599  
FZUS63 KMQT 170739  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
339 AM EDT TUE OCT 17 2017  
 
FOR WATERS BEYOND FIVE 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
 
LOW PRESSURE OF 29.4 INCHES OVER NORTHERN ONTARIO AND  
30.3 INCH HIGH PRESSURE OVER THE OHIO RIVER VALLEY THIS MORNING WILL  
MOVE EAST TODAY TO QUEBEC AND THE EASTERN SEABOARD RESPECTIVELY.  
THE HIGH PRESSURE SYSTEM WILL REMAIN STATIONARY THROUGH SATURDAY  
OVER THE EASTERN SEABOARD. MEANWHILE, A 29.0 INCH LOW PRESSURE  
SYSTEM OVER WESTERN SASKATCHEWAN TONIGHT MOVES TO HUDSON BAY  
WEDNESDAY NIGHT AND REMAINS THERE THROUGH THURSDAY. 29.2 INCH LOW  
PRESSURE WILL DEVELOP OVER EASTERN ALBERTA FRIDAY MORNING AND  
CREATE A TROUGH OF LOW PRESSURE OF 29.4 INCHES OVER THE NORTHERN  
PLAINS SATURDAY MORNING. THIS TROUGH WILL WEAKEN TO 29.6 INCHES IN  
MINNESOTA BY SATURDAY EVENING.  
 
LSZ162-171545-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
339 AM EDT TUE OCT 17 2017 /239 AM CDT TUE OCT 17 2017/  
   
EARLY THIS MORNING
 
WEST WINDS 10 TO 20 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 2 TO 4 FEET.    
TODAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE  
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST AFTER  
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
THURSDAY
 
WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO  
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.    
SATURDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST. A CHANCE OF  
SHOWERS. WAVES 2 TO 4 FEET.  
 

 
 
LSZ263-171545-  
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-  
339 AM EDT TUE OCT 17 2017  
   
EARLY THIS MORNING
 
WEST WINDS 10 TO 20 KNOTS. WAVES 4 TO  
7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
TODAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 15 TO  
25 KNOTS LATE. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO  
7 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO  
4 TO 8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY
 
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING  
TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.  
WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 2 TO 4 FEET.    
SATURDAY
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. A  
CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.  
 

 
 
LSZ264-171545-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
339 AM EDT TUE OCT 17 2017  
   
EARLY THIS MORNING
 
WEST WINDS 10 TO 20 KNOTS. WAVES 4 TO  
7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
TODAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE. WAVES  
SUBSIDING TO 1 TO 3 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS  
AFTER MIDNIGHT, THEN BECOMING SOUTHWEST 15 TO 25 KNOTS LATE.  
WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO  
4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO  
5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY
 
WEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 6 TO  
9 FEET OCCASIONALLY TO 11 FEET, THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. A  
CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO  
8 FEET.  
 

 
 
LSZ265-171545-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
339 AM EDT TUE OCT 17 2017  
   
EARLY THIS MORNING
 
WEST WINDS 15 TO 25 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TODAY
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
TONIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST LATE.  
WAVES BUILDING TO 1 TO 3 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 20 TO  
30 KNOTS IN THE AFTERNOON, THEN VEERING SOUTHWEST LATE. WAVES  
BUILDING TO 2 TO 4 FEET.    
WEDNESDAY NIGHT
 
WEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY
 
WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO 2 TO  
4 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
SATURDAY
 
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST. A  
CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING  
TO 1 TO 3 FEET.  
 

 
 
LSZ266-171545-  
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-  
339 AM EDT TUE OCT 17 2017  
   
EARLY THIS MORNING
 
WEST WINDS 15 TO 25 KNOTS. WAVES 4 TO 7  
FEET OCCASIONALLY TO 9 FEET.    
TODAY
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. WAVES SUBSIDING TO 1 TO 3 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING  
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY
 
SOUTH WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS  
TO 35 KNOTS LATE. WAVES BUILDING TO 4 TO 8 FEET OCCASIONALLY TO  
10 FEET.    
WEDNESDAY NIGHT
 
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET, THEN BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
THURSDAY
 
WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO 4 TO  
7 FEET OCCASIONALLY TO 9 FEET.    
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH  
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
SATURDAY
 
SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ267-171545-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
339 AM EDT TUE OCT 17 2017  
   
EARLY THIS MORNING
 
SOUTHWEST WINDS 20 TO 30 KNOTS. WAVES 4 TO  
7 FEET OCCASIONALLY TO 9 FEET.    
TODAY
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. WAVES SUBSIDING TO 2 TO 4 FEET.    
TONIGHT
 
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25  
KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO 4  
FEET.    
WEDNESDAY
 
SOUTH WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO  
35 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY  
TO 8 FEET.    
WEDNESDAY NIGHT
 
SOUTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE  
FORCE GUSTS TO 35 KNOTS BECOMING WEST AFTER MIDNIGHT. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN BUILDING TO  
5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY
 
WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS  
TO 35 KNOTS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11  
FEET, THEN SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.   
THURSDAY NIGHT
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST  
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET.    
SATURDAY
 
SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN  
SUBSIDING TO 2 TO 4 FEET.  
 

 
 
LSZ261-171545-  
MAFOR 1709/  
SUPERIOR WEST 11620 11610 13510 11410 12520. WAVES 3 TO 5 FEET  
SUBSIDING TO 1 TO 3 FEET TODAY. WAVES 1 TO 3 FEET BUILDING TO 2  
TO 4 FEET TONIGHT.  
 
SUPERIOR NORTH CENTRAL 11630 11620 12610 11510 11410 12420. WAVES  
5 TO 7 FEET SUBSIDING TO 2 TO 3 FEET TODAY. WAVES 2 TO 4 FEET  
BUILDING TO 3 TO 5 FEET TONIGHT.  
 
SUPERIOR SOUTH CENTRAL 11630 12620 11610 11500 11310 12420. WAVES  
3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET TODAY. WAVES 1 TO 3 FEET  
TONIGHT.  
 
SUPERIOR EAST 11530 11630 12620 11610 11410 12420. WAVES 4 TO 7  
FEET SUBSIDING TO 3 TO 5 FEET TODAY. WAVES 2 TO 4 FEET TONIGHT.  
 

 
 
07  
 
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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