Area Forecast Discussion
Issued by NWS Sterling, VA

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981 FXUS61 KLWX 200116 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 916 PM EDT Mon Jun 19 2017 .SYNOPSIS...
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A cold front will cross the area tonight. Weak high pressure will build over the area for the middle of the week. The next frontal system will approach from the northwest on Friday.
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&& .NEAR TERM /THROUGH TUESDAY/...
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All watches have been canceled across the Sterling CWA. The threat for flooding is over. Thunderstorms have moved east of Interstate 95 this evening. A wind shift will move through the Mid-Atlantic region by Tuesday morning. Southerly winds and dewpts in the low 70s are still across much of the region this evening. Lower dewpts are back across the Ohio Valley and will slowly advect into the region overnight. Cloud cover is still present across much of the Mid- Atlantic region this evening. Clouds should clear from west to east overnight as drier air advects in and winds should stay slightly elevated overnight. Widespread fog development is not expected however if clearing occurs and winds subside than fog is likely. Will need to monitor situation through the evening. Wind shifts west behind the front with drying conditions. Min temps upper 60s inland to low 70s urban/east of I-95.
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&& .SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/... An upper trough persists north of the area Tuesday into Thursday. Weak surface high pressure will build over the area with dry conditions and near normal temperatures. && .LONG TERM /THURSDAY THROUGH MONDAY/... Low pressure over the Gulf will move ashore late in the week/perhaps Wednesday night. Moisture from that will combine with a cold front approaching from the NW over the Mid-Atlantic Thursday night into Saturday. The cold front may not cross the area until Saturday night or Sunday. && .AVIATION /01Z TUESDAY THROUGH SATURDAY/...
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VFR conditions expected through Tuesday. S-SW winds will become W by Tuesday morning. Patchy fog can not be ruled out especially near MRB-CHO-IAD this evening prior to dry air moving in. West winds increase with gusts around 20 kt through Tuesday. High pressure persists Wednesday into Thursday. Tropical moisture looks to return ahead of a cold front Friday into Saturday.
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&& .MARINE...
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Showers and isolated thunderstorms continue on the waters this evening. Activity will continue to weaken this evening before moving east of the waters by midnight. Southerly winds will continue on the waters before a cold front moves through by Tuesday afternoon. A SCA is in effect for the lower Tidal Potomac and Chesapeake Bay south of Sandy Point overnight. Westerly winds are expected on Tuesday. A few gusts may come close to SCA criteria Tuesday afternoon however confidence is low to issue a SCA at this time. Next cold front Friday into Saturday.
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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 9 PM EDT this evening for ANZ530- 531-535-536-538-539-542. Small Craft Advisory until 6 AM EDT Tuesday for ANZ532>534-537- 540-541-543.
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&& $$ SYNOPSIS...BAJ NEAR TERM...BAJ/HSK SHORT TERM...BAJ LONG TERM...BAJ AVIATION...BAJ/HSK MARINE...BAJ/HSK

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