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WWUS20 KWNS 200446

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 527

NWS Storm Prediction Center Norman OK

1050 PM MDT Fri Jul 19 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northwestern South Dakota



* Effective this Friday night and Saturday morning from 1050 PM

  until 400 AM MDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Elevated thunderstorms, including supercells, will likely

persist for the next several hours while moving eastward across

northwestern South Dakota.  Large hail will be the primary severe

threat, though isolated damaging cannot be ruled out with clustering

of storms and development a little south of the current storms

during the early morning hours.



The severe thunderstorm watch area is approximately along and 55

statute miles north and south of a line from 40 miles south

southwest of Buffalo SD to 35 miles south southeast of Mobridge 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 526...



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

27035.



...Thompson

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