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Day 4–8 outlooks are the longest-term official SPC Forecast Product, and often change significantly from day to day. This extended forecast for severe weather was an experimental product until March 22, 2007, when the Storm Prediction Center incorporated it as an official product.
High risk convective outlook issued by the Storm Prediction center at 13:00 UTC on May 6 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, and by May 1, a 15% risk was added across Nebraska, Kansas, Oklahoma, and northern Texas.
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.
This chart explains the various threat levels when it comes to severe thunderstorm outlook categories. Another round of severe weather in forecast Tuesday’s weather will kick off a stormy period ...
Forecasters in the severe weather outlook said strong thunderstorms appear likely. The main hazards in the storms are tornadoes EF-2 or stronger, significant destructive winds up to 70 miles per ...
The weather service office of Chicago also warned of the outbreak of storms and threats possible through the evening. In Chicago, the highest severe weather risk will be from 7 p.m. to 1 a.m ...
The categorical forecast in the Day 1-3 Convective Outlooks—which estimates a severe weather event occurring within 25 miles (40 km) of a point and derives the attendant risk areas from probability forecasts of tornadoes, damaging winds, and large hail on Days 1 and 2, and a combined severe weather risk on Day 3—specifies the level of ...
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 ...
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