MESOSCALE DISCUSSION 0009
   NWS STORM PREDICTION CENTER NORMAN OK
   1208 AM CST SUN JAN 04 2009
   
   AREAS AFFECTED...E-CENTRAL WI AND PARTS OF CENTRAL-NRN MI
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 040608Z - 040945Z
   
   MIXED PRECIPITATION RATES UP TO 0.05 INCH PER HOUR ARE POSSIBLE IN A
   CORRIDOR FROM E-CENTRAL WI TO PARTS OF NRN MI THROUGH 12Z.  INITIAL
   PRECIP OVER NRN MI MAY BEGIN AS SNOW/SLEET BUT TRANSITION TO
   SLEET/FZRA DURING THE LATER HALF OF THE EVENT.
   
   REGIONAL RADAR MOSAIC AT 06Z SHOWS A SWATH OF GENERALLY LIGHT
   REFLECTIVITIES ACROSS NERN WI EXTENDING NWD INTO THE MI U.P. AND A
   BAND OF LIGHT PRECIP OVER S-CENTRAL WI.  THE BACK EDGE OF THE
   APPRECIABLE PRECIPITATION RATES WITH INITIAL WAA INDUCED PRECIP
   APPEARS TO BE ASSOCIATED ALONG AND NEAR A 850MB
   CONFLUENCE/BAROCLINIC ZONE LIFTING TO THE NE OVER THE DOOR PENINSULA
   AND WRN MI.  OBSERVED PRECIPITATION OF 0.15 INCH PER 3 HOUR PERIOD
   HAS BEEN REPORTED WITH THIS ZONE OF PRECIP IN E-CENTRAL WI LATE THIS
   EVENING.
   AS THE SHORTWAVE TROUGH GLANCES THE REGION OVERNIGHT...AMPLE UVV/S
   AND STRONG LOW LEVEL ISENTROPIC ASCENT ARE OCCURRING -- EVIDENT BY
   RECENT GRB VWP DATA /50 KT 850MB JET/.  LOW LEVEL MOISTURE ADVECTION
   /AREA GPS PW DATA INCREASING TO AOA 0.50 INCH/ INTO THE REGION WILL
   LIKELY CONTINUE...AND SUPPORT SUFFICIENT MIXED PRECIPITATION RATES
   DURING THE OVERNIGHT HOURS OVER PARTS OF ERN WI AND CENTRAL-NRN MI.
   
   ..SMITH.. 01/04/2009
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...APX...GRR...MQT...GRB...MKX...ARX...
   
   LAT...LON   44938366 44068412 43208614 43338823 43138963 43868968
               45448815 46178769 46678572 46428428 44938366