Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EDT 21 October 2018

Tonight and Monday. Wind southwest 15 knots diminishing to southwest 10 late overnight then increasing to west 15 near noon Monday.

Extended Forecast


Issued 06:30 PM EDT 21 October 2018
Tuesday Wind northwest 20 knots.
Wednesday Wind light.
Thursday Wind light becoming southwest 15 knots.

Waves


Issued 06:30 PM EDT 21 October 2018

Tonight and Monday. Waves one metre.

Weather & Visibility


Issued 06:30 PM EDT 21 October 2018

Tonight and Monday.Showers or flurries ending this evening.

Ice Forecast*


Issued 12:00 PM EDT 6 July 2018

Tonight and Monday At 6:30 p.m. EDT tonight ridge located on a line north-south over
Georgian Bay.
By 6:30 p.m. EDT Monday ridge located on a line north-south over
Vermont.

At 6:30 p.m. EDT tonight trough from low located on a line
north-south over the Ontario - Manitoba border.
By 6:30 p.m. EDT Monday trough from low located on a line
north-south over Sault Ste. Marie.

Great Lakes - Lake Superior Area

Another Region

 

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



  
107  
FZUS63 KMQT 220148  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
948 PM EDT SUN OCT 21 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
 
A 30.3 INCH HIGH PRESSURE IS OVER THE OHIO RIVER  
VALLEY TONIGHT AND WILL MAKE ITS WAY INTO THE CAROLINAS BY MIDDAY  
TOMORROW. LOOK FOR A 29.9 INCH TROUGH TO MOVE INTO LAKE SUPERIOR  
BY MONDAY MORNING AND REMAIN INTO THROUGH THE NIGHT. THIS TROUGH  
WILL MOVE TO THE LOWER GREAT LAKES ON TUESDAY WITH A 30.5 INCH  
HIGH PRESSURE MOVING INTO THE NORTHERN PLAINS. THIS HIGH MOVES  
INTO THE UPPER GREAT LAKES ON WEDNESDAY AND WEAKENS TO 30.4  
INCHES. THE HIGH WILL REMAIN OVER THE UPPER GREAT LAKES INTO  
THURSDAY AND WEAKEN FURTHER TO 30.2 INCHES. LOOK FOR A 29.6 INCH  
TROUGH TO MOVE INTO LAKE SUPERIOR ON FRIDAY INTO THE WEEKEND.  
 
LSZ162-221000-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
948 PM EDT SUN OCT 21 2018 /848 PM CDT SUN OCT 21 2018/  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS. WAVES 1 TO 3 FEET.   
MONDAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
IN THE AFTERNOON, THEN VEERING NORTHWEST LATE. A SLIGHT CHANCE OF  
RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS LATE. WAVES 2 TO 4 FEET.    
TUESDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST  
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
EAST WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST BY  
MID AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ263-221000-  
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-  
948 PM EDT SUN OCT 21 2018  
   
REST OF TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST  
LATE. WAVES 1 TO 4 FEET.   
MONDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST IN THE  
AFTERNOON, THEN BECOMING NORTHWEST 15 TO 25 KNOTS LATE. A SLIGHT  
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH  
LATE. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY
 
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS LESS THAN 10 KNOTS VEERING SOUTH BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ264-221000-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
948 PM EDT SUN OCT 21 2018  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES 1 TO 4 FEET.   
MONDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST IN THE  
AFTERNOON, THEN BECOMING NORTHWEST 15 TO 25 KNOTS LATE. A SLIGHT  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE  
OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF RAIN  
SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ265-221000-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
948 PM EDT SUN OCT 21 2018  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO  
20 KNOTS IN THE AFTERNOON, THEN BECOMING NORTHWEST 15 TO 25 KNOTS  
LATE. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES  
BUILDING TO 2 TO 4 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE  
OF RAIN SHOWERS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
TUESDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF  
RAIN SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO  
7 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO  
1 TO 3 FEET.    
WEDNESDAY
 
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM  
TO 2 FEET.    
WEDNESDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO  
20 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ266-221000-  
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-  
948 PM EDT SUN OCT 21 2018  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES 1 TO 4 FEET.   
MONDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST LATE.  
A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING  
TO 2 TO 4 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE  
OF RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO  
10 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ267-221000-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
948 PM EDT SUN OCT 21 2018  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST  
LATE. WAVES 1 TO 3 FEET.   
MONDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST LATE. WAVES  
1 TO 3 FEET.    
MONDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO  
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS.  
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
TUESDAY
 
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO  
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS  
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES  
BUILDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
LSZ261-221000-  
MAFOR 2203/  
SUPERIOR WEST 12610 11520 12620 13730. WAVES 1 TO 3 FEET  
OVERNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET MONDAY.  
WAVES 3 TO 5 FEET MONDAY EVENING.  
 
SUPERIOR NORTH CENTRAL 12610 11510 11520 11620 11630 11720 11730.  
WAVES 2 TO 4 FEET OVERNIGHT AND MONDAY. WAVES 3 TO 5 FEET MONDAY  
EVENING.  
 
SUPERIOR SOUTH CENTRAL 11510 12610 11510 11520 11620 12730. WAVES  
1 TO 2 FEET OVERNIGHT. WAVES 2 TO 4 FEET MONDAY. WAVES 3 TO 5  
FEET MONDAY EVENING.  
 
SUPERIOR EAST 11520 11610 11600 13510 11620 11730. WAVES 1 TO 3  
FEET OVERNIGHT AND MONDAY. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5  
FEET MONDAY EVENING.  
 

 
 
JAW  
 
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

KILOPASCAL
The internationally recognized unit used by the Meteorological Service of Canada for measuring atmospheric pressure is the kilopascal.