MESOSCALE DISCUSSION 0342
   NWS STORM PREDICTION CENTER NORMAN OK
   1142 PM CDT MON MAR 30 2009
   
   AREAS AFFECTED...SERN OK...SWRN AR AND NCNTRL/NERN TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 95...96...
   
   VALID 310442Z - 310645Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   95...96...CONTINUES.
   
   SRN FRINGE OF THE UPR LVL TROUGH WAS SKIRTING ACROSS OK/NRN TX THIS
   EVENING WITH THE ASSOCD CDFNT BEGINNING TO ACCELERATE INTO NCNTRL
   TX...CATCHING UP TO THE PRE-FRONTAL TROUGH/DRYLINE.  MOST UNSTABLE
   AIR MASS...LOCATED OVER CNTRL/NCNTRL TX WAS BECOMING INCREASINGLY
   NARROW...BEING PINCHED FROM THE EAST BY POOR LAPSE RATES AND MEAGER
   TROPOSPHERIC MOISTURE.  SOME RECOVERY IS EXPECTED TO TAKE PLACE OVER
   THE NEXT FEW HOURS GENERALLY WEST OF THE SABINE RVR NWD TOWARD THE
   ARKLATEX WITH MUCAPE OF 500-1000 J/KG.  
   
   LINEAR MCS OVER SERN OK HAS WEAKENED SOMEWHAT SINCE 03Z AS IT
   BECOMES MORE REMOVED FROM THE INSTABILITY AXIS.  ISOLD LARGE
   HAIL/GUSTY WINDS MAY ACCOMPANY THE LINE...ESPECIALLY OVER EXTREME
   SERN OK/SWRN AR FOR A COUPLE MORE HOURS.  COORDINATION WITH WFO
   TSA/SHV/LZK REVEALED THAT THE SVR THREAT WILL LIKELY BE SUFFICIENTLY
   ISOLD TO NOT REQUIRE AN ADDITIONAL WW DOWNSTREAM.
   
   MEANWHILE...EARLIER SUPERCELL STORMS THAT DEVELOPED INVOF THE
   DRYLINE APPEAR TO HAVE PEAKED IN INTENSITY DIRECTLY OVER THE DFW
   METROPLEX WITH VERY LARGE HAIL.  STORMS HAVE EVOLVED INTO SMALL BOWS
   AND WILL CONTINUE DOWNSTREAM WITHIN THE NRN EDGE OF STRONGER
   INSTABILITY/WEAKER CAP TOWARD NERN TX THROUGH EARLY MORNING TUESDAY.
    THEY MAY PRODUCE LARGE HAIL/GUSTY WINDS FOR A FEW MORE HOURS. 
   BUT...THEY SHOULD BEGIN TO WEAKEN AS THE PRIMARY SLY LLJ BEGINS TO
   MOVE NEWD INTO THE OZARKS.
   
   ..RACY.. 03/31/2009
   
   
   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...
   
   LAT...LON   32269764 33049710 33959634 35009550 35549486 34719417
               33419370 33219371 32129434 32119594 32269764