Marine Weather Forecast from Environment Canada

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

  
164   
FZUS63 KMQT 300147  
GLFLS   
  
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
947 PM EDT MON APR 29 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 29.8 INCH LOW PRESSURE IS CURRENTLY OVER LAKE   
SUPERIOR TONIGHT AND WILL EXIT INTO ONTARIO TUESDAY MORNING.   
DURING TUESDAY AFTERNOON AND EVENING, A WEAK HIGH PRESSURE RIDGE   
OF 29.9 INCHES WILL SHIFT EAST ACROSS LAKE SUPERIOR WHILE A LOW   
PRESSURE TROUGH OF 29.6 INCHES MOVES FROM THE WESTERN PLAINS TO   
MINNESOTA AND IOWA. THIS TROUGH WILL WEAKEN TO 29.7 INCHES AS IT   
SAILS ACROSS LAKE SUPERIOR ON WEDNESDAY. AS A 30.0 INCH RIDGE THEN  
SHIFTS EAST ACROSS THE WESTERN GREAT LAKES DURING WEDNESDAY   
NIGHT, A 29.3 INCH COLORADO LOW WILL LIFT OUT OVER THE PLAINS   
WHILE WEAKENING TO 29.5 INCHES. THIS LOW WILL THEN TRACK TO THE   
UPPER MISSISSIPPI VALLEY ON THURSDAY AND INTO NORTHWESTERN ONTARIO  
ON FRIDAY. AS THE LOW REACHES THE HUDSON BAY SHORES SATURDAY   
AFTERNOON AT 29.6 INCHES, A RIDGE OF 30.1 INCHES BUILDS OVER LAKE   
HURON.  
  
LSZ162-301000-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
947 PM EDT MON APR 29 2024 /847 PM CDT MON APR 29 2024/  
   
REST OF TONIGHT  
NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH  
AFTER MIDNIGHT, THEN BACKING WEST LATE. PATCHY FOG BY LATE  
EVENING. A CHANCE OF RAIN SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY  
TO 10 FEET SUBSIDING TO 2 TO 4 FEET.    
TUESDAY  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO  
25 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHEAST 10 TO 20 KNOTS  
LATE. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT, THEN RAIN  
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.    
WEDNESDAY  
WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY  
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY  
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. A CHANCE OF DRIZZLE THROUGH EARLY  
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO  
8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY NIGHT  
NORTHEAST 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.    
FRIDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF DRIZZLE. A  
CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST. A CHANCE  
OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO  
CALM TO 2 FEET.   
  
  
  
LSZ263-301000-  
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-  
947 PM EDT MON APR 29 2024  
   
REST OF TONIGHT  
EAST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO  
20 KNOTS AFTER MIDNIGHT. PATCHY FOG BY LATE EVENING. AREAS OF FOG  
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES 5 TO 8 FEET   
OCCASIONALLY TO 10 FEET SUBSIDING TO 2 TO 4 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
IN THE AFTERNOON, THEN BACKING SOUTHWEST LATE. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
TUESDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH  
MIDNIGHT, THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO  
2 TO 4 FEET.    
WEDNESDAY  
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS  
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY  
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 2 TO 4 FEET.    
THURSDAY NIGHT  
EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN  
SUBSIDING TO 2 TO 4 FEET.    
FRIDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF DRIZZLE. A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
SATURDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.   
  
  
  
LSZ264-301000-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
947 PM EDT MON APR 29 2024  
   
REST OF TONIGHT  
EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTHWEST LATE. PATCHY FOG  
BY LATE EVENING. AREAS OF FOG AFTER MIDNIGHT. A CHANCE OF RAIN   
SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 3   
TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS LATE. AREAS OF FOG THROUGH EARLY AFTERNOON. A SLIGHT   
CHANCE OF RAIN SHOWERS AND DRIZZLE THROUGH EARLY AFTERNOON. WAVES   
SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING EAST  
5 TO 15 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTHEAST 15 TO  
25 KNOTS LATE. A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES  
BUILDING TO 2 TO 4 FEET.    
WEDNESDAY  
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST BY MID  
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
THURSDAY NIGHT  
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF DRIZZLE. A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
SATURDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES 2 TO 4 FEET.   
  
  
  
LSZ265-301000-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
947 PM EDT MON APR 29 2024  
   
REST OF TONIGHT  
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH  
5 TO 15 KNOTS AFTER MIDNIGHT, THEN BECOMING WEST 10 TO 20 KNOTS  
LATE. AREAS OF FOG. A CHANCE OF RAIN SHOWERS. WAVES 4 TO 7 FEET   
OCCASIONALLY TO 9 FEET SUBSIDING TO 1 TO 3 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. AREAS OF FOG THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF   
DRIZZLE THROUGH EARLY AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET,   
THEN SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO  
15 TO 25 KNOTS. RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES  
BUILDING TO 2 TO 4 FEET.    
WEDNESDAY  
SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES CALM TO 2 FEET.    
THURSDAY NIGHT  
EAST WINDS 15 TO 25 KNOTS. SHOWERS LIKELY AND A  
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF DRIZZLE. A CHANCE OF SHOWERS. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
SATURDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ266-301000-  
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-  
947 PM EDT MON APR 29 2024  
   
REST OF TONIGHT  
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST  
10 TO 20 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTHWEST LATE.  
PATCHY FOG BY LATE EVENING. AREAS OF FOG AFTER MIDNIGHT. A CHANCE  
OF RAIN SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET   
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. PATCHY FOG THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF  
DRIZZLE THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER  
MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. A CHANCE OF  
RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET,  
THEN BUILDING TO 2 TO 4 FEET.    
WEDNESDAY  
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO  
2 TO 4 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
THURSDAY  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY NIGHT  
EAST WINDS 15 TO 25 KNOTS. SHOWERS LIKELY AND A  
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH. A CHANCE  
OF DRIZZLE. A CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
SATURDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO  
3 FEET.   
  
  
  
LSZ267-301000-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
947 PM EDT MON APR 29 2024  
   
REST OF TONIGHT  
SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTH LATE. PATCHY  
FOG BY LATE EVENING. AREAS OF FOG AFTER MIDNIGHT. A CHANCE OF   
RAIN SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. PATCHY FOG THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN  
SHOWERS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET,  
THEN SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST  
AFTER MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. A CHANCE  
OF RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO  
2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
WEDNESDAY  
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST BY  
MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM  
TO 2 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES CALM TO 2 FEET.    
THURSDAY NIGHT  
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST  
20 TO 30 KNOTS AFTER MIDNIGHT. SHOWERS LIKELY AND A CHANCE OF  
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH. A CHANCE  
OF DRIZZLE. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
SATURDAY  
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.   
  
  
LSZ261-301000-  
MAFOR 3003/  
SUPERIOR WEST 11824 11714 11610 11620 11610 11510 11400 11200. A  
CHANCE OF RAIN SHOWERS LATE THIS EVENING. WAVES 4 TO 7 FEET  
SUBSIDING TO 3 TO 5 FEET OVERNIGHT. WAVES 1 TO 4 FEET TUESDAY AND  
TUESDAY EVENING.   
  
SUPERIOR NORTH CENTRAL 11236 11324 11524 11624 11720 11620 11610  
11500. WAVES 5 TO 8 FEET OVERNIGHT. WAVES 3 TO 5 FEET SUBSIDING  
TO 1 TO 4 FEET TUESDAY AND TUESDAY EVENING.   
  
SUPERIOR SOUTH CENTRAL 11314 11414 11620 11630 19634 12620 11800  
11200. A CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 3 TO 6 FEET  
SUBSIDING TO 1 TO 4 FEET OVERNIGHT AND TUESDAY. WAVES 2 FEET OR   
LESS TUESDAY EVENING.   
  
SUPERIOR EAST 11336 11324 11414 11510 12620 11610 11500. WAVES 3  
TO 5 FEET SUBSIDING TO 1 TO 4 FEET OVERNIGHT, TUESDAY, AND   
TUESDAY EVENING.   
  
  
  
GS  
  
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MQT/GLFTABLE  
  
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES