MESOSCALE DISCUSSION 0206
   NWS STORM PREDICTION CENTER NORMAN OK
   1248 AM CST SUN FEB 25 2007
   
   AREAS AFFECTED...SERN/E-CNTRL MN...FAR NERN IA...MUCH OF WI
   
   CONCERNING...HEAVY SNOW 
   
   VALID 250648Z - 251045Z
   
   HEAVY SNOW AXIS ACROSS SERN MN/NERN IA/SRN WI WILL SLOWLY PIVOT
   N/NEWD OVERNIGHT. SNOWFALL RATES OF 1 TO 2 IN/HR WILL REMAIN LIKELY
   WITH LOCALLY HIGHER RATES IN EMBEDDED CONVECTIVE ELEMENTS. IN
   ADDITION...SUSTAINED ELY WINDS AROUND 20 KTS WILL LEAD TO CONTINUED
   AREAS OF BLOWING SNOW. OVERALL SNOWFALL INTENSITY SHOULD DIMINISH
   ACROSS ERN MN...NERN IA AND WRN WI...ESPECIALLY AFTER 09Z. 
   
   RADAR IMAGERY AND SURFACE OBSERVATIONS INDICATE A SUBSTANTIAL AREA
   OF MODERATE TO HEAVY SNOW HAS BEEN SLOWLY EXPANDING NWD OVER THE
   PAST FEW HOURS. OCCASIONAL CG LIGHTNING STRIKES CONTINUE WITHIN THIS
   AREA...SUGGESTIVE OF WEAK MID-LEVEL STATIC STABILITY/SLANTWISE
   CONVECTION. AS THE POTENT CYCLONE NEAR LWD UNDERGOES FURTHER
   OCCLUSION OVERNIGHT...MID-LEVEL ISENTROPIC LIFT SHOULD WEAKEN WITH
   MORE SUBSTANTIAL WARM/MOIST ADVECTION OCCURRING FURTHER DOWNSTREAM
   OVER THE LOWER GREAT LAKES. THIS WILL AID IN DIMINISHING SNOWFALL
   RATES ACROSS NERN IA/ERN MN. HOWEVER...SUBSTANTIAL LOW-LEVEL
   ISENTROPIC LIFT OUGHT TO CONTINUE FOR THE NEXT SEVERAL HOURS FURTHER
   E OVER CNTRL/ERN WI AS A VERY STRONG LLJ /70+ KT PER WIND PROFILERS/
   LIFTS SLOWLY NWD OVERNIGHT. BY 12Z...THE AXIS OF HEAVY SNOW WILL
   LIKELY BE CENTERED FROM AROUND GRB TO AUW TO 60 S ASX.
   
   ..GRAMS.. 02/25/2007
   
   
   ATTN...WFO...GRB...MKX...DLH...ARX...MPX...
   
   46229186 45848970 45558875 44958728 43178784 42858835
   42898938 42999057 43229186 43769277 44399333 45319380
   45969322