MESOSCALE DISCUSSION 1881
   NWS STORM PREDICTION CENTER NORMAN OK
   0131 PM CDT FRI AUG 24 2007
   
   AREAS AFFECTED...NERN OK...SWRN MO...FAR NWRN AR...EXTREME SERN KS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 241831Z - 242000Z
   
   TSTM COVERAGE IS EXPECTED TO INCREASE ALONG A RESIDUAL OUTFLOW
   BOUNDARY THIS AFTERNOON TO THE SW OF WW 647. THE COMBINATION OF
   MODERATE TO STRONG INSTABILITY TO THE S OF THIS BOUNDARY AND
   DEEP-LAYER SHEAR AROUND 35 KTS...WILL SUPPORT A THREAT FOR
   MULTICELLULAR CLUSTERS AND POSSIBLY EMBEDDED SUPERCELL STRUCTURES
   WITH DAMAGING WINDS AND LARGE HAIL AS THE MAIN THREATS. THE AREA
   WILL BE MONITORED FOR A POSSIBLE WW.
   
   RECENT VISIBLE SATELLITE AND RADAR IMAGERY DEPICT GROWING CBS/TSTMS
   ALONG A SW TO NE ORIENTED OUTFLOW BOUNDARY ROUGHLY STRETCHING FROM
   NEAR TUL TO GMU TO SGF. THIS CORRIDOR SHOULD PROVE FAVORABLE FOR
   CONTINUED CONVECTIVE DEVELOPMENT THIS AFTERNOON...AS WEAK CAPPING
   INVERSION HAS BEEN ERODED PER 18Z SGF RAOB. LATEST RUC OBJECTIVE
   ANALYSIS INDICATES MLCAPES OF 2000 TO 3000 J/KG ALREADY FROM CNTRL
   TO NERN OK TO THE S/SW OF THE OUTFLOW BOUNDARY. THIS HAS BECOME
   JUXTAPOSED WITH 0-6 KM SHEAR OF 30 TO 40 KTS PER REGIONAL WIND
   PROFILERS...WHICH WILL BE SUFFICIENT FOR STORM ORGANIZATION AS
   CONVECTION GROWS UPSCALE.
   
   ..GRAMS.. 08/24/2007
   
   
   ATTN...WFO...SGF...TSA...ICT...
   
   37819353 37529320 37089295 36609340 36149412 35769473
   35679526 35919583 36269586 36559581 37019520 37499455