FXUS61 KPBZ 111955
AFDPBZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
255 PM EST FRI DEC 11 2009
.SYNOPSIS...
HIGH PRESSURE OVER THE MID ATLANTIC REGION WILL KEEP WEATHER
CONDITIONS DRY AND COLD TONIGHT AND SATURDAY. AN APPROACHING LOW
PRESSURE SYSTEM WILL BRING A CHANCE OF A WINTRY MIX OF PRECIPITATION
LATE SATURDAY NIGHT INTO SUNDAY MORNING.
&&
.NEAR TERM /THROUGH SATURDAY/...
SURFACE HIGH PRESSURE WILL MOVE FROM THE CENTRAL APPALACHIANS
INTO THE MID ATLANTIC REGION THROUGH SATURDAY. WINDS WILL CONTINUE
TO DIMINISH AS PRESSURE GRADIENT WEAKENS OVERNIGHT. PLAN TO KEEP
SMALL POPS FOR SNOW SHOWERS FAR NORTH TONIGHT...DRY ELSEWHERE.
SATURDAY SHOULD BE MOSTLY SUNNY WITH HIGHS LOWER 30S NORTH TO
UPPER 30S SOUTH.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
LOW PRESSURE SYSTEM ALONG THE EAST COAST WILL SPREAD MOISTURE AND
PRECIPITATION INTO THE AREA BY LATE SATURDAY NIGHT. MOST LOCATIONS
SHOULD HAVE A CHANCE FOR SNOW AND/OR FREEZING RAIN LATE SATURDAY
NIGHT AND EARLY SUNDAY MORNING. TEMPERATURES SHOULD WARM ABOVE
FREEZING AND ALLOW PRECIPITATION TO CHANGE OVER TO ALL RAIN BY
MIDDAY SUNDAY.
WEAK RIDGE WILL BUILD IN SUNDAY NIGHT AND MONDAY. ANY LEFT OVER
PRECIPITATION IS EXPECTED TO PUSH EAST OF THE FORECAST AREA BY
LATE SUNDAY NIGHT WITH DRY CONDITIONS ON MONDAY.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
A COLD FRONT IS PROGGED TO APPROACH THE AREA MONDAY NIGHT...SWEEPING
ACROSS THE AREA TUESDAY. WITH LIMITED RUN TO RUN CONTINUITY...WILL
KEEP POPS CHANCE FOR NOW. SIGNIFICANTLY COLDER AIR...ALONG WITH
CHANCES OF LAKE ENHANCED/UPSLOPE SNOW SHOWERS WILL PREVAIL FOR
MIDWEEK...WITH ZONAL FLOW BRINGING MAINLY DRY AND SEASONABLY COLD
CONDITIONS FOR LATE NEXT WEEK.
&&
.AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...
VFR CONDITIONS WILL PREVAIL THIS AFTN THROUGH SATURDAY AS HIGH
PRESSURE BUILDS ACROSS THE REGION. ISOLATED MVFR IS PSBL NORTH
OF I-80 THROUGH THIS AFTN WITH RESIDUAL LAKE ENHANCED FLURRIES
BUT THINK ANY RESTRICTIONS WILL BE NORTH OF PORTS FKL/DUJ. WEST
WINDS 20-25 KT WITH GUSTS TO 30-35 KT THIS AFTN WILL BEGIN TO
DECREASE THIS EVENING...BECOMING LESS THAN 10 KT AREA WIDE
OVERNIGHT. CLOUDS WILL INCREASE SATURDAY EVENING...WITH RESTRICTIONS
SUNDAY INTO SUNDAY NIGHT. INITIAL PRECIP LATE SATURDAY NIGHT/EARLY
SUNDAY MAY BE OF THE MIXED WINTRY TYPE ESPECIALLY NORTH OF PIT. THE
SYSTEM IS PROGGED TO EXIT SUNDAY NIGHT INTO MONDAY FOR MAINLY
VFR...WITH A COLD FRONT BRINGING SHOWERS/RESTRICTIONS AGAIN FOR
TUESDAY.
&&
.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.
&&
$$
