[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 170121
SWOMCD
SPC MCD 170120 
MAZ000-NHZ000-RIZ000-170615-

MESOSCALE DISCUSSION 0105
NWS STORM PREDICTION CENTER NORMAN OK
0720 PM CST SUN JAN 16 2005

AREAS AFFECTED...CAPE COD AND COASTAL MA

CONCERNING...HEAVY SNOW 

VALID 170120Z - 170615Z

OCNLY HEAVY SNOW EXPECTED TO DEVELOP THROUGH 03Z ACROSS CAPE
COD/NANTUCKET/MARTHA VINEYARD AND COASTAL AREAS OF ERN MA. SNOW
RATES MAY APPROACH 1 IN/HR INTO THE OVERNIGHT...AMIDST INCREASINGLY
STRONG NELY WINDS.

WV/IR IMAGERY IN ACCORDANCE WITH SURFACE DIAGNOSTICS REVEALS
INTENSIFYING SFC LOW CENTERED ABOUT 250 MILES SOUTH OF ACK
/NANTUCKET/. RAPID PRESSURE FALLS HIGHLIGHTED BY 5.7 MB/3 HR FALLS
WERE OBSERVED IN OCEAN BUOY 60 SSE OF ACK BETWEEN 21Z-00Z. WITH
MARINE INFLUENCE...SFC TEMPS REMAIN AROUND/ABOVE 32F ACROSS COASTAL
MA/CAPE COD INTO MARTHAS VINEYARD/NANTUCKET AT 00Z. HOWEVER 21 RUC
SOUNDINGS/00Z GYX RAOB SUPPORT OCNLY HEAVY SNOW GIVEN SUB-FREEZING
AIRMASS ABOVE SFC LAYER.

AS CYCLONE INTENSIFIES AND MOVES EAST OF SRN NEW ENGLAND
AROUND/AFTER 06Z...SW-NE ORIENTED MID LEVEL /600-800 MB/
FRONTOGENETICAL FORCING WILL TEND TO PROMOTE MULTIPLE SNOW BANDS IN
A SIMILAR ORIENTATION ACROSS COASTAL AREAS OF ERN/SERN MA. IN
ADDITION...OWING TO STRENGTHENING PRESSURE GRADIENT...NELY WINDS
WILL STEADILY INCREASE AND CREATE PERIODIC WHITE-OUT CONDITIONS
LATER THIS EVENING.

..GUYER.. 01/17/2005

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 00-01 UTC...
06-07 UTC...12-13 UTC...AND 18-19 UTC AS SIGNIFICANT SHORT
RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
USED FROM DECEMBER 1 THROUGH FEBRUARY 28.

ATTN...WFO...GYX...BOX...

43047079 42527036 41966991 41197000 41307076 41617126
42087136 42527128 42867100 

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