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Ended official alertUpdated

Special Marine Warning for Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN +3 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 Wilmette Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 457 PM CDT, severe thunderstorms were located along a line extending from near Hammond Marina to near...

What the bulletin says to do

Move to safe harbor until hazardous weather passes. Move to safe harbor immediately as gusty winds and high waves are expected.

Read official NWS bulletin

Full official description

Bulletin details

For the following areas... Nearshore Waters from Wilmette Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 457 PM CDT, severe thunderstorms were located along a line extending from near Hammond Marina to near Michigan City, moving south at 30 knots. HAZARD...Wind gusts to nearly 50 knots 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, Wilmette Harbor, 31st Street Harbor, Monroe Harbor, Burns Harbor, Calumet Harbor, Indiana Harbor, Montrose Harbor, Burnham Harbor, Hammond Marina, Jackson Park Harbor, and Belmont Harbor.

Lifecycle record

Official revisions

2 captured
  1. Update

    Special Marine Warning issued July 27 at 4:57PM CDT until July 27 at 5:45PM CDT by NWS Chicago IL

    Official revision
  2. Alert

    Special Marine Warning issued July 27 at 3:38PM CDT until July 27 at 5:45PM 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