MESOSCALE DISCUSSION 1063
   NWS STORM PREDICTION CENTER NORMAN OK
   0742 PM CDT THU JUN 11 2009
   
   AREAS AFFECTED...CENTRAL/NORTHWEST TX
   
   CONCERNING...TORNADO WATCH 378...
   
   VALID 120042Z - 120145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 378 CONTINUES.
   
   TORNADO WATCH 378 CONTINUES UNTIL 03Z...WITH PRIMARY/POTENTIALLY
   WIDESPREAD SEVERE THREAT ACROSS CENTRAL TX NEARING THE I-35
   CORRIDOR/HILL COUNTRY IN THE SHORT TERM INCLUDING THE AUSTIN
   VICINITY.
   
   WELL ORGANIZED CONVECTIVE COMPLEX WITH BOUTS OF EMBEDDED STORM SCALE
   ROTATION WILL CONTINUE TO GRADUALLY PROGRESS SOUTH-SOUTHEASTWARD
   TOWARD THE I-35 CORRIDOR/HILL COUNTRY AND GEORGETOWN/AUSTIN AREAS
   OVER THE NEXT HOUR. DISTINCT POTENTIAL FOR LARGE HAIL/DAMAGING WINDS
   WILL CONTINUE...WITH TRANSIENT CIRCULATIONS AND A VOLATILE AIRMASS
   FAVORABLE FOR AN ISOLATED/EMBEDDED TORNADO AS WELL. ALONG THESE
   LINES...A 58 KT GUST WAS RECENTLY MEASURED IN BURNETT TX AS OF
   0027Z...WITH REPORTS OF GOLFBALL TO BASEBALL SIZE HAIL IN LAMPASAS
   COUNTY. ITS NOT ENTIRELY CLEAR HOW FAR SOUTH THIS COMPLEX WILL
   SURVIVE SOUTH-SOUTHEASTWARD...BUT GIVEN ITS ORGANIZATION/EXISTING
   COLD POOL AND MODEST LOW LEVEL/HIGHLY BUOYANT INFLOW...A SUSTAINED
   THREAT AT LEAST THROUGH THE 02Z TIMEFRAME SEEMS PROBABLE. AS
   SUCH...A LOCAL SOUTHWARD EXTENSION OF THE EXISTING WATCH AND/OR AN
   ADDITIONAL WATCH ISSUANCE MAY BE WARRANTED.
   
   ELSEWHERE...WITH FAILED ATTEMPTS AT DEEP CONVECTIVE INITIATION EAST
   OF THE LUBBOCK AREA OVER THE PAST COUPLE OF HOURS...POTENTIAL FOR
   SURFACE BASED DEVELOPMENT SEEMS LOW ACROSS MUCH OF THE REMAINDER OF
   TORNADO WW 378. PENDING DEVELOPMENTAL TRENDS...SUCH PORTIONS OF WW
   378 MAY ULTIMATELY BE CANCELLED PRIOR TO 03Z.
   
   ..GUYER.. 06/12/2009
   
   
   ATTN...WFO...FWD...OUN...EWX...SJT...LUB...MAF...
   
   LAT...LON   34180118 33870012 31689747 30819668 29649814 33050109
               34180118