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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.
The Storm Prediction Center issues daily outlooks denoting the risk for severe weather and wildfires for specific regions in the United States. For severe weather, which includes the risk for thunderstorms, tornadoes, hail, and straight-line winds, there are five risk levels indicating the probability for these hazards: marginal, slight, enhanced, moderate, and high.
The moderate risk zone is the second highest risk zone in the NWS’ severe weather outlook. A tornado watch has been issued for Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden ...
The NWS said golf ball or larger size hail, winds gusts up to 70 miles per hour and significant tornadoes are once again all possible. Confidence in severe weather Wednesday is moderate to high ...
In a comment on a Facebook post , the NWS said this afternoon's storms are "expected to be very dangerous". Thunderstorms will likely start in west Iowa around 2 p.m., making their way to Des ...
In National Weather Service (NWS) terminology, a Hazardous Weather Outlook is a weather statement issued to provide information of potential severe weather events within the next seven days. The outlook may include information about potential severe thunderstorms, heavy rain or flooding, winter weather, extremes temperatures. [1]
One model posted by the National Weather Service showed storms firing up west of the Tri-State around 5 p.m., then moving through the Evansville and Henderson areas between 6 p.m. and 9 p.m.