From MU - the aforementioned front has come through already (at least Lanco)
(1/2) A backdoor cold front moved through the Lower Susquehanna Valley overnight. Behind the front, moist, easterly flow off the Atlantic has caused skies to turn mostly cloudy. The easterly flow and cloudier conditions will persist over the next three days..
(2/2) As a result, high temps will struggle to exceed the upper 70s this afternoon and mid 70s tomorrow. Easterly wind gusts up to 20 mph this afternoon and 25-30 mph Wednesday will make it feel even cooler outside. Beneficial rain comes Wednesday night - Thursday.