The severe weather event for the Midwest to the mid-Atlantic is very complex to say the least. We have many features moving through the flow that will trigger severe storms across the Midwest and Ohio Valley. The low-level jet will strengthen into Pennsylvania and move under a the left rear quadrant of the jet Thursday morning, so it's not out of the question that severe weather is ongoing Thursday morning through Pennsylvania.
Just to clarify, I am not in the derecho camp. I do think we will see severe clusters of thunderstorms that may produce damaging winds and heavy rain, but I don't believe we are going to see that type of derecho we saw last year across Ohio Valley and mid-Atlantic.
What we will see are supercell type storms near the low center that will produce damaging winds and tornadoes from Illinois through northern Virginia and the Delmarva Peninsula.
The serious part of the event is the potential for tornadoes in the populated areas of the Midwest, Ohio Valley and mid-Atlantic. I can see 20 reports of tornadoes and over 100 reports of wind damage.
Winter returns today and Saturday as temperatures are 10-25 degrees below normal. Some snow may fall across New England.
The cold front will move through the East today and bring colder weather Friday and Saturday.
Severe storms will hit the southern Plains today. This is the start of severe weather season.
Severe storms will develop today and Wednesday. Impacts will be hail and damaging winds.
Severe storms Tuesday and Wednesday. Snow in the Ohio Valley Today. Cold stays around into April.
Snow through this evening. Cold weather will return next week and may stick around into April.