603  
FZUS63 KMQT 110135  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
935 PM EDT FRI MAY 10 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
 
A WEAK 29.7 INCH CLIPPER IS ACTIVELY MOVING ACROSS  
CENTRAL LAKE SUPERIOR AND WILL PASS SOUTHEAST OVER THE UPPER  
GREAT LAKES TONIGHT. A 29.8 INCH RIDGE WILL BUILD IN BRIEFLY ON  
SATURDAY BEFORE ANOTHER CLIPPER AT 29.6 INCHES APPROACHES FROM THE  
NORTHWEST EARLY SUNDAY MORNING. THIS SECOND CLIPPER PASSES  
SOUTHEAST OVER LAKE SUPERIOR THROUGH SUNDAY. HIGH PRESSURE NEAR  
29.9 INCHES BUILDS IN FROM NORTHERN ONTARIO BEHIND THE PASSING  
CLIPPER TUESDAY, STEADILY RISING TO 30.1 INCHES BY WEDNESDAY.  
 
LSZ162-110945-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
935 PM EDT FRI MAY 10 2024 /835 PM CDT FRI MAY 10 2024/  
   
REST OF TONIGHT
 
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY  
LATE EVENING. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN  
THE AFTERNOON, THEN BECOMING SOUTH 10 TO 20 KNOTS LATE. WAVES  
CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID  
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO  
CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
NORTH WINDS 10 TO 20 KNOTS VEERING SOUTH BY MID  
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES  
CALM TO 2 FEET.    
WEDNESDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ263-110945-  
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-  
935 PM EDT FRI MAY 10 2024  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS BY LATE EVENING.  
WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE.  
WAVES BUILDING TO 1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS LATE. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM  
TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. A  
SLIGHT CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES 1 TO  
3 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET,  
THEN BUILDING TO 1 TO 3 FEET.    
MONDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO 15 KNOTS  
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM  
TO 2 FEET.    
WEDNESDAY
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ264-110945-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
935 PM EDT FRI MAY 10 2024  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS BY LATE EVENING.  
WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST LATE.  
WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH  
AFTER MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. A CHANCE  
OF RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN  
BUILDING TO 1 TO 3 FEET.    
MONDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS  
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM TO  
2 FEET.    
WEDNESDAY
 
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST. A CHANCE  
OF RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ265-110945-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
935 PM EDT FRI MAY 10 2024  
   
REST OF TONIGHT
 
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST  
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS IN THE AFTERNOON, THEN DIMINISHING TO 5 TO 15 KNOTS  
LATE. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.  
WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER  
MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. A SLIGHT CHANCE  
OF RAIN SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS  
BY MID AFTERNOON. A CHANCE OF SHOWERS. A SLIGHT CHANCE OF  
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET,  
THEN SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. A  
CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ266-110945-  
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-  
935 PM EDT FRI MAY 10 2024  
   
REST OF TONIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER  
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS LATE. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY  
AFTERNOON. WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST  
AFTER MIDNIGHT, THEN BECOMING SOUTH 10 TO 20 KNOTS LATE. A SLIGHT  
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO  
3 FEET.    
SUNDAY
 
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT  
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN  
BUILDING TO 1 TO 3 FEET.    
MONDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH  
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.    
TUESDAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST  
10 TO 20 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ267-110945-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
935 PM EDT FRI MAY 10 2024  
   
REST OF TONIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH  
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST IN THE  
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY  
AFTERNOON. WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST  
5 TO 15 KNOTS AFTER MIDNIGHT, THEN BACKING SOUTH LATE. A SLIGHT  
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES  
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. WAVES  
CALM TO 2 FEET.  
 

 
LSZ261-110945-  
MAFOR 1103/  
SUPERIOR WEST 11610 13710 11600 11510 12410. WAVES 1 TO 2 FEET.  
 
SUPERIOR NORTH CENTRAL 11700 11800 13710 11610 11620 11610. WAVES  
2 FEET OR LESS.  
 
SUPERIOR SOUTH CENTRAL 11800 12700 13710 11700 11600. A CHANCE OF  
RAIN SHOWERS OVERNIGHT. WAVES 2 FEET OR LESS.  
 
SUPERIOR EAST 11200 12800 11810 14710. A CHANCE OF RAIN SHOWERS  
OVERNIGHT AND SATURDAY MORNING. WAVES 2 FEET 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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