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Small Craft Advisory — St Ignace to False Detour Channel, LH, LHZ347, LHZ348, LHZ349
Issued
Expires
10:00 PM CDT · Wed, Jul 22 2026
Issuing Office
NWS KAPX

Affected Areas

St Ignace to False Detour Channel, LH LHZ347 LHZ348 LHZ349

Official Bulletin

* WHAT...Highest gusts up to 30 kts from the west tonight, turning
northwest Tuesday morning. Highest waves around 10 feet.

* WHERE...St Ignace to False Detour Channel, 5NM East of
Mackinac Bridge to Presque Isle Light MI including Bois Blanc
Island, Presque Isle Light to Sturgeon Pt MI Including Thunder
Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI.

* WHEN...Until 11 PM EDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.