For the Northeast into the southern Ohio Valley, today will be a northwesterly flow severe weather outbreak. What is a NW Flow Severe Weather Outbreak? It's where the jest stream is from the NW aloft and winds at the surface are from the SW. Warm and humid air is transported under the jet resulting in a very unstable atmosphere. In addition, you have shear that develops between the SW winds and NW winds aloft which may support supercell thunderstorms and the potential for tornadoes.
While I think the main impacts will be wind damage and hail, I do think we can see a few tornadoes across Pennsylvania, West Virginia, southern Ohio, Kentucky and perhaps even parts of Virginia.
I did see while writing this that SPC extended the slight risk into the big cities.
More rainfall for the Plains but the pattern is going to change over the weekend. Should dry out some.
This will be an active day for severe weather with storms in the East and High Plains.
Heavy storms today across western Texas and the Ohio Valley. Video, I talk about how the pattern is going to change
The weather will be severe across the Plains this weekend as thunderstorms with hail, damaging winds, tornadoes and flooding rains develop.
Severe storms will develop across the eastern Carolina's today. Active severe weather pattern in the Plains this weekend.
Pattern continues to produce storms across Texas and the High Plains into the Holiday weekend. Eastern Carolina's get hit Thursday.