Two-day U.S. Tornado Outbreak Kills at Least 29 People; More Tornadoes Expected Today ~Dr. Jeff Masters, Weather Underground
Tornado and severe weather outbreak continues on Tuesday and Wednesday
The strong, slow-moving low pressure system that brought this weekend’s deadly tornadoes will spawn spawn more supercell thunderstorms capable of generating large hail, damaging winds, and a few strong tornadoes on Tuesday. NOAA’s Storm Prediction Center (SPC) has issued their “Moderate Risk” forecast of severe weather over much of Mississippi and Alabama for Tuesday, with a wide swath of the Eastern half of the U.S. under a “Slight Risk” of severe weather. The set-up for getting strong tornadoes does not appear to be as dangerous today as it was on Monday, and I don’t think we will see as many tornadoes. The upper-level winds over the Southeast U.S. will not be as strong, leading to less wind shear available to get tornadoes spinning. Still, instability will be very high, and I do expect we will see a few strong EF-3 tornadoes in Mississippi and Alabama. The risk of severe weather will diminish considerably on Wednesday, but most of the Southeast U.S. will be still be in SPC’s “Slight Risk” region for severe weather. The severe threat will finally end Thursday morning as the cold front responsible moves off the coast. Read more.