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247 
WHUS73 KMQT 220134
MWWMQT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
934 PM EDT Fri Mar 21 2025

LSZ241-242-220945-
/O.CON.KMQT.SC.Y.0061.000000T0000Z-250322T1500Z/
/O.CON.KMQT.UP.W.0016.250322T0300Z-250322T1200Z/
Black River to Ontonagon MI-
Ontonagon to Upper Entrance of Portage Canal MI-
934 PM EDT Fri Mar 21 2025 /834 PM CDT Fri Mar 21 2025/

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT /10 AM
CDT/ SATURDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 8 AM EDT
/7 AM CDT/ SATURDAY...

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt 
  with gusts up to 30 kt and waves 6 to 9 ft occurring. For the 
  Heavy Freezing Spray Warning, heavy freezing spray at a rate 
  of 2 cm per hour or greater expected, and may rapidly 
  accumulate on vessels.

* WHERE...Black River to Ontonagon MI and Ontonagon to Upper 
  Entrance of Portage Canal MI.

* WHEN...For the Small Craft Advisory, until 11 AM EDT /10 AM 
  CDT/ Saturday. For the Heavy Freezing Spray Warning, until 8 
  AM EDT /7 AM CDT/ Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

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

&&

$$

LSZ243-244-220945-
/O.CON.KMQT.SC.Y.0061.000000T0000Z-250322T1500Z/
/O.CON.KMQT.UP.W.0016.250322T0200Z-250322T1300Z/
Upper Entrance of Portage Canal to Eagle River MI-
Eagle River to Manitou Island MI-
934 PM EDT Fri Mar 21 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT
SATURDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 9 AM EDT
SATURDAY...

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt
  with gusts up to 30 kt and waves 6 to 11 ft occurring. For the 
  Heavy Freezing Spray Warning, heavy freezing spray at a rate of 
  2 cm per hour or greater expected, and may rapidly accumulate on
  vessels.

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

* WHEN...For the Small Craft Advisory, until 11 AM EDT Saturday. 
  For the Heavy Freezing Spray Warning, until 9 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

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

&&

$$

LSZ245-248-220945-
/O.CON.KMQT.SC.Y.0062.000000T0000Z-250322T1800Z/
/O.CON.KMQT.UP.W.0016.250322T0300Z-250322T1500Z/
Manitou Island to Point Isabelle MI-Huron Islands to Marquette MI-
934 PM EDT Fri Mar 21 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT
SATURDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 11 AM EDT
SATURDAY...

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt
  with gusts up to 30 kt and waves 7 to 10 ft occurring. For the 
  Heavy Freezing Spray Warning, heavy freezing spray at a rate of 
  2 cm per hour or greater expected, and may rapidly accumulate on
  vessels.

* WHERE...Manitou Island to Point Isabelle MI and Huron Islands 
  to Marquette MI.

* WHEN...For the Small Craft Advisory, until 2 PM EDT Saturday. 
  For the Heavy Freezing Spray Warning, until 11 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

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

&&

$$

LSZ249>251-220945-
/O.CON.KMQT.SC.Y.0062.000000T0000Z-250322T2300Z/
/O.CON.KMQT.UP.W.0016.250322T0300Z-250322T1500Z/
Marquette to Munising MI-Munising to Grand Marais MI-
Grand Marais to Whitefish Point MI-
934 PM EDT Fri Mar 21 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT
SATURDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 11 AM EDT
SATURDAY...

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt
  with gusts up to 30 kt and waves 7 to 12 ft occurring. For the 
  Heavy Freezing Spray Warning, heavy freezing spray at a rate of 
  2 cm per hour or greater expected, and may rapidly accumulate on
  vessels.

* WHERE...Marquette to Munising MI, Munising to Grand Marais MI 
  and Grand Marais to Whitefish Point MI.

* WHEN...For the Small Craft Advisory, until 7 PM EDT Saturday. 
  For the Heavy Freezing Spray Warning, until 11 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

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

&&

$$

LSZ263-220945-
/O.CON.KMQT.UP.W.0016.250322T0300Z-250322T1200Z/
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-
934 PM EDT Fri Mar 21 2025

...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 8 AM EDT
SATURDAY...

* WHAT...Heavy freezing spray at a rate of 2 cm per hour or 
  greater expected, and may rapidly accumulate on vessels.

* 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.

* WHEN...Until 8 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of stability.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

&&

$$

LSZ264-220945-
/O.CON.KMQT.UP.W.0016.250322T0200Z-250322T1300Z/
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
934 PM EDT Fri Mar 21 2025

...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 9 AM EDT
SATURDAY...

* WHAT...Heavy freezing spray at a rate of 2 cm per hour or 
  greater expected, and may rapidly accumulate on vessels.

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

* WHEN...Until 9 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of stability.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

&&

$$

LSZ265>267-220945-
/O.CON.KMQT.UP.W.0016.250322T0300Z-250322T1500Z/
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-
934 PM EDT Fri Mar 21 2025

...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 11 AM EDT
SATURDAY...

* WHAT...Heavy freezing spray at a rate of 2 cm per hour or 
  greater expected, and may rapidly accumulate on vessels.

* 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...Until 11 AM EDT Saturday.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of stability.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

&&

$$

LMZ221-248-250-220945-
/O.CON.KMQT.SC.Y.0061.000000T0000Z-250322T1500Z/
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-
934 PM EDT Fri Mar 21 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT
SATURDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and 
  waves 1 to 4 ft occurring.

* 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...Until 11 AM EDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LSZ240-220945-
/O.CON.KMQT.SC.Y.0061.000000T0000Z-250322T1500Z/
Saxon Harbor WI to Black River MI-
934 PM EDT Fri Mar 21 2025 /834 PM CDT Fri Mar 21 2025/

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT /10 AM
CDT/ SATURDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and 
  waves 4 to 7 ft occurring.

* WHERE...Saxon Harbor WI to Black River MI.

* WHEN...Until 11 AM EDT /10 AM CDT/ Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LSZ246-247-220945-
/O.CON.KMQT.SC.Y.0062.000000T0000Z-250322T1800Z/
Point Isabelle to Lower Entrance of Portage Canal MI-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
934 PM EDT Fri Mar 21 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT
SATURDAY...

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt and 
  waves 1 to 4 ft occurring.

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

* WHEN...Until 2 PM EDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$