ZCZC NFDSPENES ALL
SPENES
MNZ000-IAZ000-NEZ000-SDZ000-NDZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/25/08 1525Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 1515Z  HANNA
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LOCATION...MINNESOTA...IOWA...NEBRASKA...SOUTH DAKOTA...
LOCATION...NORTH DAKOTA...
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ATTN WFOS...DLH...MPX...FGF...FSD...OAX...ABR...LBF...
ATTN RFCS...NCRFC...MBRFC...
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EVENT...WINTER PRECIPITATION
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SATELLITE ANALYSIS AND TRENDS...LATEST GOES WATER VAPOR AND INFRARED
IMAGERY SHOWS THAT LOW PRESSURE SYSTEM CURRENTLY ANALYZED OVER CNTRL IA
CONTINUES TO DEEPEN PER EVOLUTION OF CUSP/COMMA CLOUD APPEARANCE ON MOST
RECENT IMAGERY.  HAVE NOTED RAPID ENHANCEMENT TO CLOUD TOPS OVER MOSTLY
CNTRL SD AND THIS IS LIKELY IN RESPONSE TO INCREASING FRONTOGENETIC
FORCING WITH DEEPENING SYSTEM.  THE INCREASE IN LARGE SCALE FORCING
APPEARS TO BE DRIVEN PRIMARILY BY RAPIDLY AMPLIFYING SHORTWAVE TROF OVER
WESTERN NE ALONG WITH ATTENDANT JET STREAK AT THE BASE OF TROF WHICH
IS BEGINNING TO COUPLE WITH JET STREAK AT THE CREST OF DOWNSTREAM RIDGE
AXIS OVER S CNTRL CANADA.
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LATEST 15Z SURFACE MESOANALYSIS SHOWS THAT THE SNOW/MIXED PRECIPITATION
LINE LIES ROUGHLY ALONG AN ARC FROM OFK NORTH TO ABOUT ATY WHILE THE
RAIN/MIXED PRECIPITATION LINE IS ROUGHLY ALONG A LINE FROM EST TO VVV.
WITH CONTINUED DEVELOPMENT AND THE EVENTUAL CLOSING OFF OF SYSTEM AT
70H/50H BELIEVE SNOW LINE SHOULD COLLAPSE SLOWLY SEWARD THROUGHOUT
THE DAY.
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IT APPEARS AS THOUGH BEST DRY SLOT FROM TROP FOLD SHOULD CONTINUE NEWARD
THROUGHOUT THE DAY AND PUSH THROUGH MOST OF SE MN AND INTO EXTREME N
WI BY MID TO LATE AFTERNOON.  THIS WOULD FAVOR THAT BEST FRONTOGENESIS
FROM MID LEVEL DEFORMATION AND EPV REDUCTION SHOULD BE FROM SE SD AND
EXTENDING INTO N CNTRL MN.  THUS WOULD THINK HEAVIEST PRECIPITATION
WILL FALL ROUGHLY 75 MILES EITHER SIDE OF AN AXIS FROM MHE TO FOZ.
EXPERIMENTAL SATELLITE ALGORITHM SUGGESTS THAT BEST SATURATED ASCENT IS
ROUGHLY COLLOCATED WITH BEST DENDRITIC SNOW GROWTH LAYER OVER MOST OF
E SD WHICH WOULD FAVOR LOCAL SNOWFALL RATES OF 1-2"/HR NEAR THE HON/MHE
AREA AND IN ANY OTHER SW/NE ORIENTED BANDS OVER THE NEXT SEVERAL HOURS.
WILL CONTINUE TO MONITOR AS PRECIPITATION DEVELOPS NEWARD THROUGHOUT
THE DAY.
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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 4787 9502 4781 9346 4700 9306 4559 9417 4378 9607 4203
9884 4271 9950 4403 9911 4561 9810 4729 9650
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