SPC Severe Thunderstorm Watch 669



WW 669 SEVERE TSTM MN WI 302335Z – 010500Z

WW 0669 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 669
NWS Storm Prediction Center Norman OK
635 PM CDT Mon Sep 30 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Eastern and southern Minnesota
  Northwest Wisconsin

* Effective this Monday night from 635 PM until Midnight CDT.

* Primary threats include...
  Isolated damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...Storms should continue to intensify initially across
eastern/southern Minnesota early this evening. While there is some
uncertainty regarding the overall coverage/likelihood of severe
storms this evening, the environment supports the possibility of
isolated large hail, locally damaging winds and perhaps a tornado.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 95 miles north northeast
of Minneapolis MN to 25 miles east southeast of Fairmont 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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
24035.

...Guyer

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