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.
The bulk of the severe storms will stay on the High Plains today and Tuesday.
Severe weather will hit the Upper Midwest and southern Canada. It could be a tornado day!
Another big day for severe weather. Damaging winds and even a few tornadoes possible today.
Two major days of severe weather. First day in the Ohio Valley and the second day in West Virginia and Virginia.
Two potential nasty days of severe weather due to a highly unusual strong jet stream moving through,
A series of fronts moving acorss the East will cause severe storms.