Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 011441 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 941 AM EST Thu Dec 1 2016 .SYNOPSIS... Low pressure is tracking into eastern Canada. A cold front has moved off the east coast. High pressure will move into the region Friday and Saturday. Low pressure will track to the west of the region Sunday night. High pressure returns Monday into Tuesday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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Breezy through early evening with wind gusts up to 25-30 mph...as pressure gradient remains tight between low pressure moving off the NE coast and building high pressure currently centered over Louisiana. Mostly sunny across much of the area...with the exception being across the higher terrain...where westerly flow is allowing for the formation of mountain wave clouds (evident in visible satellite imagery). Forecast highs range from the mid 50s- low 60s east of the Blue Ridge (slightly above normal) to the low 40s-low 50s west of the Blue Ridge (near normal). Upslope flow could lead to some very light rain/snow along the Allegheny Front...no accumulations expected.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/... High pressure will build into the area for the next 48 hours. No chances for precipitation. Lows will drop into the lower 30s over much of the area...a little warmer from I-95 east...colder in the Highlands. Highs primarily in the upper 40s/lower 50s. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... High pressure will gradually build into the region Saturday night keeping dry conditions and seasonably cold temperatures. A weakening system will approach the area late Sunday and Sunday night, bringing increasing clouds during the day Sunday and the chance for some light precipitation late Sunday and Sunday night, with the potential for some frozen precipitation in northern/western areas. A ridge of high pressure will then build in to start the work-week Monday, but it will be short-lived. A large upper level trough will begin to carve out across the western half of the United States, establishing a deep southwest flow out ahead of it. This will help eject a system out of the southern plains and towards the Mid- Atlantic states in the Monday night - Wednesday time period bringing with it increasing chances of precipitation. While likely mostly rain across the coastal plain, with high pressure established over the northeastern US, there is the chance for some frozen precipitation in northern/western areas. Highs during the period generally 40s to low 50s, and lows in the 20s to 30s. && .AVIATION /14Z THURSDAY THROUGH MONDAY/... VFR today through Saturday. Generally VFR expected Saturday night through Monday. There may be some light rain showers late Sunday and Sunday night that may bring brief sub-VFR conditions. && .MARINE...
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With cold front pushing offshore high pressure is building into the waters. Winds will gust throughout the day. SCA in effect for all waters today. These should diminish overnight but re-energize Friday. Another SCA will likely be needed before abating Friday night and Saturday. SCA conditions possible Saturday night with northwest winds gradually subsiding. Sub-SCA conditions then expected Sunday and Monday.
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&& .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. && $$ UPDATE...MSE PRODUCTS...WOODY!/MJM

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