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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KLWX 101426
AFDLWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
926 AM EST WED FEB 10 2010

.SYNOPSIS...
LOW PRESSURE WILL MOVE OFF OF THE COAST OF THE CAROLINAS TODAY AND
THEN UP THE EASTERN SEABOARD OVERNIGHT AND THURSDAY. THIS LOW
PRESSURE SYSTEM WILL BRING ANOTHER ROUND OF WINTRY PRECIPITATION TO
THE AREA...ALONG WITH GUSTY WINDS. HIGH PRESSURE WILL BUILD OVER THE
AREA FOR THE LATTER HALF OF THE WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
-- Changed Discussion --
SURGE OF COLD AIR HAS BROUGHT A SNW SQUALL W/ BLIZZARD CONDS. HV
UPDTD FCST TO REFLECT THAT. HV NOT TOUCHED SNW ACCUMS. HWVR WNDS
MAKING ACCURATE SNW MEASUREMENT VERY PROBLEMATIC. THE BLOWING AND
DRIFTING A MUCH BIGGER CONCERN.

A BACK EDGE TO THE PCPN SHIELD EVIDENT ACRS CENTL VA ATTM. WL
NEED TO REASSESS WSW HEADLINES SHORTLY. AT THE SAME TIME WL ASSESS
NEED FOR WND ADVY HEADLINES WHERE BLIZZARD WNRGS NOT CURRENT.
-- End Changed Discussion --

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM THURSDAY/...
UPSLOPE SNOW WILL CONTINUE FOR THE CNTRL APLCNS WELL AFTER THE
COASTAL LOW HAS MOVED OFF THE MID ATLC COAST THRU THURSDAY AFTN.
MODERATE SNOW ACCUMULATION POSSIBLE FOR THE HIGHER ELEVATIONS DURING
THIS PERIOD. E OF THE MTNS...DRY-COLD AND WINDY WX WILL REPLACE THE
EXITING LOW PRESSURE SYSTEM.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
NO MAJOR CHANGES TO THE LONG TERM PORTION OF THE FORECAST WERE MADE.

UPSLOPE SNOW SHOWERS WILL BEGIN TO WANE ON THURSDAY AS HIGH PRESSURE
BUILDS IN FROM THE WEST. HAVE KEPT POPS PRETTY HIGH ACROSS THE
WESTERN RIDGES...BUT SNOW SHOULD COMPLETELY CUT OFF BY EARLY FRIDAY.
TEMPERATURES ARE EXPECTED TO REMAIN BLO FREEZING FOR MOST LOCALES
THURSDAY AND THURSDAY NIGHT...BUT ABOVE FREEZING MAX TEMPS ARE
EXPECTED FRIDAY AND SATURDAY. A COLD FRONT COMES THROUGH THE REGION
DURING THE WEEKEND...WITH HIGH PRESSURE BUILDING IN FOR THE FIRST
PART OF NEXT WEEK.

&&

.AVIATION /14Z WEDNESDAY THROUGH SUNDAY/...
-- Changed Discussion --
A LARGE BAND OF MODERATE TO HEAVY SNOW HAS WILL SET-UP OVER THE
DC- BALT METRO AREA...AS WINDS ALSO INCREASE OUT OF THE WNW. WNDY
CONDS WL LAST FOR THE NEXT 24-36 HRS. GUSTS NEAR 40KT WILL BE
COMMON THRU THE AFTN/EVENING...SUBSIDING ONLY A BIT OVERNIGHT AND
LASTING INTO THU.

IFR/LOWER EXPECTED ACROSS THE REGION FOR THE NEXT SEVERAL HRS.
SLOW IMPVMNT LT TDA-TNGT.

CIGS/VSBYS ARE EXPECTED TO REMAIN VFR THROUGH THURSDAY AT MOST
LOCALES. HOWEVER...BLOWING SNOW MAY LOCALLY REDUCE SOME VSBYS BLO
VFR AT TIMES WHERE WINDS ARE THE MOST GUSTY. HIGH PRESSURE BUILDS IN
FOR THE REMAINDER OF THE WEEK AND NO CIGS/VSBY RESTRICTIONS ARE
ANTICIPATED.
-- End Changed Discussion --

&&

.MARINE...
-- Changed Discussion --
WNDS WL INCR TO GLW THIS MORNING. A STRONG LOW PRESSURE SYSTEM
AFFECTING THE REGION WILL INCREASE WINDS OVER THE WATERS LASTING INTO
THU.

GALE CONDITIONS ARE EXPECTED TO CONTINUE THROUGH MOST OF THURSDAY AS
LOW PRESSURE MOVES UP THE EASTERN SEABOARD. THE GRADIENT IS EXPECTED
TO LESSEN THURSDAY EVENING AND OVERNIGHT AS HIGH PRESSURE BUILDS IN
FROM THE WEST. HOWEVER...SMALL CRAFT CONDITIONS ARE LIKELY THROUGH
THIS PERIOD. TO LESSEN CONFUSION...WILL NOT TACK ON THE SCA HEADLINE
ON THE END OF THE GALE. WILL MENTION IN THE SYNOPSIS AND HAVE 20
PLUS KT IN THE TEXT.

HIGH PRESSURE BUILDS IN FOR THE LATTER PART OF THE WEEK...AND
LIGHTER WINDS ARE EXPECTED.
-- End Changed Discussion --

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
DC...BLIZZARD WARNING UNTIL 7 PM EST THIS EVENING FOR DCZ001.
MD...BLIZZARD WARNING UNTIL 7 PM EST THIS EVENING FOR MDZ003>007-
     009>011-013-014-016>018.
     BLIZZARD WARNING UNTIL 4 PM EST THIS AFTERNOON FOR MDZ502.
     BLIZZARD WARNING UNTIL 7 AM EST THURSDAY FOR MDZ501.
VA...BLIZZARD WARNING UNTIL 7 PM EST THIS EVENING FOR VAZ028-030-
     031-042-052>055-057-501-502.
     WINTER STORM WARNING UNTIL 4 PM EST THIS AFTERNOON FOR
     VAZ025>027-029-036>039.
     BLIZZARD WARNING UNTIL 7 AM EST THURSDAY FOR VAZ021.
     WINTER STORM WARNING UNTIL 7 PM EST THIS EVENING FOR VAZ040-
     050-051-056.
WV...BLIZZARD WARNING UNTIL 7 PM EST THIS EVENING FOR WVZ052-053.
     BLIZZARD WARNING UNTIL 4 PM EST THIS AFTERNOON FOR WVZ050-051-
     055-502-504.
     BLIZZARD WARNING UNTIL 7 AM EST THURSDAY FOR WVZ054-501-503.
MARINE...GALE WARNING UNTIL 6 PM EST THURSDAY FOR ANZ530>543.
-- End Changed Discussion --

&&

$$
SYNOPSIS...
NEAR TERM...HTS
SHORT TERM...GMS
LONG TERM...LISTEMAA
AVIATION...HTS/GMS/LISTEMAA
MARINE...HTS/GMS/LISTEMAA