Area Forecast Discussion
Issued by NWS Sterling, VA

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FXUS61 KLWX 180759
AFDLWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
359 AM EDT FRI APR 18 2014

.SYNOPSIS...
HIGH PRESSURE OVER NEW ENGLAND WILL STRETCH SOUTHWARD TOWARD THE
MID-ATLANTIC COAST. AN AREA OF LOW PRESSURE AND COLD FRONT MAY
AFFECT THE AREA SATURDAY. A SECOND COLD FRONT LOOKS TO MOVE
THROUGH THE REGION TUESDAY. HIGH PRESSURE WILL BUILD BACK INTO THE
REGION WEDNESDAY.

&&

.NEAR TERM /TODAY/...
AS OF 07Z...1042MB SFC HIGH IS OVER THE CANADIAN MARITIMES WITH A
SFC RIDGE EXTENDING SOUTH DOWN I-95 INTO THE CAROLINAS. ONSHORE FLOW
ACROSS THE LWX CWA WITH OCEANIC LOW CLOUD DECK OVER THE ERN PART OF
THE CWA...ROUGHLY ALONG I-95. HIGH CLOUDS...ASSOCIATED WITH A
DEVELOPING LOW ALONG THE GULF COAST WILL CONTINUE TO STREAM IN FROM
THE SW. STORY OF THE DAY IS THE LOW CLOUD COVER FROM THE EAST AND
THE HIGH CLOUDS THAT WILL FILTER SUNSHINE ACROSS THE REST OF THE
CWA. GENERALLY A COUPLE DEGREES WARMER THAN YESTERDAY WITH THE
AIRMASS CONTINUE TO MODIFY/MODERATE...MAX TEMPS MID 50S EAST OF THE
BLUE RIDGE AND LOW TO MID 60S WEST.

&&

.SHORT TERM /TONIGHT THROUGH SATURDAY/...
TONIGHT...LOW PRESSURE DEVELOPS OVER THE FL PANHANDLE AND DRIFTS
EAST. HIGH CLOUDS WILL BE OPAQUE BY SUNSET WITH A MILD NIGHT...NO
FROST EXPECTED WITH MIN TEMPS UPR 30S IN NRN MD TO AROUND 40F FOR
THE REST OF THE CWA.

SATURDAY...OUTER RAIN BAND FROM LOW TO THE SOUTH SPREADS TOWARD
CENTRAL VA...BUT AS OF THIS TIME SEEMS TO STOP JUST SHORT OF THE LWX
CWA. CLOUDS PERSIST OVER THE AREA...BUT WITH CONTINENTAL AIR COMING
IN FROM THE NORTHWEST...EXPECT A DECENT WARMUP TO THE MID 60S FOR
LOWER ELEVATIONS. SHOULD THE LOW OR RAIN FROM IT SHIFT A BIT NORTH
THE TEMPS WOULD CERTAINLY BE SUPPRESSED.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
HIGH PRES TO THE N WL CONT TO BE IN CONTROL OF THE WX AT THE
START OF THE XTND PD...KEEPING A WELL DVLPD LOW THE WL CROSS NRN
FL WELL TO OUR S. PATTERN SHOULD RMN RLVTLY BENIGN THRU THE 1ST
PART OF THE NEW WK: IT WON`T BE UNTIL TUE THAT THE AREA SHOULD SEE
ANOTHER CHC OF RA WHEN AN UPR LVL SHORT WV/CD FNT LOOK TO BE MOVG
THRU THE RGN. AT THIS TIME THERE DOES APPEAR TO BE A SVR THREAT W/
THIS SYSTEM.

HIGHS IN THE L70S MON AND TUE. LOWS IN THE LM40S MON NRNG...CLOSER
TO 50 TUE MRNG AHD OF THE FNT.

HIGH PRES BLDG BACK INTO THE RGN WED WL LKLY LEAD TO A BRZY DAY.
TEMPS 5-10 DEGS COOLER THAN TUE. LKWISE COOLER ERLY MRNG TEMPS
XPCTD THU MRNG AS THE NEXT HIGH AREA SETTLES OVR THE RGN.

&&

.AVIATION /07Z FRIDAY THROUGH TUESDAY/...
MVFR CIGS DRIFT EAST BUT SHOULD STRUGGLE TO PUSH WEST OF KIAD TODAY.
THESE CIGS SHOULD SCATTER OUT BY THE LATE AFTERNOON. OTW...HIGH
CLOUDS AND A LIGHT ONSHORE FLOW THE BECOMES SLY. LIGHT FLOW AND VFR
TONIGHT...THEN NWLY FLOW AND MID LEVEL CLOUDS SATURDAY WITH RAIN
FROM A LOW OVER GEORGIA STAYING SOUTH OF THE TERMINALS.

IN THE XTND...VFR CONDS XPCTD THE MAJORITY OF THE TIME. BIGGEST
THREAT WL BE A CD FRONT TUE WHICH WL LKLY BRING RW AND THE PSBLTY
OF REDUCED CIGS.

&&

.MARINE...
ELY FLOW 10 TO 15 KT BECOMES SLY BY LATE TODAY...THEN NLY FLOW 10 TO
15 KT ON SATURDAY. RAIN FROM A LOW OVER GA WILL APPROACH MD BAY
WATERS SATURDAY...BUT LIKELY STAY SOUTH.

MAJORITY OF THE TIME IN THE XTND PD WINDS SHOULD BE BLO SCA
VALUES. A CD FRONT MOVG THRU THE WATERS TUE WL LKLY BRING RW.
THEN AS HIGH PRES BLDS INTO THE WATERS WED SCA LVL WNDS CAN BE XPCTD.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...FROST ADVISORY UNTIL 8 AM EDT THIS MORNING FOR MDZ004>007-
     009>011.
VA...FROST ADVISORY UNTIL 8 AM EDT THIS MORNING FOR VAZ036>040-042-
     050-051-501-502.
WV...NONE.
MARINE...NONE.

&&

$$
PRODUCTS...BAJ/WOODY!







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