Mesoscale Discussion 1286
   NWS Storm Prediction Center Norman OK
   1025 PM CDT Sun Jul 19 2020

   Areas affected...Eastern Wyoming...West-central Nebraska...Northwest
   Kansas

   Concerning...Severe Thunderstorm Watch 387...

   Valid 200325Z - 200430Z

   The severe weather threat for Severe Thunderstorm Watch 387
   continues.

   SUMMARY...A severe threat is likely to continue for a couple more
   hours across parts of the central High Plains. The threat is
   expected to move eastward into parts of northern and central
   Nebraska around midnight. Either a new watch or an extension could
   be needed if the severe threat can be maintained.

   DISCUSSION...The latest mosaic radar imagery shows scattered strong
   to severe convection from far eastern Wyoming into northwestern
   Nebraska. The strongest cell is in Goshen County, Wyoming and
   recently produced 2 inch diameter hail. According to the RAP, the
   storms are located along a corridor of moderate instability where
   MLCAPE is estimated to be near 1500 J/Kg. The Thedford, Nebraska
   WSR-88D VWP still shows 0-6 km shear near 35 kt with substantial
   directional shear in the lowest 3 Km above ground level. This
   combined with the instability will continue to support severe storm
   development late this evening. Isolated large hail and wind damage
   will be the primary threats. The storms are expected to move
   eastward into north and central Nebraska around midnight. A decision
   to extend the current watch or issue a new watch would be needed as
   the storms approach the edge of WW 387.

   ..Broyles.. 07/20/2020

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

   ATTN...WFO...GID...LBF...UNR...GLD...CYS...

   LAT...LON   43010331 42950403 42820436 42500444 42120426 41610331
               41060195 39920185 39770086 40209942 41209931 42539945
               42780083 43010331