MESOSCALE DISCUSSION 0279
   NWS STORM PREDICTION CENTER NORMAN OK
   0335 PM CDT TUE MAR 13 2007
   
   AREAS AFFECTED...PARTS OF NRN AND CENTRAL TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 60...
   
   VALID 132035Z - 132200Z
   
   STORMS/LIMITED SEVERE THREAT CONTINUE ACROSS WW.
   
   CONVECTION IS ONGOING ACROSS NRN PORTIONS OF WW...AND HAS BECOME
   INCREASINGLY WIDESPREAD ACROSS THE SRN HALF OF WW -- WHERE A
   COMMENSURATE DECREASE IN INSTABILITY IS NOTED.  MEANWHILE...STORMS
   ARE DEVELOPING/MOVING EWD INVOF THE HIGHER TERRAIN OF NRN MEXICO
   W/SW OF DRT -- WITHIN UNDISTURBED/UNSTABLE AIRMASS.
   
   THOUGH A LIMITED SEVERE THREAT CONTINUES ACROSS N TX AND ADJACENT
   SRN OK...THREAT HAD DECREASED ACROSS THE SERN QUARTER OF WW WHERE
   WIDESPREAD CONVECTION IS ONGOING.  GREATEST SEVERE POTENTIAL APPEARS
   TO EXIST FROM THE SWRN QUARTER OF WW WWD TOWARD DRT...WHERE A WEAK
   DRY LINE APPEARS TO BE EVOLVING AHEAD OF UPPER LOW WHICH HAS NOW
   BEGUN PROGRESSING EWD.  SHEAR/INSTABILITY COMBINATION ACROSS THIS
   REGION IS SUFFICIENT FOR SUPERCELLS...AND ASSOCIATED THREAT FOR
   HAIL/DAMAGING WINDS.  WE CONTINUE TO MONITOR THIS REGION FOR
   POSSIBLE NEW WW...OR THE POSSIBLE ADDITION OF SEVERAL COUNTIES W OF
   WW 60 INTO THIS WW.
   
   ..GOSS.. 03/13/2007
   
   
   ATTN...WFO...SHV...HGX...FWD...OUN...CRP...EWX...SJT...
   
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