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WWUS20 KWNS 241849

SEL1

SPC WW 241849

IAZ000-ILZ000-WIZ000-250000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 461

NWS Storm Prediction Center Norman OK

150 PM CDT Tue Aug 24 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  northern Iowa

  northwestern Illinois

  southwestern Wisconsin



* Effective this Tuesday afternoon and evening from 150 PM until

  700 PM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...One or two clusters of thunderstorms may continue to

evolve and organize through late afternoon, posing a risk for severe

hail and damaging wind gusts as they spread east-southeastward

across the region.



The severe thunderstorm watch area is approximately along and 55

statute miles north and south of a line from 35 miles west of Fort

Dodge IA to 40 miles east southeast of Dubuque IA. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU1).



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 60 knots. A

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

28035.



...Kerr

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