Over the coming 36 hours high pressure is forecast to take up residence along the Eastern Seaboard while the cold front moves east. Ahead of a cold front, hot air will move east through the Great Lakes and Northeast. Temperatures today will rise well into the 80s today and low to mid 90s tomorrow.
In fact, it’s kind of a race between the hot air and the cold front. Right now, it looks as though the hot air should (barely) arrive before the cold front does. Consequently, we should manage to experience record heat (record for August 31 is 92 set in 1995) tomorrow. The cold front will push south and allow for somewhat cooler air to arrive Saturday and Sunday and eventually stall, or stop moving, somewhere north of the Mason-Dixon Line.
Meanwhile, we’ll be watching where the remnants of Hurricane Isaac travel this weekend. Current indications are that remnant low and its moisture should travel along and west of the Mississippi River through Friday evening and then make a turn east Saturday and should be located over the southern Great Lakes region by Sunday evening. There is a distinct possibility that the tropical moisture associated with the remnants of Isaac may interact with the stalled frontal boundary. If so, the threat for widespread and locally heavier rain will be elevated early next week.
Exactly how the remnant low moves will have a large say as to whether or not we’ll receive any showers or thunderstorms late this Labor Day weekend into early next week.