Synopsis
A ridge of high pressure will slide easterly overnight. A slow moving
warm front will push across Pennsylvania Thursday and Friday. A cold
front will approach the State late Saturday and hang overhead through
Sunday.
Short Term (Through Friday Morning):
A shearing upper trough will begin to cross over the state this
afternoon causing varying amounts of mid and high cloud cover.
There is a slight chance of precipitation in some locations. Increasing cloud cover and dew points will result in a milder night
across the North West Mountains. Clear skies, light wind and dry air
associated with the lingering influence of high pressure along the east
coast should result in another cool night across the Eastern half
of the state. The warm front over Western PA will be the focus
for scattered afternoon to night convection on Thursday. High
temperatures Thursday will be fairly uniform ranging between
80-85F, accompanied by increased humidity.
Long Term (Through Tuesday)
A deep south wet flow ahead of the low will transport warm and humid air into the region
Saturday and Sunday. Conditions will likely turn more Autumn-like by
Labor Day. Friday looks to be mainly rain free as an upper level
ridge acts to suppress convection. Saturday looks to be the warmest
day of the weekend as a flow becomes south west behind the warm front.
Some locations across Southern PA will likely approach 90F. Sunday looks
to be a transition day as a cold front approaches. Colder temperatures
will likely yield an increased chance of cloudiness. Highs will
most likely range from the upper 60s to upper 70s in some partssuch as the lower Susquehanna Valley.
Forecaster: Meredith Nichols
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