MESOSCALE DISCUSSION 0533
   NWS STORM PREDICTION CENTER NORMAN OK
   0506 AM CDT SAT APR 23 2011
   
   AREAS AFFECTED...NERN OK...SWRN MO...NWRN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 183...
   
   VALID 231006Z - 231030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 183
   CONTINUES.
   
   DEPENDING ON CONVECTIVE TRENDS NEXT 30 MIN OR SO...SEVERE
   THUNDERSTORM WATCH 183 MAY NEED TO BE REPLACED BY ANOTHER WW BEFORE
   ITS EXPIRATION TIME OF 11Z. SOME THREAT FOR ISOLATED LARGE HAIL AND
   POSSIBLY DAMAGING WIND MAY CONTINUE FROM NERN OK...NWRN AR INTO SRN
   MO.
   
   A 40-50 KT SWLY LLJ WILL MAINTAIN ISENTROPIC LIFT NORTH OF STALLED
   BOUNDARY FOR ELEVATED STORMS TO INCREASE FROM NERN OK SPREADING EWD
   THROUGH NWRN AR AND SRN MO. STORMS DEVELOPING OVER NERN OK ARE IN
   CLOSER PROXIMITY TO STRONGER INSTABILITY AND FEED OF HIGHER THETA-E
   AIR...WHILE INSTABILITY DECREASES WITH ERN EXTENT INTO SRN MO AND
   NWRN AR BASED ON LATEST OBJECTIVE ANALYSIS. THE PRIMARY THREAT IS
   EXPECTED TO BE ISOLATED LARGE HAIL...BUT IF STORMS GROW UPSCALE THE
   THREAT FOR DAMAGING WIND COULD ALSO INCREASE.
   
   ..DIAL.. 04/23/2011
   
   
   ATTN...WFO...LZK...SGF...TSA...
   
   LAT...LON   35909311 35679470 35779595 36629595 37369381 37699166
               36819132 35909311