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WWUS20 KWNS 300202

SEL7

SPC WW 300202

NDZ000-SDZ000-300900-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 667

NWS Storm Prediction Center Norman OK

905 PM CDT Sun Sep 29 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southern North Dakota

  Western and Northern South Dakota



* Effective this Sunday night and Monday morning from 905 PM

  until 400 AM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible



SUMMARY...Strong to severe thunderstorms will increase through late

evening across western/northern South Dakota into southern North

Dakota. Large hail is the primary risk.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 60 miles northwest of

Rapid City SD to 20 miles north northeast of Aberdeen SD. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU7).



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.



&&



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

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

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

22030.



...Guyer

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