Marine Weather Forecast from Environment Canada

Winds


Issued 03:00 AM EST
23 February 2019

Today Tonight and Sunday. Storm warning in effect. Wind light increasing to southeast 15 knots this morning then backing to east 20 near midnight. Wind increasing to northeast 30 Sunday morning and to northwest 40 near noon Sunday. Wind increasing to northwest 50 Sunday evening.

Extended Forecast


Issued 03:00 AM EST
23 February 2019
Monday Wind northwest 40 knots diminishing to northwest 20 late in the day.
Tuesday Wind northwest 20 knots diminishing to light late in the day.
Wednesday Wind light becoming northwest 15 knots.

Waves


Issued 03:00 AM EST
23 February 2019

Today Tonight and Sunday. Over open water waves one half metre or less building to one Sunday afternoon.

Weather & Visibility


Issued 03:00 AM EST
23 February 2019

Today Tonight and Sunday.Snow beginning early this morning changing to snow or freezing rain near midnight then to snow Sunday morning. Visibility 1 mile or less in precipitation.

Ice Forecast*


Issued 12:00 PM EST
22 February 2019

Today Tonight and Saturday 7 tenths thin lake ice including 3 tenths medium lake ice. Consolidated medium lake ice in some bays along the north shore and parts of the southern 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



  
347  
FZUS63 KMQT 230923  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
423 AM EST SAT FEB 23 2019  
 
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 OF 30.5 INCHES CENTERED OVER SOUTHERN  
ONTARIO WILL MOVE EAST AND OFF THE NEW ENGLAND COAST BY THIS  
EVENING. MEANWHILE, LOW PRESSURE OF 29.4 INCHES ORGANIZING OVER  
THE SOUTHERN PLAINS THIS MORNING WILL STRENGTHEN TO 28.9 INCHES AS  
IT TRACKS NORTHEAST, REACHING EASTERN UPPER MICHIGAN SUNDAY  
MORNING. THE LOW WILL DEEPEN FURTHER TO 28.7 INCHES AT IT MOVES  
INTO QUEBEC SUNDAY EVENING. IN ITS WAKE, HIGH PRESSURE OF 30.8  
INCHES BUILDING INTO THE DAKOTAS SUNDAY NIGHT WILL REACH THE  
WESTERN GREAT LAKES ON TUESDAY. AS THE HIGH SHIFTS EAST ON  
WEDNESDAY, A 30.4 INCH LOW PRESSURE TROUGH WILL SWING ACROSS THE  
WESTERN GREAT LAKES.  
 
LSZ162-231730-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
423 AM EST SAT FEB 23 2019 /323 AM CST SAT FEB 23 2019/  
 
...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY  
NIGHT...  
   
EARLY THIS MORNING
 
EAST WINDS 5 TO 15 KNOTS. SNOW LIKELY.    
TODAY
 
EAST WINDS 5 TO 15 KNOTS. SNOW IN THE MORNING. A CHANCE  
OF FREEZING RAIN. A CHANCE OF SNOW IN THE AFTERNOON.    
TONIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY  
MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE. A CHANCE OF  
RAIN, POSSIBLY MIXED WITH FREEZING RAIN AND SNOW IN THE EVENING,  
THEN SNOW LIKELY AFTER MIDNIGHT.    
SUNDAY
 
NORTHWEST GALES TO 45 KNOTS. AREAS OF BLOWING SNOW. A  
CHANCE OF SNOW.    
SUNDAY NIGHT
 
NORTHWEST GALES TO 40 KNOTS BECOMING WEST 20 TO  
30 KNOTS AFTER MIDNIGHT. PATCHY BLOWING SNOW. SCATTERED SNOW  
SHOWERS.    
MONDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS  
IN THE AFTERNOON.    
MONDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS.    
TUESDAY
 
WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW SHOWERS.    
WEDNESDAY
 
WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.  
 
NOTE, WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.  
 

 
 
LSZ263-231730-  
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-  
423 AM EST SAT FEB 23 2019  
 
...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY  
NIGHT...  
   
EARLY THIS MORNING
 
EAST WINDS LESS THAN 10 KNOTS. A CHANCE OF  
SNOW.    
TODAY
 
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY LATE  
MORNING, THEN BACKING EAST BY MID AFTERNOON. SNOW IN THE MORNING,  
THEN A CHANCE OF FREEZING RAIN AND SNOW, POSSIBLY MIXED WITH RAIN  
IN THE AFTERNOON.    
TONIGHT
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY  
MIDNIGHT, THEN BECOMING NORTH 15 TO 25 KNOTS LATE. A SLIGHT  
CHANCE OF RAIN AND SNOW IN THE EVENING. A CHANCE OF FREEZING  
RAIN. SNOW AFTER MIDNIGHT.    
SUNDAY
 
NORTHWEST GALES TO 45 KNOTS. BLOWING SNOW. SNOW IN THE  
MORNING. A CHANCE OF SNOW IN THE AFTERNOON. VISIBILITY ONE  
QUARTER MILE OR LESS AT TIMES.    
SUNDAY NIGHT
 
NORTHWEST GALES TO 45 KNOTS DIMINISHING TO 20 TO  
30 KNOTS AFTER MIDNIGHT. AREAS OF BLOWING SNOW. SCATTERED SNOW  
SHOWERS. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES IN THE  
EVENING.    
MONDAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS  
IN THE AFTERNOON.    
MONDAY NIGHT
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT.    
TUESDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. A CHANCE  
OF SNOW SHOWERS.    
WEDNESDAY
 
WEST WINDS 10 TO 20 KNOTS. PATCHY BLOWING SNOW. A  
CHANCE OF SNOW SHOWERS.  
 
NOTE, WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.  
 

 
 
LSZ264-231730-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
423 AM EST SAT FEB 23 2019  
 
...STORM WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY  
EVENING...  
   
EARLY THIS MORNING
 
SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT  
CHANCE OF SNOW.    
TODAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO  
25 KNOTS. SNOW. A CHANCE OF FREEZING RAIN IN THE AFTERNOON.    
TONIGHT
 
EAST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO  
30 KNOTS LATE. A SLIGHT CHANCE OF RAIN AND SNOW IN THE EVENING. A  
CHANCE OF FREEZING RAIN. SNOW AFTER MIDNIGHT.    
SUNDAY
 
NORTH GALES TO 35 KNOTS BECOMING NORTHWEST GALES TO  
45 KNOTS BY LATE MORNING, THEN INCREASING TO STORM FORCE WINDS TO  
55 KNOTS BY MID AFTERNOON. BLOWING SNOW. SNOW. VISIBILITY ONE  
QUARTER MILE OR LESS AT TIMES IN THE AFTERNOON.    
SUNDAY NIGHT
 
NORTHWEST STORM FORCE WINDS TO 55 KNOTS  
DIMINISHING TO GALES TO 40 KNOTS AFTER MIDNIGHT. BLOWING SNOW.  
SCATTERED SNOW SHOWERS. VISIBILITY ONE QUARTER MILE OR LESS AT  
TIMES.    
MONDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS BACKING WEST IN THE  
AFTERNOON. PATCHY BLOWING SNOW. SCATTERED SNOW SHOWERS.    
MONDAY NIGHT
 
WEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW  
SHOWERS.    
TUESDAY
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. A CHANCE  
OF SNOW SHOWERS.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS. PATCHY BLOWING SNOW. A CHANCE OF SNOW SHOWERS.  
 
NOTE, WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.  
 

 
 
LSZ265-231730-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
423 AM EST SAT FEB 23 2019  
 
...STORM WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY  
EVENING...  
   
EARLY THIS MORNING
 
SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SNOW.    
TODAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO  
25 KNOTS. SNOW. FREEZING RAIN IN THE AFTERNOON.    
TONIGHT
 
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY MIDNIGHT, THEN BECOMING NORTHEAST 20 TO 30 KNOTS  
LATE. A CHANCE OF FREEZING RAIN AND SNOW IN THE EVENING, THEN  
SNOW AFTER MIDNIGHT.    
SUNDAY
 
NORTH GALES TO 40 KNOTS BECOMING NORTHWEST STORM FORCE  
WINDS TO 60 KNOTS. BLOWING SNOW. SNOW. VISIBILITY ONE QUARTER  
MILE OR LESS AT TIMES.    
SUNDAY NIGHT
 
NORTHWEST STORM FORCE WINDS TO 60 KNOTS  
DIMINISHING TO GALES TO 40 KNOTS AFTER MIDNIGHT. BLOWING SNOW.  
PERIODS OF SNOW SHOWERS IN THE EVENING. SCATTERED SNOW SHOWERS  
AFTER MIDNIGHT. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES.    
MONDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS BACKING WEST IN THE  
AFTERNOON. PATCHY BLOWING SNOW.    
MONDAY NIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS.    
TUESDAY
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. A CHANCE  
OF SNOW SHOWERS.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS. PATCHY BLOWING SNOW. A CHANCE OF SNOW SHOWERS.  
 
NOTE, WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.  
 

 
 
LSZ266-231730-  
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-  
423 AM EST SAT FEB 23 2019  
 
...STORM WARNING IN EFFECT FROM SUNDAY MORNING THROUGH LATE  
SUNDAY NIGHT...  
   
EARLY THIS MORNING
 
SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT  
CHANCE OF SNOW. WAVES CALM TO 2 FEET.    
TODAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO  
25 KNOTS. SNOW. A CHANCE OF RAIN AND FREEZING RAIN IN THE  
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST LATE. A  
CHANCE OF RAIN AND SNOW, POSSIBLY MIXED WITH FREEZING RAIN IN THE  
EVENING, THEN SNOW, POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT.  
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SUNDAY
 
NORTH GALES TO 40 KNOTS BECOMING NORTHWEST STORM FORCE  
WINDS TO 60 KNOTS. BLOWING SNOW. FREEZING SPRAY IN THE AFTERNOON.  
SNOW. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES. WAVES  
BUILDING TO 15 TO 20 FEET OCCASIONALLY TO 25 FEET.    
SUNDAY NIGHT
 
NORTHWEST STORM FORCE WINDS TO 60 KNOTS. HEAVY  
FREEZING SPRAY AND BLOWING SNOW. PERIODS OF SNOW SHOWERS IN THE  
EVENING. SCATTERED SNOW SHOWERS AFTER MIDNIGHT. VISIBILITY ONE  
QUARTER MILE OR LESS AT TIMES. WAVES SUBSIDING TO 10 TO 14 FEET  
OCCASIONALLY TO 18 FEET.    
MONDAY
 
NORTHWEST GALES TO 40 KNOTS BECOMING WEST 20 TO  
30 KNOTS IN THE AFTERNOON. HEAVY FREEZING SPRAY AND AREAS OF  
BLOWING SNOW. SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST  
15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY BLOWING SNOW IN THE  
EVENING. HEAVY FREEZING SPRAY. SCATTERED SNOW SHOWERS. WAVES 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO  
20 KNOTS. HEAVY FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES  
SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. HEAVY  
FREEZING SPRAY. PATCHY BLOWING SNOW. SNOW SHOWERS LIKELY. WAVES  
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ267-231730-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
423 AM EST SAT FEB 23 2019  
 
...STORM WARNING IN EFFECT FROM SUNDAY MORNING THROUGH LATE  
SUNDAY NIGHT...  
   
EARLY THIS MORNING
 
SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT  
CHANCE OF SNOW. WAVES CALM TO 2 FEET.    
TODAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO  
25 KNOTS BY MID AFTERNOON. SNOW. A CHANCE OF FREEZING RAIN IN THE  
AFTERNOON. PATCHY BLOWING SNOW IN THE AFTERNOON. WAVES CALM TO  
2 FEET.    
TONIGHT
 
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS  
BY MIDNIGHT. A CHANCE OF SNOW, POSSIBLY MIXED WITH RAIN AND  
FREEZING RAIN IN THE EVENING, THEN RAIN, SNOW, POSSIBLY MIXED  
WITH FREEZING RAIN AND SLEET AFTER MIDNIGHT. WAVES BUILDING TO  
1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST GALES  
TO 45 KNOTS BY LATE MORNING, THEN INCREASING TO STORM FORCE WINDS  
TO 55 KNOTS BY MID AFTERNOON. PATCHY BLOWING SNOW IN THE MORNING.  
BLOWING SNOW IN THE AFTERNOON. RAIN, POSSIBLY MIXED WITH FREEZING  
RAIN IN THE MORNING. SNOW. VISIBILITY ONE QUARTER MILE OR LESS AT  
TIMES IN THE AFTERNOON. WAVES BUILDING TO 15 TO 20 FEET  
OCCASIONALLY TO 25 FEET.    
SUNDAY NIGHT
 
NORTHWEST STORM FORCE WINDS TO 60 KNOTS  
DIMINISHING TO GALES TO 45 KNOTS AFTER MIDNIGHT. HEAVY FREEZING  
SPRAY IN THE EVENING. BLOWING SNOW. PERIODS OF SNOW SHOWERS.  
VISIBILITY ONE QUARTER MILE OR LESS AT TIMES. WAVES SUBSIDING TO  
10 TO 14 FEET OCCASIONALLY TO 18 FEET.    
MONDAY
 
NORTHWEST GALES TO 40 KNOTS. BLOWING SNOW. NUMEROUS  
SNOW SHOWERS IN THE MORNING. SCATTERED SNOW SHOWERS IN THE  
AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.   
MONDAY NIGHT
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY BLOWING SNOW. SCATTERED  
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO  
7 FEET.    
TUESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. A  
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. PATCHY  
BLOWING SNOW. SNOW SHOWERS LIKELY. WAVES BUILDING TO 2 TO 4 FEET,  
THEN SUBSIDING TO CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 

 
 
LSZ261-231730-  
MAFOR 2310/  
SUPERIOR WEST 11207 12217 11210 11220 12120 11837. A CHANCE OF  
LIGHT FREEZING RAIN THIS AFTERNOON. A CHANCE OF RAIN THIS  
EVENING, THEN A CHANCE OF LIGHT FREEZING RAIN OVERNIGHT. WAVES  
OMITTED DUE TO THE LAKE BEING MOSTLY ICE COVERED.  
 
SUPERIOR NORTH CENTRAL 11300 11317 12327 11330 11230 11220 11137.  
A CHANCE OF LIGHT FREEZING RAIN TONIGHT. WAVES OMITTED DUE TO THE  
LAKE BEING MOSTLY ICE COVERED.  
 
SUPERIOR SOUTH CENTRAL 11310 11317 12327 11330 11230 11237 11137.  
A CHANCE OF LIGHT FREEZING RAIN THIS AFTERNOON. A CHANCE OF RAIN  
THIS EVENING. WAVES OMITTED DUE TO THE LAKE BEING MOSTLY ICE  
COVERED.  
 
SUPERIOR EAST 12310 12327 11247 12240 11247. A CHANCE OF LIGHT  
FREEZING RAIN THIS AFTERNOON. A CHANCE OF RAIN AND LIGHT FREEZING  
RAIN THIS EVENING. WAVES 1 TO 4 FEET TODAY. WAVES 3 TO 6 FEET  
TONIGHT. WAVE HEIGHTS ARE FOR ICE FREE AREAS.  
 

 
 
ROLFSON  
 
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

Canadian Mind-Boggling Facts
The Longest Coastline, If you walked and walked and never stopped — not to eat, not to rest your feet, not to get some sleep— it would take you four and a half years to walk the length of Canada's coastline. While our country might not conjure up images of blue waters and white sandy beaches, Canada has the world's longest coastline, bordered on three sides by three different oceans: the Atlantic, Arctic and Pacific. To put that in perspective, Canada has 202,080 of the world's total 356,000 kilometres of oceanfront property. The only other country that even comes close is Indonesia, which has 54,716 km of coastline.