MESOSCALE DISCUSSION 1164
   NWS STORM PREDICTION CENTER NORMAN OK
   0539 PM CDT TUE JUN 16 2009
   
   AREAS AFFECTED...SE SD
   
   CONCERNING...TORNADO WATCH 434...435...
   
   VALID 162239Z - 170015Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 434...435...CONTINUES.
   
   THE NEED FOR ADDITIONAL WWS THIS EVENING IS NOT CURRENTLY
   ANTICIPATED...BUT THE RISK FOR LARGE HAIL AND TORNADOES WILL PERSIST
   IN STORMS ACROSS SOUTHEASTERN SOUTH DAKOTA ANOTHER FEW HOURS.
   
   MODEST VEERING WIND PROFILES WITH HEIGHT IN THE LOWER/MID
   TROPOSPHERE...BENEATH GENERALLY LIGHT WESTERLY MID/UPPER
   FLOW...SHOULD MAINTAIN STRONGEST CONVECTIVE DEVELOPMENT NEAR THE
   IMMEDIATE VICINITY OF THE SURFACE LOW/TROUGH ACROSS EASTERN SOUTH
   DAKOTA.  SEVERE THREAT IS BECOMING CONFINED TO THE MITCHELL
   VICINITY...WHERE POTENTIAL INSTABILITY REMAINS STRONG BENEATH
   RELATIVELY COLD MID-LEVEL TEMPERATURES.  THIS WILL PROBABLY CONTINUE
   AND SHIFT SOUTH/EAST OF MITCHELL THROUGH THE 01-02Z TIME FRAME...BUT
   AS UPPER RIDGING BUILDS NORTHWARD THROUGH THE NORTH CENTRAL
   PLAINS...DEVELOPMENT SOUTHWARD INTO NEBRASKA AND IOWA IS NOT
   ANTICIPATED.
   
   ..KERR.. 06/16/2009
   
   
   ATTN...WFO...FGF...FSD...ABR...BIS...
   
   LAT...LON   46860227 46889891 44669652 44609725 43069692 43049909
               44569947 44619970 46860227