MESOSCALE DISCUSSION 0592
   NWS STORM PREDICTION CENTER NORMAN OK
   0600 AM CDT THU MAY 02 2013
   
   AREAS AFFECTED...SERN MN / NWRN WI
   
   CONCERNING...HEAVY SNOW 
   
   VALID 021100Z - 021500Z
   
   SUMMARY...A CORRIDOR OF CONVECTIVELY AUGMENTED SNOWFALL RATES AROUND
   1 INCH PER HOUR PROBABLE THROUGH 15 UTC.
   
   DISCUSSION...A MESOSCALE BAND OF ENHANCED SNOWFALL RATES HAS MOVED
   LITTLE DURING THE PAST SEVERAL HOURS...WITH LITTLE EWD MOVEMENT
   EXPECTED THROUGH THE MID MORNING.  THE NLDN HAS DETECTED SPORADIC
   LIGHTNING STRIKES OVER NERN IA AND FAR SERN MN...INDICATIVE OF
   DEEPER CONVECTION /PER IR IMAGERY/ AND CORRESPONDINGLY HIGHER PRECIP
   RATES.  SURFACE OBSERVATIONS SHOW A NARROW CORRIDOR OF NEAR FREEZING
   TEMPS FROM N-CNTRL IA NNEWD INTO NWRN WI...PREFERENTIALLY FAVORING
   WHERE THE HEAVIEST PRECIP RATES ARE LOCATED.  
   
   ONLY A SLIGHT EWD SHIFT OF H8 FRONTOGENESIS IS FORECAST THROUGH MID
   MORNING.  GIVEN ONLY SLOW EWD MOVEMENT OF THE LARGE-SCALE CNTRL U.S.
   UPPER TROUGH THROUGH THE MID MORNING HOURS...EXPECTING A
   CONTINUATION OF FAVORABLE ZONE OF ASCENT AND FAVORABLE SW-NE
   ORIENTED FETCH OF TRAINING CONVECTION RESULTING IN MODERATE-HEAVY
   SNOWFALL RATES.
   
   ..SMITH.. 05/02/2013
   
   
   ATTN...WFO...DLH...ARX...MPX...
   
   LAT...LON   43589304 46169143 46059096 45889097 43479232 43339285
               43589304