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.
Severe weather will rip across the Northern Plains today. Parts of Canada may see tornadoes.
Severe weather will be the focus the next couple of days. Tornadoes may hit western Canada.
Heavy thunderstorms to bring some locally damaging wind gusts. Tornadoes for Canada! It's the season for them!
A cluster of thunderstorms or perhaps an Derecho will produce a swath of damaging wind gusts across North Dakota into northern Minnesota.
The rains are underway across Texas so watch the flooding. Sniffing out a storm development along the East Coast.
Storms will develop over the Southern Plains and will bring damaging winds and flash flooding rains.