

212 

WWUS20 KWNS 112057

SEL9

SPC WW 112057

IAZ000-ILZ000-MOZ000-120500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 359

NWS Storm Prediction Center Norman OK

400 PM CDT Sat Jul 11 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Iowa

  Northern Illinois

  Far Northeast Missouri



* Effective this Saturday afternoon from 400 PM until Midnight

  CDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Strong to severe thunderstorms may persist/redevelop along

a northwest/southeast-oriented boundary across the region, while

other storms are expected to further organize across east-central

Iowa and move southeastward into the region. Large hail is possible

but there will be an increasing concern for damaging winds across

the region by evening. A tornado cannot be ruled out, particularly

along the aforementioned boundary.



The severe thunderstorm watch area is approximately along and 65

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

of Cedar Rapids IA to 15 miles north northeast of Danville IL. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU9).



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 356...WW 357...WW 358...



AVIATION...A few severe thunderstorms with hail surface and aloft to

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

few cumulonimbi with maximum tops to 550. Mean storm motion vector

32030.



...Guyer

