Friday, December 19, 2008

MESO: Mesoscale Discussion 2489

ACUS11 KWNS 192346
SWOMCD
SPC MCD 192346
MEZ000-MAZ000-NHZ000-RIZ000-VTZ000-CTZ000-NYZ000-200345-

MESOSCALE DISCUSSION 2489
NWS STORM PREDICTION CENTER NORMAN OK
0546 PM CST FRI DEC 19 2008

AREAS AFFECTED...PORTIONS OF NEW ENGLAND

CONCERNING...HEAVY SNOW

VALID 192346Z - 200345Z

HEAVY SNOW WILL CONTINUE ACROSS PORTIONS OF UPSTATE NY EWD INTO NEW
ENGLAND WITH RATES OF 1-2 INCHES PER HOUR OVER THE NEXT FEW HOURS.
THEREAFTER...RATES AND ACCUMULATIONS WILL SIGNIFICANTLY DECREASE.

A FAST MOVING UPPER LOW HAS REACHED CNTRL PA/NY THIS HOUR...AND WILL
QUICKLY MOVE EWD INTO THE ATLANTIC OVER THE NEXT FEW HOURS. THE LOW
HAS BEEN WEAKENING RECENTLY...AND THIS TREND WILL CONTINUE. AT THE
SURFACE...A LOW IN N CNTRL PA WILL WEAKEN AND MOVE EWD AS WELL.
BEFORE WEAKENING...A NARROW WINDOW OF STRONG WARM
ADVECTION...REFLECTED IN CURRENT VAD WIND PROFILE DATA...AND UVV
WILL EXIST ACROSS UPSTATE NY AND PORTIONS OF NEW ENGLAND. AREAS OF
HIGHER TERRAIN WILL BE ESPECIALLY FAVORED FOR HEAVY SNOWFALL. HIGH
PRESSURE ALOFT AND AT THE SURFACE WILL QUICKLY FOLLOW...WITH
DECREASING SNOW RATES AS MOISTURE IS SHUNTED TO THE SOUTH AND EAST.

..HURLBUT.. 12/19/2008

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.

ATTN...WFO...CAR...GYX...BOX...BTV...OKX...ALY...BGM...BUF...

LAT...LON 41547157 42037473 42887602 43857627 44937450 45047237
44866858 44326805 43037054 41746971 41547157

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