Area Forecast Discussion
Issued by NWS Sterling, VA

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555 FXUS61 KLWX 020157 AAA AFDLWX Area Forecast Discussion...UPDATED National Weather Service Baltimore MD/Washington DC 857 PM EST Thu Dec 1 2016 .SYNOPSIS... High pressure will gradually move into the region tonight through early next week. Disturbances will cross the area late Sunday and again Tuesday. && .NEAR TERM /THROUGH FRIDAY/...
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Cyclonic flow and tight pressure gradient will maintain brisk conditions through the night. Due to strength of the flow, clouds have made it well east of the Appalachians. Given extensive cloud cover and strength of winds do not longer foresee much decoupling tonight except in cntrl VA where gradient is weakest. We`ll be making some adjustments to clouds and temperatures tonight. Will also increase PoPs somewhat for the mountains with a little snow accumulation.
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&& .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/... High pressure will continue to gradually build into the area as we head into the weekend...with dry weather continuing. Breezy winds expected during the day Friday and Saturday once mixing commences. Winds abate in most places after sunset. Seasonable high/low temperatures expected. && .LONG TERM /SUNDAY THROUGH THURSDAY/... High pressure lingers near the Mid-Atlantic Sunday as an upper level shortwave trough approaches from the west, increasing the chance of precipitation late Sunday into Monday. High pressure builds briefly on Monday as a low pressure system lifts from the Gulf states into the Great Lakes area Monday into Tuesday night with its associated fronts increasing the chance of precipitation in our CWA. Dry conditions Wednesday before a strong cold front approaches from the west Thursday. High temperatures will be in the 40s and 50s.. with some 30s at higher elevations. Lows temperatures will be in the 20s to 30s on Sunday and Monday nights, which could allow for some frozen precipitation...and in the 30s and 40s on Tuesday and Wednesday nights... with some 20s and higher elevations. && .AVIATION /02Z FRIDAY THROUGH TUESDAY/... VFR through Saturday as high pressure builds into the area. Gusty westerly winds up to 20kts are possible during the day Friday and Saturday. Dry conditions mainly for Sunday into Monday, with some showers possible Sunday night, as an upper level disturbance moves across the region. A storm system could bring additional precipitation Monday night into Tuesday night. Sub-VFR conditions possible Sunday night, and Monday night into Tuesday. && .MARINE...
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Don`t foresee much decoupling tonight and have kept SCA for most of the waters for tonight. SCA conditions are likely to continue through Sunday. Dry conditions mainly for Sunday into Monday, with some showers possible Sunday night, as an upper level disturbance moves across the region. A storm system could bring additional precipitation Monday night into Tuesday night. Winds expected to remain below the small craft advisory criteria between Sunday night and Monday. A period of gusty winds possible on Tuesday.
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&& .LWX WATCHES/WARNINGS/ADVISORIES...
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DC...None. MD...None. VA...None. WV...None. MARINE...Small Craft Advisory until 6 PM EST Friday for ANZ530>534- 536>543. Small Craft Advisory from 7 AM to 6 PM EST Friday for ANZ535.
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&& $$ SYNOPSIS...MSE NEAR TERM...LFR SHORT TERM...MSE LONG TERM...IMR AVIATION...IMR/MSE MARINE...IMR/MSE

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