Latest Forecast

An early-season heatwave will bake the Lower Susquehanna Valley through the middle of the week. A massive ridge, or northward bulge in the Jet Stream, centered along the Eastern Seaboard will be the culprit for the record-breaking heat. Under mostly sunny skies, high temperatures will soar into the low-to-mid 90s this afternoon and mid-to-upper 90s on Tuesday. In fact, the May 18th and 19th record high temperatures of 95°F from 1962 at Millersville University will be challenged, tied or perhaps even broken. Fortunately, humidity will not be oppressively high during the heatwave, so heat indices should be similar to the actual air temperature. However, we have had virtually no time to acclimate to the heat. Thus, it will be imperative to drink plenty of non-alcoholic beverages, take frequent breaks from the heat, and wear loose-fitting/lightweight clothing early this week to reduce the risk of heat-related illnesses. Never leave children or pets unattended in a vehicle, either, as its internal temperature can reach 120°F in just 10-15 minutes on a 95-degree day. After a mainly clear and warm Tuesday night with lows around 70°F, clouds will increase on Wednesday ahead of a potent cold front. Scattered showers and thunderstorms will then erupt along and just ahead of the front Wednesday afternoon and evening. Severe weather is not currently anticipated, but the most intense storms may produce frequent lightning, locally heavy downpours and wind gusts up to 45 mph.