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WWUS20 KWNS 022138

SEL9

SPC WW 022138

IAZ000-MNZ000-WIZ000-030500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 239

NWS Storm Prediction Center Norman OK

440 PM CDT Tue Jun 2 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern Iowa

  Southern Minnesota

  West central and southwest Wisconsin



* Effective this Tuesday afternoon from 440 PM until Midnight

  CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter likely



SUMMARY...Thunderstorms are developing along a surface cold front

across southern Minnesota, and these storms are expected to

intensify and spread east-southeastward through late evening.  Large

hail and damaging gusts can be expected with the storms along the

front, with a mix of multicell clusters and perhaps some embedded

supercells.  Other elevated convection well north of the front may

also pose some threat for isolated large hail/damaging gusts.



The severe thunderstorm watch area is approximately along and 45

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

Worthington MN to 45 miles east of La Crosse WI. 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.



&&



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

27030.



...Thompson

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