ZCZC NFDSPENES ALL
SPENES
NEZ000-SDZ000-MTZ000-WYZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 05/02/08 0840Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 0832Z  HANNA
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LOCATION...NEBRASKA...SOUTH DAKOTA...MONTANA...WYOMING...
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ATTN WFOS...LBF...UNR...CYS...BYZ...
ATTN RFCS...MBRFC...
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EVENT...HEAVY SNOW WITH BLIZZARD CONDITIONS
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SATELLITE ANALYSIS AND TRENDS...UPPER LOW APPEARS TO BE IN THE PROCESS
OF REDEVELOPING FURTHER SOUTH OVER CNTRL AND WESTERN PORTIONS OF NE AS
WATER VAPOR IMAGERY INDICATES AN INTENSE SHORTWAVE TROF AND ASSOCIATED
JET STREAK HAS DROPPED INTO THE BASE OF THE LARGER SCALE TROF COMPLEX.
LATEST INFRARED IMAGERY SHOWS CLASSIC COMMA SHAPED CLOUD PATTERN AND
ASSOCIATED MID LEVEL DEFORMATION ARCING FROM SE PORTIONS OF ND INTO
SE WY AND EXTREME W NE.  BEST HEAVY SNOW SIGNATURE WITHIN THIS BAND OF
DEFORMATION APPEARS TO BE FROM PERKINS/HARDING COUNTIES IN NW SD EXTENDING
SOUTH TOWARDS SHANNON/FALL RIVER COUNTIES IN SW SD.  BEST PRECIPITATION
APPEARS TO BE FOCUSING JUST WEST OF SURFACE INVERTED TROF AXIS WHICH 08Z
MESOANALYSIS PLACED ROUGHLY FROM ABOUT 10 MILES SW OF PHP TO 60 MILES
WEST OF D07.
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IR IMAGERY INDICATES THAT JET MAX NOW LIFTING NE THROUGH KS APPEARS TO
BE INCREASING LARGE SCALE ASCENT OVER PORTIONS OF CNTRL NE.  BELIEVE AS
THIS FEATURE CONTINUES NE THROUGH THE EARLY MORNING, ASCENT WILL CONTINUE
TO FOCUS OVER PORTIONS OF THE DISCUSSION AREA TO CONTINUE THE HEAVY SNOW
THREAT THROUGH AT LEAST 15-18Z.  ALTHOUGH FORECAST SOUNDINGS INDICATE THAT
MAXIMUM IN SATURATED ASCENT MAY BE OCCURRING JUST BELOW BEST DENDRITIC
SNOW GROWTH LAYER THERE IS STILL SUFFICIENT ASCENT THROUGH THE -12-18C
LAYER FOR SNOWFALL RATES IN EXCESS OF 1.0"/HR.  WOULD EXPECT THESE TYPES
OF SNOWFALL RATES TO OCCUR IN ROUGHLY N/S ORIENTED BANDS FROM E HARDING
TOWARD THE RAP AREA AND ALONG THE FAVORED NE SLOPES OF THE BLACK HILLS.
SURFACE WIND GUSTS OF 50KTS ALONG WITH THE HEAVY SNOWFALL SHOULD CONTINUE
THE BLIZZARD CONDITIONS OVER THE AREA.  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 4572 10327 4570 10218 4525 10203 4479 10235 4406 10256
4351 10220 4293 10226 4273 10316 4362 10407 4464 10429
4526 10402
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