MESOSCALE DISCUSSION 0643
   NWS STORM PREDICTION CENTER NORMAN OK
   0313 AM CDT THU APR 30 2009
   
   AREAS AFFECTED...N TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 215...
   
   VALID 300813Z - 300945Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 215
   CONTINUES.
   
   THE POTENTIAL FOR DAMAGING WINDS AND LARGE HAIL WILL CONTINUE ACROSS
   CNTRL/SRN PORTIONS OF WW.  THIS THREAT MAY BEGIN TO SPREAD E/SE OF
   WW 215 BETWEEN 09-10Z AND CONVECTIVE TRENDS ARE BEING MONITORED FOR
   AN ADDITIONAL WW.
   
   AS OF 0800Z...LEADING EDGE OF MCS EXTENDED FROM FANNIN SWWD THROUGH
   COLLIN AND DENTON COUNTIES WITH A SYSTEM MOTION OF 300/35 KT.  WHILE
   THIS LEADING LINE OF STORMS HAS SHOWN SOME SLIGHT WEAKENING OVER THE
   PAST HOUR...ADDITIONAL...INTENSE STORMS HAVE DEVELOPED ATOP TRAILING
   COLD POOL...OVER JACK/WISE AND WILBARGER/BAYLOR/WICHITA/ARCHER
   COUNTIES OF NWRN/N-CNTRL TX.  LATEST MESOANALYSIS INDICATES THAT MCS
   REMAINS N OF WARM FRONT WHICH EXTENDS FROM N OF ABI-ACT-UTS...WITH
   SYSTEM BEING MAINTAINED BY STRONG INFLOW OF A QUITE MOIST AIR MASS
   /PW VALUES OF 1.5-1.8 INCHES/ BY 40-50 KT LLJ.
   
   EXPECT MCS TO CONTINUE SEWD WITH THE SEVERE WEATHER THREAT GRADUALLY
   DEVELOPING E/SE OF WW AREA BETWEEN 09-10Z.  LOCALLY DAMAGING WIND
   GUSTS WILL REMAIN THE PRIMARY HAZARD WITH THE LEADING CONVECTIVE
   LINE...WITH HAIL AND HIGH WINDS POSSIBLE IN ASSOCIATION WITH
   TRAILING STORMS DEVELOPING OVER SYSTEM COLD POOL.
   
   ..MEAD.. 04/30/2009
   
   
   ATTN...WFO...SHV...FWD...OUN...SJT...
   
   LAT...LON   33039930 33659950 34319949 34499910 34289816 34039702
               33869627 33499558 32859551 32319611 32049699 32199816
               33039930