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...
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.

&&

.NEAR TERM /THROUGH FRIDAY/...
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.

&&

.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/...
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.

&&

.MARINE...
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.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...NONE.

&&

$$
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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