057  
FZUS63 KMQT 191943  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
343 PM EDT SUN MAY 19 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 30.0 INCH HIGH PRESSURE OVERHEAD WILL BE DISPLACED  
EASTWARD LATER TONIGHT BY A 29.7 INCH LOW PRESSURE SYSTEM LIFTING  
NORTHEAST THROUGH THE PLAINS. THIS LOW PRESSURE SHIFTS EAST ACROSS  
THE UPPER GREAT LAKES MONDAY AFTERNOON AND EVENING. A PERIOD OF  
WEAK 29.9 INCH RIDGING FOLLOWS FOR LATE MONDAY NIGHT INTO TUESDAY  
MORNING OVER LAKE SUPERIOR. ANOTHER 29.5 INCH LOW PRESSURE  
DEVELOPS OVER THE PLAINS TUESDAY, THEN DEEPENS TO 29.2 INCHES AS  
IT TRACKS OVER WESTERN AND NORTH CENTRAL LAKE SUPERIOR LATE  
TUESDAY NIGHT INTO WEDNESDAY. THE LOW CONTINUES NORTHEASTWARD  
TOWARD JAMES BAY WEDNESDAY AND WEDNESDAY NIGHT AS IT WEAKENS TO  
29.4 INCHES.  
 
LSZ162-200345-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
343 PM EDT SUN MAY 19 2024 /243 PM CDT SUN MAY 19 2024/  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 2 TO  
4 FEET.    
TONIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST AFTER  
MIDNIGHT, THEN BACKING EAST LATE. A CHANCE OF SHOWERS AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST IN THE  
AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT  
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 7 TO  
10 FEET OCCASIONALLY TO 13 FEET.    
TUESDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS. SHOWERS AND A  
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 10 TO 14 FEET  
OCCASIONALLY TO 18 FEET.    
WEDNESDAY
 
NORTH GALES TO 35 KNOTS BACKING WEST BY MID  
AFTERNOON. SHOWERS LIKELY. WAVES SUBSIDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO 2 TO 4 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. A CHANCE  
OF RAIN SHOWERS, THEN RAIN SHOWERS LIKELY. WAVES BUILDING TO 1 TO  
3 FEET.  
 

 
 
LSZ263-200345-  
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-  
343 PM EDT SUN MAY 19 2024  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS AFTER MIDNIGHT, THEN BACKING SOUTHEAST LATE. A SLIGHT  
CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO  
2 FEET.    
MONDAY
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE. A  
CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS BY MID  
AFTERNOON. WAVES 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 INCREASING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS AND A SLIGHT  
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST  
GALES TO 35 KNOTS AFTER MIDNIGHT. SHOWERS AND A CHANCE OF  
THUNDERSTORMS. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO  
15 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST BY MID  
AFTERNOON. SHOWERS LIKELY. WAVES SUBSIDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET, THEN BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST. A CHANCE OF  
RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ264-200345-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
343 PM EDT SUN MAY 19 2024  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTH LESS THAN 10 KNOTS  
LATE. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST IN THE  
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BECOMING NORTH LESS THAN  
10 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 5 TO 15 KNOTS LATE.  
WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID  
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
35 KNOTS AFTER MIDNIGHT. SHOWERS LIKELY THROUGH MIDNIGHT. A  
CHANCE OF THUNDERSTORMS. SHOWERS AFTER MIDNIGHT. WAVES BUILDING  
TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.    
WEDNESDAY
 
SOUTHEAST WINDS 20 TO 30 KNOTS VEERING WEST BY MID  
AFTERNOON. SHOWERS LIKELY. WAVES BUILDING TO 10 TO 14 FEET  
OCCASIONALLY TO 18 FEET, THEN SUBSIDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. A CHANCE  
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ265-200345-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
343 PM EDT SUN MAY 19 2024  
   
LATE THIS AFTERNOON
 
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE. A  
SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO  
20 KNOTS IN THE AFTERNOON. SHOWERS THROUGH EARLY AFTERNOON, THEN  
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST AFTER  
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS  
BY MID AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES  
CALM TO 2 FEET.    
TUESDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST  
20 TO 30 KNOTS AFTER MIDNIGHT. SHOWERS AND A CHANCE OF  
THUNDERSTORMS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST BY MID  
AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ266-200345-  
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-  
343 PM EDT SUN MAY 19 2024  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 2 TO  
4 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
MONDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS IN THE AFTERNOON, THEN BACKING EAST LATE. SHOWERS  
THROUGH EARLY AFTERNOON, THEN A CHANCE OF SHOWERS AND A SLIGHT  
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER  
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. A  
CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST  
20 TO 30 KNOTS AFTER MIDNIGHT. SHOWERS AND A CHANCE OF  
THUNDERSTORMS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO  
11 FEET.    
WEDNESDAY
 
SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST BY MID  
AFTERNOON. A CHANCE OF THUNDERSTORMS THROUGH EARLY AFTERNOON. A  
CHANCE OF SHOWERS. WAVES BUILDING TO 6 TO 10 FEET OCCASIONALLY TO  
13 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A CHANCE  
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ267-200345-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
343 PM EDT SUN MAY 19 2024  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST LATE. A  
CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO  
15 KNOTS AFTER MIDNIGHT, THEN BACKING NORTHWEST LATE. A CHANCE OF  
RAIN SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES CALM TO  
2 FEET.    
TUESDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST  
20 TO 30 KNOTS AFTER MIDNIGHT. SHOWERS AND A CHANCE OF  
THUNDERSTORMS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.    
WEDNESDAY
 
SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST BY MID  
AFTERNOON. SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS THROUGH  
EARLY AFTERNOON, THEN A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES  
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO  
3 FEET.    
FRIDAY
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A CHANCE  
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ261-200345-  
MAFOR 1921/  
SUPERIOR WEST 11520 11510 11400 11300 11200 11216 11210 11110.  
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES 1 TO 2  
FEET MONDAY.  
 
SUPERIOR NORTH CENTRAL 12520 11510 12400 11300 11310 11210. A  
CHANCE OF SHOWERS MONDAY. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3  
FEET TONIGHT. WAVES 1 TO 2 FEET MONDAY.  
 
SUPERIOR SOUTH CENTRAL 11500 14400 11306 11316 11310. WAVES 1  
FOOT OR LESS.  
 
SUPERIOR EAST 12500 13400 11300 11316 11216. WAVES 1 TO 2 FEET.  
 

 
 
WFO MQT  
 
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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