# Special Marine Warning: Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/7d87c002b04b2007

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-08-16 01:13 ingested 2026-08-16 06:37

[original source ↗](http://www.weather.gov/)

## extract

Special Marine Warning — Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake
Severity: Severe. Certainty: Likely.
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 111 AM CDT, strong thunderstorms were located along a line
extending from near Ohare Airport to Midway Airport to 11 nm
southwest of Gary, moving northeast at 35 knots. An outflow boundary
precedes the thunderstorms by several miles.

HAZARD...Wind gusts 34 knots or greater.

SOURCE...Radar and automated land-based observations.

IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.

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.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.