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WWUS20 KWNS 240718

SEL8

SPC WW 240718

IAZ000-KSZ000-MOZ000-NEZ000-241500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 308

NWS Storm Prediction Center Norman OK

215 AM CDT Thu Jun 24 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western and central Iowa

  Extreme northeastern Kansas

  Northwestern Missouri

  Southeastern Nebraska



* Effective this Thursday morning from 215 AM until 1000 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...A severe thunderstorm complex initially over eastern

Nebraska has a strong pressure/thermal perturbation and intense

rear-inflow jet, along with history of measured gusts up to 73 kt.

This activity is expected to maintain severe-wind potential east of

watch 307 into parts of adjoining Iowa, northwestern Missouri and

perhaps northeastern Kansas, before it encounters more-stable air

near I-35 and weakens later this morning.



The severe thunderstorm watch area is approximately along and 70

statute miles either side of a line from 35 miles south of Falls

City NE to 30 miles northwest of Des Moines IA. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 307...



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 500. Mean storm motion vector

24035.



...Edwards

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