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Severe Thunderstorm Watch 478
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WW0478 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 478
   NWS Storm Prediction Center Norman OK
   645 PM CDT Mon Aug 30 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Central and southern North Dakota

   * Effective this Monday night from 645 PM until Midnight CDT.

   * Primary threats include...
     Scattered large hail and isolated very large hail events to 2.5
       inches in diameter possible
     Isolated significant damaging wind gusts to 75 mph possible
     A tornado or two possible

   SUMMARY...Several severe thunderstorms, including a few supercells,
   may persist into the evening for a few hours beyond the scheduled
   expiration of watch 476, which this replaces.

   The severe thunderstorm watch area is approximately along and 60
   statute miles east and west of a line from 70 miles north northeast
   of Dickinson ND to 55 miles south southwest of Bismarck ND. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU8).

   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...This severe thunderstorm watch replaces
   severe thunderstorm watch number 476. Watch number 476 will not
   be in effect after 645 PM CDT. CONTINUE...WW 477...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   33020.

   ...Edwards
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Page last modified: August 31, 2021
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