MESOSCALE DISCUSSION 0906
   NWS STORM PREDICTION CENTER NORMAN OK
   0545 PM CDT TUE MAY 13 2008
   
   AREAS AFFECTED...NRN IL
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 132245Z - 132345Z
   
   ELEVATED SEVERE STORMS CONTINUE TO PRODUCE MODERATELY SEVERE HAIL
   ACROSS NRN AND CENTRAL IL.  WW IS POSSIBLE IF ACTIVITY EXPANDS
   FURTHER.
   
   INTERMITTENTLY INTENSE STORMS ARE OCCURRING NEAR THE NOSE OF 40 KT
   850 MB LLJ. STEEP MID LEVEL 700-500 MB LAPSE RATES AOA 7.5 C/KM
   CONTRIBUTE TO MUCAPE APPROACHING 2000 J/KG WSW OF THE CLUSTER. WNC
   PROFILER WINDS HAVE INCREASED TO 40 KT FROM SSW THIS PAST HOUR.
   INITIAL REPORTS AND SPC HAIL MODEL BASED ON FCST RUC PFC SUGGEST
   HAIL SIZES WILL REMAIN BELOW 1.5 IN. LLJ IS EXPECTED TO INTENSIFY 
   TO THE SW OF THREAT AREA THROUGH 04Z. RUC MUCAPE FCST SUGGESTS
   ACTIVITY WILL BUILD EWD THROUGH 03Z BEFORE DIMINISHING.
   
   ..SCHNEIDER.. 05/13/2008
   
   
   ATTN...WFO...LOT...ILX...LSX...DVN...
   
   40119027 41129025 42158963 42228872 41158793 39618772
   38968819 38998925 39478996