MESOSCALE DISCUSSION 0910
   NWS STORM PREDICTION CENTER NORMAN OK
   0651 PM CDT MON MAY 23 2011
   
   AREAS AFFECTED...W-CNTRL AND CNTRL OK INTO NWRN TX.
   
   CONCERNING...TORNADO WATCH 345...
   
   VALID 232351Z - 240115Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 345 CONTINUES.
   
   THE THREAT FOR LARGE HAIL...ISOLATED TORNADOES AND LOCALLY DAMAGING
   WIND SHOULD PERSIST THROUGH ABOUT MID EVENING FROM W-CNTRL THROUGH
   CNTRL OK INTO NWRN TX.
   
   DISCRETE SUPERCELLS THAT INITIATED EARLIER ALONG DRYLINE CONTINUE
   SLOWLY EWD THROUGH W-CNTRL OK INTO NWRN TX. THE ATMOSPHERE REMAINS
   STRONGLY UNSTABLE WITH 3000-3500 J/KG MLCAPE. LOW LEVEL
   HODOGRAPHS...WHILE NOT EXCEPTIONALLY LARGE WITH 0-1 KM STORM
   RELATIVE HELICITY FROM 150-200 M2/S2...WILL FURTHER INCREASE IN SIZE
   AS LLJ STRENGTHENS. THIS SUGGESTS A WINDOW REMAINS FOR ISOLATED
   TORNADOES BEFORE THE BOUNDARY LAYER COOLS AND INCREASING CONVECTIVE
   INHIBITION OVERWHELMS THE UPDRAFTS.
   
   STORMS IN NWRN OK APPEAR TO BE CONSOLIDATING INTO A SMALL
   CLUSTER...AND THIS ACTIVITY MIGHT EVENTUALLY EVOLVE INTO A FORWARD
   PROPAGATING BOW ECHO AND CONTINUE SEWD ALONG PRE-EXISTING OUTFLOW
   BOUNDARY.
   
   ..DIAL.. 05/23/2011
   
   
   ATTN...WFO...FWD...OUN...
   
   LAT...LON   36689752 35839681 34989681 33709810 33459881 33929915
               36559834 36689752