Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EDT 03 April 2020

Tonight and Saturday. Wind variable 10 knots increasing to northwest 20 early Saturday morning then diminishing to northwest 15 Saturday evening.

Extended Forecast


Issued 07:08 PM EDT 03 April 2020
Sunday Wind light.
Monday Wind light becoming southeast 15 knots.
Tuesday Wind light becoming east 15 knots.

Waves


Issued 06:30 PM EDT 03 April 2020

Tonight and Saturday. Waves one metre subsiding to one half metre this evening then building to one and one half metres Saturday morning.

Weather & Visibility


Issued 06:30 PM EDT 03 April 2020

Tonight and Saturday.Rain beginning overnight becoming snow or rain Saturday morning and ending Saturday afternoon.

Ice Forecast*


Issued 12:00 PM EDT 3 April 2020

Today Tonight and Saturday Open water except 2 tenths thick lake ice near Whitefish Bay.

*Ice Forecast and Warnings also apply to U.S. waters

 

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



  
632  
FZUS63 KMQT 040209  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
1009 PM EDT FRI APR 3 2020  
 
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 LOW PRESSURE TROUGH OF 29.9 INCHES EXTENDING FROM  
NORTHERN MANITOBA ACROSS LAKE SUPERIOR AND INTO SOUTHERN LAKE  
MICHIGAN WILL ALSO MOVE EAST, CROSSING LAKE SUPERIOR TONIGHT. IN  
ITS WAKE, HIGH PRESSURE OF 30.4 INCHES BUILDING INTO THE DAKOTAS  
AND MINNESOTA OVERNIGHT WILL DRIFT EAST, SETTLING OVER THE UPPER  
GREAT LAKES SATURDAY NIGHT AND THE LOWER GREAT LAKES MONDAY  
MORNING. MONDAY INTO TUESDAY, A 30.2 INCH HIGH PRESSURE RIDGE WILL  
BUILD SOUTH INTO NORTHERN ONTARIO WHILE 29.7 INCH LOW PRESSURE  
EMERGES FROM THE NORTHERN ROCKIES AND TRACKS TOWARD THE UPPER  
MISSISSIPPI VALLEY.  
 
LSZ162-041015-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
1009 PM EDT FRI APR 3 2020 /909 PM CDT FRI APR 3 2020/  
   
REST OF TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO  
15 TO 25 KNOTS AFTER MIDNIGHT, THEN DIMINISHING TO 10 TO 20 KNOTS  
LATE. SNOW BY LATE EVENING. WAVES 2 TO 4 FEET.    
SATURDAY
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS LATE. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS VEERING NORTH LATE.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. RAIN  
SHOWERS LIKELY, THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO  
1 TO 3 FEET.    
WEDNESDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ263-041015-  
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-  
1009 PM EDT FRI APR 3 2020  
   
REST OF TONIGHT
 
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE. RAIN BY  
LATE EVENING. SNOW. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET  
SUBSIDING TO 2 TO 4 FEET.    
SATURDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST IN THE  
AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. WAVES  
SUBSIDING TO 2 TO 4 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN  
SHOWERS. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY, THEN A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET, THEN  
SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.  
 

 
 
LSZ264-041015-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
1009 PM EDT FRI APR 3 2020  
   
REST OF TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO  
20 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHWEST 15 TO 25 KNOTS  
LATE. RAIN. SNOW AFTER MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO  
20 KNOTS LATE. WAVES SUBSIDING TO 2 TO 4 FEET.    
SATURDAY NIGHT
 
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS LESS THAN 10 KNOTS BECOMING SOUTHEAST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHEAST WINDS LESS THAN 10 KNOTS BACKING EAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY  
TO 8 FEET, THEN SUBSIDING TO 2 TO 4 FEET.  
 

 
 
LSZ265-041015-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
1009 PM EDT FRI APR 3 2020  
   
REST OF TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO  
20 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHWEST 15 TO 25 KNOTS  
LATE. A CHANCE OF RAIN BY LATE EVENING, THEN SNOW, POSSIBLY MIXED  
WITH RAIN AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS LATE. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.   
SATURDAY NIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHWEST 5 TO 15 KNOTS  
LATE. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.   
MONDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. RAIN  
SHOWERS LIKELY, THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO  
1 TO 3 FEET.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ266-041015-  
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-  
1009 PM EDT FRI APR 3 2020  
   
REST OF TONIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH  
10 TO 20 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHWEST 15 TO  
25 KNOTS LATE. A CHANCE OF RAIN BY LATE EVENING, THEN RAIN,  
POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES 1 TO 3 FEET  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW  
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
SATURDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO 1 TO 3 FEET.    
SUNDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.   
MONDAY
 
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS. A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY  
TO 8 FEET.  
 

 
 
LSZ267-041015-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
1009 PM EDT FRI APR 3 2020  
   
REST OF TONIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS AFTER MIDNIGHT, THEN VEERING WEST LATE. A CHANCE OF  
RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO  
3 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS IN THE AFTERNOON. SNOW, POSSIBLY MIXED WITH RAIN THROUGH  
EARLY AFTERNOON, THEN A SLIGHT CHANCE OF SNOW BY MID AFTERNOON.  
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SATURDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
SUNDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST BY MID  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. A CHANCE  
OF RAIN SHOWERS, POSSIBLY MIXED WITH SNOW, THEN RAIN SHOWERS  
LIKELY. WAVES BUILDING TO 2 TO 4 FEET.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
LSZ261-041015-  
MAFOR 0403/  
SUPERIOR WEST 11737 12730 11720 13620 11610. WAVES 1 TO 4 FEET  
OVERNIGHT THROUGH SATURDAY EVENING.  
 
SUPERIOR NORTH CENTRAL 11526 11627 11737 13730 11630 11620. A  
CHANCE OF FREEZING RAIN OVERNIGHT. WAVES 2 TO 6 FEET OVERNIGHT  
THROUGH SATURDAY EVENING.  
 
SUPERIOR SOUTH CENTRAL 11510 11627 11737 14730 11720. A CHANCE OF  
FREEZING RAIN OVERNIGHT. WAVES 2 TO 6 FEET OVERNIGHT THROUGH  
SATURDAY EVENING.  
 
SUPERIOR EAST 11310 11410 11626 11737 13730 11720. WAVES 1 TO 6  
FEET BUILDING TO 4 TO 7 FEET SATURDAY AND SATURDAY EVENING.  
 

 
 
JSS  
 
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

EYE
The roughly circular area of comparatively light winds and fair weather found at the center of a hurricane is usually referred to as the eye of the storm.