Synopsis
Another day of sunny skies is in store for the region before a weak cold front dives down from the Great Lakes. Strong cold air advection behind the front will bring in much cooler temperatures through the weekend. A ridge of high pressure will build in behind the front and provide the area with sunny days and clear nights.
Short Term (Through Saturday Evening)
After a round of thunderstorms with isolated hail, most of the activity will dissipate with only a few scattered thunderstorms remaining across Northeast PA. Temperatures are pretty uniform across PA with mid-60s to lower 70s. Clear skies combined with drier air moving into Northwest areas will provide good radiational cooling conditions. Lows in the upper 50s to lows 60s will be prevalent and fog could develop in some of the valley areas during the morning hours. Strong warm air advection ahead of the approaching cold front will allow for temperatures to rise quickly into the mid 80s. The cold front will approach the area during the evening hours with northerly winds ushering in cooler air. However, the 00z NAM and SPC WRF indicate the convection will hold off into the early morning hours on Saturday. This rain should continue through the day on Saturday. SREF output shows precipitation totals of 1/2 inch across southern areas to near 1 inch across northern regions. The precipitation should taper off towards the evening hours leaving mostly cloudy skies.
Long Term (Sunday morning through Tuesday)
A ridge of high pressure will build into the region Saturday night. Mostly sunny skies and clear skies will be the norm. GFS MEX has high temperatures in the upper 60s to lower 70s across much of the commonwealth. It will feel like fall and will be a welcomed sight. Each night will feature prime radiational cooling conditions will lows dropping into the upper 40s across Erie and Bradford. This ridge of high pressure should stick around through Tuesday according to the GFS/ECMWF models.
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