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Ended official alertUpdated

Special Marine Warning for Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake

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... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 448 AM CDT, a severe thunderstorm was located 18 nm northeast of Harrison-Dever Crib, moving east at 30 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar indicated. IMPACT...Small craft...

What the bulletin says to do

Move to safe harbor until hazardous weather passes.

Read official NWS bulletin

Full official description

Bulletin details

For the following areas... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 448 AM CDT, a severe thunderstorm was located 18 nm northeast of Harrison-Dever Crib, moving east at 30 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. The severe thunderstorm will remain over mainly open waters.

Lifecycle record

Official revisions

4 captured
  1. Update

    Special Marine Warning issued August 11 at 4:48AM CDT until August 11 at 5:00AM CDT by NWS Chicago IL

    Official revision
  2. Update

    Special Marine Warning issued August 11 at 4:29AM CDT until August 11 at 5:00AM CDT by NWS Chicago IL

    Official revision
  3. Update

    Special Marine Warning issued August 11 at 4:07AM CDT until August 11 at 5:00AM CDT by NWS Chicago IL

    Official revision
  4. Alert

    Special Marine Warning issued August 11 at 3:34AM CDT until August 11 at 5:00AM CDT by NWS Chicago IL

    Official revision

Source and limitations

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

CAP status
Actual
Message type
Update
Last collected
Methodology and corrections