Area Forecast Discussion
Issued by NWS State College, PA

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FXUS61 KCTP 180038

Area Forecast Discussion
National Weather Service State College PA
838 PM EDT Sat Mar 17 2018

A fair and mainly dry weekend across central Pennsylvania with
temperatures rebounding toward seasonal levels. There is the
potential for snow to kick off astronomical spring Monday night
into Tuesday across south central PA. Otherwise, the pattern
will continue to favor cooler than average temperatures and dry
weather through late week.


Radar returns have dissipated across southern PA late this
afternoon/early this evening. Remainder of central PA is clear
north to mostly cloudy south. A few upstream radar returns may
continue to brush Somerset County, but otherwise any lingering light
precip will shift south of MD line by later this evening as
high pressure builds over the area tonight. Skies will clear out
with another relatively cold night with lows in the low/mid
teens north to mid 20s south.


Sunday will be mostly sunny and dry with temperatures
rebounding to near seasonal averages. Mainly clear to partly
cloudy Sunday night with still chilly for this time of year in
the upper teens north to upper 20s south.


The main weather maker of concern is a low that slides across
the TN Valley and central Appalachians Mon night and moves off
the VA coast on Tuesday. Trend for this storm has been gradually
further south, which will keep biggest impacts along and south
of the Mason/Dixon line. The surface low itself looks to only
deepen by around 5mb as it reaches the coast, with the
associated upper wave opening up as it moves through. This keeps
with the other trend of lowering the threat of accumulating
snow or wintry mix even over the southern portion of CWA, which
matches with the WPC snowfall/ice forecasts. This time of year
with marginal temps, we generally need good precipitation rates
to keep it cold enough to be all snow and so far the indications
are that several days out, this might be hard to come by.

Below normal temps are forecast to persist though mid week with
a moderating trend toward normal readings for the end of the
week into next weekend.

Spring Equinox is Tuesday at 1215 pm EDT.


High pressure and associated dry airmass building into Pennsylvania
will ensure VFR conditions and a diminishing breeze tonight.
Model data continues to support a high confidence of widespread
VFR conditions into Sunday. However, there is a chance of MVFR
stratocu spreading into northern Pa late Sunday evening associated
with the passage of a weak cold front.


Mon...No sig wx expected.

Tue...Snow likely southern Pa, mainly early AM.

Wed...AM light snow possible Laurel Highlands.

Thu...No sig wx expected.


The Spring (Vernal) Equinox will be at 12:15 PM on Tuesday,
March 20. Sunrise in State College, PA will be 7:14 AM and
sunset at 7:23 PM, for a total daylength of just over 12 hours.




NEAR TERM...DeVoir/Steinbugl
SHORT TERM...Steinbugl
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