ZCZC NFDSPENES ALL
SPENES
.
SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/15/07 1228Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12: 1215Z	DS
.
LOCATION...W OHIO...INDIANA...ILLINOIS...
.
ATTN WFOS...ILN...IWX...IND...LOT...ILX...LSX...DVN...
ATTN RFCS...OHRFC...NCRFC...
.
EVENT...HVY SNOW PUSHING EWD
.
SATELLITE ANALYSIS AND TRENDS...WV IMAGERY SHOWS DEEP MOISTURE IN PLACE
OVER IL/W KY/W IN THAT CONTINUES TO PUSH TO THE NE WITH MID/UPPER LOW
STILL WAY BACK OVER THE OK AND TX PANHANDLES. IR IMAGERY HAS SHOWN CLOUD
TOP COOLING OF NEARLY 8 DEG OVER THE LAST PAST 2 HRS ACROSS IL...FROM
-47C TO ALMOST -57C. WITH THIS HAS COME AN INCREASE IN SNOWFALL RATES
WITH VISIBILITIES DROPPING TO AROUND OR LESS THAN 1 MILE IN THE E
CENTRAL PART OF THE STATE. SFC OBS REVEAL THAT THE ATMOS HAS FINALLY
MOISTENED UP ENOUGH IN WRN IN TO START SNOWING THERE AS WELL AND EXPECT
HEAVIER SNOWS CURRENTLY OVER IL TO MOVE EWD INTO IN DURING THE NEXT
FEW HRS. STLT WINDS SHOW 140 KT JET MAX PASSING OVER N IL/S LK MI/SW
MI AT THIS TIME WHICH HAS ALLOWED FOR GOOD UPPER LVL DVG IN THE RIGHT
ENTRANCE REGION OVER IN/IL. MODEL SOUNDINGS OVER WRN IN SHOW STRONGEST
UVM COLOCATED WITH -15C ISOTHERM WHICH WILL MAKE FOR GOOD DENDRITIC
SNOW GROWTH AND ILX 12Z SOUNDING COMPARES FAVORABLY WITH THESE MODEL
SOUNDINGS. RAIN/SNOW LINE IS CURRENTLY RIGHT ALONG THE IN/KY AND IL/KY
BORDER..TRYING TO CREEP SLIGHTLY NWD. EXPECT WITH WARM AIR ADVECTING
NEWD ALONG THE KY/IN BORDER..WILL SEE SOME MIXED PRECIP BUT MOSTLY IN
EXTREME SRN IN/SRN IL..WITH THE HEAVIER SNOWS WHICH COULD HAVE RATES OF
1-2"/HR IN E CENTRAL IL AND CENTRAL IN NEXT FEW HRS.
.
SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
.
SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
.
LAT...LON 4135 8912 4129 8447 3934 8428 3850 8990
.
NNNN