MESOSCALE DISCUSSION 0111
   NWS STORM PREDICTION CENTER NORMAN OK
   0327 AM CST SAT FEB 04 2012
   
   AREAS AFFECTED...ERN NEB/WRN IA
   
   CONCERNING...HEAVY SNOW 
   
   VALID 040927Z - 041330Z
   
   INCH AN HOUR SNOWFALL RATES /GREATER IN THUNDERSNOW/ WILL GRADUALLY
   TAPER OFF LATER THIS MORNING. CESSATION OF HEAVIER RATES IS ALREADY
   ONGOING ACROSS CNTRL NEB.
   
   HEAVY SNOWFALL HAS DEVELOPED IN THE FAVORED LEFT EXIT REGION OF A
   MID-UPPER LEVEL JET...NOW QUICKLY PROGRESSING NEWD. WITH THE
   LESSENING OF MORE SUPPORTIVE VERTICAL MOTION...RATES SHOULD
   GRADUALLY BEGIN TO TAPER OFF THIS MORNING. UNTIL THEN...WEAK MID
   LEVEL INSTABILITY /ROOTED AT 600-450 MB/ HAS SUPPORTED THE
   OCCASIONAL LIGHTNING STRIKE ACROSS SRN NEB. THIS AREA OF ENHANCED
   CONVECTIVE SNOWFALL POTENTIAL WILL SHIFT INTO SRN IA OVER THE NEXT
   FEW HOURS. BRIEF BURSTS OF HEAVIER SNOW REMAIN POSSIBLE IN
   THUNDERSNOW.
   
   ..HURLBUT.. 02/04/2012
   
   
   ATTN...WFO...DMX...EAX...OAX...TOP...GID...
   
   LAT...LON   41719543 41339465 40749509 39989670 39829767 40239849
               41049753 41439676 41719543