MESOSCALE DISCUSSION 0840
   NWS STORM PREDICTION CENTER NORMAN OK
   0711 PM CDT FRI MAY 15 2009
   
   AREAS AFFECTED...MOST OF OK...PORTIONS OF NWRN TX...SERN KS
   
   CONCERNING...TORNADO WATCH 307...
   
   VALID 160011Z - 160115Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 307 CONTINUES.
   
   A DOWNSTREAM SEVERE THUNDERSTORM WATCH WILL LIKELY BE ISSUED BY 01Z
   FOR MOST OF OK AND PORTIONS OF NWRN TX.
   
   AS OF 0000Z...RADAR IMAGERY DEPICTED AN ELONGATED QLCS FROM ANDERSON
   COUNTY KS SWWD TO MAJOR COUNTY OK. ADDITIONAL CELLS HAVE DEVELOPED
   BETWEEN THE QLCS AND A PREVIOUSLY LONG-LIVED SUPERCELL THAT HAD
   RECENTLY WEAKENED OVER WHEELER COUNTY TX. TEMPERATURE PERTURBATIONS
   IN COLD POOLS HAVE BEEN AROUND 20 DEG F /FALLING FROM THE MIDDLE 80S
   TO MIDDLE 60S AS THE QLCS HAS PASSED/. ALTHOUGH MID-LEVEL WLYS ARE
   MODEST /20-25 KT AT 6 KM AGL IN AREA PROFILERS/...STRENGTH OF COLD
   POOLS AND MID-UPPER 60S SURFACE DEW POINTS ACROSS MUCH OF OK AHEAD
   OF THIS LINE CONTRIBUTING TO MLCAPES AOA 2500 J/KG...SHOULD RESULT
   IN AN ORGANIZED MCS EVOLVING EWD ACROSS SERN KS TO THE RED RIVER IN
   SWRN OK/NWRN TX. DAMAGING WINDS ARE LIKELY TO BECOME THE PREDOMINANT
   THREAT WITH EMBEDDED SEVERE HAIL CORES AND PERHAPS A BRIEF TORNADO.
   
   ..GRAMS.. 05/16/2009
   
   
   ATTN...WFO...TSA...TOP...ICT...OUN...LUB...AMA...
   
   LAT...LON   33809853 33799960 34190041 34740079 35460022 36519866
               37779689 38199589 38049528 37509525 36879518 36879472
               35869526 33809853