Marine Weather Forecast from Environment Canada

Winds


Issued 10:30 AM EST
05 December 2019

Today Tonight and Friday. Wind north 10 knots becoming light early this evening then increasing to northwest 20 near midnight. Wind increasing to northwest 25 early Friday morning then diminishing to northwest 15 near noon Friday.

Extended Forecast


Issued 03:00 AM EST
05 December 2019
Saturday Wind southwest 15 knots increasing to southwest 20 in the morning.
Sunday Wind southwest 30 knots becoming north 30.
Monday Wind northeast 25 knots.

Waves


Issued 10:30 AM EST
05 December 2019

Today Tonight and Friday. Waves one half metre or less building to one late overnight and to 2 Friday morning. Waves subsiding to one half metre Friday afternoon.

Weather & Visibility


Issued 10:30 AM EST
05 December 2019

Today Tonight and Friday.Flurries. Visibility 1 mile or less in flurries.

Freezing Spray


Issued 10:30 AM EST
05 December 2019

Today Tonight and Friday. Risk of freezing spray Friday morning and afternoon.

Ice Forecast*


Issued 12:00 PM EST
5 December 2019

Today Tonight and Friday Open water except 2 tenths 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



  
104  
FZUS63 KMQT 051452  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
952 AM EST THU DEC 5 2019  
 
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 30.0 INCH RIDGE WILL PUSH ACROSS LAKE SUPERIOR  
TODAY QUICKLY FOLLOWED BY A 29.9 INCH TROUGH THIS EVENING. EARLY  
FRIDAY MORNING, A 30.4 INCH RIDGE OF HIGH PRESSURE WILL BE  
CENTERED OVER THE DAKOTAS. THE HIGH WILL EXTEND A 30.3 INCH RIDGE  
OVER THE UPPER GREAT LAKES AS IT MOVES TO THE EAST AND SOUTHEAST  
ON FRIDAY, REACHING THE OHIO VALLEY BY SATURDAY MORNING. THIS  
RIDGE WILL BE FOLLOWED BY A 29.7 INCH TROUGH ON SUNDAY. AS THIS  
TROUGH SAGS SOUTHWARD ACROSS LAKES MICHIGAN AND HURON MONDAY, A  
NEW AREA OF LOW PRESSURE WILL DEVELOP ALONG THE TROUGH. THIS LOW  
WILL MOVE NORTHEAST INTO SOUTHERN ONTARIO AND QUEBEC TUESDAY AS A  
30.5 INCH HIGH PRESSURE SETTLES IN OVER THE NORTHERN PLAINS.  
 
LSZ162-052300-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
952 AM EST THU DEC 5 2019 /852 AM CST THU DEC 5 2019/  
   
REST OF TODAY
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY  
LATE MORNING, THEN BACKING NORTHEAST BY MID AFTERNOON. A CHANCE  
OF SNOW LATE IN THE MORNING, THEN SNOW LIKELY IN THE AFTERNOON.  
WAVES CALM TO 2 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF  
SNOW IN THE EVENING. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW.  
WAVES BUILDING TO 2 TO 4 FEET.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AFTER MIDNIGHT.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN  
SUBSIDING TO 2 TO 4 FEET.    
SUNDAY
 
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 20 TO  
30 KNOTS. A CHANCE OF SNOW. FREEZING SPRAY. WAVES SUBSIDING TO  
1 TO 3 FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.   
MONDAY
 
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO  
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO  
2 TO 4 FEET.  
 

 
 
LSZ263-052300-  
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-  
952 AM EST THU DEC 5 2019  
   
REST OF TODAY
 
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY  
LATE MORNING, THEN VEERING NORTHEAST BY MID AFTERNOON. A CHANCE  
OF SNOW. WAVES CALM TO 2 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MIDNIGHT. A SLIGHT CHANCE OF SNOW IN THE EVENING.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
FRIDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY LATE MORNING, THEN BACKING WEST BY MID AFTERNOON.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF  
RAIN. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY
 
NORTH WINDS 20 TO 30 KNOTS VEERING NORTHEAST. A CHANCE  
OF RAIN. A CHANCE OF SNOW. FREEZING SPRAY. WAVES SUBSIDING TO  
2 TO 4 FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.   
MONDAY
 
NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH. FREEZING  
SPRAY. A CHANCE OF SNOW. WAVES BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ264-052300-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
952 AM EST THU DEC 5 2019  
   
REST OF TODAY
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST  
LESS THAN 10 KNOTS BY LATE MORNING, THEN BECOMING WEST 5 TO  
15 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. WAVES 1 TO 3 FEET  
SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 20 TO  
30 KNOTS BY MIDNIGHT. A CHANCE OF SNOW. FREEZING SPRAY AFTER  
MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
FRIDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY LATE MORNING, THEN BECOMING WEST 5 TO 15 KNOTS BY MID  
AFTERNOON. FREEZING SPRAY IN THE MORNING. WAVES SUBSIDING TO 1 TO  
3 FEET.    
FRIDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. SNOW LIKELY AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO  
2 TO 4 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF RAIN, POSSIBLY MIXED WITH SNOW. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY
 
NORTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO  
35 KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW. FREEZING SPRAY.  
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN  
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
MONDAY
 
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO  
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. SNOW LIKELY. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ265-052300-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
952 AM EST THU DEC 5 2019  
   
REST OF TODAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST  
BY MID AFTERNOON. FLURRIES LATE IN THE MORNING, THEN SNOW LIKELY  
IN THE AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 15 TO  
25 KNOTS BY MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE.  
SNOW LIKELY IN THE EVENING, THEN ISOLATED SNOW SHOWERS AFTER  
MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
FRIDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. FREEZING SPRAY IN THE MORNING. ISOLATED SNOW SHOWERS IN  
THE MORNING. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO  
10 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
FRIDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN  
SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO  
2 TO 4 FEET.    
SUNDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO  
30 KNOTS. A CHANCE OF RAIN AND SNOW. FREEZING SPRAY. WAVES  
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY
 
NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY. SNOW  
LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ266-052300-  
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-  
952 AM EST THU DEC 5 2019  
   
REST OF TODAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY  
MID AFTERNOON. FLURRIES LATE IN THE MORNING, THEN SNOW LIKELY IN  
THE AFTERNOON. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET SUBSIDING  
TO CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 15 TO  
25 KNOTS BY MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE.  
SNOW LIKELY IN THE EVENING, THEN SCATTERED SNOW SHOWERS AFTER  
MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
FRIDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MID AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS.  
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET, THEN  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
FRIDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO  
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES  
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO  
2 TO 4 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW. WAVES BUILDING TO 5 TO  
8 FEET OCCASIONALLY TO 10 FEET.    
SUNDAY
 
SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH GALES TO  
35 KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW. FREEZING SPRAY.  
WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN  
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
MONDAY
 
NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH. FREEZING  
SPRAY. SNOW LIKELY. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY  
TO 9 FEET.  
 

 
 
LSZ267-052300-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
952 AM EST THU DEC 5 2019  
   
REST OF TODAY
 
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST  
10 TO 20 KNOTS BY LATE MORNING, THEN DIMINISHING TO 5 TO 15 KNOTS  
BY MID AFTERNOON. FLURRIES LATE IN THE MORNING. SNOW LIKELY IN  
THE AFTERNOON. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET SUBSIDING  
TO CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 15 TO  
25 KNOTS BY MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE.  
SNOW. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
FRIDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS INCREASING TO 30 KNOTS  
WITH A FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE BY LATE MORNING,  
THEN DIMINISHING TO 15 TO 25 KNOTS BY MID AFTERNOON. FREEZING  
SPRAY IN THE MORNING. SCATTERED SNOW SHOWERS. WAVES BUILDING TO  
6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
FRIDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO  
3 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW IN  
THE MORNING. WAVES SUBSIDING TO 2 TO 4 FEET.    
SATURDAY NIGHT
 
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 30  
KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 5 TO 8  
FEET OCCASIONALLY TO 10 FEET.    
SUNDAY
 
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH. RAIN  
LIKELY, THEN A CHANCE OF SNOW, POSSIBLY MIXED WITH RAIN. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY
 
NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH. FREEZING  
SPRAY. SNOW LIKELY. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET, THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
LSZ261-052300-  
MAFOR 0516/  
SUPERIOR WEST 12207 11800 11720 13730 11720. WAVES 1 FOOT OR LESS  
THIS AFTERNOON BUILDING TO 2 TO 4 FEET TONIGHT. WAVES SUBSIDING  
TO 1 TO 3 FEET FRIDAY MORNING.  
 
SUPERIOR NORTH CENTRAL 11700 11600 11607 11720 13840 11740. WAVES  
1 TO 2 FEET THIS AFTERNOON BUILDING TO 5 TO 7 FEET TONIGHT. WAVES  
4 TO 7 FEET FRIDAY MORNING.  
 
SUPERIOR SOUTH CENTRAL 11600 12507 11617 11730 13740. WAVES 1 TO  
3 FEET THIS AFTERNOON BUILDING TO 4 TO 7 FEET TONIGHT. WAVES 6 TO  
9 FEET FRIDAY MORNING.  
 
SUPERIOR EAST 11710 11700 11607 11617 11737 13740 19747. WAVES 2  
TO 4 FEET THIS AFTERNOON BUILDING TO 5 TO 8 FEET TONIGHT. WAVES 6  
TO 9 FEET FRIDAY MORNING.  
 

 
 
JP  
 
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

LIGHTNING
The air located around a lightning bolt is heated to around 54,032°F (30,000°C). This is 5 times hotter than the surface of the sun.