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WWUS20 KWNS 020013

SEL6

SPC WW 020013

MTZ000-NDZ000-020600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 476

NWS Storm Prediction Center Norman OK

615 PM MDT Mon Jul 1 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Montana

  Extreme northwestern North Dakota



* Effective this Monday night from 615 PM until Midnight MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...Scattered severe storms in Montana, some with supercell

structure, should persist for a few more hours while continuing to

move generally eastward.  Large hail will be the primary threat with

these more discrete storms.  There is still some potential for

upscale growth with storm mergers across northeastern Montana, which

would result in an increase in the damaging wind threat.



The severe thunderstorm watch area is approximately along and 70

statute miles east and west of a line from 70 miles north northeast

of Wolf Point MT to 20 miles west southwest of Broadus MT. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU6).



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...This severe thunderstorm watch replaces

severe thunderstorm watch number 474. Watch number 474 will not

be in effect after 615 PM MDT. CONTINUE...WW 475...



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

28025.



...Thompson

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