Marine Weather Forecast from Environment Canada

Winds


Issued 03:00 AM EDT 15 June 2021

Today Tonight and Wednesday. Wind north 10 knots increasing to northwest 15 near noon then diminishing to north 10 near midnight. Wind becoming light Wednesday morning then becoming south 10 Wednesday evening.

Extended Forecast


Issued 03:00 AM EDT 15 June 2021
Thursday Wind south 15 knots.
Friday Wind west 15 knots.
Saturday Wind northwest 20 knots.

Waves


Issued 03:00 AM EDT 15 June 2021

Today Tonight and Wednesday. Waves one half metre or less building to one half to one metre this afternoon then subsiding to one half metre or less overnight.

 

Lake Superior Mafor Forecast and Weather Conditions
From NOAA National Weather Service Weather Forecast Office



  
073  
FZUS63 KMQT 150732  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
332 AM EDT TUE JUN 15 2021  
 
FOR WATERS BEYOND 5 NAUTICAL MILES OF SHORE ON LAKE SUPERIOR.  
 
WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE  
HIGHEST 1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE  
AVERAGE OF THE HIGHEST 1/10 OF THE WAVE SPECTRUM.  
   
SYNOPSIS
 
30.0 INCH RIDGING WILL REMAIN OVER THE REGION THROUGH  
LATE WEDNESDAY, PEAKING AT 30.2 INCHES OVER LAKE SUPERIOR LATER  
TODAY AND EARLY WEDNESDAY. A 29.6 INCH TROUGH WILL THEN MOVE INTO  
LAKE SUPERIOR FROM THE WEST LATE THURSDAY. WEAK RIDGING OF 29.8  
INCHES WILL THEN BUILD BACK ACROSS LAKE SUPERIOR BY SATURDAY.  
 
LSZ162-151500-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
332 AM EDT TUE JUN 15 2021 /232 AM CDT TUE JUN 15 2021/  
   
EARLY THIS MORNING
 
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TODAY
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST LATE. WAVES  
CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH IN THE  
AFTERNOON, THEN BACKING EAST LATE. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
FRIDAY
 
WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ263-151500-  
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-  
332 AM EDT TUE JUN 15 2021  
   
EARLY THIS MORNING
 
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TODAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN THE  
AFTERNOON, THEN BACKING WEST LATE. WAVES CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE. WAVES  
CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH LATE.  
WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO  
1 TO 3 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO  
3 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS.  
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ264-151500-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
332 AM EDT TUE JUN 15 2021  
   
EARLY THIS MORNING
 
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TODAY
 
NORTH WINDS 5 TO 15 KNOTS BACKING WEST LATE. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH LATE.  
WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES 1 TO  
3 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST  
5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ265-151500-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
332 AM EDT TUE JUN 15 2021  
   
EARLY THIS MORNING
 
NORTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG.  
WAVES CALM TO 2 FEET.    
TODAY
 
NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE  
AFTERNOON, THEN BACKING NORTHWEST LATE. WAVES CALM TO 2 FEET.    
TONIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST LATE. WAVES  
CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN  
THE AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES  
CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS.  
WAVES BUILDING TO 1 TO 3 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST  
5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ266-151500-  
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-  
332 AM EDT TUE JUN 15 2021  
   
EARLY THIS MORNING
 
NORTH WINDS 5 TO 15 KNOTS. PATCHY FOG.  
WAVES CALM TO 2 FEET.    
TODAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE  
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO  
15 KNOTS AFTER MIDNIGHT, THEN BACKING NORTHWEST LATE. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH LATE. WAVES  
CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
THURSDAY
 
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES 1 TO 3 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO  
3 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS.  
WAVES BUILDING TO 2 TO 4 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES  
SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ267-151500-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
332 AM EDT TUE JUN 15 2021  
   
EARLY THIS MORNING
 
NORTH WINDS 10 TO 20 KNOTS. PATCHY FOG.  
WAVES CALM TO 2 FEET.    
TODAY
 
NORTHWEST WINDS 10 TO 20 KNOTS. PATCHY DENSE FOG THROUGH  
EARLY AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER  
MIDNIGHT, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
WEDNESDAY
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES  
SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ261-151500-  
MAFOR 1509/  
SUPERIOR WEST 12800 11100 11200 11500 11700 11800 11500. WAVES 1  
FOOT OR LESS.  
 
SUPERIOR NORTH CENTRAL 12810 11710 11700 11600 12610 11600. WAVES  
1 TO 2 FEET.  
 
SUPERIOR SOUTH CENTRAL 11700 15710 11700. WAVES 1 TO 2 FEET.  
 
SUPERIOR EAST 12810 11710 13720 11810 11800. WAVES 1 TO 3 FEET.  
 

 
 
MZ  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MQT/GLFTABLE  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 




Random Weather Facts

ADVISORIES
A statement generally provides additional or follow up information to an existing weather condition. An advisory is for less serious conditions that cause significant inconvenience and, if caution is not exercised, could lead to situations that may threaten life and/or property. A watch is used when the risk of a hazardous weather event has increased significantly, but its occurrence, locations, and/or timing is still uncertain. It is intended to provide advance notice of possible inclement weather. A warning is used for conditions posing an immediate threat to life or property. Depending on the type of warning, you should take immediate, appropriate action.