Marine Weather Forecast from Environment Canada

Winds


Issued 10:30 AM EST
19 January 2018

Today Tonight and Saturday. Wind southwest 20 knots veering to west 25 near midnight then diminishing to northwest 15 Saturday morning. Wind diminishing to light Saturday afternoon.

Extended Forecast


Issued 03:00 AM EST
19 January 2018
Sunday Wind northeast 15 knots increasing to northeast 25 in the afternoon.
Monday Wind northeast 25 knots increasing to northeast 35 late in the day.
Tuesday Wind northeast 35 knots diminishing to north 25.

Waves


Issued 10:30 AM EST
19 January 2018

Today Tonight and Saturday. Waves one half metre building to one near noon and to 2 late overnight. Waves subsiding to one near noon Saturday and to less than one half metre Saturday evening.

Weather & Visibility


Issued 10:30 AM EST
19 January 2018

Today Tonight and Saturday.Chance of flurries changing to a few showers near noon and ending near midnight.

Ice Forecast*


Issued 12:00 PM EST
19 January 2018

Today Tonight and Saturday Open water except 8 tenths thin lake ice including 3 tenths medium lake ice along the southern and eastern shores.

*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



  
471  
FZUS63 KMQT 192055  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
355 PM EST FRI JAN 19 2018  
 
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 29.3 INCH LOW PRESSURE SYSTEM ACROSS WESTERN ONTARIO  
THIS AFTERNOON WILL TRACK EASTWARD TO CENTRAL QUEBEC BY MIDDAY  
SATURDAY. EARLY SUNDAY MORNING, A 29.6 INCH LOW OVER THE COLORADO  
ROCKIES WILL EJECT INTO THE CENTRAL PLAINS AND DEEPEN TO 29.4 INCHES  
AS IT MOVES ACROSS THE WESTERN GREAT LAKES LATE MONDAY. THE LOW WILL  
REACH QUEBEC LATE ON TUESDAY WITH HIGH PRESSURE AVERAGING 30.3  
INCHES STRETCHING FROM TEXAS AND THE LOWER MISSISSIPPI VALLEY UP  
THROUGH MANITOBA AND ONTARIO THROUGH WEDNESDAY.  
 
LSZ162-200500-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
355 PM EST FRI JAN 19 2018 /255 PM CST FRI JAN 19 2018/  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS  
THAN 10 KNOTS BY MIDNIGHT, THEN VEERING NORTH LATE. WAVES CALM TO  
2 FEET.    
SUNDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO  
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN IN THE EVENING. A  
CHANCE OF SNOW. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
MONDAY
 
NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY IN THE  
MORNING. SNOW. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO  
14 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER  
MIDNIGHT. FREEZING SPRAY. SNOW LIKELY IN THE EVENING. A CHANCE OF  
SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY  
TO 9 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. SCATTERED  
SNOW SHOWERS. WAVES CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ263-200500-  
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-  
355 PM EST FRI JAN 19 2018  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS LATE. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7  
FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SATURDAY
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO  
LESS THAN 10 KNOTS BY MIDNIGHT, THEN VEERING NORTH LATE. WAVES  
CALM TO 2 FEET.    
SUNDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO  
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW, POSSIBLY MIXED  
WITH FREEZING RAIN. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
MONDAY
 
NORTHEAST GALES TO 40 KNOTS. FREEZING SPRAY. SNOW.  
WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 40 KNOTS BECOMING NORTH GALES  
TO 35 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. SNOW LIKELY. WAVES  
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. SCATTERED  
SNOW SHOWERS. WAVES CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ264-200500-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
355 PM EST FRI JAN 19 2018  
   
LATE THIS AFTERNOON
 
WEST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6  
FEET OCCASIONALLY TO 8 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 4 TO 7  
FEET OCCASIONALLY TO 9 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS BY LATE MORNING, THEN BACKING WEST BY MID AFTERNOON.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST  
LESS THAN 10 KNOTS BY MIDNIGHT, THEN BECOMING WEST 5 TO 15 KNOTS  
LATE. A SLIGHT CHANCE OF RAIN. A SLIGHT CHANCE OF FREEZING RAIN  
AND SNOW AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN. A  
SLIGHT CHANCE OF SNOW IN THE AFTERNOON. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST  
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW, POSSIBLY MIXED  
WITH FREEZING RAIN. FREEZING SPRAY AFTER MIDNIGHT. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY
 
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST GALES TO  
35 KNOTS IN THE AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW IN  
THE MORNING. SNOW IN THE AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER  
MIDNIGHT. FREEZING SPRAY. SNOW. WAVES BUILDING TO 6 TO 10 FEET  
OCCASIONALLY TO 13 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. HEAVY FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES  
SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. SCATTERED  
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ265-200500-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
355 PM EST FRI JAN 19 2018  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
BY MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET, THEN  
SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST  
LATE. WAVES CALM TO 2 FEET.    
SUNDAY
 
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS  
IN THE AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY
 
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
35 KNOTS IN THE AFTERNOON. SNOW. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS BACKING NORTH AFTER  
MIDNIGHT. SNOW. FREEZING SPRAY AFTER MIDNIGHT. WAVES BUILDING TO  
8 TO 11 FEET OCCASIONALLY TO 14 FEET, THEN SUBSIDING TO 6 TO  
9 FEET OCCASIONALLY TO 11 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO  
25 KNOTS. HEAVY FREEZING SPRAY. SNOW SHOWERS, THEN SCATTERED SNOW  
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST.  
SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ266-200500-  
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-  
355 PM EST FRI JAN 19 2018  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT
 
SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST BY  
MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE. SPRINKLES, A  
SLIGHT CHANCE OF DRIZZLE AND FLURRIES IN THE EVENING. WAVES  
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN BUILDING TO  
6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
SATURDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO 2 TO 4 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY  
MIDNIGHT. A SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS  
IN THE AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN IN THE  
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW,  
POSSIBLY MIXED WITH FREEZING RAIN. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
MONDAY
 
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
40 KNOTS IN THE AFTERNOON. FREEZING SPRAY. SNOW. WAVES BUILDING  
TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.    
MONDAY NIGHT
 
NORTHEAST GALES TO 35 KNOTS. FREEZING SPRAY.  
SNOW. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET,  
THEN SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
TUESDAY
 
NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS.  
FREEZING SPRAY. SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.  
WAVES SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ267-200500-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
355 PM EST FRI JAN 19 2018  
   
LATE THIS AFTERNOON
 
SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS BY MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET, THEN  
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
SATURDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES SUBSIDING TO 2 TO 4 FEET.    
SATURDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST  
10 TO 20 KNOTS BY MIDNIGHT, THEN BECOMING SOUTH 5 TO 15 KNOTS  
LATE. A SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO  
20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY
 
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
35 KNOTS IN THE AFTERNOON. FREEZING SPRAY IN THE MORNING. PATCHY  
BLOWING SNOW. SNOW. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO  
10 FEET.    
MONDAY NIGHT
 
EAST GALES TO 35 KNOTS BACKING NORTHEAST AFTER  
MIDNIGHT. PATCHY BLOWING SNOW IN THE EVENING. FREEZING SPRAY.  
SNOW. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN  
SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. PATCHY BLOWING SNOW. FREEZING SPRAY. NUMEROUS SNOW  
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET,  
THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.  
WAVES SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ261-200500-  
MAFOR 1922/  
SUPERIOR WEST 11530 13630 13620 11520. WAVES 3 TO 5 FEET TONIGHT.  
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET SATURDAY.  
 
SUPERIOR NORTH CENTRAL 11530 12640 11630 11730 11720 11710 11610.  
WAVES 3 TO 6 FEET BUILDING TO 4 TO 7 FEET TONIGHT. WAVES 3 TO 6  
FEET SUBSIDING TO 1 TO 3 FEET SATURDAY.  
 
SUPERIOR SOUTH CENTRAL 11520 11530 11630 11640 11630 12720 11710.  
WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET TONIGHT. WAVES 3 TO 5  
FEET SUBSIDING TO 1 TO 3 FEET SATURDAY.  
 
SUPERIOR EAST 12530 11630 11640 11740 11730 11720 11710. WAVES 3  
TO 6 FEET BUILDING TO 5 TO 9 FEET TONIGHT. WAVES 6 TO 9 FEET  
SUBSIDING TO 3 TO 5 FEET SATURDAY.  
 

 
 
JLA  
 
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

RIDGE
A ridge is an elongated area of relatively high pressure extending from the center of a high pressure region; the opposite of a trough.