Area Forecast Discussion
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000 FXUS61 KPBZ 130411 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1211 AM EDT Fri Oct 13 2017 .SYNOPSIS...
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Building high pressure should maintain mainly dry weather through Saturday. A cold front will return shower chances for Sunday.
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&& .NEAR TERM /UNTIL 6 AM THIS MORNING/...
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Areas of stratus and stratocu are expected to continue tonight with low level moisture in place under a temperature inversion, despite building shortwave ridging. Upslope SE flow across the ridges should also maintain fog and drizzle through the night. On the W side of the ridges, the downsloping SE flow should erode at least some of the clouds. Lows are expected to average around 10 degrees above seasonal levels.
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&& .SHORT TERM /6 AM THIS MORNING THROUGH SATURDAY NIGHT/... Dry weather and cloud diminishment is forecast through the period under shortwave ridging. Temperatures are expected to gradually increase with readings around 15 degrees above average anticipated by Saturday. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Another trough is forecast to dig over southeast Canada on Sunday and drag a cold front through the region. With rain supporting dynamics projected to rapidly shift away from the region, expecting fairly progressive and short-lived precipitation to accompany the front. A brief cool down can then be expected before building high pressure again moderates temperature by the mid week. && .AVIATION /04Z FRIDAY THROUGH TUESDAY/... Outside of the I 80 corridor terminals, downsloping boundary layer wind and unfavorable condensation pressure deficits are expected to preclude IFR conditions for the period, although areas of MVFR stratus will mar conditions for ports not immediately in lee of the ridges. .Outlook... The next chance for widespread restrictions is expected with a Sunday cold front. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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