MESOSCALE DISCUSSION 1001

        MESOSCALE DISCUSSION 1001     NWS STORM PREDICTION CENTER NORMAN OK     0621 PM CDT THU MAY 31 2012          AREAS AFFECTED...SWRN TX          CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY           VALID 312321Z - 010145Z          PROBABILITY OF WATCH ISSUANCE...20 PERCENT          SUMMARY...ISOLATED HAIL STORMS ARE LIKELY FOR A FEW HOURS.          DISCUSSION...STORMS HAVE FORMED OVER SWRN TX ALONG A WWD RETREATING     BOUNDARY WITH RISING DEWPOINTS INTO A STEEP LAPSE RATE ENVIRONMENT     AND WITH AREAS OF UPSLOPE. THE ELY SURFACE FLOW IS AUGMENTING     EFFECTIVE HODOGRAPH LENGTH DESPITE WEAK WLY FLOW ALOFT.     THERMODYNAMICS ARE FAVORABLE FOR SEVERE HAIL. THE THREAT SHOULD WANE     AFTER SUNSET.          ..JEWELL/CORFIDI.. 05/31/2012