FXUS61 KPBZ 101555
AFDPBZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
1055 AM EST THU DEC 10 2009
.SYNOPSIS...
GUSTY WINDS WILL REMAIN ACROSS THE AREA TODAY BEFORE BEGINNING TO
DIMINISH. TEMPERATURES FOR THE REST OF THE WORK WEEK WILL BE
SHARPLY COLDER BEHIND YESTERDAYS COLD FRONT.
&&
.NEAR TERM /THROUGH TONIGHT/...
SOME WRAPAROUND MOISTURE ASSOCIATED WITH A LOW PRESSURE SYSTEM OVER
CANADA WILL ALLOW SCATTERED SNOW SHOWERS TO CONTINUE TODAY.
LOCATIONS NORTH AND EAST OF PITTSBURGH COULD SEE ANYWHERE FROM A
DUSTING TO AN INCH OF ACCUMULATION. THE PRESSURE GRADIENT WILL
REMAIN TIGHT BETWEEN THE DEPARTING LOW AND HIGH PRESSURE OVER THE
CENTRAL PLAINS...KEEPING WINDS GUSTY THROUGHOUT THE DAY. SOME
LOCATIONS IN THE HIGHEST ELEVATIONS MAY FLIRT WITH WIND ADVISORY
CRITERIA...BUT WITH LOW CONFIDENCE IN ANY WIDESPREAD 45 MPH
GUSTS...WILL NOT ISSUE AN ADVISORY AT THIS TIME. HIGHS WILL BE MUCH
COLDER THAN YESTERDAY...SOME 15-20 DEGREES BELOW NORMAL.
AS LOW LEVEL MOISTURE DIMINISHES...SNOW SHOWERS ARE EXPECTED TO COME
TO AN END OVERNIGHT. WINDS SHOULD ALSO BEGIN TO DECREASE DURING THIS
TIME PERIOD...ALTHOUGH WIND GUSTS UP TO 30 MPH WILL STILL BE
POSSIBLE. WIND CHILL ADVISORIES COULD BE NEEDED FOR THE HIGHER
ELEVATIONS OF WEST VIRGINIA AND MARYLAND OVERNIGHT...WITH LOWS
AROUND 10 ABOVE AND STRONG WINDS REMAINING OVER THE AREA.
&&
.SHORT TERM /FRIDAY THROUGH SUNDAY/...
HIGH PRESSURE WILL SLOWLY MAKE ITS WAY TO THE NORTHEAST FRIDAY INTO
SATURDAY...ALLOWING FOR DECREASING WINDS AND CLOUD COVER. FLOW OUT
OF THE SOUTH SHOULD ALLOW TEMPERATURES TO BEGIN MODERATING FOR THE
WEEKEND. NEXT SYSTEM DEVELOPING ALONG THE SOUTHEASTERN U.S. COULD
CLIP THE FORECAST AREA ON SUNDAY...AND WITH BETTER AGREEMENT
BETWEEN THE GFS/ECMWF...HAVE SLIGHTLY INCREASED POPS FOR THIS TIME
PERIOD. CURRENT FORECASTED TEMPERATURES WOULD ALLOW FOR A MIX OF
RAIN AND SNOW IN MOST LOCATIONS.
&&
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
THE NEXT COLD FRONT APPROACHING FROM THE WEST WILL BRING
SCATTERED POPS FOR SNOW SHOWERS AND SNOW SHOWERS MIXED WITH RAIN
SOUTH MONDAY NIGHT AND TUESDAY. SURFACE RIDGE WILL BUILD BACK
INTO THE REGION WEDNESDAY WITH MAINLY DRY CONDITIONS EXPECTED.
TEMPERATURES ARE EXPECTED TO BE WITHIN A FEW DEGREES OF NORMAL FOR
THE EXTENDED PERIOD.
&&
.AVIATION /16Z THURSDAY THROUGH MONDAY/...
MVFR TO LOW END VFR CONDITIONS WILL PREVAIL THROUGH THE EARLY
AFTERNOON HOURS...WITH AREAS OF IFR IN HEAVIER SNOW SHOWERS.
CONDITIONS FOR PORTS PIT SOUTHWARD WILL IMPROVE TO BROKEN LOW
END VFR BY LATE AFTN AS LOW PRESSURE MOVES TO THE NORTHEAST.
MVFR WITH SCATTERED SNOW SHOWERS WILL CONTINUE FOR FKL/DUJ
INTO THIS EVENING. WESTERLY WINDS OF 15-20 KT WITH GUSTS TO 30 KT
WILL CONTINUE THROUGH THIS AFTN...WITH A GRADUAL DECREASING
TREND TNGT.
VFR CONDITIONS WILL WORK ACROSS ALL AREAS BY FRIDAY AS HIGH PRESSURE
BUILDS OVER THE REGION...CONTINUING THROUGH SATURDAY. RESTRICTIONS
WILL PREVAIL SUNDAY/MONDAY...AS THE NEXT SYSTEM AFFECTS THE
AREA...WITH SOME POTENTIAL FOR MIXED WINTRY PRECIPITATION SUNDAY.
&&
.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.
&&
$$
