MESO: Mesoscale Discussion 0208

ACUS11 KWNS 241540
SWOMCD
SPC MCD 241540
MEZ000-NHZ000-241945-

MESOSCALE DISCUSSION 0208
NWS STORM PREDICTION CENTER NORMAN OK
0940 AM CST SUN FEB 24 2013

AREAS AFFECTED...SRN ME...SERN NH

CONCERNING...HEAVY SNOW

VALID 241540Z - 241945Z

SUMMARY...MODERATE TO HEAVY SNOW WITH RATES AROUND 1 IN/HR WILL
GRADUALLY DIMINISH DURING THE EARLY AFTERNOON.

DISCUSSION...METAR OBSERVATIONS AND WFO GYX SPOTTER REPORTS CONFIRM
SNOWFALL RATES AROUND 1 IN/HR OCCURRING WITHIN A BAND OF MODERATE TO
HEAVY SNOW ACROSS PARTS OF COASTAL NEW ENGLAND. THIS BAND APPEARS TO
BE RELATIVELY WELL-FORECAST BY 00Z CONVECTION-ALLOWING MODEL
GUIDANCE /ALBEIT SOMEWHAT SLOW IN TIMING/ AND THE 09Z SREF MEAN/12Z
NAM. AS THE COLD-CONVEYOR BELT/ASSOCIATED DEFORMATION AXIS NEAR 700
MB SHIFTS E OF THE COAST...LIFT WITHIN THE DENDRITIC GROWTH ZONE
WILL SUBSIDE BY EARLY AFTERNOON. HOWEVER...FORECAST SOUNDINGS
SUGGEST NEAR-SATURATED CONDITIONS WILL PERSIST INFERRING THAT LIGHT
TO MODERATE SNOWFALL WILL CONTINUE FOR MUCH OF THE AFTERNOON EVEN
THOUGH RATES WILL DIMINISH.

..GRAMS.. 02/24/2013

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

ATTN...WFO...CAR...GYX...

LAT...LON 44597002 44866947 44796890 44596851 44346854 43846957
42997087 43087124 43247157 43457151 43967091 44597002

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