MESOSCALE DISCUSSION 0879
   NWS STORM PREDICTION CENTER NORMAN OK
   1024 PM CDT SUN MAY 22 2011
   
   AREAS AFFECTED...SRN IL THROUGH SERN MO
   
   CONCERNING...TORNADO WATCH 334...
   
   VALID 230324Z - 230430Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 334 CONTINUES.
   
   THREAT FOR MAINLY DAMAGING WIND AND AN ISOLATED TORNADO OR TWO
   PERSISTS ACROSS REMAINING PORTION OF WW 334 OVER SRN IL AND SERN MO.
   STORMS WILL BEGIN TO MOVE EAST OF WW SHORTLY. WW CAN BE LOCALLY
   EXTENDED AS NEEDED IN THE LINCOLN AND PADUCAH WFOS...BUT ANOTHER WW
   DOWNSTREAM ACROSS IN IS NOT EXPECTED AT THIS TIME.
   
   STORMS HAVE EVOLVED INTO A PREDOMINANT LINEAR MODE FROM CNTRL IL
   SWWD THROUGH ERN MO. OTHER MORE DISCRETE STORMS ARE DEVELOPING IN
   THE WARM ADVECTION REGIME EAST OF THE LINE ACROSS EXTREME SERN IL
   INTO SWRN IND. THESE ARE LIKELY ELEVATED ABOVE THE SURFACE LAYER.
   THE LINE IS EMBEDDED WITHIN FAVORABLE 0-2 KM HODOGRAPHS FOR EMBEDDED
   MESOCYCLONES AND BOWING SEGMENTS. DAMAGING WIND AS WELL AS A COUPLE
   OF QLCS-TYPE TORNADOES REMAIN POSSIBLE NEXT HOUR OR TWO.
   HOWEVER...THE STORMS WILL SOON BEGIN MOVING EAST OF MOIST AXIS WHERE
   DEWPOINTS ARE ONLY AROUND 60 F WITH MARGINAL MLCAPE. THIS SUGGEST
   THE ACTIVITY SHOULD BEGIN TO UNDERGO A WEAKENING TREND AS THEY
   CONTINUE EWD.
   
   ..DIAL.. 05/23/2011
   
   
   ATTN...WFO...IND...PAH...ILX...MEG...LSX...
   
   LAT...LON   39298841 39808818 39938743 39218736 38588810 37768920
               36618993 36679071 37119057 37789032 38218968 38688885
               39298841