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016 

WWUS20 KWNS 160246

SEL8

SPC WW 160246

IAZ000-MNZ000-WIZ000-160800-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 218

NWS Storm Prediction Center Norman OK

950 PM CDT Mon May 15 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Far northeast Iowa

  Southern Minnesota

  Western Wisconsin



* Effective this Monday night and Tuesday morning from 950 PM

  until 300 AM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Atop a relatively stable near-surface layer, elevated

thunderstorms will continue to increase and pose mostly a large hail

threat through the late evening and overnight hours.



The severe thunderstorm watch area is approximately along and 40

statute miles north and south of a line from 40 miles northwest of

Fairmont MN to 45 miles east of La Crosse WI. 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 213...WW 214...WW

215...WW 216...WW 217...



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 550. Mean storm motion vector

25030.



...Guyer

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