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423 

WWUS20 KWNS 062041

SEL4

SPC WW 062041

MTZ000-NDZ000-SDZ000-WYZ000-070500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 334

NWS Storm Prediction Center Norman OK

245 PM MDT Mon Jul 6 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southeast Montana

  Southwest North Dakota

  Western South Dakota

  Northeast Wyoming



* Effective this Monday afternoon and evening from 245 PM until

  1100 PM MDT.



* Primary threats include...

  Scattered large hail likely with isolated very large hail events

    to 3 inches in diameter possible

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  A tornado or two possible



SUMMARY...Widely scattered thunderstorms will increase and intensify

across the region through late afternoon/early evening. Large hail,

perhaps very large, will be possibly with supercells, particularly

across southeast Montana, far northeast Wyoming into western South

Dakota. A tornado cannot be ruled out. Storms may merge into

southeastward-moving clusters by evening with severe hail/wind

continuing.



The severe thunderstorm watch area is approximately along and 90

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

of Miles City MT to 15 miles northeast of Philip SD. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU4).



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 333...



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

3 inches. Extreme turbulence and surface wind gusts to 65 knots. A

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

31020.



...Guyer

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