Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EST
14 December 2018

Tonight and Saturday. Wind west 25 knots veering to northwest 20 this evening then diminishing to northwest 10 late overnight. Wind increasing to south 15 Saturday morning and to south 20 Saturday afternoon.

Extended Forecast


Issued 06:30 PM EST
14 December 2018
Sunday Wind south 25 knots veering to southwest 30 in the morning then to northwest 30 late in the day.
Monday Wind northwest 30 knots diminishing to north 15 late in the day.
Tuesday Wind light increasing to southwest 30 knots late in the day.

Waves


Issued 06:30 PM EST
14 December 2018

Tonight and Saturday. Waves 2 to 3 metres subsiding to one near midnight and to one half metre early Saturday morning. Waves building to one Saturday evening.

Ice Forecast*


Issued 12:00 PM EST
14 December 2018

Today Tonight and Saturday Ice free except 1 tenth new lake ice along parts of the shore.

*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



  
368  
FZUS63 KMQT 150244  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
944 PM EST FRI DEC 14 2018  
 
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
 
HIGH PRESSURE RIDGING OF 30.2 INCHES WILL BUILD INTO  
THE UPPER GREAT LAKES TONIGHT THROUGH SATURDAY, BRIEFLY REACHING  
30.3 INCHES OVER THE FAR EASTERN REACHES OF THE LAKE SATURDAY  
AFTERNOON. A LOW PRESSURE TROUGH OF 29.9 INCHES WILL SWING ACROSS  
LAKE SUPERIOR SUNDAY BEFORE HIGH PRESSURE RIDGING OF 30.3 INCHES  
BUILDS BACK INTO THE GREAT LAKES MONDAY AFTERNOON THROUGH  
TUESDAY, FOLLOWED BY A 29.8 INCH TROUGH TUESDAY NIGHT. A 29.6  
INCH LOW WILL THEN APPROACH THE UPPER GREAT LAKES FROM THE  
NORTHWEST LATE ON WEDNESDAY.  
 
LSZ162-151045-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
944 PM EST FRI DEC 14 2018 /844 PM CST FRI DEC 14 2018/  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY  
MIDNIGHT. WAVES 2 TO 4 FEET SUBSIDING TO CALM TO 2 FEET.    
SATURDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST  
20 TO 30 KNOTS BY MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
SUNDAY
 
WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING  
TO 2 TO 4 FEET.    
MONDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY NIGHT
 
WEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO  
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO  
1 TO 3 FEET, THEN BUILDING TO 2 TO 4 FEET.  
 

 
 
LSZ263-151045-  
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-  
944 PM EST FRI DEC 14 2018  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST  
LATE. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET SUBSIDING TO 1 TO  
3 FEET.    
SATURDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO  
CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MIDNIGHT, THEN VEERING SOUTHWEST LATE. WAVES BUILDING  
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SUNDAY
 
WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS  
IN THE AFTERNOON. WAVES BUILDING TO 4 TO 8 FEET OCCASIONALLY TO  
10 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
MONDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND  
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.  
 

 
 
LSZ264-151045-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
944 PM EST FRI DEC 14 2018  
   
REST OF TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MIDNIGHT, THEN BECOMING SOUTHWEST 5 TO 15 KNOTS LATE.  
WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 1 TO  
3 FEET.    
SATURDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO  
1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MIDNIGHT, THEN VEERING SOUTHWEST LATE. WAVES BUILDING  
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SUNDAY
 
WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
35 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
SUNDAY NIGHT
 
NORTHWEST GALES TO 35 KNOTS. WAVES 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND  
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO  
2 TO 4 FEET.  
 

 
 
LSZ265-151045-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
944 PM EST FRI DEC 14 2018  
   
REST OF TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO CALM TO 2 FEET.    
SATURDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.    
SUNDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
SUNDAY NIGHT
 
NORTHWEST GALES TO 35 KNOTS. WAVES BUILDING TO  
4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST. WAVES  
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN  
SHOWERS. SNOW SHOWERS LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ266-151045-  
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-  
944 PM EST FRI DEC 14 2018  
   
REST OF TONIGHT
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS LATE. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET  
SUBSIDING TO 2 TO 4 FEET.    
SATURDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO  
1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY  
TO 9 FEET.    
SUNDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS INCREASING TO  
GALES TO 35 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 8 TO 11 FEET  
OCCASIONALLY TO 14 FEET.    
MONDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE  
MORNING. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST. WAVES  
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND  
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.  
 

 
 
LSZ267-151045-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
944 PM EST FRI DEC 14 2018  
   
REST OF TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO  
2 TO 4 FEET.    
SATURDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY LATE  
MORNING, THEN INCREASING TO 10 TO 20 KNOTS BY MID AFTERNOON.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST IN THE  
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET,  
THEN SUBSIDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS INCREASING TO  
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS,  
POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 8 TO 11 FEET  
OCCASIONALLY TO 14 FEET.    
MONDAY
 
NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO  
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE  
MORNING. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 20 TO  
30 KNOTS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO  
1 TO 3 FEET.  
 

 
LSZ261-151045-  
MAFOR 1504/  
SUPERIOR WEST 15510 11410 11440. WAVES 1 TO 3 FEET.  
 
SUPERIOR NORTH CENTRAL 11710 11600 11500 14410 11430. WAVES 2 TO  
5 FEET OVERNIGHT. WAVES 1 TO 4 FEET SATURDAY AND SATURDAY EVENING.  
 
SUPERIOR SOUTH CENTRAL 11620 11610 11500 11400 12410 11420 11430.  
WAVES 1 TO 4 FEET.  
 
SUPERIOR EAST 11720 11710 11700 11500 12410 11420 11430. WAVES 4  
TO 7 FEET SUBSIDING TO 3 TO 5 FEET OVERNIGHT. WAVES 2 TO 4 FEET  
SATURDAY AND SATURDAY EVENING.  
 

 
 
KCW  
 
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

SNOW
Snowflakes generally fall from the sky at speeds between one and five miles per hour.