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 - 12:45pm
Description:
* WHAT...For the Dense Smoke Advisory, dense smoke will reduce
visibility to less than one nautical mile. For the Gale Watch,
northwest winds 20 to 30 kt with gusts up to 40 kt and waves 7
to 10 ft possible.
* WHERE...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 and Lake Superior from Grand Marais MI to Whitefish
Point MI 5NM off shore to the US/Canadian border.
* WHEN...For the Dense Smoke Advisory, until 8 AM EDT this
morning. For the Gale Watch, from Tuesday morning through late
Tuesday night.
* IMPACTS...Strong winds can cause hazardous waves which could
capsize or damage vessels and reduce visibility. Low visibility
will make navigation difficult.
Instruction:
Mariners should consider altering plans to avoid possible
hazardous conditions. Remain in port, seek safe harbor, alter
course, and/or secure the vessel for severe wind and waves.
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 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
Forcast Office:
NWS Marquette MI
Sender: