Area Forecast Discussion
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000 FXUS61 KPBZ 061032 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 532 AM EST Wed Dec 6 2017 .SYNOPSIS... Mainly dry and colder than seasonal average weather is expected until snow shower chances return with a Saturday cold front. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Patchy stratocu should continue to erode early this morning as cold advection ends. Broad upper troughing should continue across the Eastern CONUS today. Clouds should increase this afternoon mainly N of I 70 as a weak wave rotating through the main trough approaches. Gusty WSW winds should be maintained today by a tight pressure gradient and mixing. Highs should be near or just below the seasonal averages. && .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY NIGHT/... Patchy stratocu is expected to persist tonight as the weak wave crosses/exits, and cold advection returns behind it. The upper trough is expected to persist across the Eastern CONUS through the period as it gradually deepens, keeping colder than average temperatures and variably cloudy conditions. The boundary layer wind should remain WSW-SW keeping lake enhancement N of our area, though the flow could back enough to the west Thursday to graze areas N of I 80 with a few snow showers. && .LONG TERM /SATURDAY THROUGH TUESDAY/... Longwave troughing is progged to persist across the Ern CONUS through the period. Shortwaves rotating through the trough should maintain periodic precip chances, with the best chance on Saturday with a digging shortwave. Temperatures are expected to average below seasonal levels. && .AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
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VFR conditions will continue through the TAF period. Mostly clear skies will be in place to start, but another round of VFR strato/altocumulus will arrive with upper troughing later this afternoon and persist through tonight. The main issue will be the wind, which will become gusty again later this morning. Peaks of 15 to 25 knots can be expected out of the southwest starting by late morning. Gusts will start to diminish this evening. .Outlook... The next chance of widespread restrictions may arrive by Saturday with low pressure.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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