MESOSCALE DISCUSSION 0187
   NWS STORM PREDICTION CENTER NORMAN OK
   0316 AM CST TUE MAR 16 2004
   
   AREAS AFFECTED...ERN IL THROUGH CNTRL AND N CNTRL IND
   
   CONCERNING...HEAVY SNOW 
   
   VALID 160916Z - 161315Z
   
   SNOWFALL RATES ARE EXPECTED TO INCREASE TO 1 TO 2 INCHES PER HOUR 
   ACROSS ERN IL AND CNTRL IND THROUGH MID MORNING.
   
   EARLY THIS MORNING...HEAVY SNOW IS ALREADY ONGOING IN A BAND ACROSS
   WRN/CNTRL IL. A STRONG SHORTWAVE TROUGH WAS MOVING EWD THROUGH THE
   MID MS VALLEY AND AS THIS FEATURE PROGRESSES EWD...ASCENT WILL
   INCREASE IN THE PRE-EXISTING DEFORMATION ZONE FROM ERN IL THROUGH
   IND...WITHIN A FAVORABLE LAYER FOR DENDRITIC SNOW GROWTH. STEEPENING
   MID LEVEL LAPSE RATES ACCOMPANYING THE UPPER TROUGH WILL ALSO
   SUPPORT SOME CONVECTIVE ENHANCEMENT...YIELDING LOCALLY MODERATE TO
   HEAVY SNOWFALL RATES THROUGH AT LEAST MID MORNING.
   
   ..DIAL.. 03/16/2004
   
   
   ATTN...WFO...ILN...IWX...IND...LOT...ILX...
   
   39958854 40758774 40668513 39538511 39558757