MESOSCALE DISCUSSION 0603
   NWS STORM PREDICTION CENTER NORMAN OK
   0219 PM CDT WED MAY 08 2013
   
   AREAS AFFECTED...WRN OK...NWRN TX...SWRN KS
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 081919Z - 082015Z
   
   PROBABILITY OF WATCH ISSUANCE...80 PERCENT
   
   SUMMARY...SCATTERED SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP
   ACROSS MUCH OF WRN OK OVER THE NEXT 3-4 HOURS.  LARGE HAIL AND
   DAMAGING WINDS ARE PRIMARY SEVERE THREATS.
   
   DISCUSSION...BOUNDARY LAYER MOISTURE IS QUICKLY ADVANCING NWD ACROSS
   THE SRN PLAINS WITH THE LEADING EDGE OF HIGHER QUALITY DEW
   POINTS...CHARACTERIZED BY 60F...NOW NORTH OF I-40 OVER OK.  VIS
   SATELLITE IMAGERY SUPPORTS THIS WITH CONSIDERABLE AMOUNT OF BOUNDARY
   LAYER CU DEEPENING ACROSS SWRN OK WITHIN CONFLUENT MOISTENING FLOW. 
   DESPITE VEILED HIGH CLOUDS THAT ARE SPREADING ACROSS THIS
   REGION...LOW LEVEL LAPSE RATES HAVE STEEPENING SUFFICIENTLY FOR
   ISOLATED TSTM DEVELOPMENT OVER ELLIS COUNTY IN NW OK.  FURTHER
   WEAKENING OF CAP AND GRADUAL MOISTENING/DESTABILIZING WARM SECTOR
   SHOULD CONTRIBUTE TO AN ENVIRONMENT FAVORABLE FOR ADDITIONAL TSTM
   DEVELOPMENT INTO THE EVENING HOURS.  LARGE HAIL AND DAMAGING WINDS
   MAY ACCOMPANY ANY SUPERCELLS THAT EVOLVE OFF THE DRYLINE...OR ALONG
   WEAK NW-SE ORIENTED CONFLUENCE ZONE THAT CURRENTLY EXTENDS FROM SFC
   LOW OVER THE OK PANHANDLE...SEWD INTO NRN GRADY COUNTY.
   
   ..DARROW/CORFIDI.. 05/08/2013
   
   
   ATTN...WFO...ICT...OUN...DDC...LUB...AMA...
   
   LAT...LON   36580015 37289949 37109808 35079777 33899858 33739990
               34790028 36580015