

329 

WWUS20 KWNS 200619

SEL9

SPC WW 200619

MNZ000-WIZ000-201000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 489

NWS Storm Prediction Center Norman OK

120 AM CDT Wed Sep 20 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  East-central Minnesota

  Northwest Wisconsin



* Effective this Wednesday morning from 120 AM until 500 AM CDT.



* Primary threats include...

  Isolated damaging wind gusts to 70 mph possible

  Isolated large hail events to 1 inch in diameter possible



SUMMARY...Line of strong to severe storms will progress east across

the Saint Croix Valley, likely weakening towards daybreak.



The severe thunderstorm watch area is approximately along and 55

statute miles east and west of a line from 20 miles west northwest

of Duluth MN to 5 miles east southeast of Minneapolis MN. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 488...



AVIATION...A few severe thunderstorms with hail surface and aloft to

1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few

cumulonimbi with maximum tops to 550. Mean storm motion vector

25045.



...Grams

