The weather will remain fairly active for the Western portion of the state on Wednesday with a decent amount of rain moving through the area. The Eastern part of Pennsylvania will remain mostly dry with the exception of a shower or two in the afternoon Wednesday. Thursday looks to be a day of clearing for most of the state setting up for a very nice day on Friday. The weekend looks to be pleasant but the possibility of a shower or thunderstorm cannot be ruled out.
Discussion:
We will continue to be under the influence of frequent, shortwave disturbances rotating around the dominant high in the central US. These pockets of energy will eject over the Ohio River Valley from the Great Lakes region, inducing strengthening surface lows and the chance for strong/severe thunderstorms in portions of western PA tomorrow night. The atmosphere looks to stabilize a bit from Thursday through the beginning of the weekend with some 500mb NVA, low 700mb RH, and general descent. A shortwave disturbance could bring some scattered showers Friday night, but the weekend will be a great one with a relatively dry, seasonal airmass settling into place. In the long term, a possible cold front situation is setting up on the ECMWF and GFS for Monday afternoon. This is definitely something to look at.
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