Synopsis:
High pressure will build over the region for the remainder of the week into the first half of the weekend providing pleasant fall weather with cool nights and normal high temperatures. A coastal low could possibly threaten the far eastern portions of the state with scattered showers on Sunday into Monday, and a cold front from the west will make its way across the region bringing scattered showers Monday evening into early Tuesday.
Short Term (Tuesday night through Wednesday night):
Calm winds at night and clear skies will provide cool temperatures in the low to mid 30's for higher elevations allowing for some widespread frost to form Tuesday Night. Also expect fog to form Wednesday and Thursday morning as temperatures cool to their dew points. Wednesday will be another day of beautiful fall weather after a cool night as high pressure sits over PA. Temperatures are likely to reach the low to mid 70's in southern counties of the state and mid to upper 60's elsewhere Wednesday indicated by the 18Z 12km NAM.
Long Term (Thursday into the weekend):
High pressure will continue to sit over the state Thursday through Saturday providing more pleasant weather with clear skies and calm winds. A coastal low will attempt to throw some moisture towards eastern portions of PA late Sunday into Monday but the 18Z GFS is not showing a chance of it reaching the state. A slow moving cold front will finally make its way across the state Monday into Tuesday bringing some wide spread showers as the long-lived ridge of high pressure finally moves off the coast.
~ A.J. Herbert
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