ZCZC NFDSPENES ALL
SPENES
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/16/07 1154Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-10: 1132Z	DS
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LOCATION...OHIO...MICHIGAN...INDIANA...
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ATTN WFOS...CLE...ILN...DTX...IWX...GRR...IND...
ATTN RFCS...OHRFC...NCRFC...
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EVENT...SOME MOD TO HVY SNOWS CONTINUE ACROSS NE IN/SE MI/NW OH
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SATELLITE ANALYSIS AND TRENDS...UPPER LOW IS SEEN ON WV IMAGERY ROTATING
ACROSS N CENTRAL IN AT THIS TIME WITH A BROAD MID/UPPER LVL DIFFLUENCE
ZONE OVER N OH/SE MI/EXTREME NW PA. THIS DIFFLUENCE IS ALSO NOTED IN VWP
AT 400-700 MB. MESOANLYSIS OVER THE OH VALLEY PUTS THE SFC LOW NEAR KBJJ
IN N CENTRAL OH AND IS DEPICTED VERY WELL BY THE SFC WIND FLOW. COLD AIR
ADVECTION FROM THE N FROM MI AND FROM THE NW FROM WI ACROSS LK MI HAS
POOLED BEHIND THE SFC LOW AND ENOUGH INSTABILITY IS STILL BEING GENERATED
BY THE UPPER LOW TO PRODUCE AT LEAST SOME MOD SNOWFALL RATES. TWO BNDRYS
ARE EMANATING FROM THE SFC LOW..ONE TO THE N ACROSS THE WRN END OF LK ERIE
AND THE OTHER SWWD ALONG THE KY/IN BORDER..AND S AND E OF THESE BNDRYS
ARE WHERE WARM AIR WRAPPING AROUND THE LOW IS CAUSING A CHANGEOVER TO
RAIN WITH A LITTLE ROOM FOR A ZONE OF MIXED PRECIP. WHILE THE MID/UPPER
DIFFLUENCE ZONE ONLY COVERS A SMALL AREA WHERE PRECIP TYPE IS SNOW INSTEAD
OF RAIN..THAT OVER NW OH/SE MI/EXTREME NE IN..IT IS IN THIS AREA WHERE
HEAVIEST SNOWS WILL OCCUR AS THE LOW LIFTS NEWD. BELIEVE THAT SNOWFALL
RATES OF 1"/HR CAN BE REACHED DUE TO COLDER TEMPS FILLING IN BEHIND
THE LOW INCREASING SNOW/LIQUID RATIOS. SEE WEB ADDRESS IN ABOUT 10 MIN
FOR GRAPHIC.
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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 4356 8140 3986 8249 3938 8473 3891 8700 4267 8568
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