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WWUS20 KWNS 020117

SEL4

SPC WW 020117

IAZ000-MOZ000-020700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 364

NWS Storm Prediction Center Norman OK

820 PM CDT Sat Sep 1 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central and southern Iowa

  Northwestern Missouri



* Effective this Saturday night and Sunday morning from 820 PM

  until 200 AM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Clusters of severe storms ongoing in central/southeastern

Iowa will likely persist for a few more hours with an attendant

threat for large hail and isolated damaging gusts.  Farther west, a

couple of clusters of severe storms will spread from southeastern

Nebraska and northeastern Kansas into southwestern Iowa and

northwestern Missouri.  Damaging winds and large hail will be

possible with these storms for the next several hours, prior to

expected weakening late tonight.



The severe thunderstorm watch area is approximately along and 45

statute miles north and south of a line from 25 miles west of

Shenandoah IA to 35 miles east southeast of Cedar Rapids IA. 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 363...



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 550. Mean storm motion vector

27025.



...Thompson

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