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WWUS20 KWNS 262333

SEL2

SPC WW 262333

MTZ000-NDZ000-270700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 122

NWS Storm Prediction Center Norman OK

535 PM MDT Sat May 26 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Montana

  Western North Dakota



* Effective this Saturday afternoon and Sunday morning from 535

  PM until 100 AM MDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible



SUMMARY...Isolated to scattered storms should initially develop

across parts of northeast Montana with a risk for severe hail and

locally strong gusts. This activity will likely develop into a

forward-moving cluster with embedded linear, bowing segments

potentially producing severe wind gusts later this evening across

parts of eastern Montana into western North Dakota.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 30 miles south

southwest of Glasgow MT to 30 miles east of Dickinson ND. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU2).



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.



&&



AVIATION...A few severe thunderstorms with hail surface and aloft to

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

28035.



...Grams

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