MESOSCALE DISCUSSION 0668
   NWS STORM PREDICTION CENTER NORMAN OK
   0933 PM CDT SAT MAY 22 2010
   
   AREAS AFFECTED...PARTS OF CENTRAL AND ERN SD/SERN ND
   
   CONCERNING...TORNADO WATCH 202...
   
   VALID 230233Z - 230400Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 202 CONTINUES.
   
   SEVERE/ISOLATED TORNADO THREAT CONTINUES ACROSS MUCH OF WW 202.
   
   RADAR IMAGERY SHOWS A CONTINUED INCREASE IN THUNDERSTORMS ACROSS WW
   202...AS SLY LOW-LEVEL JET CONTINUES TO INTENSIFY ACROSS THE PLAINS.
    WHILE SUPERCELLULAR REFLECTIVITY STRUCTURE CONTINUES WITH A COUPLE
   OF CELLS...TORNADO THREAT APPEARS TO HAVE DIMINISHED SOMEWHAT OVER
   THE PAST COUPLE OF HOURS.
   
   NONETHELESS...THREAT FOR AN ISOLATED TORNADO OR TWO PERSISTS...WHILE
   POTENTIAL FOR LARGE HAIL AND/OR LOCALLY-DAMAGING WINDS SHOULD LAST
   FOR SEVERAL HOURS AS STORMS CONTINUE SPREADING NNEWD WITH TIME
   ACROSS THE ERN HALF OF SD.
   
   ..GOSS.. 05/23/2010
   
   
   ATTN...WFO...FGF...FSD...ABR...BIS...
   
   LAT...LON   47409836 46819761 46299730 44149795 43679947 44010012
               47099922 47409836