Marine Weather Message
Issued by NWS Marquette, MI

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926
WHUS73 KMQT 170958
MWWMQT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
Issued by National Weather Service Green Bay WI
558 AM EDT Sat May 17 2025

LSZ264-172200-
/O.NEW.KMQT.GL.W.0036.250517T1800Z-250518T0000Z/
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
558 AM EDT Sat May 17 2025

...GALE WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT
THIS EVENING...

* WHAT...North winds 20 to 25 kt with gusts up to 35 kt and
  waves 5 to 8 ft expected.

* WHERE...Lake Superior from Upper Entrance to Portage Canal to
  Manitou Island MI 5NM off shore to the US/Canadian Border.

* WHEN...From 2 PM this afternoon to 8 PM EDT this evening.

* IMPACTS...Strong winds will cause hazardous waves which could
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

LSZ243-244-172200-
/O.EXB.KMQT.SC.Y.0102.250517T1800Z-250518T1800Z/
Upper Entrance of Portage Canal to Eagle River MI-
Eagle River to Manitou Island MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO
2 PM EDT SUNDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 35 kt and
  waves 6 to 9 ft expected.

* WHERE...Upper Entrance of Portage Canal to Eagle River MI and
  Eagle River to Manitou Island MI.

* WHEN...From 2 PM this afternoon to 2 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ266-267-171500-
/O.CON.KMQT.MF.Y.0006.000000T0000Z-250517T1500Z/
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-
558 AM EDT Sat May 17 2025

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS
MORNING...

* WHAT...Dense fog will reduce visibility to less than one
  nautical mile.

* WHERE...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 11 AM EDT this morning.

* IMPACTS...Low visibility will make navigation difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

LMZ221-248-250-172200-
/O.CON.KMQT.SC.Y.0102.250517T2300Z-250518T1200Z/
Green Bay North of line from Cedar River MI to Rock Island
Passage-Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 8 AM EDT SUNDAY...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 25 kt and
  waves 1 to 3 ft expected.

* WHERE...Green Bay North of line from Cedar River MI to Rock
  Island Passage, Seul Choix Point to Point Detour MI and 5NM
  East of a line from Fairport MI to Rock Island Passage.

* WHEN...From 7 PM this evening to 8 AM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ245-172200-
/O.CON.KMQT.SC.Y.0102.250517T1800Z-250518T1500Z/
Manitou Island to Point Isabelle MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 11 AM EDT SUNDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and
  waves 2 to 5 ft expected.

* WHERE...Manitou Island to Point Isabelle MI.

* WHEN...From 2 PM this afternoon to 11 AM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ246-172200-
/O.CON.KMQT.SC.Y.0102.250517T1800Z-250518T0200Z/
Point Isabelle to Lower Entrance of Portage Canal MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 10 PM EDT THIS EVENING...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt and
  waves 1 to 2 ft expected.

* WHERE...Point Isabelle to Lower Entrance of Portage Canal MI.

* WHEN...From 2 PM this afternoon to 10 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ247-172200-
/O.CON.KMQT.SC.Y.0102.250517T2000Z-250518T0000Z/
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 8 PM EDT THIS EVENING...

* WHAT...Northwest winds 10 to 15 kt with gusts up to 25 kt and
  waves 1 to 3 ft expected.

* WHERE...Lower Entrance of Portage Canal To Huron Islands MI
  Including Keweenaw and Huron Bays.

* WHEN...From 4 PM this afternoon to 8 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ248-249-172200-
/O.CON.KMQT.SC.Y.0102.250517T1800Z-250519T0000Z/
Huron Islands to Marquette MI-Marquette to Munising MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 8 PM EDT SUNDAY...

* WHAT...Northwest winds 15 to 25 kt with a few gale force gusts
  up to 35 kt and waves 6 to 9 ft expected.

* WHERE...Huron Islands to Marquette MI and Marquette to
  Munising MI.

* WHEN...From 2 PM this afternoon to 8 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ250-172200-
/O.CON.KMQT.SC.Y.0102.250517T2000Z-250519T0000Z/
Munising to Grand Marais MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 8 PM EDT SUNDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and
  waves 6 to 9 ft expected.

* WHERE...Munising to Grand Marais MI.

* WHEN...From 4 PM this afternoon to 8 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LSZ251-172200-
/O.CON.KMQT.SC.Y.0102.250518T0200Z-250518T1500Z/
Grand Marais to Whitefish Point MI-
558 AM EDT Sat May 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 11 AM EDT SUNDAY...

* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and
  waves 3 to 6 ft expected.

* WHERE...Grand Marais to Whitefish Point MI.

* WHEN...From 10 PM this evening to 11 AM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$