MESOSCALE DISCUSSION 1218
   NWS STORM PREDICTION CENTER NORMAN OK
   0649 PM CDT THU JUN 18 2009
   
   AREAS AFFECTED...SD/SERN ND/W CENTRAL MN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 465...
   
   VALID 182349Z - 190115Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 465
   CONTINUES.
   
   STORMS CONTINUE ACROSS SD AND ADJACENT PARTS OF SERN ND AND W
   CENTRAL MN...AND SHOULD SPREAD SLOWLY S OF THE WW WITH TIME.  NEW WW
   POSSIBLE.
   
   STORMS CONTINUE MOVING EWD ACROSS NERN SD/FAR SERN ND AND INTO W
   CENTRAL MN ATTM...WHILE DEVELOPMENT CONTINUES TO SHIFT SWD ACROSS
   CENTRAL SD NEAR OUTFLOW FROM THE AFOREMENTIONED STORMS.  WHILE MOST
   OF THE SEVERE THREAT REMAINS CONTAINED WITHIN WW 465...CONVECTION IS
   DEVELOPING SWD INTO CENTRAL SD -- WHERE AMPLY-UNSTABLE AND
   FAVORABLY-SHEARED ENVIRONMENT EXISTS.  THUS -- NEW WW MAY BE
   REQUIRED S OF WW 465.
   
   ..GOSS.. 06/18/2009
   
   
   ATTN...WFO...DLH...MPX...FGF...FSD...ABR...UNR...
   
   LAT...LON   44580126 45049867 45809732 46419664 46849680 47119418
               46279399 45419527 43719789 43350092 43360205 44580126