MESOSCALE DISCUSSION 1258
   NWS STORM PREDICTION CENTER NORMAN OK
   1256 AM CDT SUN JUN 21 2009
   
   AREAS AFFECTED...NORTHEAST KS/SOUTHEAST NEB/NORTHWEST MO/SOUTHWEST
   IA
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 210556Z - 210730Z
   
   REMAINING PORTION OF TORNADO WATCH 487 WILL BE ALLOWED TO
   EXPIRE...BUT A LIMITED/BRIEF TORNADO THREAT MAY CONTINUE OVERNIGHT
   ACROSS NORTHEAST KS INTO ADJACENT PORTIONS OF SOUTHEAST
   NEB/NORTHWEST MO/SOUTHWEST IA. AN ADDITIONAL WATCH IS NOT CURRENTLY
   ANTICIPATED.
   
   A FEW STORMS HAVE EXHIBITED MODEST LOW LEVEL ROTATION ACROSS
   NORTHEAST KS OVER THE PAST HOUR...NAMELY IN POTTAWATOMIE COUNTY AS
   OF 0545Z. AS A WARM FRONT CONTINUES TO GRADUALLY LIFT
   NORTHWARD...AND A SOUTH-SOUTHWESTERLY LOW LEVEL JET FURTHER
   INCREASES /ALREADY 40 KT PER REGIONAL WSR-88D VWPS/...STORMS MAY
   CONTINUE TO EXHIBIT AT LEAST TRANSIENT BOUTS OF LOW LEVEL ROTATION
   OVERNIGHT INTO PORTIONS OF SOUTHEAST NEB/SOUTHWEST IA/NORTHWEST MO.
   EVEN WITH A VERY MOIST AIRMASS /70-72 F SURFACE DEWPOINTS/ AND 0-1
   KM SRH IN EXCESS OF 300 MS/S2 PER TOPEKA WSR-88D VWP...NEAR SURFACE
   CINH SHOULD LIMIT THE OVERALL TORNADO POTENTIAL OVERNIGHT...BUT A
   BRIEF TORNADO CANNOT BE RULED OUT NONETHELESS.
   
   ..GUYER.. 06/21/2009
   
   
   ATTN...WFO...DMX...EAX...OAX...TOP...
   
   LAT...LON   39229593 40099723 41109709 41379469 39579442 39229593