# Dense Fog Advisory: Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island; 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; Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI; Seul Choix Point to 5NM West of Mackinac Bridge; Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay; Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI — retained record

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

Canonical: https://highsignal.app/data/records/e7b007686087f454

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source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-10-22 22:07 ingested 2026-10-23 02:50

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

## extract

Dense Fog Advisory — Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island; 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; Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI; Seul Choix Point to 5NM West of Mackinac Bridge; Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay; Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI
Severity: Minor. Certainty: Likely.
* WHAT...Dense fog will reduce visibility to 1/4 NM or less.

* WHERE...Portions of Lake Huron and Lake Michigan.

* WHEN...Until noon EDT Friday.

* IMPACTS...Low visibility will make navigation difficult.

## 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The historical document was shared with another weather alert and cannot be attributed to this record.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.