Headline:
Dense Fog Advisory issued July 27 at 2:00AM EDT until July 27 at 12:00PM EDT by NWS Marquette MI
Event:
Dense Fog Advisory
Urgency:
Expected
Effective:
July 26, 2026 - 11:00pm
Expires:
July 27, 2026 - 9:00am
Description:
* 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, Lake
Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border, 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 noon EDT /11 AM CDT/ today.
* 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 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; 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
Forcast Office:
NWS Marquette MI
Sender:
w-nws.webmaster@noaa.gov