MESOSCALE DISCUSSION 1003
   NWS STORM PREDICTION CENTER NORMAN OK
   0936 PM CDT SAT JUN 08 2013

   AREAS AFFECTED...PANHANDLE AND NWRN TX...SWRN OK

   CONCERNING...SEVERE THUNDERSTORM WATCH 288...

   VALID 090236Z - 090400Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 288
   CONTINUES.

   SUMMARY...ISOLATED SEVERE WIND/HAIL THREATS CONTINUE ALONG THE
   TRAILING W/E-ORIENTED PORTION OF THE EXTENSIVE GREAT PLAINS QLCS.
   CONVECTION WILL LIKELY PERSIST BEYOND SCHEDULED 04Z WW
   EXPIRATION...AND A NEW WW OR LOCAL WFO WW EXTENSION MAY BECOME
   NECESSARY.

   DISCUSSION...TRAILING PORTION OF QLCS CONTINUES TO MOVE SWD ALONG
   COMPOSITE OUTFLOW/FRONT...CURRENTLY ACROSS THE I-40 CORRIDOR.
   ALTHOUGH THE LLJ HAS ONLY INCREASED TO 25-30 KT THUS FAR IN AREA VWP
   DATA...A NEAR 180 DEGREE TURNING OF WINDS WITH HEIGHT IS SUPPORTING
   STRONG EFFECTIVE SHEAR AOA 50 KT. WITH THE 60 F ISODROSOTHERM NOW
   REACHING THE BIG COUNTRY...CONTINUED LOW-LEVEL MOISTURE ADVECTION
   MAY BE ABLE TO COMPENSATE FOR NOCTURNAL COOLING. WITH THIS PORTION
   OF THE QLCS POISED TO DEVELOP S/SWWD WITHIN THE INSTABILITY AXIS...A
   STRENGTHENING COLD POOL COULD AID IN MAINTENANCE OF ISOLATED SEVERE
   STORMS INTO THE OVERNIGHT.

   ..GRAMS.. 06/09/2013


   ATTN...WFO...OUN...SJT...LUB...AMA...MAF...

   LAT...LON   35860083 35870001 35749930 35059902 34059895 33159934
               32790012 32770149 33270259 34150300 35510245 35860083