# Dense Fog Advisory: Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; 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 — retained record

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

Canonical: https://highsignal.app/data/records/25c374f09aa7916c

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


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-10-22 21:34 ingested 2026-10-23 02:50

[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; 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
Severity: Minor. Certainty: Likely.
* WHAT...Dense fog will reduce visibility to less than one
nautical mile.

* WHERE...Lake Superior west of a line from Saxon Harbor WI to
Grand Portage MN beyond 5NM, 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 and
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border.

* WHEN...Until 11 AM EDT /10 AM CDT/ 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The historical document was shared with another weather alert and cannot be attributed to this record.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.