MESOSCALE DISCUSSION 1098
   NWS STORM PREDICTION CENTER NORMAN OK
   0507 PM CDT SAT JUN 13 2009
   
   AREAS AFFECTED...CNTRL/SRN AR INTO CNTRL MS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 132207Z - 132300Z
   
   DIURNALLY-DRIVEN TSTMS DEVELOPING ALONG A REMNANT FRONTAL BOUNDARY
   WILL POSE A THREAT FOR LARGE HAIL...DAMAGING WINDS AND PERHAPS A
   BRIEF TORNADO. GIVEN VERY LARGE INSTABILITY JUXTAPOSED WITH
   SUFFICIENT DEEP-LAYER SHEAR...A WW MAY BECOME NECESSARY.
   
   ISOLATED TSTMS HAVE RECENTLY DEVELOPED ALONG A STALLED FRONTAL
   BOUNDARY THAT STRETCHED FROM AROUND 20 N HOT TO 40 W CBM AS OF 22Z.
   VERY STRONG INSTABILITY PERSISTS S OF THIS BOUNDARY WITH MLCAPE AOA
   3000 J/KG. ALTHOUGH DEQUEEN AR PROFILER AND AREA VWP DATA DEPICT
   MEAGER LOW-LEVEL FLOW...30-35 KT WLYS AROUND 6 KM WILL BE SUFFICIENT
   FOR UPDRAFT ROTATION AND SUPERCELL DEVELOPMENT. UPPER-LEVEL FORCING
   APPEARS NEGLIGIBLE WHICH SHOULD KEEP OVERALL CONVECTIVE COVERAGE
   ISOLATED...BUT AID IN MAINTAINING DISCRETE STRUCTURES. LARGE HAIL
   APPEARS TO BE THE PRIMARY THREAT...BUT DAMAGING WINDS AND PERHAPS A
   BRIEF TORNADO COULD OCCUR GIVEN SOME DEGREE OF ENHANCED
   VORTICITY/STRETCHING ALONG THE BOUNDARY.
   
   ..GRAMS.. 06/13/2009
   
   
   ATTN...WFO...MEG...JAN...LZK...SHV...TSA...
   
   LAT...LON   33948915 33348908 32928941 32939043 33299185 33839314
               34219444 34539473 34849465 35099407 34739208 33948915