NWS coastal zone LMZ777

Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake weather alerts

Marine alerts linked to this verified National Weather Service zone.

NWS feedSource unavailableThe current alert state is unknown. Last successful check: Sep 7, 2026, 3:00 AM UTC.

Current answer

Active alert check

Current status unknown

NWS updates are unavailable, so this service cannot confirm whether Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake has no active alerts.

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Official zone ID: LMZ777
Zone type: coastal
State: Marine or multi-state area
Metadata verified: Yes, from NWS

Context only

Recently ended alerts

Ended Official severity: Severe

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

Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake, Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake

Ended Sep 5, 2026, 5:00 AM UTC

Ended Official severity: Severe

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

Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake

Ended Sep 5, 2026, 4:54 AM UTC

Ended Official severity: Severe

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

Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake

Ended Sep 5, 2026, 4:59 AM UTC

Ended Official severity: Severe

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

Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake, Winthrop Harbor to Wilmette Harbor IL

Ended Sep 3, 2026, 4:59 PM UTC

Ended Official severity: Minor

Marine Weather Statement for Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake +1 more

Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake, Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake, Wilmette Harbor to Northerly Island IL and 1 more

Ended Sep 3, 2026, 4:00 PM UTC

Ended Official severity: Minor

Marine Weather Statement for Winthrop Harbor to Wilmette Harbor IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake

Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake, Winthrop Harbor to Wilmette Harbor IL

Ended Sep 3, 2026, 3:00 PM UTC

Ended Official severity: Minor

Marine Weather Statement for Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake +1 more

Ended Aug 30, 2026, 7:30 PM UTC

Ended Official severity: Minor

Marine Weather Statement for Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL +2 more

Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake, Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake, Northerly Island to Calumet Harbor IL and 2 more

Ended Aug 23, 2026, 1:15 AM UTC

Zone matching is not a personal forecast

This page uses official NWS zone membership. For exact location matching, an alert must include official geometry or be linked to a verified zone geometry that contains the point.

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