Latest Forecast

A Heat Advisory is in effect through 8 PM this evening. Once again, high temperatures will reach the low-to-mid 90s with dewpoints in the low 70s this afternoon. As a result, heat indices will reach dangerously high levels and peak between 102-104 degrees. Thus, it will be imperative to drink plenty of non-alcoholic beverages, wear lightweight/light-colored clothing, and take frequent breaks from the heat in an air-conditioned room or building to minimize the risk of contracting heat-related illnesses. Avoid strenuous outdoor activities; limit or avoid time in the sun; and never leave children or pets unattended in a vehicle! Eating a diet high in fruits and vegetables can replenish electrolytes and help with hydration, as well. In addition, a cold front will traverse northern MD, southeastern PA and the Lower Susquehanna Valley from west-to-east this afternoon and spark another round of isolated strong-to-severe thunderstorms between 2-7 PM. The storms may produce locally damaging wind gusts up to 60 mph, small hail, lightning and brief, torrential downpours in the hardest-hit locations. Downed trees and power lines, as well as power outages and roof damage, are all expected in a few spots. However, most areas won't receive any rain. Have multiple ways to receive severe weather alerts and warnings, and seek shelter immediately in an interior room or basement if a warning is issued. Be alert for areas of standing water and debris on some roadways during the PM commute. Behind the front, northwesterly winds will usher slightly cooler and much drier air into the region for the start of the weekend. As a result, clouds will decrease tonight, and an area of high pressure will promote sunny skies on Saturday with much lower humidity and highs in the mid-to-upper 80s. After a mainly clear and mild Saturday night, winds will turn southerly Sunday morning and bring more humid air back into the region. Another cold front will sweep through the Commonwealth from Sunday afternoon into Sunday night, interact with the very warm and unstable air mass in place, and spark widespread showers and thunderstorms. Another round of severe weather is expected with threats similar to today, but an isolated tornado or two may also occur.