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Tornado Watch 318
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WW0318 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
High 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
   Tornado Watch Number 318
   NWS Storm Prediction Center Norman OK
   355 PM MDT Mon Jun 29 2020

   The NWS Storm Prediction Center has issued a

   * Tornado Watch for portions of 
     Eastern Montana
     Western North Dakota
     Western South Dakota
     Northeast Wyoming

   * Effective this Monday afternoon from 355 PM until Midnight MDT.

   * Primary threats include...
     A couple tornadoes possible
     Scattered large hail likely with isolated very large hail events
       to 3 inches in diameter possible
     Scattered damaging wind gusts to 70 mph possible

   SUMMARY...Supercells are expected to develop especially across
   eastern Montana/western North Dakota through late afternoon/early
   evening, especially in vicinity of a surface low and warm front
   where the large hail and tornado risk should be maximized. Other
   somewhat higher based storms including supercells are expected
   farther south across northeast Wyoming and western South Dakota.

   The tornado watch area is approximately along and 90 statute miles
   east and west of a line from 60 miles north of Williston ND to 50
   miles east southeast of Gillette WY. For a complete depiction of the
   watch see the associated watch outline update (WOUS64 KWNS WOU8).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Tornado Watch means conditions are favorable for
   tornadoes and 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.

   &&

   AVIATION...Tornadoes and a few severe thunderstorms with hail
   surface and aloft to 3 inches. Extreme turbulence and surface wind
   gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
   storm motion vector 21020.

   ...Guyer
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Page last modified: June 30, 2020
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