MESOSCALE DISCUSSION 2154
   NWS STORM PREDICTION CENTER NORMAN OK
   0531 AM CDT THU OCT 29 2009
   
   AREAS AFFECTED...CNTRL OK INTO N-CNTRL TX
   
   CONCERNING...TORNADO WATCH 778...779...
   
   VALID 291031Z - 291200Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 778...779...CONTINUES.
   
   THE THREAT FOR ISOLATED SEVERE WEATHER IS EXPECTED TO CONTINUE
   ACROSS PARTS OF CNTRL OK INTO FAR N-CNTRL TX INTO MID MORNING. 
   CURRENT TORNADO WATCHES MAY BE REPLACED WITH A SEVERE TSTM WATCH
   SHORTLY.
   
   A QLCS HAS BECOME ESTABLISHED ALONG PACIFIC FRONT AS OF 1025Z FROM
   JUST W OF PNC SSWWD TO JUST W OF OKC TO SPS.  AS MENTIONED IN PRIOR
   DISCUSSIONS...STRONGER CONVECTIVE UPDRAFTS CONTINUE TO BE UNDERCUT
   BY COMBINATION OF CONVECTIVE OUTFLOW AND SYNOPTIC FRONT...DESPITE
   THE EWD PROGRESSION OF SYSTEM INTO AN EXCEEDINGLY MOIST AIR MASS. 
   THUS...EVEN THOUGH AMBIENT WIND FIELD REMAINS QUITE STRONG...THE
   OUTFLOW-DOMINANT...LINEAR CONVECTION MODE IS EXPECTED TO LIMIT THE
   TORNADO THREAT...AT LEAST IN THE IMMEDIATE FUTURE.  THE POTENTIAL
   FOR DAMAGING WIND GUSTS WILL CONTINUE TO EXIST WITH ANY EMBEDDED
   BOWING SEGMENTS...THEREFORE PARTS OF CURRENT TORNADO WATCHES WILL
   LIKELY BE REPLACED WITH A NEW SEVERE TSTM WATCH.
   
   ..MEAD.. 10/29/2009
   
   
   ATTN...WFO...TSA...FWD...OUN...
   
   LAT...LON   32769722 32919817 33889818 35089780 35319724 34949624
               33659546 32719654 32769722