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Severe Thunderstorm Watch 357
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WW0357 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL7

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 357
   NWS Storm Prediction Center Norman OK
   535 PM MDT Fri Jul 9 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Southwest South Dakota
     Northeast Wyoming

   * Effective this Friday afternoon and evening from 535 PM until
     1100 PM MDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Scattered large hail events to 1.5 inches in diameter possible

   SUMMARY...A small cluster with embedded supercells is expected to
   move east-southeastward across northeast Wyoming and southwest South
   Dakota this evening through early tonight.  The strongest storms
   will be capable of producing occasional large hail and damaging
   outflow gusts.

   The severe thunderstorm watch area is approximately along and 40
   statute miles north and south of a line from 25 miles west northwest
   of Gillette WY to 40 miles south southeast of Rapid City SD. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU7).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 356...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 450. Mean storm motion vector
   30035.

   ...Thompson
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Page last modified: July 10, 2021
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