MESOSCALE DISCUSSION 0052
   NWS STORM PREDICTION CENTER NORMAN OK
   0119 PM CST FRI JAN 28 2011
   
   AREAS AFFECTED...NERN MN...MN ARROWHEAD INTO NORTHWEST WI
   
   CONCERNING...HEAVY SNOW 
   
   VALID 281919Z - 282215Z
   
   HEAVY SNOW MAY DEVELOP ACROSS PARTS OF NORTHEASTERN MINNESOTA AND
   NORTHWEST WISCONSIN LATE THIS AFTERNOON AND EVENING.
   
   MUCH AS SUGGESTED BY RUC FORECAST SOUNDINGS...EVAPORATIVE COOLING OF
   PRECIPITATION FALLING FROM HIGH-LEVEL CONVECTION DOWNSTREAM OF A
   SIGNIFICANT DIGGING SHORT WAVE IMPULSE IS LIKELY SATURATING THE
   MID-LEVEL ENVIRONMENT ACROSS NORTH CENTRAL/NORTHEAST MINNESOTA INTO
   NORTHWEST WISCONSIN.  A GRADUAL INCREASE IN SURFACE SNOW RATES
   APPEARS PROBABLE DURING THE NEXT SEVERAL HOURS WITH THE APPROACH OF
   THE UPPER IMPULSE...AS LARGE-SCALE ASCENT INCREASES ALONG A
   STRENGTHENING NORTHWEST TO SOUTHEAST ORIENTED LOWER/MID TROPOSPHERIC
   BAROCLINIC ZONE.  GUIDANCE SUGGESTS THAT LIFT ACROSS NORTHEASTERN
   MINNESOTA WILL BECOME MAXIMIZED WITHIN THE LAYER FAVORABLE FOR LARGE
   DENDRITIC ICE CRYSTAL GROWTH BY 21-23Z... GENERALLY ALONG A CORRIDOR
   CENTERED NEAR/WEST OF INTERNATIONAL FALLS INTO AREAS NEAR/EAST OF
   DULUTH.  CONDITIONS APPEAR FAVORABLE FOR 1 INCH PER HOUR SNOW
   RATES...WHICH COULD EXPAND SOUTHEASTWARD INTO PARTS OF NORTHWESTERN
   WISCONSIN BY 00-02Z...BEFORE FORCING WANES AND SPREADS OFF TO THE
   EAST SOUTHEAST LATER THIS EVENING.
   
   ..KERR.. 01/28/2011
   
   
   ATTN...WFO...DLH...MPX...
   
   LAT...LON   48649315 48089176 47419118 46499042 45629095 45659213
               46149274 46799310 48309381 48649315