Area Forecast Discussion
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547 FXUS61 KPBZ 212308 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 608 PM EST Tue Nov 21 2017 .SYNOPSIS...
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A cold front will bring the next chance for precipitation tonight. Dry weather will follow until the approach of the next front on Saturday.
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&& .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
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No major changes were needed for the early eve update as an approaching cold front will increase precip probabilities to likely and categorical numbers. The cold airmass in the wake of that front is not expected to be deep enough to sustain low level convection/i.e. snow showers for long. Any post frontal snow accumulation should be thus be limited to an inch or less for the I 80 corridor and ridges through the peri-dawn hours.
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&& .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/...
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Surface high pressure under broad upper troughing will then ensure a dry, but cool midweek and Thanksgiving holiday.
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&& .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
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Ensemble forecasts are showing the next cold front dropping through the area on Saturday with fairly weak support for precipitation, followed by the next trough setting up over the Eastern CONUS. Cold weather is thus projected to start the new week.
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&& .AVIATION /23Z TUESDAY THROUGH SUNDAY/...
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Condition deterioration is expected tonight with the encroachment of a cold front. Expect MVFR cigs with rain changing to snow and lcl IFR, especially at FKl and DUJ. Cold advection on nw wind in the wake of the front will maintain MVFR cigs through Wednesday for ports east of ZZV. .Outlook... The next chance for restrictions is forecast with a Saturday cold front.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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