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599 

WWUS20 KWNS 121645

SEL6

SPC WW 121645

IAZ000-MNZ000-130000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 316

NWS Storm Prediction Center Norman OK

1150 AM CDT Mon Jun 12 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern Iowa

  Southern Minnesota



* Effective this Monday morning and evening from 1150 AM until

  700 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Thunderstorms are expected to move into the watch area

from the west, as well as develop along a boundary extending across

the region.  Large hail and damaging winds will be possible in the

strongest cells.



The severe thunderstorm watch area is approximately along and 45

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

Fairmont MN to 10 miles south of La Crosse WI. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU6).



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 60 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

27030.



...Hart

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