end of 2022 and the ...
In the United States, severe thunderstorm watches are issued by the Storm Prediction Center (SPC), a national guidance center of the National Weather Service (NWS) branch of the National Oceanic and Atmospheric Administration (NOAA), [4] [5] for areas of the lower 48 states where atmospheric conditions favor the development of convective thunderstorm activity reaching severe criteria.