Notice the NAO is going negative next week; in fact, we have been in a negative NAO most of the summer. Some studies have shown that a negative NAO during the summer means heat in the Northeast, while a negative NAO in the winter means colder, stormy weather. So one can surmise that as the jet starts to migrate south in September that a negative NAO would mean stormy weather for the Northeast which looks to be the case next week.
The system coming out of Texas and the Gulf Coast will bring a lot of rain north late in the weekend and early next week. You can see on the GFS model total rainfall that some areas can pick up 1-3 inches of rain which may cause some minor flooding problems.
Also, the pattern across the Great Lakes and Northeast will feature several pushes of chilly air the next 14 days. I would not be surprise to see snowflakes over the Upper Peninsula of Michigan in the cold pushes.
Storms will be in the Plains through the weekend, and some places may see strong winds and hail.
Severe weather today may feature damaging winds and tornadoes. Look pout Virginia and The Delmarva.
The outbreak of severe weather starts late today and lasts through tonight. Starts over again in the Mid-Atlantic Thursday afternoon.
Severe weather event Wednesday into Thursday could produce numerous tornadoes and wind damage reports.
Heavy storms today and Tuesday. A cluster of storms could bring some nasty weather later Wednesday through Thursday.
Andrea continues to move north up the coast with heavy rains and tornadoes.