MESOSCALE DISCUSSION 0647
   NWS STORM PREDICTION CENTER NORMAN OK
   1245 PM CDT WED MAY 02 2007
   
   AREAS AFFECTED...PARTS OF W CNTRL INTO CNTRL TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 208...
   
   VALID 021745Z - 021845Z
   
   CORRECTED FOR WW NUMBER IN SECOND LINE.
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 208
   CONTINUES.
   
   A NEW TORNADO WATCH IS BEING ISSUED INCLUDING AREAS EAST OF WW 208.
   
   EVOLVING MESOSCALE CONVECTIVE SYSTEM CONTINUES SLOW EAST/
   SOUTHEASTWARD DEVELOPMENT TOWARD ABILENE...SAN ANGELO AND AREAS
   NORTHWEST OF DEL RIO.  SURFACE COLD SURGE IS ONGOING THROUGH MUCH OF
   WEST TEXAS IN THE WAKE OF THIS FEATURE...AND MAY BE ADVANCING A BIT
   AHEAD OF INTENSE LEADING LINE OF STORMS.  LIGHTNING TRENDS SUGGEST
   THAT MOST VIGOROUS RECENT DEVELOPMENT IS SHIFTING TO THE SOUTHWEST
   OF SAN ANGELO...ALONG INTERSECTION OF ADVANCING COLD FRONT AND THE
   WESTERN EDGE OF A LINGERING COLD POCKET ACROSS THE TEXAS HILL
   COUNTRY.  THIS COLD POCKET PROVIDES SOME UNCERTAINTY CONCERNING THE
   EVOLUTION OF CONVECTIVE SYSTEM THROUGH 20-21Z...BUT THE AIR MASS IS
   VERY MOIST...AND BREAKS IN CLOUD COVER MAY FINALLY ALLOW FOR
   INCREASING SURFACE HEATING/DESTABILIZATION THIS AFTERNOON.  
   
   BOUNDARY LAYER AIR MASS TO THE NORTH OF SAN ANGELO...INTO THE
   ABILENE AND BROWNWOOD AREAS HAS BEEN ABLE TO WARM/DESTABILIZATION
   ...AND OFFERS BETTER POTENTIAL FOR STRONG/SEVERE STORMS NEXT FEW
   HOURS.  OTHERWISE...MOST VIGOROUS STORMS MAY CONTINUE TO DEVELOP
   SOUTH SOUTHEASTWARD ALONG INSTABILITY AXIS ALONG THE RIO GRANDE
   RIVER.
   
   ..KERR.. 05/02/2007
   
   
   ATTN...WFO...FWD...EWX...SJT...MAF...
   
   32550034 32569868 31729802 31049850 30339857 29229880
   28839980 28690067 29300149 29890189 30280243 31000192
   31220120