FXUS61 KLWX 280839 AAA
AFDLWX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
339 AM EST SAT NOV 28 2009

.SYNOPSIS...
LOW PRESSURE WILL MOVE INTO THE CANADIAN MARITIMES TODAY. HIGH 
PRESSURE WILL BUILD OVER THE REGION TONIGHT INTO SUNDAY. A COLD 
FRONT WILL PASS THROUGH MONDAY...AND HIGH PRESSURE WILL BUILD
OVERHEAD TUESDAY. LOW PRESSURE WILL LIKELY IMPACT THE AREA DURING
THE MIDDLE OF NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
DEEP UPR LOW OVER ERN NEW ENGLAND WILL CONT TO MOVE NEWD TDA. FCST
AREA WILL BE FOUND IN DEEP NWLY FLOW REGIME...WHICH WILL FOSTER
CONTD ADVCTN OF COOL...DRY AIR INTO MID-ATLC TDA.

SUBSIDENCE BEHIND EXITING WAVE WILL PROMOTE CLRG IN MUCH OF FCST
AREA EARLY THIS MRNG. XCPTN WILL BE ON WRN SLOPES OF ALLEGHENY
FRONT...WHERE WNWLY LOW-LVL WINDS WILL HAVE UPSLP COMPONENT.
ACCUMULATING PCPN NOT XPCD WITH CONTG DESCENT OF INVERSION...BUT
CLDS MAY LINGER THRU THIS MRNG.

WITH GENLY SUNNY SKIES...MAXIMA SHUD BE SIMILAR TO THOSE YDA. FCST
CALLS FOR UPR 40S-MID 50S...WITH LWR-MID 40S ON WRN SLOPES WHERE
CLD CVR WILL LINGER.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SUNDAY/...
GENLY CLR SKIES TNGT AS SFC RDG AXIS MOVES ACRS FCST AREA. NO PCPN
XPCD. DRY AIR...LIGHT WINDS AND CLR SKIES WILL PROMOTE EXCELLENT
RADIATIONAL COOLING...SO MINIMA WERE FCST BLW GUIDANCE BY A FEW
DEG F.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...
HIGH PRESSURE WILL BUILD OFF THE EAST COAST SUNDAY WHILE A COLD 
FRONT TRACKS THROUGH THE MIDWEST. RETURN FLOW AROUND THE DEPARTING
HIGH WILL BRING MILD CONDITIONS SUNDAY AFTERNOON. HIGH/MID-LEVEL
CLOUDS WILL INCREASE SUNDAY AHEAD OF THE APPROACHING COLD FRONT.

THE COLD FRONT WILL TRACK THROUGH THE OHIO VALLEY SUNDAY NIGHT AND 
THROUGH THE MID-ATLANTIC MONDAY. DESPITE LIMITED MOISTURE...THERE 
WILL BE ENOUGH LIFT ASSOCIATED WITH THE FRONT FOR A GOOD CHANCE OF 
SHOWERS...ESPECIALLY DURING THE DAY MONDAY. THERE WILL BE ENOUGH 
COLD AIR BEHIND THE FRONT FOR AT LEAST A CHANCE OF UPSLOPE SNOW
SHOWERS MONDAY AFTERNOON/NIGHT ACROSS THE POTOMAC HIGHLANDS.

HIGH PRESSURE WILL BUILD OVER THE REGION TUESDAY...BRINGING DRY AND 
SEASONABLE CONDITIONS. LOW PRESSURE WILL TRACK THROUGH THE
MISSISSIPPI VALLEY AND TOWARD THE MID-ATLANTIC WEDNESDAY AND
WEDNESDAY NIGHT. DESPITE THE UNCERTAINTY IN THE EXACT TRACK OF
THIS SYSTEM...THERE IS A GOOD CHANCE FOR RAIN...ESPECIALLY WEDNESDAY
NIGHT.

AS THE LOW MOVES OFF TO THE NORTHEAST...CHILLIER CONDITIONS ARE 
EXPECTED BEHIND THE LOW AS NORTHWEST FLOW TAKES OVER FOR LATE IN
THE WEEK. UPSLOPE SNOW SHOWERS MAY IMPACT THE POTOMAC HIGHLANDS AS
WELL.

&&

.AVIATION /09Z SATURDAY THROUGH WEDNESDAY/...
LINGERING BKN CLDS AT HIGH ELEVATION TERMINALS WILL ERODE AMID
SUBSIDENCE IN WAKE OF EXITING UPR LOW. GENLY CLR SKIES XPCD AT ALL
TERMINALS THRU TNGT. GUSTY WINDS XPCD TO CONT...SPCLY THRU 29/00Z.
WINDS DIMINISH AND SKIES CLR TNGT.

HIGH PRESSURE WILL BRING VFR CONDITIONS SUNDAY. A COLD FRONT WILL 
APPROACH THE TERMINALS SUNDAY NIGHT. VFR CONDITIONS ARE LIKELY TO 
CONTINUE DESPITE INCREASING HIGH CLOUDS AHEAD OF THE FRONT. THE COLD 
FRONT WILL PASS THROUGH MONDAY...BRINGING A GOOD CHANCE FOR SHOWERS 
AND SUBVFR CIGS/VSBYS. 

HIGH PRESSURE WILL BUILD OVERHEAD TUESDAY. LOW PRESSURE WILL BRING
THE NEXT CHANCE FOR RAIN LATER WEDNESDAY AND ESPECIALLY WEDNESDAY
NIGHT.

&&

.MARINE...
UPON REFLECTION...GALE WRNG WILL BE CANCELLED ATTM AND REPLACED
WITH SMALL CRAFT ADZY. GUSTS SUBSIDING ATTM...AND NOT XPCD TO
RESUME ABV 33 KT IN ANY WDSPRD CVRG. PREV DISCUSSION FOLLOWS...

GALE WRNG CONTS THRU 11Z ACRS LWR TIDAL POTOMAC AND LWR MD CHSPK
BAY WHERE SPORADIC GUSTS TO 34 KT ARE NOTED. GUSTS WILL DECR
SOLIDLY INTO SMALL CRAFT ADZY THRESHOLDS THIS MRNG AND WILL
PERSIST THRU THIS AFTN. AS HIPRES BUILDS TNGT...WINDS WILL WEAKEN
ACRS MOST MARINE AREAS. WILL CONT ADZY THRU LATE THIS EVE FOR LWR
TIDAL POTOMAC AND LWR MD CHSPK BAY.

HIGH PRESSURE WILL MOVE OFF THE COAST SUNDAY...AND A RETURN FLOW
WILL DEVELOP. A COLD FRONT WILL APPROACH SUNDAY NIGHT BEFORE
PASSING THROUGH THE WATERS MONDAY. AN INCREASING PRESSURE GRADIENT
BETWEEN THIS HIGH AND A COLD FRONT APPROACHING FROM THE WEST WILL
BRING POSSIBLE SCA WINDS SUNDAY NIGHT INTO MONDAY. SCA WINDS MAY
CONTINUE THROUGH MONDAY NIGHT BEHIND THE COLD FRONT AS WELL.

HIGH PRESSURE WILL BUILD OVERHEAD TUESDAY. LOW PRESSURE LIKELY
WILL IMPACT THE WATERS FOR THE MIDDLE PORTION OF NEXT WEEK.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 8 PM EST THIS EVENING FOR 
     ANZ530>533-538>541.
     SMALL CRAFT ADVISORY UNTIL 6 PM EST THIS EVENING FOR ANZ535-
     536-542.
     SMALL CRAFT ADVISORY UNTIL 1 AM EST SUNDAY FOR ANZ534-537-543.

&&

$$

UPDATE...KRAMAR
PREV DISCUSSION...KRAMAR/LASORSA