Marine Weather Forecast from Environment Canada

Winds


Issued 03:00 AM EDT 22 May 2018

Today Tonight and Wednesday. Wind south 10 knots becoming light early this morning then becoming southwest 15 this afternoon. Wind diminishing to light this evening. Wind light Wednesday.

Extended Forecast


Issued 03:00 AM EDT 22 May 2018
Thursday Wind light.
Friday Wind light.
Saturday Wind east 20 knots.

Waves


Issued 03:00 AM EDT 22 May 2018

Today Tonight and Wednesday. Waves one half metre or less building to one half to one metre early this evening then subsiding to less than one half metre near midnight.

Ice Forecast*


Issued 12:00 PM EDT 21 May 2018

Today Tonight and Tuesday Open water.These are the last forecasts for the season.

*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



  
668  
FZUS63 KMQT 220754  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
354 AM EDT TUE MAY 22 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
 
WEAK HIGH PRESSURE OF 30.1 INCHES WILL SET UP OVER THE  
WESTERN GREAT LAKES TODAY. A WEAK LOW PRESSURE TROUGH OF 30.0  
INCHES WILL THEN DROP SOUTH ACROSS LAKE SUPERIOR LATE TONIGHT AND  
WEDNESDAY MORNING. AS THE TROUGH DISSIPATES WEDNESDAY, HIGH  
PRESSURE OF 30.2 INCHES WILL BUILD OVER THE GREAT LAKES REGION.  
THE HIGH WILL DRIFT TOWARD THE MID-ATLANTIC STATES ON THURSDAY AS  
ONE LOW PRESSURE TROUGH OF 29.7 INCHES DROPS ACROSS FAR NORTHERN  
ONTARIO AND A SECOND TROUGH OF 29.7 INCHES EMERGES OVER THE  
WESTERN PLAINS. BOTH TROUGHS WILL MOVE CLOSER TO THE UPPER GREAT  
LAKES ON FRIDAY, THEN CONVERGE OVER THE UPPER GREAT LAKES ON  
SATURDAY.  
 
LSZ162-221600-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
354 AM EDT TUE MAY 22 2018 /254 AM CDT TUE MAY 22 2018/  
   
EARLY THIS MORNING
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TODAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN  
THE AFTERNOON, THEN BACKING EAST LATE. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST  
LESS THAN 10 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO  
15 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO  
2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM  
TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. A CHANCE OF  
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS  
AND THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING  
TO CALM TO 2 FEET.  
 

 
 
LSZ263-221600-  
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-  
354 AM EDT TUE MAY 22 2018  
   
EARLY THIS MORNING
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TODAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TONIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
WEST WINDS 5 TO 15 KNOTS VEERING NORTH IN THE  
AFTERNOON, THEN VEERING NORTHEAST LATE. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
EAST WINDS LESS THAN 10 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM  
TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES CALM TO 2 FEET.    
SATURDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS  
AND THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ264-221600-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
354 AM EDT TUE MAY 22 2018  
   
EARLY THIS MORNING
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TODAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
TONIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST  
LATE. 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 CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM  
TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING EAST. A CHANCE  
OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES 1 TO 3 FEET.  
 

 
 
LSZ265-221600-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
354 AM EDT TUE MAY 22 2018  
   
EARLY THIS MORNING
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TODAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE.  
WAVES CALM TO 2 FEET.    
TONIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST LATE.  
WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST IN THE  
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 BACKING SOUTHEAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO  
2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST  
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES CALM TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO  
2 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ266-221600-  
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-  
354 AM EDT TUE MAY 22 2018  
   
EARLY THIS MORNING
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TODAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST LATE. WAVES  
CALM TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE.  
WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST IN THE  
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 BACKING SOUTHEAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM  
TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING EAST. A CHANCE  
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ267-221600-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
354 AM EDT TUE MAY 22 2018  
   
EARLY THIS MORNING
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TODAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN THE  
AFTERNOON, THEN VEERING NORTHWEST LATE. WAVES CALM TO 2 FEET.    
TONIGHT
 
WEST WINDS LESS THAN 10 KNOTS BECOMING NORTHWEST 5 TO  
15 KNOTS AFTER MIDNIGHT, THEN BECOMING EAST LESS THAN 10 KNOTS  
LATE. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST LATE.  
WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY
 
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
THURSDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM  
TO 2 FEET.    
FRIDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO  
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO  
2 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. A CHANCE  
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.  
 

 
 
LSZ261-221600-  
MAFOR 2209/  
SUPERIOR WEST 12500 12510 14500. WAVES 2 FEET OR LESS.  
 
SUPERIOR NORTH CENTRAL 11500 14510 11510 11500 11400. WAVES 1 TO  
2 FEET.  
 
SUPERIOR SOUTH CENTRAL 11400 11500 12400 12300 12400. WAVES 1  
FOOT OR LESS.  
 
SUPERIOR EAST 11410 11400 11500 11600 12700 11500 11300. WAVES 1  
FOOT OR LESS.  
 

 
 
ROLFSON  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MQT/GLFTABLE  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 




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