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Special Marine Warning for Wilmette Harbor to Northerly Island IL; 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... Nearshore Waters from Wilmette Harbor to Northerly Island... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 146 PM CDT, severe thunderstorms were located from Evanston toward south central Lake Michigan, and were moving southeast at around 20 knots. HAZARD...Wind...

What the bulletin says to do

Boaters should seek safe harbor immediately until this storm passes. Wind gusts 34 knots or greater, large hail, 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 Wilmette Harbor to Northerly Island... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 146 PM CDT, severe thunderstorms were located from Evanston toward south central Lake Michigan, and were moving southeast at around 20 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. Locations impacted include... Harrison-Dever Crib, Montrose Harbor, Monroe Harbor, Belmont Harbor, Diversy Harbor, and DuSable Harbor.

Lifecycle record

Official revisions

2 captured
  1. Update

    Special Marine Warning issued July 27 at 1:46PM CDT until July 27 at 3:15PM CDT by NWS Chicago IL

    Official revision
  2. Alert

    Special Marine Warning issued July 27 at 1:40PM CDT until July 27 at 3:15PM 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