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688 

WWUS20 KWNS 112304

SEL3

SPC WW 112304

MTZ000-120700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 573

NWS Storm Prediction Center Norman OK

505 PM MDT Sun Aug 11 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeast Montana



* Effective this Sunday afternoon and Monday morning from 505 PM

  until 100 AM MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Clusters of thunderstorms over central Montana will track

east-northeastward across the watch area this evening.  A few

supercells and bow echoes capable of damaging winds and large hail

are possible.



The severe thunderstorm watch area is approximately along and 80

statute miles north and south of a line from 85 miles west southwest

of Glasgow MT to 10 miles north northeast of Sidney MT. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU3).



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 569...WW 570...WW

571...WW 572...



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 500. Mean storm motion vector

26030.



...Hart

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