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.
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.
High Plains get hit again with heavy rains, severe storms and even snow. The weather should calm down later tomorrow.
Severe weather coverage will be less this week but still active across western Texas.
The pattern has not changed much and that means the severe weather will hit the Plains this weekend.