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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 01/28/08 0300Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 0245Z  HANNA
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LOCATION...MASSACHUSETTS...RHODE ISLAND...
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ATTN WFOS...BOX...
ATTN RFCS...NERFC...
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EVENT...HEAVY SNOW WITH LOCALIZED BLIZZARD CONDITIONS
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SATELLITE ANALYSIS AND TRENDS...12 HR WATER VAPOR IMAGERY LOOP SHOWS
THAT OFFSHORE SYSTEM HAS DEVELOPED RAPIDLY OVER THE LAST 12 HRS
AND HAS TAKEN ON THE CHARACTERISTIC CLASSIC COMMA CLOUD APPEARANCE.
APPROXIMATE CENTER OF SUB 988MB LOW APPEARS TO BE NEAR 39.2N/68.9W.
VERY WELL DEFINED COMMA HEAD CURRENTLY ORIENTED FROM THE WESTERN HALF OF
NOVA SCOTIA AND EXTENDING THROUGH SE MA.  MID AND UPPER LEVEL DEFORMATION
ASSOCIATED WITH COMMA HEAD HELPING TO FORCE A STRONG AREA OF LOW AND MID
LEVEL FRONTOGENESIS THAT IS ROUGHLY ALONG THE LEADING EDGE OF SATELLITE
CLOUD TOP ENHANCEMENT FROM 42.4N/67.5W THROUGH EXTREME SE MA.
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LOCAL RADAR CONFIRMS SATELLITE TRENDS AS A WELL DEFINED FRONTOGENTICALLY
FORCED BAND OF SNOWFALL IS CURRENTLY SITUATED FROM PVC TO EWB.
GOES EXPERIMENTAL DENDRITIC SNOW GROWTH PRODUCT SHOWS REGION IS IN A
FAVORABLE AREA OF SATURATED ASCENT THROUGH SNOW GROWTH LAYER SO WOULD
THINK SNOWFALL RATES OF 1-2"/HR ARE QUITE LIKELY WITHIN THIS BAND.
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UPSTREAM HEAD BOUNDARY LOCATED FROM N VT THROUGH LONG ISLAND ON WATER
VAPOR IMAGERY HAS SHOWN VERY LITTLE IF ANY MOVEMENT OVER THE PAST 6 HRS.
AN EVENTUAL E AND SE MOVEMENT SHOULD ENSUE WITH APPROACH OF UPSTREAM PV
LOBE OVER THE EASTERN LAKES BUT FOR AT LEAST THE NEXT 3-6HRS BELIEVE THAT
LOCALLY HEAVY SNOWFALL WITH SLOW MOVING/STATIONARY BANDS SHOULD CONTINUE.
SNOWFALL RATES OF 1-2"/HR SHOULD BE COMMON AND WITH SUSTAINED WINDS OF
20-30 KTS WITH LOCALIZED GUSTS TO 40 KTS, LOCALIZED BLIZZARD CONDITIONS
ARE LIKELY.  WILL CONTINUE TO MONITOR.
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SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
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SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
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LAT...LON 4285 6922 4274 6857 4213 6855 4167 6897 4080 6993 4045
7077 4083 7169 4149 7163 4204 7112 4249 7050
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