Marine Weather Forecast from Environment Canada

Winds


Issued 10:30 AM EDT 29 April 2017

Today Tonight and Sunday Wind north 15 knots veering to northeast 15 early this evening then increasing to northeast 20 near midnight. Wind diminishing to northeast 15 near noon Sunday.

Extended Forecast


Issued 03:00 AM EDT 29 April 2017
Monday Wind northeast 15 knots increasing to northeast 25 in the morning.
Tuesday Wind northeast 25 knots diminishing to northwest 15 late in the day.
Wednesday Wind light.

Waves


Issued 10:30 AM EDT 29 April 2017

Today Tonight and Sunday Waves one metre.

 

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



  
483  
FZUS63 KMQT 291403  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
1003 AM EDT SAT APR 29 2017  
 
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR  
 
WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH  
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE  
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL  
OCCASIONALLY BE ENCOUNTERED.  
   
SYNOPSIS
 
A 30.4 INCH RIDGE WILL BUILD OVER THE UPPER GREAT  
LAKES TODAY. THIS RIDGE WILL MOVE OVER EASTERN ONTARIO AND WESTERN  
QUEBEC ON SUNDAY AND STRENGTHEN TO 30.5 INCHES...WHILE A 29.4  
INCH LOW DEVELOPS IN THE CENTRAL PLAINS. ON MONDAY...THIS LOW  
WILL DEEPEN TO 29.2 INCHES AS IT LIFTS NORTHEAST ACROSS WISCONSIN  
AND UP INTO CENTRAL PORTIONS OF UPPER MICHIGAN. THE LOW WILL  
WEAKEN TO AROUND 29.4 INCHES AS IT LIFTS NORTHEAST INTO QUEBEC ON  
TUESDAY...LEAVING A TROUGH OF 29.9 INCHES DRAPED ACROSS THE UPPER  
GREAT LAKES. THE PRESSURE GRADIENT WILL THEN RELAX ACROSS THE  
UPPER GREAT LAKES AS A WEAK HIGH PRESSURE OF 30.1 INCHES LINGERS  
WEDNESDAY AND THURSDAY...WHILE A LOW OF 29.6 INCHES LIFTS ACROSS  
THE OHIO RIVER VALLEY.  
 
LSZ162-292215-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
1003 AM EDT SAT APR 29 2017 /903 AM CDT SAT APR 29 2017/  
 
...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
EVENING...  
   
REST OF TODAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
TONIGHT
 
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID  
AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO  
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS  
THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. RAIN SHOWERS LIKELY  
AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET...THEN BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN SHOWERS
 
POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 8 TO 11 FEET  
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS
 
 
POSSIBLY MIXED WITH SNOW SHOWERS THROUGH MIDNIGHT...THEN A CHANCE  
OF RAIN AND SNOW SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO  
15 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ263-292215-  
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-  
1003 AM EDT SAT APR 29 2017  
 
...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
EVENING...  
   
REST OF TODAY
 
NORTH WINDS LESS THAN 10 KNOTS INCREASING TO  
5 TO 15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
SUNDAY
 
NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF RAIN  
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO  
GALES TO 40 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...  
POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN SHOWERS  
AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET...THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN SHOWERS
 
POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 8 TO 11 FEET  
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY NIGHT
 
NORTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS AND SNOW  
SHOWERS LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
WEDNESDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ264-292215-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
1003 AM EDT SAT APR 29 2017  
 
...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
EVENING...  
   
REST OF TODAY
 
NORTH WINDS 5 TO 15 KNOTS. WAVES 1 TO 3 FEET  
SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO  
3 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST  
GALES TO 35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS  
THROUGH MIDNIGHT...THEN RAIN SHOWERS...POSSIBLY MIXED WITH SNOW  
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.    
MONDAY...NORTHEAST GALES TO 35 KNOTS. RAIN SHOWERS
 
POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 6 TO 10 FEET  
OCCASIONALLY TO 13 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 20 TO  
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS THROUGH  
MIDNIGHT. RAIN SHOWERS. SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
WEDNESDAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ265-292215-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
1003 AM EDT SAT APR 29 2017  
   
REST OF TODAY
 
NORTH WINDS 5 TO 15 KNOTS. WAVES 1 TO 3 FEET  
SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.  
WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...POSSIBLY  
MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN SHOWERS AFTER  
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 4 TO  
7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY
 
EAST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS BY  
MID AFTERNOON. RAIN SHOWERS. WAVES BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH  
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY...POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET...THEN  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
WEDNESDAY
 
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ266-292215-  
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-  
1003 AM EDT SAT APR 29 2017  
   
REST OF TODAY
 
NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET  
SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO  
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID  
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO  
3 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST  
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...  
POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN SHOWERS  
AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
MONDAY
 
EAST GALES TO 35 KNOTS. RAIN SHOWERS. WAVES BUILDING TO  
6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 4 TO  
7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY NIGHT
 
EAST WINDS 20 TO 30 KNOTS BACKING NORTH AFTER  
MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS  
AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO  
7 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...THEN  
SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ267-292215-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
1003 AM EDT SAT APR 29 2017  
   
REST OF TODAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY  
MID AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH  
MIDNIGHT...THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY
 
EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO  
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS. WAVES BUILDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET...THEN SUBSIDING TO 1 TO 3 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH  
MIDNIGHT...THEN RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH SNOW  
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS.  
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ261-292215-  
MAFOR 2915/  
SUPERIOR WEST 11800 11100 11200 11210 12110 12120. WAVES 2 TO 4  
FEET.  
 
SUPERIOR NORTH CENTRAL 11810 12700 11800 11110 11210 12220. WAVES  
1 TO 4 FEET.  
 
SUPERIOR SOUTH CENTRAL 14810 11110 11120 12220. WAVES 1 TO 4 FEET.  
 
SUPERIOR EAST 11810 12710 11810 11120 13220. WAVES 2 TO 3 FEET.  
 

 
 
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

WEATHER STATION
A weather station is a facility with instruments and equipment to make weather observations by monitoring atmospheric conditions to study the weather. This weather station has a thermometer for measuring temperature; barometer for measuring changes in air pressure; hygrometer for measuring humidity; anemometer for measuring wind speed and wind direction; and rain gauge for measuring precipitation.