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WWUS20 KWNS 060750

SEL7

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IAZ000-ILZ000-061400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 487

NWS Storm Prediction Center Norman OK

255 AM CDT Sun Sep 6 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central and Eastern Iowa

  Northern Illinois



* Effective this Sunday morning from 255 AM until 900 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...Multiple rounds of storms will persist overnight across

the region, with a more organized linear-type complex potentially

evolving through the early morning hours. Severe hail and locally

damaging wind will be possible as storms steadily progress

southeastward through the early morning hours.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 15 miles north of Fort

Dodge IA to 60 miles east of Moline IL. 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 486...



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 600. Mean storm motion vector

29035.



...Guyer

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