Area Forecast Discussion
Issued by NWS Binghamton, NY

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FXUS61 KBGM 241148
AFDBGM

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BINGHAMTON NY
648 AM EST MON NOV 24 2014

.SYNOPSIS...
A WARM FRONT WILL LIFT THROUGH THE REGION THIS MORNING BRINGING AN
END TO THE STEADY RAIN BY DAYBREAK. TODAY WILL BE UNSEASONABLY
MILD WITH ISOLATED SHOWERS AND TEMPERATURES IN THE 60S. A COLD
FRONT WILL CROSS THE AREA EARLY THIS EVENING WITH JUST ISOLATED
SHOWERS. FOLLOWING THE FRONT MORE SEASONABLE TEMPERATURES ARE
EXPECTED WITH PRIMARILY DRY WEATHER THROUGH TUESDAY NIGHT. A STORM
SYSTEM MOVING ALONG THE COAST WEDNESDAY INTO THURSDAY MORNING WILL
IMPACT PARTS OF THE AREA WITH SNOW.

&&

.NEAR TERM /THROUGH TONIGHT/...
630 AM UPDATE...ISSUED A WIND ADV FOR OTSEGO/DELAWARE COUNTIES
UNTIL NOON FOR WIND GUSTS TO 45 MPH. STRONGEST LOW LEVEL JET CORE
IS CURRENTLY MOVING THROUGH THE AREA AND ALTHOUGH MESONET SITES
SHOW LIMITED GUSTS A FEW ISOLATED TREES AND WIRES DOWN HAVE BEEN
REPORTED VIA SCANNER. OTHERWISE UPDATED POPS AS RAIN IS LIFTING
OUT A LITTLE EARLIER THAN ANTICIPATED.

PREVIOUS DISC...A WARM FRONT WILL LIFT THROUGH THE REGION THIS
MORNING AND END THE STEADY RAIN BY DAYBREAK. AS THE SFC LOW
ASSOCIATED WITH THIS BOUNDARY LIFTS NORTHEAST INTO CANADA, REGION
WILL RESIDE IN THE WARM SECTOR LATER THIS MORNING THROUGH
AFTERNOON. ONLY ISOLATED SHOWERS ARE EXPECTED FOR MUCH OF THE DAY
DUE TO LIMITED FORCING. A GUSTY SOUTHWEST WIND WILL RESIDE OVER
THE REGION WITH GUSTS NEAR 35 MPH. MAX TEMPS WILL APPROACH RECORDS
WITH READINGS GENERALLY IN THE MID TO UPPER 60S. TODAY`S RECORDS
FOR SYR/BGM/AVP ARE 70/63/69 RESPECTIVELY. THE ONLY ONE THAT MAY
FALL WOULD BE BGM.

AS THE SFC LOW LIFTS OFF TO THE NORTHEAST THE TRAILING COLD FRONT
WILL CROSS THE AREA EARLY THIS EVENING. ONLY ISOLATED TO SCATTERED
SHOWERS ARE EXPECTED WITH THIS BOUNDARY AS THE BEST FORCING AND
MOISTURE IS TO OUR WEST AND NORTH. TEMPS WILL DROP INTO THE LOWER
TO MIDDLE 40S BY DAYBREAK.

&&

.SHORT TERM /TUESDAY THROUGH THURSDAY/...
425 AM UPDATE...
MAIN CONCERN CONTINUES TO BE POTENTIAL HEAVY SNOW AND POSSIBLE
SIGNIFICANT IMPACT ON HOLIDAY TRAVEL WEDNESDAY- WEDNESDAY NIGHT.
WINTER STORM WATCH HAS BEEN ISSUED FOR PORTIONS OF THE POCONOS TO
WESTERN CATSKILLS.

BEFORE THAT...ON TUESDAY...A STRONG SOUTHWEST FLOW WILL CONTINUE
OVER THE REGION UNDER WEAK CAA AND STEEP LOW LEVEL LAPSE RATES.
THE COLD AIR WILL ONLY SLOWLY BUILD OVER THE REGION AS UPPER LEVEL
TROF AXIS REMAIN WEST OF FA AND LOW LEVEL FLOW REMAINS SOUTHWEST.
PARTLY CLOUDY SKIES ARE EXPECTED WITH DRY CONDITIONS. THERE COULD
BE A FEW RAIN/SNOW SHOWERS TUESDAY INTO TUESDAY NIGHT OVER NRN
ONEIDA COUNTY BUT MARGINAL LAKE EFFECT CONDITIONS AND PREVAILING
SOUTHWEST FLOW WILL KEEP BULK OF WEAK ACTIVITY NORTH OF REGION.
MAX TEMPS WILL RANGE IN THE LOWER TO MIDDLE 40S.

MEANWHILE TUESDAY...UPPER WAVE CURRENTLY MOVING ACROSS WESTERN
U.S. WILL DIG INTO DEEP SOUTH TEXAS ON TUESDAY...INITIATING
SURFACE CYCLOGENESIS SOMEWHERE IN THE EASTERN GULF OF MEXICO. ECMWF
FOR SEVERAL RUNS NOW /THIS HAS BEEN THE MOST STABLE MODEL WITH
THIS SYSTEM/...FROM THIS HAS GENERATED A DEEP COASTAL LOW HEADING
UP THE EAST COAST WEDNESDAY INTO EARLY THURSDAY...WITH TRACK FAR
ENOUGH WEST TO INVOLVE A LARGE CHUNK OF OUR REGION IN ACCUMULATING
SNOW. NAM BARELY SKIMS OUR REGION WITH EDGE OF A WEAKER LOW...YET
HAS BEEN GENERALLY TRENDING WEST. GFS AND CANADIAN ARE THE MIDDLE
GROUND...TRENDING TOWARDS THE ECMWF AND INVOLVING AT LEAST THE
EASTERN PORTION OF OUR REGION WITH ACCUMULATING SNOW.

WHILE ECMWF AND GFS DISAGREE ON AREA TO BE MOST IMPACTED...THEY
BOTH EXHIBIT SOME HALLMARKS OF WHAT USUALLY LEADS TO DEVELOPMENT
OF A QUASI-STATIONARY MESOSCALE HEAVY SNOW BAND. THIS INCLUDES A
SW TO NE 700MB FRONTOGENESIS AXIS ROUGHLY ALIGNED WITH UPPER
FLOW...GREAT JET SUPPORT WITH SLIGHTLY ANTICYCLONIC-CURVED STRONG
RIGHT ENTRANCE REGION TO THE NORTHWEST OF DEEPENING SURFACE LOW
/PERHAPS LEFT EXIT REGION OF SOUTHERN STREAM AS WELL/...AND IN THE
ECMWF...A 700MB LOW THAT IS CUTTING OFF IN OUR REGION AS THE
SYSTEM MOVES PAST...NEARLY SO IN THE GFS AS WELL. STILL PLENTY TO
SHAKE OUT ON THE DETAILS OF THIS SYSTEM...BUT ENOUGH CONFIDENCE IN
HEAVY SNOW POTENTIAL TO INTRODUCE WINTER STORM WATCH IN
COORDINATION WITH NEIGHBORING NWS OFFICES...FOR PORTIONS OF
POCONOS-WESTERN CATSKILLS WEDNESDAY TO EARLY THURSDAY. THIS FOR
INCLUDES WAYNE-PIKE IN NEPA AND SULLIVAN-DELAWARE IN NY.

THE WATCH AREA HAS POTENTIAL FOR 7 OR MORE INCHES OF
SNOW...PERHAPS EVEN APPROACHING A FOOT...BUT THESE DETAILS WILL BE
REFINED AS THE MODELS CONVERGE TOWARDS A COMMON SOLUTION THE NEXT
COUPLE OF DAYS. FARTHER TO THE WEST...SIGNIFICANT SNOW ALSO
POSSIBLE ESPECIALLY ALONG AND EAST OF I-81...BUT MORE UNCERTAINTY.
IF CONFIDENCE DOES INCREASE...ADDITIONAL ZONES MAY BE ADDED TO THE
WATCH. REGARDLESS...THIS SYSTEM COULD SIGNIFICANTLY IMPACT HOLIDAY
TRAVEL...AND THE FARTHER SOUTH AND EAST IN OUR AREA...THE BIGGER
THE IMPACT. MONITOR THE FORECAST AS THE EVENT DRAWS NEARER.

&&

.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
USED HPC GUIDANCE WITH MESOSCALE ADJUSTMENTS FOR POTENTIAL LAKE
SNOW AREAS. TROF WILL DESCEND UPON THE NERN CONUS ONCE AGAIN WITH
A PERSISTENT POLAR FLOW OUT OF CANADA. BOTH LAKE ERIE AND LAKE
ONTARIO WILL ACTIVATE, BUT IT IS TOO EARLY TO DETERMINE WHERE THE
BANDS WILL LINE UP EXACTLY. BEST FIRST GUESS: ACCUMULATIONS ARE
MOST LIKELY FROM FAR NORTHERN ONONDAGA COUNTY INTO NORTHERN AND
WESTERN ONEIDA COUNTY.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...
MOST SIGNIFICANT PART OF THIS FORECAST WILL BE THE LOW LEVEL WIND
SHEAR THAT WILL IMPACT THE REGION THROUGH LATE MORNING DUE TO A
STRONG LOW LEVEL JET OF APPROXIMATELY 50 KNOTS ABOUT 2K FT OFF THE
SURFACE. BAND OF MAINLY LIGHT RAIN HAS LIFTED NORTH OF REGION
BUT MVFR CIGS WILL LINGER UNTIL MID/LATE MORNING WITH IMPROVEMENT
TO LOW VFR AS AREA RESIDES IN WARM SECTOR. THIS EVENING THE SFC
OCCLUSION WILL MOVE THROUGH BUT BOUNDARY IS FAIRLY DRY WITH NO
PROLONGED RESTRICTIONS EXPECTED.

SE SURFACE WINDS BETWEEN 8-12KTS WITH GUSTS TO 25 KNOTS IN THE
HIGHER TERRAIN SHIFTING TO SOUTHERLY BY MID MORNING AT 10-15 KNOTS
WITH GUSTS NEAR 25-30KTS. WINDS BECOMING SOUTHWEST THIS EVENING AT
12-15 KNOTS WITH GUSTS AROUND 25-30 KNOTS.

OUTLOOK...

TUE-TUE NGT...MAINLY VFR.

WED-WED NGT...COASTAL SYSTEM MAY IMPACT REGION WITH RESTRICTIONS FROM
SNOW...BEST CHANCE KAVP.

THU/FRI...POSSIBLE RESTRICTIONS FROM SCT -SHSN...ESPECIALLY KSYR-KRME.

&&

.BGM WATCHES/WARNINGS/ADVISORIES...
PA...WINTER STORM WATCH FROM WEDNESDAY MORNING THROUGH THURSDAY
     MORNING FOR PAZ040-048-072.
NY...WINTER STORM WATCH FROM WEDNESDAY MORNING THROUGH THURSDAY
     MORNING FOR NYZ057-062.
     WIND ADVISORY UNTIL NOON EST TODAY FOR NYZ046-057.

&&

$$
SYNOPSIS...RRM
NEAR TERM...RRM
SHORT TERM...MDP/RRM
LONG TERM...DJP
AVIATION...RRM





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