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Special Marine Warning for Rock Island Passage to Sturgeon Bay WI; Sturgeon Bay to Two Rivers WI; Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake +1 more

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

Effective
Ended
Official severity
Severe
Official urgency
Immediate
Official certainty
Likely

What is happening

For the following areas... Nearshore waters from Washington Island to Two Rivers... Open waters of Lake Michigan from Rock Island Passage to Two Rivers... At 1007 AM CDT, a severe thunderstorm capable of producing waterspouts was located near Algoma, or 11 NM northeast of Kewaunee Pierhead Light, moving east at 20...

What the bulletin says to do

Move to safe harbor until hazardous weather passes. Boaters should seek safe harbor immediately until this storm passes. Wind gusts 34 knots or greater, high waves, dangerous lightning, and heavy rain are possible with this storm.

Read official NWS bulletin

Full official description

Bulletin details

For the following areas... Nearshore waters from Washington Island to Two Rivers... Open waters of Lake Michigan from Rock Island Passage to Two Rivers... At 1007 AM CDT, a severe thunderstorm capable of producing waterspouts was located near Algoma, or 11 NM northeast of Kewaunee Pierhead Light, moving east at 20 knots. HAZARD...Waterspouts, large hail, and wind gusts in excess of 50 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds and hail. Small craft could capsize in suddenly higher waves. The strong thunderstorm will be near... Algoma around 1010 AM CDT.

Lifecycle record

Official revisions

2 captured
  1. Update

    Special Marine Warning issued July 27 at 10:07AM CDT until July 27 at 10:30AM CDT by NWS Green Bay WI

    Official revision
  2. Alert

    Special Marine Warning issued July 27 at 9:34AM CDT until July 27 at 10:30AM CDT by NWS Green Bay WI

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS Green Bay WI. This page reorganizes official fields and does not add a forecast or expand the affected area.

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Actual
Message type
Update
Last collected
Methodology and corrections