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Mesoscale Discussion 888
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   Mesoscale Discussion 0888
   NWS Storm Prediction Center Norman OK
   1043 PM CDT Sat May 27 2017

   Areas affected...northwest OK

   Concerning...Severe Thunderstorm Watch 286...

   Valid 280343Z - 280415Z

   The severe weather threat for Severe Thunderstorm Watch 286
   continues.

   SUMMARY...Long-lived intense thunderstorm will probably continue to
   yield a severe wind-driven hail risk over the next 2 hours.

   DISCUSSION...Radar data (CAPPI 9-km and MRMS MESH) has shown a
   long-lived thunderstorm producing a swath of large hail across the
   OK Panhandle into northwest OK during the past couple of hours.  OK
   mesonet sites (Goodwell, Beaver, Hooker, Slapout) have observed
   measured severe gusts ranging from 60-70 mph with gusts persisting
   for 10 minutes or longer.  This storm has a history of large to very
   large hail.  Given the background mesoscale environment (moderate
   buoyancy and strong effective shear) coupled with favorable synoptic
   forcing for ascent, expecting a long swath of large wind-driven hail
   to occur from Woodward County southeastward into Major, Blaine, and
   Kingfisher counties over the next few hours.  A gradual reduction in
   hail size is expected but the risk for severe gusts will probably
   persist.

   ..Smith.. 05/28/2017

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

   ATTN...WFO...OUN...

   LAT...LON   35909785 36309967 36549961 36349782 35909785 

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Page last modified: May 28, 2017
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