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WWUS20 KWNS 232041

SEL8

SPC WW 232041

MTZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 398

NWS Storm Prediction Center Norman OK

245 PM MDT Thu Jul 23 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southwest and Central Montana



* Effective this Thursday afternoon and evening from 245 PM until

  900 PM MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorms have developed over the mountains of

southwest Montana.  These storms will spread northeastward this

afternoon across the watch area, posing a risk of damaging winds and

hail.



The severe thunderstorm watch area is approximately along and 65

statute miles east and west of a line from 50 miles northeast of

Great Falls MT to 50 miles east southeast of Dillon MT. 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...CONTINUE...WW 395...WW 396...WW 397...



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

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

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

25030.



...Hart

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