MESOSCALE DISCUSSION 0633
   NWS STORM PREDICTION CENTER NORMAN OK
   0334 PM CDT WED APR 29 2009
   
   AREAS AFFECTED...PORTIONS OF NWRN TX
   
   CONCERNING...TORNADO WATCH 210...
   
   VALID 292034Z - 292130Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 210 CONTINUES.
   
   AS OF 2030Z...BULK OF TSTM ACTIVITY HAD SHIFTED INTO ERN PORTIONS OF
   WW 210 AND JOINED TRAILING PORTION OF LONG-LIVED MCS THAT HAS
   TRAVERSED THE RED RIVER OVER THE PAST SEVERAL HOURS /SEE MCD 632 FOR
   DISCUSSION DOWNSTREAM OF WW 210/. THE MOST INTENSE SUPERCELL
   CENTERED OVER THROCKMORTON/YOUNG COUNTIES /WITH A HISTORY OF LARGE
   HAIL REPORTED UP TO GOLF BALL SIZE/ APPEARS TO BE EVOLVING INTO A
   BOW ECHO. GIVEN THE ORIENTATION OF THIS STORM AND WITH THE AIR MASS
   CONTINUING TO DESTABILIZE AHEAD OF IT...AN ENHANCED DAMAGING WIND
   THREAT SHOULD OCCUR OVER THE NEXT COUPLE OF HOURS. FARTHER
   WEST...TSTM OUTFLOWS SURGING WWD /EVIDENT IN VISIBLE SATELLITE
   IMAGERY/ HAVE APPEARED TO TEMPORARILY SUPPRESS ADDITIONAL TSTM
   ACTIVITY. HOWEVER...COLLISION OF OUTFLOW BOUNDARIES WITH APPROACHING
   DRYLINE MAY RESULT IN RENEWED TSTM DEVELOPMENT IN THE NEXT FEW HOURS
   AND A RESURGENCE OF SEVERE POTENTIAL.
   
   ..GRAMS.. 04/29/2009
   
   
   ATTN...WFO...FWD...OUN...SJT...LUB...MAF...
   
   LAT...LON   32329770 32119996 32130168 32680218 33660202 33840014
               34419932 33959749 32329770