Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 281428 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1028 AM EDT THU AUG 28 2014 .SYNOPSIS...
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A COLD FRONT WILL WILL DRIFT SOUTH FROM THE AREA THROUGH THE REST OF TODAY. HIGH PRESSURE WILL SHIFT ACROSS THE NORTHERN MID- ATLANTIC TONIGHT INTO FRIDAY...ANCHORING OFF THE COAST INTO THE WEEKEND. A WARM FRONT WILL LIFT NORTH THROUGH THE AREA LATE SATURDAY.
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&& .NEAR TERM /THROUGH FRIDAY/...
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AS OF 14Z...A WEAK ANA-COLD FRONT EXTENDS FROM CNTRL VA TO NC AND IS DRIFTING SOUTH. NORTH/NORTHWEST WINDS GUSTING UP TO 18 MPH THIS AFTERNOON. HIGH PRESSURE CRESTS OVER NEW ENGLAND TONIGHT THEN PUSHES OFFSHORE BY FRIDAY AFTERNOON. SURFACE DEWPOINTS WILL CONTINUE TO LOWER TONIGHT...LEVELING OFF FRIDAY IN THE LOWER TO MID 50S BEFORE LIKELY STARTING TO INCREASE AGAIN FRIDAY EVENING. RESULT WILL BE MOSTLY CLEAR SKIES TONIGHT AND MOSTLY SUNNY SKIES ON FRIDAY. ONLY FLY IN THE OINTMENT MAY BE SOME MORE CLOUDS AND A SLIGHT CHANCE OF AN AFTERNOON OR EVENING THUNDERSTORM NEAR THE HIGHER ELEVATIONS ACROSS THE SOUTHWEST PORTION OF THE CWA.
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&& .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY/... HIGH PRESSURE WILL BE OFF THE NEW ENGLAND COAST FRIDAY NIGHT. A WARM FRONT WILL APPROACH THE CENTRAL FOOTHILLS AND SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE AS WARM AIR ADVECTION MOVES IN ALOFT OVERNIGHT. THE WARM FRONT WILL MOVE THROUGH THE REGION BY SATURDAY AFTERNOON AND FCST MAX TEMPS ARE EXPECTED TO REACH THE LOW TO MID 80S. SHOWERS AND THUNDERSTORMS SHOULD BE CONFINED TO THE HIGHER TERRAIN AND WEST OF THE BLUE RIDGE AS WARM FRONT CROSSES. COVERAGE WILL BE ISO-SCT. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... SOUTHERLY FLOW WILL CONTINUE ACROSS THE MID ATLANTIC AS HIGH PRESSURE STAYS ANCHORED TO THE EAST. FLOW ALOFT WILL BECOME SWLY AS THE SUBTROPICAL RIDGE MOVES OFF THE SE COAST. DISTURBANCES ARE EXPECTED TO MOVE IN THE SW FLOW ALOFT RESULTING IN THE CHANCE OF SHOWERS AND THUNDERSTORMS SUNDAY AFTERNOON. A LEE TROUGH WILL LIKELY SET UP AS WELL LEADING TO A MECHANISM TO INITIATE CONVECTION. THIS SETUP WILL CONTINUE THROUGH THE START OF THE WORK WEEK WITH TEMPERATURES REACHING THE UPPER 80S AND LOW 90S. A COLD FRONT IS PROGGED TO MOVE THROUGH THE REGION TUESDAY. SHOWERS AND THUNDERSTORMS EXPECTED IN THE VICINITY OF THE FRONT. HIGH PRESSURE WILL MOVE INTO THE REGION WEDNESDAY AND THURSDAY LEADING TO DRY CONDITIONS AND TEMPS NEAR NORMAL. && .AVIATION /14Z THURSDAY THROUGH MONDAY/...
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NLY/NWLY FLOW LOOKS TO GUST AROUND 15 KT INTO EARLY AFTERNOON. HIGH PRESSURE WILL LEAD TO LIGHT NORTH WIND WIND OVERNIGHT...SO NO FOG. HIGH PRESSURE MOVES OFF THE COAST FRIDAY AND WINDS AND BECOME SE. WARM FRONT LIFTS NORTH ACROSS THE TERMINALS LATE FRIDAY. SHOWERS AND THUNDERSTORMS ARE POSSIBLE AT THE TERMINALS STARTING SUNDAY WITH THE BEST CHANCE IN THE AFTERNOON AND EARLY EVENING. THIS MAY CAUSE VSBY/CIG RESTRICTIONS.
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&& .MARINE...
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NLY FLOW NOW AROUND 15 KT...SO REMOVED THE SCA HEADLINE. LOCALIZED CHANNELING AROUND 18 KT STILL POSSIBLE THROUGH MIDDAY...SO TAKE CAUTION ON THE WATERS. PRESSURE GRADIENT WEAKENS TONIGHT INTO FRIDAY WITH HIGH PRESSURE BUILDING IN FROM THE NORTH. A WARM FRONT LIFTS OVER THE WATERS LATE SATURDAY...A SMALL CRAFT ADVISORY MAY BE NECESSARY SUNDAY IN BREEZY SOUTHERLY FLOW.
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&& .LWX WATCHES/WARNINGS/ADVISORIES...
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DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE.
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&& $$ SYNOPSIS...BAJ/BPP/HAS NEAR TERM...BAJ/BPP SHORT TERM...HAS LONG TERM...HAS AVIATION...BAJ/BPP/HAS MARINE...BAJ/BPP/HAS

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