Technical Discussion

Synopsis:

High pressure will build across the region tonight, allowing winds to gradually diminish. Light winds and mostly clear skies tonight will allow temperatures to dip into the 30's across much of the state. A frost advisory is currently in place for Southeastern PA through tonight. The next storm looks to move into Western counties early Friday, bringing the possibility of snow showers across the central and northern mountains. Clouds, rain, and above average temperatures look to remain in the forecast through the weekend and into the early part of the next work week.

Short Term:

Building ridge of high pressure across the region tonight will gradually suppress gusty winds. The combination of light winds, dry air mass, and mostly clear skies tonight will allow temps to dip into the 30's across much of the state. NWS has issued a Frost Advisory for SE counties through the overnight. The next system looks to move into western zones by 15z Friday morning. CAD in northern and eastern counties may allow precipitation to begin as snow before changing over to all rain. 0900 UTC SREF's indicate that the bulk of this precipitation Friday will hug the Mason Dixon line. We can't rule out the chance for stray thunderstorm, especially in the western half of the state. A second, heavier batch of precipitation will move across the state early Saturday.

Long Term:

One storm after another will continue to eject out of the Great Plains through the weekend. Clouds accompanied with rain showers will remain in the forecast into the next work week. Total QPF for the 5-day forecast period ranges from ~1" in SE counties while locales in the NW may receive over 3" of rainfall. Temps look to continue to hang in the 60's over the weekend, with milder air working in by Monday when many locations will be looking at highs in the 70's.

 

Christopher Cornwell