MESOSCALE DISCUSSION 0847
   NWS STORM PREDICTION CENTER NORMAN OK
   0814 PM CDT FRI MAY 09 2008
   
   AREAS AFFECTED...SOUTH CENTRAL AND CENTRAL TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 289...
   
   VALID 100114Z - 100215Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 289
   CONTINUES.
   
   ISOLATED STORMS OVER CENTRAL TX /CURRENTLY LOCATED IN BURNET AND
   LAMPASAS COUNTIES/ WILL CONTINUE TO POSE A SEVERE WEATHER THREAT
   THROUGH ABOUT 03Z.
   
   EARLY EVENING SURFACE ANALYSIS SHOWED A COLD FRONT MOVING SLOWLY SWD
   THROUGH ERN AND CENTRAL TX...AND EXTENDED FROM NRN LA SWWD TO 40 S
   TYR TO 10 S ACT INTO SW TX.  ONGOING ACTIVITY OVER CENTRAL TX HAD
   DEVELOPED ALONG A PRE-FRONTAL SURFACE TROUGH...WITH REGIONAL RADARS
   INDICATING STRONGEST ACTIVITY IS NOW LOCATED BETWEEN THESE TWO
   BOUNDARIES.  PRIOR TO THE ONSET OF BOUNDARY LAYER COOLING/
   STABILIZATION WITH THE LOSS OF DAY TIME HEATING...STRONG TO SEVERE
   STORMS WILL CONTINUE TO DEVELOP AND MOVE ENEWD THROUGH THE FAR NRN
   PART OF WW 289 AND N OF THIS WW TOWARD TPL/ACT WHERE AIR MASS
   REMAINS MODERATELY UNSTABLE AND STRONGLY SHEARED.  GIVEN EXPECTED
   DIURNAL WEAKENING TREND DURING THE NEXT 2 HOURS AND SMALL AREAL
   COVERAGE N/NE OF WW 289...A NEW WW DOES NOT APPEAR WARRANTED.
   
   LEFT MOVING STORMS AND ACTIVITY THAT MOVES N OF THE COLD FRONT
   SHOULD WEAKEN...SINCE AIR MASS IS MORE STABLE WITHIN POST FRONTAL
   ENVIRONMENT.
   
   ..PETERS.. 05/10/2008
   
   
   ATTN...WFO...FWD...EWX...SJT...
   
   30709700 30509754 30519854 30809884 31339853 31529821
   31659661 31549624 31009640