# Dense Fog Advisory: Munising to Grand Marais MI; Grand Marais to Whitefish Point MI; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore; Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border — retained record

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

Canonical: https://highsignal.app/data/records/2ca418e4463ed79f

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source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-09-28 19:46 ingested 2026-09-29 02:54

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

## extract

Dense Fog Advisory — Munising to Grand Marais MI; Grand Marais to Whitefish Point MI; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore; Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
Severity: Minor. Certainty: Likely.
* WHAT...Dense fog will reduce visibility to less than one
nautical mile.

* WHERE...Munising to Grand Marais MI, Grand Marais to Whitefish
Point MI, Lake Superior East of a line from Manitou Island to
Marquette MI and West of a line from Grand Marais MI to the
US/Canadian Border Beyond 5NM from shore and Lake Superior
from Grand Marais MI to Whitefish Point MI 5NM off shore to
the US/Canadian border.

* WHEN...Until 8 AM EDT Tuesday.

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The historical document was shared with another weather alert and cannot be attributed to this record.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