-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KLWX 181939
AFDLWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
339 PM EDT TUE JUN 18 2013

.SYNOPSIS...
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A WEAK LOW MOVES WILL CONTINUE TO MOVE EAST ACROSS THE SOUTHERN
MID- ATLANTIC THROUGH THE EVENING HOURS. A WEAK COLD FRONT WILL
SAG SOUTH THROUGH THE AREA THIS EVENING INTO THE OVERNIGHT. HIGH
PRESSURE WILL BUILD BEHIND THIS FRONT LATE TONIGHT THROUGH
WEDNESDAY....REMAINING OFF THE NORTHERN MID- ATLANTIC SHORE
THROUGH THIS WEEKEND.
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&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
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FLASH FLOOD WATCH RETRACTED FOR MUCH OF THE AREA...REMAINING UNTIL
6PM FOR AREAS I-95 AND EAST...AS WELL AS CNTRL VA.

AS OF 19Z...ONE FRONTAL BOUNDARY NOW MOVING SOUTHEAST FROM
N-CNTRL VA AND SRN MD. THIS TAKES THE HEAVY RAIN AND WIND THREAT
TO THE BAY. TRENDS SUGGEST THIS THREAT SHOULD LAST ONLY ANOTHER
HOUR OR SO. SFC LOW PRESSURE WILL CONTINUE TO DEVELOP AS IT MOVES
ACROSS SERN VA THROUGH THIS EVENING...DRAWING ACTIVITY FARTHER
SOUTHEAST.

EVENING TEMPS MILD WITH DEWPOINTS IN THE UPR 60S TO LOW 70S. WILL
NEED TO MONITOR THE SCT TSRA OVER ERN OH/I-70. HOWEVER...WEAK STEERING
FLOW WILL KEEP THIS ACTIVITY AWAY FROM THE POTOMAC HIGHLANDS FOR
AT LEAST A COUPLE MORE HOURS...ENOUGH TO DROP THE FLASH FLOOD
WATCH FOR NOW.

TONIGHT...BOUNDARY SAGS SOUTH FROM THE MASON-DIXON. PLENTY OF
MOISTURE AROUND FOR SHOWERS REDEVELOPMENT IN SPITE OF LACK OF
HEATING. DRIER AIR BEHIND THIS BOUNDARY SHOULD ENABLE MIN TEMPS IN
THE UPR 50S WEST OF THE BLUE RIDGE TO LOW TO MID 60S EAST.
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&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH 6 PM WEDNESDAY/...
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SFC HIGH BUILDS ACROSS THE NRN MID-ATLANTIC...PUSHING FRONTAL
BOUNDARIES SOUTH. LIGHT N FLOW WILL KEEP TEMPS BELOW
NORMAL...EXPECT HIGHS IN THE UPR 70S TO AROUND 80F. DRY AND MOSTLY
SUNNY.
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&&

.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
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NEAR NORMAL TEMPS IN RETURN FLOW MIDWEEK THROUGH THE WEEKEND.
ISOL/SCT AFTERNOON THUNDERSTORM ACTIVITY IN THE TERRAIN WEST FROM
THE BLUE RIDGE EACH DAY. LOW PRES WL BE EXITING THE CST WED MRNG W/
HIGH PRES BLDG IN FM THE UPR MIDWEST. VERY PLSNT DAYS/NGTS XPCTD
WED AND THU W/ HIGHS IN THE L80S..LOWS RANGING FM THE M50S IN THE
HIGHLANDS TO THE M60S IN THE CITIES.
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&&

.AVIATION /20Z TUESDAY THROUGH SUNDAY/...
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MOD SHRA FOR THE TERMINALS TAPERS OFF INTO THE EVENING HOURS AS
THUNDERSTORM CHANCE MOVES EAST ACROSS THE CHESAPEAKE BAY. FRONTAL
BOUNDARY WILL CONTINUE TO PUSH SOUTHEAST THIS EVENING.

VFR CONDS AND LIGHT FLOW EXPECTED OUTSIDE OF POTENTIAL MORNING FOG
THROUGH THE WEEKEND.
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&&

.MARINE...
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SHOWERS AND THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS INTO THE
EVENING HOURS. NORTH WINDS OCCUR BEHIND A WEAK COLD FRONT TONIGHT
BUT ARE EXPECTED TO ALSO REMAIN BELOW SCA.

WINDS XPCTD TO RMN BLO SCA VALUES THROUGH THE WEEKEND.
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&&

.LWX WATCHES/WARNINGS/ADVISORIES...
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DC...FLASH FLOOD WATCH UNTIL 6 PM EDT THIS EVENING FOR DCZ001.
MD...FLASH FLOOD WATCH UNTIL 6 PM EDT THIS EVENING FOR MDZ007-011-
     013-014-016-018.
VA...FLASH FLOOD WATCH UNTIL 6 PM EDT THIS EVENING FOR VAZ025-036-
     037-050>056-502.
WV...NONE.
MARINE...NONE.
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&&

$$
JACKSON