MESOSCALE DISCUSSION 0592
   NWS STORM PREDICTION CENTER NORMAN OK
   0301 PM CDT TUE APR 26 2011
   
   AREAS AFFECTED...EAST-CENTRAL/SOUTH-CENTRAL TX AND TX HILL COUNTRY
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 262001Z - 262130Z
   
   MONITORING DEVELOPMENTAL TRENDS FOR THE POSSIBILITY OF A TORNADO
   WATCH ACROSS PORTIONS OF SOUTH-CENTRAL/EAST-CENTRAL TX AND THE TX
   HILL COUNTRY.
   
   VISIBLE SATELLITE IMAGERY REFLECTS AN INCREASING/DEEPENING CU FIELD
   IN VICINITY OF A SOUTH-CENTRAL TX/HILL COUNTRY DRYLINE. THE EXACT
   COVERAGE OF EVENTUAL DEEP CONVECTION IS A BIT UNCERTAIN WITH
   SOUTHWARD EXTENT GIVEN THE PRESENCE OF A STRONG EML...BUT AT LEAST
   MODEST HEIGHT FALLS/UPPER FORCING IS EXPECTED TO GRAZE THE REGION.
   ALONG THESE LINES...AN ASSORTMENT OF NUMERICAL GUIDANCE...SUCH AS
   THE 12Z ECMWF AND VARIOUS 15Z SREF MEMBERSHIP...IMPLY THE
   POSSIBILITY OF AT LEAST ISOLATED DEEP CONVECTIVE DEVELOPMENT AS FAR
   SOUTH AS THE AUSTIN-SAN ANTONIO AREAS AND ADJACENT HILL COUNTRY.
   WHERE SURFACE BASED DEVELOPMENT DOES OCCUR...VERY STEEP LAPSE RATES
   AND STRONG INSTABILITY /3000-4000 J PER KG MLCAPE/ COUPLED WITH
   STRONG/VEERING WIND PROFILES WILL BE MORE THAN ADEQUATE FOR
   SUPERCELLS CAPABLE OF LARGE HAIL AND SOME TORNADOES.
   
   ..GUYER.. 04/26/2011
   
   
   ATTN...WFO...HGX...FWD...CRP...EWX...
   
   LAT...LON   30809503 28359780 29039910 29889884 30529815 30599688
               31399533 30809503