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WWUS20 KWNS 032328

SEL7

SPC WW 032328

MTZ000-NDZ000-SDZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 327

NWS Storm Prediction Center Norman OK

530 PM MDT Fri Jul 3 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Montana

  Extreme western North Dakota

  Extreme northwestern South Dakota



* Effective this Friday afternoon and Saturday morning from 530

  PM until 100 AM MDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Scattered thunderstorms are forming across southeast

Montana, and additional development is expected through this evening

across eastern Montana.  The storm environment will favor both

supercells and organized clusters capable of producing large hail

and damaging winds.  A cluster or two of storms could move into

northwestern South Dakota and western North Dakota during the early

overnight hours.



The severe thunderstorm watch area is approximately along and 85

statute miles east and west of a line from 55 miles north northeast

of Wolf Point MT to 25 miles southeast of Broadus MT. 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.



&&



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

2 inches. Extreme turbulence and surface wind gusts to 60 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

26020.



...Thompson

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