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Mesoscale Discussion 820
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   MESOSCALE DISCUSSION 0820
   NWS STORM PREDICTION CENTER NORMAN OK
   0817 PM CDT THU MAY 19 2011
   
   AREAS AFFECTED...CENTRAL THIRD OF KS
   
   CONCERNING...TORNADO WATCH 309...
   
   VALID 200117Z - 200315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 309 CONTINUES.
   
   THREAT FOR HAIL -- ALONG WITH ISOLATED WIND DAMAGE AND PERHAPS A
   BRIEF TORNADO -- CONTINUES.
   
   LATEST RADAR LOOP SHOWS A STEADY TO PERHAPS SLOW DECREASING TREND IN
   STORM COVERAGE...THOUGH A SMALL STORM CLUSTER CONTINUES W OF TOP --
   INCLUDING A SUPERCELL OVER WRN OTTAWA CO.  OTHER CELLS ARE TRYING TO
   DEVELOP OVER OSBORNE CO...AND A THIRD AREA OF CONVECTION CONTINUES
   TO EVOLVE BOTH N AND S OF DDC JUST E OF A COMBINED RETREATING
   DRYLINE/CONVECTIVE OUTFLOW BOUNDARY.  
   
   WITH SHEAR SUPPORTIVE OF SUPERCELLS...SEVERE THREAT PERSISTS --
   ESPECIALLY WITH ROTATING CELLS.  OTTAWA CO. SUPERCELL AND THE
   DEVELOPING OSBORNE CO CELLS APPEAR TO BE SLIGHTLY ELEVATED JUST N OF
   THE WARM FRONT HOWEVER...AND THE DODGE CITY-AREA STORMS APPEAR
   SLIGHTLY ELEVATED ATOP CONVECTIVELY COOLED AIR.  THEREFORE...HAIL
   APPEARS TO BE THE MAIN SEVERE THREAT ATTM...WITH LESSER HAIL/BRIEF
   TORNADO POTENTIAL.
   
   WITH THREAT LIKELY TO LINGER FOR AT LEAST THE NEXT COUPLE OF
   HOURS...A NEW WW MAY BE REQUIRED ACROSS PARTS OF CENTRAL KS.
   
   ..GOSS.. 05/20/2011
   
   
   ATTN...WFO...TOP...ICT...OUN...GID...DDC...GLD...
   
   LAT...LON   36979934 36979987 37940018 39739956 39899738 39759717
               38019710 37109798 36979934 
   
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