MESOSCALE DISCUSSION 1089
   NWS STORM PREDICTION CENTER NORMAN OK
   0752 PM CDT SUN JUN 10 2007
   
   AREAS AFFECTED...CNTRL/ERN OK AND WRN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 376...
   
   VALID 110052Z - 110145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 376
   CONTINUES.
   
   A COMPOSITE OUTFLOW BOUNDARY EMANATING FROM TSTMS OVER SWRN MO AND
   SERN KS APPEARS TO BE MOVING SWD INTO EXTREME NERN OK FROM NEAR
   KPNC...PAWHUSKA TO MIDWAY BETWEEN VINITA AND MIAMI.  NEW UPDRAFTS
   CONTINUE TO DEVELOP ALONG/N OF THIS BOUNDARY AS LOW-LEVEL
   CONVERGENCE IS MAXIMIZED. MEANWHILE...COLD OUTFLOW WAS ALSO SURGING
   WWD FROM AR INTO ECNTRL OK...WITH ADDITIONAL COLD POOLS BEGINNING TO
   GATHER STRENGTH ACROSS CNTRL OK ASSOCD WITH TSTMS MOVING EWD FROM
   THE OKC METRO AREA. THE REGION ALONG THE I-44 CORRIDOR NWD TO THE
   KS/OK BORDER OUTFLOW REMAINS POTENTIALLY UNSTABLE WITH MLCAPES OF
   2000-2500 J/KG.  AS OUTFLOW BOUNDARIES CONTINUE TO COLLIDE VCNTY
   NERN OK...MORE TSTMS WILL LIKELY DEVELOP WITH POTENTIAL FOR DMGG
   WIND GUSTS AND HAIL.  ISOLD TORNADOES WILL REMAIN
   POSSIBLE...GENERALLY ASSOCIATED WITH THE E-W ORIENTED OUTFLOW
   BOUNDARY MOVING SWD THROUGH NERN OK FOR A COUPLE MORE HOURS.
   
   WS 376 HAS AN EXPIRATION OF 0200Z.  IF TSTMS REMAIN STRONG/
   ORGANIZED OVER NERN OK...EITHER A LOCAL EXTENSION OF THE WATCH MAY
   BE NEEDED BY LOCAL WFO/S...OR A NEW SMALL WW MAY BE REQUIRED.
   
   ..RACY.. 06/11/2007
   
   
   ATTN...WFO...LZK...TSA...OUN...
   
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