MESOSCALE DISCUSSION 0832
   NWS STORM PREDICTION CENTER NORMAN OK
   0906 PM CDT FRI MAY 20 2011
   
   AREAS AFFECTED...NERN TX/SWRN AR/NWRN LA
   
   CONCERNING...TORNADO WATCH 315...
   
   VALID 210206Z - 210400Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 315 CONTINUES.
   
   SEVERE THREAT CONTINUES TO DIMINISH SLOWLY WITH TIME.
   
   LATEST RADAR LOOP SHOWS AN EXPANSIVE AREA OF THUNDERSTORMS EXTENDING
   FROM SRN MO SSWWD INTO THE HILL COUNTRY OF TX.  MODERATELY UNSTABLE
   AIRMASS PREVAILS AHEAD OF THE ONGOING CONVECTION FROM SRN AR
   SWWD...WHERE LOW TO MID 70S DEWPOINTS ARE INDICATED.
   
   STORMS ARE EVOLVING WITH TIME TOWARD A PRIMARILY LINEAR BAND...AND
   AS SUCH TORNADO THREAT HAS DECREASED.  SOME POTENTIAL FOR DAMAGING
   WINDS REMAINS...BUT EXPECT THE MAIN THREAT FROM HERE FORWARD TO BE
   IN THE FORM OF HAIL.  ALONG WITH SEVERE POTENTIAL...HEAVY RAINFALL
   IS ALSO POSSIBLE -- PARTICULARLY ACROSS PORTIONS OF NERN TX WHERE
   STORMS ARE MOVING FAIRLY SLOWLY AND MANY AREAS EXPERIENCE
   REPEATED/PROLONGED STORMS.
   
   ..GOSS.. 05/21/2011
   
   
   ATTN...WFO...LZK...SHV...FWD...
   
   LAT...LON   31709491 31899578 33109521 34619343 34589214 31929344
               31709491