Area Forecast Discussion
Issued by NWS Sterling, VA

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000
FXUS61 KLWX 290554
AFDLWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
154 AM EDT TUE JUL 29 2014

.SYNOPSIS...
HIGH PRESSURE WILL BUILD OVERHEAD THROUGH MIDWEEK...BRINGING
PLEASANT WEATHER. A TROUGH OF LOW PRESSURE MAY DEVELOP TOWARD THE
END OF THE WEEK.

&&

.NEAR TERM /THROUGH TODAY/...

HIGH PRES BLDG INTO THE MID ATLC OVERNIGHT. AT 2 AM AMAZINGLY
PLEASANT OUTSIDE FOR JUL 29 - CLR SKIES...TEMPS IN M60S...DWPTS IN M50S.

UPPER LOW WILL PERSIST TUESDAY AS SURFACE HIGH PRESSURE MOVES
INTO THE REGION. NRLY WINDS WILL CONTINUE BRINGING UNSEASONABLY
COOL TEMPS TO THE MID-ATLANTIC. FCST MAX TEMPS IN THE MID TO UPPER
70S ARE EXPECTED.

&&

.SHORT TERM /TONIGHT THROUGH WEDNESDAY/...

COOL CONDITIONS ARE EXPECTED TONIGHT INTO WEDNESDAY AS HIGH
PRESSURE NEARS AND WINDS RELAX. FCST MIN TEMPS TUES NIGHT RANGE
FROM THE UPPER 40S TO LOW 50S IN THE MTNS TO THE UPPER 50S NEAR
INTERSTATE 95.

HIGH PRESSURE PERSISTS ACROSS THE AREA WEDNESDAY. A FEW SHOWERS
ARE POSSIBLE ACROSS THE POTOMAC HIGHLANDS WEDNESDAY AFTERNOON AS A
DISTURBANCE MOVES AROUND THE UPPER LEVEL LOW. TEMPS WILL BE
BELOW NORMAL BARELY REACHING 80 DEG.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
HIGH PRESSURE OFFSHORE SETS UP WEAK RETURN FLOW FOR THURSDAY AS
LARGE COLD-CORE UPPER  LOW OVER THE GREAT LAKES TO HUDSON BAY
CONTINUES TO DOMINATE THE UPPER AIR PATTERN. MARINE WEDGE LOOKS TO
BE IN PLACE FRIDAY INTO THE WEEKEND AT THE SURFACE WHILE SOUTHWEST
FLOW ALOFT CONTINUES TO DRAW IN MORE DEEP LAYER MOISTURE. WEAK VORTS
IN SOUTHWEST FLOW WILL DAILY CHANCES OF SHOWERS/STORMS IN THE
FORECAST FRIDAY AND THE WEEKEND. THE BEST CHANCE WILL BE
SATURDAY/SATURDAY NIGHT AS POSITIVELY TILTED SHORE WAVE TROUGH LIFTS
NORTHEAST ACROSS THE OHIO VALLEY. ASSOCIATED WEAK COOL FRONT LOOKS
TO PUSH THROUGH OR STALL FROM 00 TO 12Z SUNDAY. DEEP LAYER SHEAR
LOOKS MINIMAL AT THIS TIME...HOWEVER MARGINAL TO MODERATE
INSTABILITY WILL MAKE SOME CONVECTION POSSIBLE. AT THIS TIME...NO
SEVERE WEATHER IS EXPECTED HOWEVER HEAVY RAIN IS A POSSIBILITY.

&&

.AVIATION /06Z TUESDAY THROUGH SATURDAY/...

VFR EXPECTED THROUGH TUESDAY.

PATCHY FOG MAY IMPACT CHO-MRB EARLY WEDNESDAY MORNING. HIGH
PRESSURE OFFSHORE WILL DRAW IN WARMER AND MORE HUMID CONDITIONS
FRIDAY AND THROUGH THE WEEKEND...WHICH WILL RESULT IN DAILY
CHANCES OF THUNDERSTORMS. THE BEST CHANCE WILL BE SATURDAY INTO
SATURDAY NIGHT WITH A COLD FRONT.

&&

.MARINE...

SCA IN EFFECT FOR LOWR TIDAL PTMC AND SRN PART OF MD SXN OF CHES
BAY THRU SUNRISE.

HIGH PRESSURE WILL MOVE INTO THE REGION TUESDAY. NRLY WINDS 5-10
KTS EXPECTED TUESDAY AND WEDNESDAY ON THE WATERS. HIGH PRESSURE
OFFSHORE WILL DRAW IN WARMER AND MORE HUMID CONDITIONS FRIDAY AND
THROUGH THE WEEKEND...WHICH WILL RESULT IN DAILY CHANCES OF
THUNDERSTORMS. THE BEST CHANCE WILL BE SATURDAY INTO SATURDAY
NIGHT WITH A COLD FRONT. SOUTHERLY WINDS LOOK TO REMAIN BELOW
SMALL CRAFT ADVISORY CRITERIA THROUGH THE WEEKEND.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT EARLY THIS MORNING FOR
     ANZ532>534-537-540-541-543.
     SMALL CRAFT ADVISORY UNTIL 2 AM EDT EARLY THIS MORNING FOR
     ANZ535-536-542.

&&

$$
UPDATE...WOODY!
PRVS...BPP/HAS/AEB







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