MESOSCALE DISCUSSION 0934
   NWS STORM PREDICTION CENTER NORMAN OK
   0448 PM CDT TUE MAY 24 2011
   
   AREAS AFFECTED...CNTRL OK THROUGH N-CNTRL TX
   
   CONCERNING...TORNADO WATCH 356...
   
   VALID 242148Z - 242315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 356 CONTINUES.
   
   SUPERCELLS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES AND VERY
   LARGE HAIL WILL MOVE INTO CNTRL OK AND N-CNTRL TX...LIKELY AFFECTING
   THE OKLAHOMA CITY AND DALLAS-FORT WORTH METRO AREAS BETWEEN 5 AND 7
   PM THIS EVENING. GREATEST THREAT CURRENTLY APPEARS ACROSS CNTRL AND
   S-CNTRL OK.
   
   A LINE OF DISCRETE SUPERCELLS THAT INITIATED ALONG THE DRYLINE
   EXTENDS FROM NEAR ENID IN N-CNTRL OK SWD TO NEAR MINERAL WELLS IN
   N-CNTRL TX. THE DOWNSTREAM ATMOSPHERE IS VERY UNSTABLE WITH
   3000-4000 J/KG MLCAPE...VERY STEEP LAPSE RATES AND A MOIST BOUNDARY
   LAYER. THE TWIN LAKES VWP ALREADY INDICATE VERY STRONG /60-70 KT/
   SFC-6 KM SHEAR AND LARGE HODOGRAPHS WITH 300+ M2/S2 0-1 KM STORM
   RELATIVE HELICITY. SEVERAL TORNADOES HAVE ALREADY BEEN
   CONFIRMED...AND THIS PARAMETER SPACE WILL CONTINUE TO SUPPORT
   SUPERCELLS CAPABLE OF LONG TRACK...DAMAGING TORNADOES AND VERY LARGE
   HAIL AS STORMS MOVE THROUGH CNTRL OK AND N-CNTRL TX NEXT FEW HOURS.
   
   ..DIAL.. 05/24/2011
   
   
   ATTN...WFO...TSA...FWD...OUN...
   
   LAT...LON   32799852 35419837 36539807 36869648 35609625 32769682
               32799852