MESOSCALE DISCUSSION 0067
   NWS STORM PREDICTION CENTER NORMAN OK
   1036 AM CST TUE FEB 01 2011
   
   AREAS AFFECTED...NRN MO...SRN IA...WRN IL
   
   CONCERNING...BLIZZARD 
   
   VALID 011636Z - 012230Z
   
   SNOWFALL WILL EXPAND N/EWD AHEAD OF AN INTENSE MID-LEVEL IMPULSE
   PIVOTING TOWARDS THE MID-MS RIVER VALLEY. SNOWFALL RATES WILL
   INCREASE TO 2-3 IN/HR ACROSS NRN MO...AND INTO WRN IL AFTER 20Z.
   STRENGTHENING N-NWLY BOUNDARY LAYER WINDS MAY PRODUCE NEAR BLIZZARD
   CONDITIONS.
   
   CURRENT RADAR TRENDS AND SHORT-TERM FORECAST MODEL OUTPUT INDICATE A
   NEWD SHIFT OF HEAVIEST SNOWFALL BANDS INTO NRN MO AND WRN IL. THIS
   WILL OCCUR COINCIDENT WITH INCREASING DEEP-LAYER ASCENT ASSOCIATED
   WITH UPPER-LEVEL DIFFLUENCE AND DCVA AHEAD OF MIDLEVEL IMPULSE
   CURRENTLY OVER CNTRL OK. SIGNIFICANT ISENTROPIC UPGLIDE ASSOCIATED
   WITH WARM CONVEYOR BELT WRAPPING AROUND APPROACHING CYCLONE /WITH
   40-50 KTS OF FLOW IN 285-295 K LAYER/ WILL ACT TO ENHANCE DEEP-LAYER
   ASCENT. FOCUSED MESOSCALE BANDING /WITH SOME CONVECTIVE ENHANCEMENT
   FROM SIGNIFICANT AMOUNT OF SLANTWISE INSTABILITY/ WILL BE SUPPORTED
   BY LOW-MIDLEVEL FRONTOGENETIC MAXIMUM SHIFTING INTO NRN MO.
   WIDESPREAD SNOWFALL RATES ARE EXPECTED TO RANGE BETWEEN 2-3 IN/HR
   ACROSS MUCH OF NRN MO...SPREADING INTO WRN IL AFTER 20Z. LOCALLY
   HIGHER SNOWFALL RATES WILL BE POSSIBLE WITHIN THE MOST INTENSE
   MESOSCALE BANDS. ACROSS SRN IA...SNOWFALL RATES SHOULD GENERALLY
   RANGE BETWEEN 1-2 IN/HR.
   
   ..ROGERS.. 02/01/2011
   
   
   ATTN...WFO...LOT...ILX...LSX...DVN...SGF...DMX...EAX...
   
   LAT...LON   39248998 38399113 37259317 38109478 40459441 41679315
               42049073 41468958 40718875 39748922 39248998