

148 

WWUS20 KWNS 172018

SEL8

SPC WW 172018

MNZ000-SDZ000-WIZ000-LSZ000-180400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 418

NWS Storm Prediction Center Norman OK

320 PM CDT Mon Jul 17 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central Minnesota

  Northeast South Dakota

  Northwest Wisconsin

  Lake Superior



* Effective this Monday afternoon and evening from 320 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered large hail likely with isolated very large hail events

    to 2 inches in diameter possible

  Scattered damaging wind gusts to 70 mph likely

  A tornado or two possible



SUMMARY...Thunderstorms will continue to intensify over west-central

MN and track eastward across the watch area this afternoon and

evening.  A few of the storms will become capable of damaging wind

gusts and large hail.  An isolated tornado is also possible.



The severe thunderstorm watch area is approximately along and 55

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

southwest of Detroit Lakes MN to 30 miles east southeast of Duluth

MN. 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 417...



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

26030.



...Hart

