Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EDT 21 July 2024

Tonight and Monday. Wind northwest 5 to 10 knots becoming light near midnight then becoming northeast 10 Monday evening.

Extended Forecast


Issued 06:30 PM EDT 21 July 2024
Tuesday Wind light becoming northeast 10 to 15 knots in the afternoon.
Wednesday Wind northeast 10 to 15 knots becoming light.
Thursday Wind light becoming northwest 10 to 15 knots.

Waves


Issued 06:30 PM EDT 21 July 2024

Tonight and Monday. Waves 0.5 metres or less.

 

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



  
941  
FZUS63 KMQT 220138  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
938 PM EDT SUN JUL 21 2024  
 
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
 
30.1 INCH RIDGE HAS SETTLED OVER LAKE SUPERIOR AND  
WILL STICK AROUND THROUGH MUCH OF MONDAY. WEAK 30.0 INCH TROUGHING  
EXTENDING OVER THE HIGH PLAINS AND WESTERN GREAT LAKES DEVELOPS  
MONDAY NIGHT, DEEPENING TO 29.9 INCHES TUESDAY BEFORE A RIDGE  
BUILDS TO 30.1 INCHES OVER THE LAKE FOR WEDNESDAY AND THURSDAY.  
THIS RIDGE BEGINS TO BREAK DOWN LATE FRIDAY AS LOW PRESSURE  
DEVELOPS IN THE NORTHERN PLAINS INTO THE WEEKEND.  
 
LSZ162-220945-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
938 PM EDT SUN JUL 21 2024 /838 PM CDT SUN JUL 21 2024/  
   
REST OF TONIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST  
AFTER MIDNIGHT, THEN BACKING WEST LATE. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE. A  
SLIGHT CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF  
THUNDERSTORMS AND A SLIGHT CHANCE OF SHOWERS. WAVES BUILDING TO  
2 TO 4 FEET.    
TUESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.  
WAVES CALM TO 2 FEET.  
 

 
 
LSZ263-220945-  
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-  
938 PM EDT SUN JUL 21 2024  
   
REST OF TONIGHT
 
SOUTHEAST WINDS LESS THAN 10 KNOTS VEERING  
SOUTHWEST LATE. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE. A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID AFTERNOON.  
WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET.    
TUESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS  
AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH EARLY AFTERNOON.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN  
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.   
WEDNESDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.  
WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ264-220945-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
938 PM EDT SUN JUL 21 2024  
   
REST OF TONIGHT
 
SOUTH WINDS LESS THAN 10 KNOTS VEERING  
SOUTHWEST AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE. A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID AFTERNOON.  
WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES BUILDING TO  
2 TO 4 FEET.    
TUESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF  
THUNDERSTORMS THROUGH EARLY AFTERNOON. A CHANCE OF SHOWERS. WAVES  
SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES  
CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ265-220945-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
938 PM EDT SUN JUL 21 2024  
   
REST OF TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
LATE. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING EAST IN THE  
AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS LATE. WAVES CALM TO  
2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.  
WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS  
AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH  
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO  
2 FEET.    
FRIDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ266-220945-  
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-  
938 PM EDT SUN JUL 21 2024  
   
REST OF TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT, THEN BACKING SOUTH LATE. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST LATE. WAVES CALM  
TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER  
MIDNIGHT, THEN VEERING EAST LATE. A CHANCE OF SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY
 
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS AND A SLIGHT  
CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.  
WAVES CALM TO 2 FEET.  
 

 
 
LSZ267-220945-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
938 PM EDT SUN JUL 21 2024  
   
REST OF TONIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING  
SOUTHWEST LATE. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST IN THE  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER  
MIDNIGHT, THEN BECOMING EAST 10 TO 20 KNOTS LATE. A CHANCE OF  
SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES  
CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF  
THUNDERSTORMS. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST  
5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
LSZ261-220945-  
MAFOR 2203/  
SUPERIOR WEST 11200 11700 11600 12500 11400 12110. A CHANCE OF  
SHOWERS AND THUNDERSTORMS MONDAY EVENING. WAVES 2 FEET OR LESS.  
 
SUPERIOR NORTH CENTRAL 11400 14500 11500 12100. WAVES 1 FOOT OR  
LESS.  
 
SUPERIOR SOUTH CENTRAL 13400 11500 11400 11300 12200. WAVES 1  
FOOT OR LESS.  
 
SUPERIOR EAST 11600 12500 12400 11300 12200. WAVES 1 FOOT OR  
LESS.  
 

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




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