Latest Forecast

A series of disturbances diving southeastward through the Commonwealth will bring more rounds of showers and thunderstorms to the Lower Susquehanna Valley through Friday night. Storms should be most intense and widespread tonight and again Friday evening. The main threats from the storms will be frequent lightning, torrential downpours, flooding of low-lying, urban-, and poor-drainage areas, and locally damaging wind gusts up to 60 mph. Downed trees and powerlines, as well as power outages and roof damage, may occur in the hardest-hit locations. Winds will turn west-southwesterly again this afternoon and usher unseasonably hot and humid air back into the region. High temperatures should reach the upper 80s to low 90s with dewpoints in the low-to-mid 70s and peak indices of 100-102 degrees. A Heat Advisory is in effect until 8 PM this evening. Drink plenty of non-alcoholic beverages and take frequent breaks from the heat in an air-conditioned room or building to stay hydrated and cool. Never leave children or pets unattended in a vehicle! A cold front will move through northern MD and southeastern PA later Friday night into Saturday morning. Behind it, northerly winds of 8-16 mph will usher much cooler, drier, and less humid air into the region for the start of Labor Day weekend. Under mostly sunny skies, high temperatures will be back around average on Saturday with dewpoints in the low 60s.