FXUS61 KLWX 281531 AAA
AFDLWX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1031 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 8 PM THIS EVENING/...
CLEARING SKIES...DRY AIR AND DOWNSLOPING WINDS WOULD NORMALLY MAKE
FOR RELATIVELY WARMER CONDITIONS...BUT EVEN W/ HIGHS TOPPING OUT
IN THE L50S...IT WILL FEEL 10-15 DEG COOLER W/ THIS STEADY WNWLY
WIND. GUSTS IN THE 20-30 MPH RANGE EXPECTED TO CONTINUE THROUGHOUT
THE AFTN HRS...GRADUALLY DISSIPATING TOWARD EVNG. THESE ARE THE
LINGERING AND LAST EFFECTS OF THE EXITING COMPLEX UPPER LOW THAT/S
NOW SLIDING OFF THE NEW ENGLAND COAST.

&&

.SHORT TERM /8 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 /15Z SATURDAY THROUGH WEDNESDAY/...
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...
STILL WINDY TODAY...NOT GALE CONDITIONS /THO A FEW SITES MAY STILL
SEE AN INTERMITTENT NEAR 30KT GUST THRU THIS AFTN/. SOLID SCA
CONDITIONS ACROSS THE WATERS...W/ A GENERAL DECREASE BY LATE
AFTN/EARLY EVNG AS HIPRES BUILDS IN. 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...GMS
PREV DISCUSSION...KRAMAR/LASORSA