ZCZC NFDSPENES ALL
SPENES
SDZ000-NDZ000-MTZ000-WYZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 05/02/08 0221Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12: 0210Z		DS
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LOCATION...NW SOUTH DAKOTA...SW NORTH DAKOTA...E MONTANA...NE WYOMING...
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ATTN WFOS...ABR...BIS...UNR...BYZ...GGW...RIW...
ATTN RFCS...MBRFC...
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EVENT...MIX OF RAIN/SNOW CONTINUES ACROSS PARTS OF SD/ND/MT/WY
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SATELLITE ANALYSIS AND TRENDS...WV LOOP SHOWS UPPER LOW OVER ERN SD WITH
COLD FRNT EXTENDING SEWD AND THEN S ACROSS THE PLAINS WHERE MULTIPLE
GROUPS OF TSTORMS ARE FIRING. DEFORMATION ZONE WHICH CURRENTLY EXTENDS
NEWD FROM THE SFC LOW INTO NW SD AND PERHAPS JUST A BIT FARTHER INTO SE
MT HAS BEEN THE FOCUS FOR MOD RAIN AND FARTHER W SNOW FOR MUCH OF THE
DAY AS THE UPPER LOW PULLS NWD. IN ADDITION..A WIDE AREA OF UPPER LVL
DIFFLUENCE EXISTS PER RECENT GOES STLT WINDS STARTING FROM NE WY AND
COVERING ERN MT/SW ND/ AND WRN SD. 00Z PW ANALYSIS SHOWED PW VALUES OF
0.88" AT ABR AND THE MOISTURE PLUME EXTENDING WNWWD JUST SW OF BIS TWDS
E CENTRAL MT. RECENT VWP'S DEPICT THE 850MB WIND OF 35-45 KTS OVER SRN
MN/NE SD AS THE FLOW IS QUICKLY WRAPPED WEST AROUND THE LOW AFTER COMING
NWD OUT OF IA. THEN THE 850MB FLOW IS SEEN WRAPPING AROUND THE BACKSIDE
OF THE LOW TWDS THE S/SE ACROSS THE WRN END OF THE STATE.
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MANY OVERSHOOTING TOPS CAN BE SEEN IN LAST VIS IMAGES OF THE DAY OVER ERN
SD EXTENDING WWD ALONG AND JUST S OF THE ND/SD BORDER UNTIL THE CHANGEOVER
TO SNOW TAKES PLACE OVER THE FAR WRN END OF THE STATE. OBJECTIVE ANALYSIS
INDICATES SFC THETA-E NOSES NWWD ACROSS SD TO THE SW CORNER OF ND BEFORE
RETURNING S/SEWD ALONG THE SD AND MT/WY BORDER TO KRAP. SOME OF THESE
AREAS WRN SD/E MT/NE WY ARE ALREADY COLD ENOUGH THAT THE PRECIP IS IN
THE FORM OF WET SNOW BUT IF NOT..NRLY SFC/LOW LVL FLOW WRAPPING THROUGH
ERN MT SHOULD HELP TO COOL THE SFC JUST ENOUGH IN SW ND/WRN SD FOR SNOW
OVERNIGHT. EXPECT THAT WITH THE GOOD UPPER LVL DIFFLUENCE/POSITIONING
OF UPPER LOW AND WRAP AROUND 850MB FLOW/MOISTURE HEAVIEST SNOW OVERNIGHT
WILL BE OVER WRN SD..PARTICULARLY NEAR THE MT/WY BORDER. COULD EASILY SEE
OVER A FOOT OF SNOW IN PARTS OF NW SD OVER THE NEXT 12 HRS AS BLIZZARD
CONDITIONS BEGIN TO DVLP. SEE WEB ADDRESS IN ABOUT 10-15 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 4771 10666 4696 9944 4421 10071 4451 10683
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