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Mesoscale Discussion 1064
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   Mesoscale Discussion 1064
   NWS Storm Prediction Center Norman OK
   0927 PM CDT Fri Jun 16 2017

   Areas affected...Portions of the mid Missouri Valley

   Concerning...Severe Thunderstorm Watch 339...341...

   Valid 170227Z - 170430Z

   The severe weather threat for Severe Thunderstorm Watch 339, 341

   SUMMARY...A line of significant severe thunderstorms will continue
   accelerating south/southeast this evening, maintaining the potential
   for a swath of damaging winds (some gusts over 80 mph), large hail,
   and perhaps a tornado or two. This line will likely reach the Kansas
   City metro after 11pm CDT.

   DISCUSSION...A mature complex of powerful thunderstorms is racing
   southeast this evening, into an axis of strong instability
   characterized by MLCAPE values upwards of 4500 J/kg. Indeed, the 00Z
   TOP sounding sampled an excessively wide mid-level buoyancy profile
   amidst a favorable deep-layer wind profile veering with height. Rich
   boundary-layer moisture will temper nocturnal cooling such that this
   high buoyancy (with little inhibition) will be maintained for the
   next few hours. As such, these significant severe storms are
   expected to maintain their intensity as they continue pushing
   southeast. Furthermore, a strengthening low-level jet will likely
   enhance both downwind and upwind propagation this evening,
   maintaining the threat of powerful damaging wind gusts. Upstream
   observations confirm this severe potential, with Lincoln, NE
   reporting a 76kt (87mph) gust at 0137Z (837pm CDT).  Significant
   severe wind gusts (upwards of 80mph), large hail, and a tornado or
   two will remain possible with this line as it advances towards the
   Kansas City metro area over the next two hours.

   ..Picca.. 06/17/2017

   ...Please see for graphic product...


   LAT...LON   40559813 41369619 41249448 39899364 38629332 38349351
               38269486 38619625 39539739 40099815 40559813 

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