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Old 05-15-2016, 04:56 AM
Cambium
 
Location: Near the Coast SWCT
74,457 posts, read 57,940,133 times
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From NWS Central PA. Impressive. Been 3 decades since having this type of air mass in May

Quote:
Weather conditions in central Pennsylvania over the next 24 hours
will likely be the coldest until next fall. Temperature departures
will average between 15 and 25 degrees below normal on Sunday and
10 and 15 degrees below normal overnight Sunday into Monday morning.
Here is a look at the daily record low maximum and record minimum
temperatures

An extensive...broken overcast deck of strato cumulus blankets most of the CWA
early this morning...thanks to a well-aligned wnw boundary layer
flow and increasingly colder airmass streaming across the chilly
(but still relatively warmer waters of lake erie).

This is one of...if not the coldest air masses for mid may to
impact our region in the past 30 years. Upstream 850 mb temps of
-6 to -8C and sfc high pressure drifting to our south across the
Middle Ohio River Valley and Central Appalachians over the next
24-36 hours will help to maintain widespread clouds across central
and nw penn with lake effect rain showers scattered across the
central ridge and valley region of the state...and more numerous
nocturnal snow showers/rain showers across the Allegheny Plateau
of northern and western PA. Lake Erie - 850 mb temp spread will
increase to about 16-17C for much of today.

Briefly moderate snowfall rates and morning temps in the low-mid 30s
at KJST and KBFD will lead to the potential for a light coating
of snow...and perhaps up to one half of and inch in a few spots
across Mckean and Potter Counties at elevations above 2200 ft
msl.
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