MESOSCALE DISCUSSION 0628
   NWS STORM PREDICTION CENTER NORMAN OK
   0905 PM CDT WED MAY 19 2010
   
   AREAS AFFECTED...CENTRAL AND ERN OK/WRN AR
   
   CONCERNING...TORNADO WATCH 190...191...
   
   VALID 200205Z - 200330Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 190...191...CONTINUES.
   
   LARGE AREA OF THUNDERSTORMS CONTINUES ACROSS THE ERN HALF OF OK AND
   INTO WRN AR...WHERE SEVERE/ISOLATED TORNADO THREAT CONTINUES.  WITH
   WW 190 -- ACROSS OK -- SET TO EXPIRE AT 20/03Z...WATCH REISSUANCE
   WILL BE REQUIRED ACROSS MUCH OF ERN OK.
   
   NUMEROUS THUNDERSTORMS -- INCLUDING A FEW ISOLATED SUPERCELLS --
   CONTINUE MOVING ACROSS OK...WITH ONE OF THE MOST SIGNIFICANT STORMS
   NOW MOVING ACROSS NRN MURRAY/SERN GARVIN COUNTIES ATTM WHERE A
   TORNADO HAS RECENTLY BEEN REPORTED.  ANOTHER INTENSIFYING STORM IS
   CROSSING NERN MUSKOGEE COUNTY AND IS HEADED TOWARD WRN CHEROKEE
   COUNTY -- WHERE A TORNADO MAY OCCUR SHORTLY.
   
   SEVERAL OTHER STORMS PERSIST ACROSS THE AREA...WITH THE OVERALL
   TREND TOWARD A LARGE CLUSTER/MCS WITH TIME AS STORMS MERGE/BECOME
   MORE LINEAR.  
   
   ISOLATED TORNADO THREAT WILL CONTINUE...AT LEAST FOR THE NEXT HOUR
   OR TWO -- PARTICULARLY WITH STORMS WHICH CAN REMAIN MORE ISOLATED. 
   LARGE HAIL WILL ALSO BE POSSIBLE...WHILE WIND THREAT MAY ALSO
   INCREASE WITH TIME AS THE TREND TOWARD MORE LINEAR/MCS EVOLUTION
   CONTINUES.
   
   ..GOSS.. 05/20/2010
   
   
   ATTN...WFO...LZK...SHV...TSA...OUN...
   
   LAT...LON   34299706 35489850 36469904 36339618 35729448 35169340
               33879326 33939533 34299706