

179 

WWUS20 KWNS 102049

SEL2

SPC WW 102049

MTZ000-110400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 252

NWS Storm Prediction Center Norman OK

250 PM MDT Thu Jun 10 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  East-Central/Northeast Montana



* Effective this Thursday afternoon and evening from 250 PM until

  1000 PM MDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 3

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Scattered severe thunderstorms including some supercells

are expected to develop initially across east-central Montana and

quickly move north-northeastward through evening. Large hail and

severe-caliber wind gusts are the primary hazards, although a

tornado could also occur.



The severe thunderstorm watch area is approximately along and 90

statute miles east and west of a line from 75 miles east northeast

of Havre MT to 55 miles west southwest of Miles City MT. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 251...



AVIATION...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 500. Mean storm motion vector

22035.



...Guyer

