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Mesoscale Discussion 573
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   MESOSCALE DISCUSSION 0573
   NWS STORM PREDICTION CENTER NORMAN OK
   0830 PM CDT SUN MAY 11 2014

   AREAS AFFECTED...NWRN OK...SWRN INTO CNTRL KS

   CONCERNING...TORNADO WATCH 143...

   VALID 120130Z - 120300Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 143 CONTINUES.

   SUMMARY...TORNADO THREAT CONTINUES WITH DISCRETE SUPERCELLS FROM
   SWRN INTO CNTRL KS...THOUGH A TENDENCY TOWARD A MORE LINEAR MODE MAY
   EVENTUALLY RESULT IN DAMAGING WIND BECOMING THE PRIMARY THREAT.
   DOWNSTREAM WATCH ISSUANCE MAY EVENTUALLY BECOME NECESSARY TO THE
   EAST OF WW 143.

   DISCUSSION...SEVERAL DISCRETE SUPERCELLS ARE ONGOING ACROSS SWRN
   INTO CNTRL KS. A FEW TORNADOES WERE NOTED EARLIER IN SWRN KS...ALONG
   WITH MANY REPORTS OF LARGE HAIL AND SEVERE WIND. WHILE T-TD SPREADS
   HAVE NOT BEEN IDEAL FOR A SUSTAINED TORNADO THREAT...A COOLING AND
   MOISTENING BOUNDARY LAYER COMBINED WITH INCREASING LOW-LEVEL SHEAR
   WILL RESULT IN A WINDOW OF CONTINUED TORNADO THREAT THIS EVENING
   WITH ANY SUSTAINED DISCRETE CELLS. HOWEVER...A SURGING COLD FRONT IS
   RESULTING IN LINEAR UPSCALE GROWTH ON THE WRN EDGE OF THE ONGOING
   CONVECTION. DAMAGING WIND WILL BECOME THE PRIMARY THREAT ALONG THE
   LINE...WITH A SECONDARY THREAT OF LARGE HAIL AND PERHAPS AN ISOLATED
   TORNADO OR TWO. ADDITIONAL STORMS DEVELOPING SOUTH OF WW 143 WILL
   MOVE INTO THE SRN PART OF THE WATCH ACROSS NWRN OK...WHERE THE FRONT
   WILL QUICKLY INTERCEPT THE DRYLINE. 

   STORMS WILL LIKELY APPROACH THE ERN EDGE OF WW 143 BEFORE THE 03Z
   EXPIRATION TIME...SO AN ADDITIONAL WATCH ISSUANCE IS LIKELY IN THE
   NEXT 1-2 HRS.

   ..DEAN.. 05/12/2014


   ATTN...WFO...TOP...ICT...OUN...GID...DDC...AMA...

   LAT...LON   36229998 36620021 37320009 38489951 39099886 39459855
               39769787 39849748 39839721 39689691 39509679 39139661
               38729660 38309674 37899699 37619728 37219773 36559845
               36259933 36229998 

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Page last modified: May 12, 2014
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