

168 

WWUS20 KWNS 201048

SEL8

SPC WW 201048

IAZ000-MNZ000-SDZ000-201600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 528

NWS Storm Prediction Center Norman OK

550 AM CDT Sat Jul 20 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Far northwest Iowa

  Southwest Minnesota

  Southeast South Dakota



* Effective this Saturday morning from 550 AM until 1100 AM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorm cluster with strong to severe wind gusts over

east-central South Dakota should progress east this morning.



The severe thunderstorm watch area is approximately along and 45

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

Huron SD to 35 miles east northeast of Worthington MN. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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

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

few cumulonimbi with maximum tops to 600. Mean storm motion vector

28035.



...Grams

