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245 

WWUS20 KWNS 232323

SEL9

SPC WW 232323

SDZ000-240600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 349

NWS Storm Prediction Center Norman OK

625 PM CDT Thu Aug 23 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southern South Dakota



* Effective this Thursday night and Friday morning from 625 PM

  until 100 AM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...An initially broken but increasingly organized cluster of

severe thunderstorms will pose the risk of damaging gusts and large

hail into this evening, as it moves eastward across the watch area.



The severe thunderstorm watch area is approximately along and 40

statute miles north and south of a line from 95 miles west of

Chamberlain SD to 35 miles east southeast of Chamberlain SD. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU9).



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 348...



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 550. Mean storm motion vector

27035.



...Edwards

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