Area Forecast Discussion
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000 FXUS61 KPBZ 072325 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 625 PM EST Thu Dec 7 2017 .SYNOPSIS... Cold weather continues. Snow showers are likely with a reinforcing cold front on Saturday. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
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The early eve update featured a downward POP adjustment and addition of a "flurries" mention in conjunction with the latest radar and obs. trends. Previous... Non problematic early eve snow showers will end as the supporting disturbance/reinforcing cold front slide eastward. Cold, to neutral temperature advection will support overnight lows about 8 degrees under the averages.
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&& .SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/... Troughing will be the dominant feature through the period. A surface low and associated cold front will cross the forecast area late Saturday afternoon through Sunday morning...resulting in relatively light snow accumulations. Temperatures are expected to remain 5 to 10 degrees below average. && .LONG TERM /SUNDAY THROUGH THURSDAY/... A longwave trough is progged to persist across the Eastern CONUS through the period, as shortwaves rotate through the trough and maintain periodic snow shower chances. Temperatures are expected to average around 10 degrees below seasonal levels most days through the period. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/...
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Scattered light snow showers will linger through the late evening, but the bulk of the moderate showers are departing east/weakening. No additional snow related restrictions are expected. Otherwise, the ceilings will generally remain above 3kft late this evening. An MVFR cloud bank over central Ohio will persist through the late evening, given favorable mid-level temperatures. These could should reach ZZV but will have trouble pushing east at anything more than scattered. Some gradual dissipation of this cloud deck is anticipated near or after midnight. Surface winds will remain out of the west at about 10kts with occasional gusts to 20kts through midnight before waning. Increased mixing Friday afternoon will once again bring west- southwesterly gusts of 20-25kts to the surface. .Outlook... The next chance for widespread restrictions is Saturday afternoon/evening as a shortwave trough approaches and increases chances for snow.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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