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WWUS20 KWNS 200455

SEL1

SPC WW 200455

IAZ000-MNZ000-SDZ000-201200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 601

NWS Storm Prediction Center Norman OK

1155 PM CDT Mon Aug 19 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western and central Iowa

  Far southwest Minnesota

  Far southeast South Dakota



* Effective this Monday night and Tuesday morning from 1155 PM

  until 700 AM 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 2.5

    inches in diameter possible



SUMMARY...Multiple elevated supercells will likely develop through

the early morning hours before growing upscale into a linear cluster

that may eventually bow across central to south-central Iowa.



The severe thunderstorm watch area is approximately along and 75

statute miles east and west of a line from 45 miles east of Lamoni

IA to 15 miles west northwest of Worthington MN. 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

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

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

33030.



...Grams

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