# Dense Fog Advisory: Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Upper Entrance of Portage Canal to Eagle River MI; Eagle River to Manitou Island MI; Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border; Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore; 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/16ab33c198ab2210

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


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-07-09 04:58 ingested 2026-07-09 09:41

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

## extract

Dense Fog Advisory — Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Upper Entrance of Portage Canal to Eagle River MI; Eagle River to Manitou Island MI; Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border; Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore; 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...Portions of Central, Eastern and Western Lake Superior.

* WHEN...Until 11 AM EDT /10 AM CDT/ this morning.

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The historical document was shared with another weather alert and cannot be attributed to this record.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