Synopsis:
High pressure will continue to build over the region through Thursday bringing warm and dry conditions. A warm front will threaten to bring scattered showers across the state for Thursday night and Friday. A low-pressure system to the west will move northeast as its cold front will stall on the east coast and affect the region Sunday afternoon into the beginning of next week bringing more widespread showers.
Short Term: (Tuesday night through Thursday night)
High pressure along the east coast will continue to dominate and bring beautiful fall weather across PA. High temperatures could reach the mid 80's on Wednesday in southern portions of the state and low temperatures are likely to remain in the 50's for much of the state Wednesday night, indicated by the 18Z 12km NAM. Expect a chance for some fog in the valleys. A warm front will approach the region Thursday night and bring scattered showers throughout the day Thursday. Both 18Z NAM and GFS are spotty with the showers, especially on Friday.
Long Term: (Friday into the weekend)
Scattered showers will be widespread Friday and exit the state by late Friday night. The state will remain in the warm sector and warm air advection should keep temperatures warm on Saturday. The low-pressure system to our west will make its way northeast into Canada and the associated cold front will move east across the state. The 18Z GFS has the frontal precipitation reaching the western counties by 18Z Sunday. The front will make its way across the state but stalls on the east coast, which could enhance the total amount of precipitation we get from the system from Sunday night into the beginning of next week.
~ A.J. Herbert
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