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Mesoscale Discussion 796
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   Mesoscale Discussion 0796
   NWS Storm Prediction Center Norman OK
   1151 PM CDT Fri May 19 2017

   Areas affected...parts of southern Missouri...portions of northern
   and western Arkansas...and eastern Oklahoma

   Concerning...Tornado Watch 252...

   Valid 200451Z - 200645Z

   The severe weather threat for Tornado Watch 252 continues.

   SUMMARY...Severe potential -- including risk for locally damaging
   winds, hail, and brief tornadoes, will continue over the next few
   hours.

   DISCUSSION...Latest radar loop shows a broken,
   northeast-to-southwest band of locally severe thunderstorms
   extending from southwest Missouri southwest across eastern Oklahoma,
   along western portions of WW 252.  Moderate instability persists
   ahead of the MCS, particularly southwest of the Ozarks, with 1500 to
   2000 J/kg mixed-layer CAPE still in place over southeast Oklahoma
   and into Arkansas.  With a 40 kt southerly low-level jet indicated
   by area VWPs beneath 50 kt mid-level southwesterly flow, shear
   remains supportive of organized/rotating storms.  Greatest tornado
   risk appears to exist across the southeast Oklahoma area, which may
   spread into western Arkansas over the next few hours.  Meanwhile,
   locally damaging winds and marginal hail risk will likely persist
   along the band of convection as storms cross the remainder of WW
   252.

   ..Goss.. 05/20/2017

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...PAH...LSX...LZK...SGF...SHV...TSA...FWD...OUN...

   LAT...LON   33859514 33859645 34359665 35379522 35899451 36409398
               37349342 37699097 37149082 34389345 33859514 

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