Latest Forecast

Southwesterly winds of 10-20 mph will usher unseasonably warm and humid air back into northern MD and southeastern PA today. High temperatures will be around 15 degrees above average again with dewpoints in the mid-to-upper 60s. However, a powerful cold front will put an abrupt end to the warmth this evening and also be accompanied by heavy, gusty showers. The most intense showers will produce brief downpours and locally damaging wind gusts up to 60 mph between ~3-8 PM. Tree and powerline damage, as well as isolated power outages, may occur in the hardest-hit areas. Behind the front, north-northwesterly winds of 12-25 mph with gusts up to 35-40 mph will usher a dramatically cooler and drier air mass into the Lower Susquehanna Valley for the start of the weekend. In stark contrast to today, high temperatures will be around 10-15 degrees below average on Saturday and only in the low-to-mid 50s. Clouds will gradually decrease throughout the day, and skies will then be clear from Saturday night into Sunday. A high pressure system of Canadian origin will settle into the Commonwealth during the second half of the weekend and promote lighter winds and a continuation of unseasonably cool conditions on Sunday.