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URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 251

NWS Storm Prediction Center Norman OK

225 PM MDT Thu Jun 10 2021



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Northeast Montana

  Western North Dakota



* Effective this Thursday afternoon and evening from 225 PM until

  900 PM MDT.



* Primary threats include...

  A few tornadoes and a couple intense tornadoes possible

  Widespread large hail and scattered very large hail events to 4

    inches in diameter likely

  Scattered damaging wind gusts to 70 mph likely



SUMMARY...Intense thunderstorms including supercells will likely

rapid develop through mid/late afternoon from east-central/northeast

Montana into western South Dakota. Of greatest concern as far as

intense supercells and a tornado risk will be those storms occurring

near a west-east warm front across the region, where low-level

moisture/shear will be maximized. A strong tornado is possible.



The tornado watch area is approximately along and 80 statute miles

north and south of a line from 10 miles north northwest of Wolf

Point MT to 70 miles east southeast of Williston ND. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU1).



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 4 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 22020.



...Guyer

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