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Mesoscale Discussion 1680
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   Mesoscale Discussion 1680
   NWS Storm Prediction Center Norman OK
   1136 PM CDT Wed Sep 01 2021

   Areas affected...portions of northwest Nebraska and southwest South
   Dakota

   Concerning...Severe Thunderstorm Watch 485...

   Valid 020436Z - 020600Z

   The severe weather threat for Severe Thunderstorm Watch 485
   continues.

   SUMMARY...Although an isolated hail and wind threat will persist for
   another hour or so, overall trends suggest the severe potential
   should sufficiently diminish by 01 AM CDT to allow Severe
   Thunderstorm Watch #485 to expire on time.

   DISCUSSION...Showers and thunderstorms continue to develop and move
   slowly east across Severe Thunderstorm Watch #485. A largely
   unstable and sheared airmass remains along and ahead of these
   thunderstorms and thus the potential for isolated hail and wind will
   continue. However, continued storm interactions and upscale growth
   will tend to favor an overall weakening trend with time. Barring
   more robust, discrete initiation ahead of the existing line of
   thunderstorms, all indications are that the watch will be allowed to
   expire at 06Z/01 AM CDT.

   ..Marsh.. 09/02/2021

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

   ATTN...WFO...FSD...ABR...LBF...UNR...CYS...

   LAT...LON   43070302 44680139 44309928 42989960 41210207 41220258
               43070302 

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Page last modified: September 02, 2021
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