Headline:
Dense Smoke Advisory issued July 20 at 3:42AM EDT until July 20 at 8:00AM EDT by NWS Marquette MI
Event:
Dense Smoke Advisory
Urgency:
Expected
Effective:
July 20, 2026 - 12:42am
Expires:
July 20, 2026 - 5:00am
Description:
* WHAT...Dense smoke will reduce visibility to less than one
nautical mile.
* WHERE...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 8 AM EDT this morning.
* IMPACTS...Low visibility will make navigation difficult.
Instruction:
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
Area Description:
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
Forcast Office:
NWS Marquette MI
Sender: