Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 011959 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 259 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 TONIGHT/... Remaining breezy through early evening with wind gusts up to 25-30 mph across the northen half of the area (slightly higher across N MD)...as pressure gradient remains tight between low pressure moving off the NE coast and building high pressure currently centered over Louisiana. Winds should weaken shortly after sunset as atmosphere decouples. Lows tonight generally in the 30s...with upper 20s in the typically colder locations. Upslope flow could lead to some very light snow along the Allegheny Front...little-to-no accumulations expected. && .SHORT TERM /FRIDAY 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 /19Z THURSDAY 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... SCA continues until 6 PM...as pressure gradient remains tight between departing low and building high. While winds just of the surface are expected to remain elevated tonight...expectation is that sfc winds should weaken as atmosphere decouples after sunset. Increased mixing will allow SCA winds to return Friday...with a SCA Advisory in effect from 7 AM through 6 PM. Another SCA will likely be needed 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. Winds expected to remain below the small craft advisory criteria between Sunday and Monday. A period of gusty winds possible on Tuesday. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...Small Craft Advisory until 6 PM EST this evening for ANZ530>543. Small Craft Advisory from 7 AM to 6 PM EST Friday for ANZ530>543. && $$ SYNOPSIS...MSE NEAR TERM...MSE SHORT TERM...MSE LONG TERM...IMR AVIATION...IMR/MSE MARINE...IMR/MSE

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