MESOSCALE DISCUSSION 1189
   NWS STORM PREDICTION CENTER NORMAN OK
   0811 PM CDT SAT JUN 11 2011
   
   AREAS AFFECTED...SERN MT...NERN WY...WRN SD
   
   CONCERNING...TORNADO WATCH 465...
   
   VALID 120111Z - 120215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 465 CONTINUES.
   
   TORNADO THREAT CONTINUES ACROSS WW 465...ESPECIALLY FROM SRN CARTER
   COUNTY MT...SEWD TOWARD THE NRN BLACK HILLS OF SD.  LATEST RADAR
   DATA DEPICTS A WELL ORGANIZED CLUSTER OF STORMS OVER SERN MT MOVING
   ESEWD INTO A REGION OF FAVORABLE SHEAR/INSTABILITY FOR STORM
   ROTATION AND POSSIBLE TORNADOES.  00Z SOUNDING DOWNSTREAM FROM RAP
   DEPICTS THIS ENVIRONMENT WELL WITH MORE THAN ADEQUATE SHEAR PROFILES
   FOR SUPERCELLS AND A FAVORABLY MOIST BOUNDARY LAYER.  AS LLJ
   INCREASES ACROSS WRN SD THIS COMPLEX OF STORMS MAY GRADUALLY
   INCREASE/EXPAND IN AREAL COVERAGE.
   
   ..DARROW.. 06/12/2011
   
   
   ATTN...WFO...ABR...BIS...LBF...UNR...CYS...BYZ...
   
   LAT...LON   46460642 46460221 42880107 42870502 46460642