MESOSCALE DISCUSSION 0583
   NWS STORM PREDICTION CENTER NORMAN OK
   0134 AM CDT TUE APR 26 2011
   
   AREAS AFFECTED...SERN TX THROUGH SWRN LA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 210...
   
   VALID 260634Z - 260800Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 210
   CONTINUES.
   
   SEVERE STORMS EXPECTED TO PERSIST THROUGH SERN TX AND SWRN LA NEXT
   FEW HOURS. MAIN THREAT APPEARS TO BE TRANSITIONING TO DAMAGING WIND
   AND LARGE HAIL. STORM ON SWRN FLANK ARE NOT IN WW AND ACTIVITY MAY
   ALSO CONTINUE ALL THE WAY TO THE COAST. CURRENT PLANS ARE TO REPLACE
   TORNADO WATCH 210 WITH A SEVERE THUNDERSTORM WATCH SOON.
   
   CLUSTER OF STORMS WITH EMBEDDED SUPERCELLS CONTINUE THROUGH SWRN LA
   AND SERN TX AT 20-25 KT. RUC PFC DATA SHOW MODEST CAPPING INVERSION
   AROUND 850 MB. THE ATMOSPHERE REMAINS MODERATELY UNSTABLE IN WARM
   SECTOR SOUTH OF THE ACTIVITY. CONVERGENCE ALONG GUST FRONT AND 30-35
   KT STORM RELATIVE INFLOW MAY SUSTAIN THE STORMS ALL THE WAY TO THE
   COAST. SHEAR/INSTABILITY PARAMETER SPACE WILL SUPPORT EMBEDDED
   SUPERCELL AND BOWING STRUCTURES AS ACTIVITY DEVELOPS SWD.
   
   ..DIAL.. 04/26/2011
   
   
   ATTN...WFO...LCH...HGX...
   
   LAT...LON   30669535 31059370 31379269 31089215 30529226 30219266
               30169355 30229465 30249527 30669535