Friday 9 a.m.
Warmer air is moving into the I-95 corridor today, but two cold fronts will cause the temperature to step down this weekend, with the chilliest day likely to be Monday. The first front offers the best chance for showers and thunderstorms overnight and during tomorrow, but we don't expect steady rain. Some warming is likely by the middle of next week, especially from Pennsylvania on south.
Here is the Northeast video
This video targets Chicago.
With the upper-air steering winds coming from central Canada, chilly air will advance into the Northeast.
Labor Day is a week from Monday. The computer model used here, the GFS ensemble mean, suggests the weather will favor outdoor late summer activities across the Great Lakes and Northeast:
In response to heating at ground level and a weak cold front approaching from the west, showers and locally strong thunderstorms should develop across northern Ohio this afternoon.
... much greater interest is being generated on threats and rumors about tropical storms. It is worthwhile to read Dan Kottlowski's authoritative reports on this. Here is a copy of his map from this morning:
The tropical Atlantic shows signs of life in the storm development department. Dan Kottlowski's expert discussion suggests the third storm (which could be Hermine) of current concern is one that could head to the Bahamas, Florida, the Gulf or ???
A large high pressure area centered just south of Chicago will furnish a northwesterly of pleasantly cool and dry air to the eastern Great Lakes and all of the Northeast today into Tuesday.
As the trough moves through each locality, warm humid weather will be followed by showers and thunderstorms, then cooler an drier air will arrive