MESOSCALE DISCUSSION 0880
   NWS STORM PREDICTION CENTER NORMAN OK
   1146 PM CDT SUN MAY 22 2011
   
   AREAS AFFECTED...ERN OK THROUGH NRN AR
   
   CONCERNING...TORNADO WATCH 334...
   
   VALID 230446Z - 230615Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 334 CONTINUES.
   
   PRIMARY THREAT APPEARS TO HAVE TRANSITIONED TO DAMAGING WIND AND
   LARGE HAIL. HOWEVER...ISOLATED TORNADOES REMAIN POSSIBLE. LINE OF
   STORMS MAY EVENTUALLY MOVE INTO WRN TN AND ERN PORTION OF WW 335
   COULD BE LOCALLY EXTENDED IF NECESSARY.
   
   STORMS CONTINUE DEVELOPING FROM ERN OK THROUGH NRN AR PRIMARILY IN
   ASSOCIATION WITH ISENTROPIC LIFT PRODUCED BY A 50 KT SWLY LLJ
   INTERACTING WITH PRE-EXISTING OUTFLOW BOUNDARY. STORMS ACROSS NRN AR
   HAVE EVOLVED INTO A FORWARD PROPAGATING MCS...AND THESE STORMS ARE
   APPROACHING ERN PORTION OF WW 335. SOME THREAT FOR DAMAGING WIND AND
   PERHAPS A TORNADO OR TWO COULD CONTINUE AS THE LINE ADVANCES SEWD
   THROUGH NERN AR AND WRN TN. OTHER STORMS DEVELOPING ALONG WRN END OF
   OUTFLOW BOUNDARY ACROSS NWRN AR HAVE MAINTAINED SUPERCELL
   CHARACTERISTICS AND MAY STILL BE CAPABLE OF PRODUCING A COUPLE OF
   TORNADOES. HOWEVER...NUMEROUS STORM MERGERS ARE IMMINENT AND THIS
   ACTIVITY MAY SOON EVOLVE INTO A SMALL CLUSTER.
   
   ..DIAL.. 05/23/2011
   
   
   ATTN...WFO...PAH...MEG...LZK...TSA...
   
   LAT...LON   36399410 35979200 36608993 36468921 35948937 34769169
               35119536 36399410