MESOSCALE DISCUSSION 1186
   NWS STORM PREDICTION CENTER NORMAN OK
   0804 PM CDT WED JUN 17 2009
   
   AREAS AFFECTED...PARTS OF NRN KS/S CENTRAL AND SERN NEB/PARTS OF
   SWRN IA
   
   CONCERNING...TORNADO WATCH 440...
   
   VALID 180104Z - 180200Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 440 CONTINUES.
   
   ISOLATED SEVERE/TORNADO THREAT CONTINUES ACROSS PARTS OF WW 440. 
   WITH THIS WATCH SCHEDULED TO EXPIRE AT 18/02Z...NEW WW WILL LIKELY
   BE REQUIRED.
   
   LATEST RADAR LOOP SHOWS ISOLATED SEVERE STORMS CONTINUING ACROSS NRN
   PORTIONS OF WW 440 -- I.E. ACROSS CENTRAL AND INTO E CENTRAL NEB
   ATTM.  THE CONVECTION IS ONGOING WITHIN A VERY UNSTABLE AIRMASS IN
   PLACE ACROSS THIS REGION...N OF A SURFACE WARM FRONT WITHIN ESELY
   LOW-LEVEL FLOW REGIME.  
   
   LATEST FBY /FAIRBURY NEB/ PROFILER SHOWS FLOW VEERING/INCREASING
   WITH HEIGHT TO 50 KT WLYS AT MID LEVELS...YIELDING DEEP-LAYER SHEAR
   FAVORABLE FOR SUPERCELLS....AS WELL AS 20 KT 0-1 KM SHEAR --
   SUPPORTIVE OF LOW-LEVEL ROTATION.  GIVEN THE KINEMATIC AND
   THERMODYNAMIC ENVIRONMENT...THREATS FOR VERY LARGE HAIL...DAMAGING
   WINDS...AND ISOLATED TORNADOES WILL LIKELY CONTINUE FOR THE NEXT
   SEVERAL HOURS.  THIS WILL LIKELY NECESSITATE REPLACEMENT OF WW 440.
   
   ..GOSS.. 06/18/2009
   
   
   ATTN...WFO...DMX...EAX...OAX...TOP...GID...LBF...GLD...
   
   LAT...LON   41729422 41089402 40749426 40439658 39569860 39649984
               41379985 41729643 41729422