983  
FZUS63 KMQT 140800  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
400 AM EDT MON OCT 14 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
 
LOW PRESSURE OF 29.6 INCHES WILL TRACK ACROSS JAMES BAY  
THIS MORNING WHILE A 30.0 INCH RIDGE WILL BUILD ACROSS THE UPPER GREAT  
LAKES, CROSSING LAKE SUPERIOR TONIGHT. LOW PRESSURE OF 29.8 INCHES  
ORGANIZING OVER SOUTHERN MINNESOTA TUESDAY MORNING WILL DEEPEN TO  
29.6 INCHES AS IT TRACKS EAST-NORTHEAST, PASSING OVER NORTHERN-LOWER  
MICHIGAN TUESDAY NIGHT. THE LOW WILL CONTINUE DEEPENING TO 29.4  
INCHES WEDNESDAY WHILE TRACKING ACROSS SOUTHERN ONTARIO. A HIGH  
PRESSURE RIDGE OF 30.0 INCHES WILL SHIFT EAST ACROSS THE LAKE  
SUPERIOR THURSDAY INTO EARLY FRIDAY, GIVING WAY TO A 29.6 INCH  
TROUGH MOVING INTO THE UPPER GREAT LAKES LATE FRIDAY INTO SATURDAY.  
 
LSZ162-141600-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
400 AM EDT MON OCT 14 2019 /300 AM CDT MON OCT 14 2019/  
   
EARLY THIS MORNING
 
WEST WINDS 10 TO 20 KNOTS. WAVES 1 TO  
3 FEET BUILDING TO 2 TO 4 FEET.    
TODAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
IN THE AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. WAVES  
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
TONIGHT
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
AFTER MIDNIGHT, THEN BACKING SOUTHEAST LATE. A SLIGHT CHANCE OF  
RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTH LATE. RAIN  
SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH  
MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET,  
THEN SUBSIDING TO 2 TO 4 FEET.    
WEDNESDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS  
THAN 10 KNOTS 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 SHOWERS. WAVES  
SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ263-141600-  
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-  
400 AM EDT MON OCT 14 2019  
   
EARLY THIS MORNING
 
WEST WINDS 15 TO 25 KNOTS. ISOLATED RAIN  
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TODAY
 
WEST WINDS 15 TO 25 KNOTS. ISOLATED RAIN SHOWERS BY MID  
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT
 
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS LATE. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY
 
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
IN THE AFTERNOON, THEN BECOMING NORTHEAST 20 TO 30 KNOTS LATE. A  
CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON, THEN RAIN SHOWERS  
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET, THEN  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT,  
THEN ISOLATED RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO  
7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
WEDNESDAY
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
THURSDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ264-141600-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
400 AM EDT MON OCT 14 2019  
   
EARLY THIS MORNING
 
WEST WINDS 10 TO 20 KNOTS. WAVES 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TODAY
 
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
IN THE AFTERNOON. ISOLATED RAIN SHOWERS BY MID AFTERNOON. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT
 
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS  
LATE. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES  
SUBSIDING TO 1 TO 3 FEET.    
TUESDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO  
20 KNOTS IN THE AFTERNOON, THEN INCREASING TO 15 TO 25 KNOTS  
LATE. A CHANCE OF SHOWERS THROUGH EARLY AFTERNOON, THEN SHOWERS  
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET, THEN  
BUILDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH  
AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT, THEN  
ISOLATED RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO  
7 FEET OCCASIONALLY TO 9 FEET.    
WEDNESDAY
 
NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET,  
THEN SUBSIDING TO 1 TO 3 FEET.  
 

 
 
LSZ265-141600-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
400 AM EDT MON OCT 14 2019  
   
EARLY THIS MORNING
 
WEST WINDS 15 TO 25 KNOTS. ISOLATED RAIN  
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TODAY
 
WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS  
IN THE AFTERNOON, THEN DIMINISHING TO 15 TO 25 KNOTS LATE.  
ISOLATED RAIN SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET, THEN  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TONIGHT
 
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS LATE. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING EAST 15 TO 25 KNOTS  
IN THE AFTERNOON, THEN INCREASING TO 30 KNOTS WITH A FEW GALE  
FORCE GUSTS TO 35 KNOTS POSSIBLE LATE. RAIN SHOWERS. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTH GALES TO 35 KNOTS. SHOWERS THROUGH  
MIDNIGHT, THEN SCATTERED SHOWERS AFTER MIDNIGHT. WAVES BUILDING  
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
WEDNESDAY
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS. WAVES SUBSIDING TO  
4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO  
1 TO 3 FEET.    
THURSDAY
 
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO 3 FEET,  
THEN SUBSIDING TO CALM TO 2 FEET.  
 

 
 
LSZ266-141600-  
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-  
400 AM EDT MON OCT 14 2019  
   
EARLY THIS MORNING
 
WEST WINDS 15 TO 25 KNOTS. SCATTERED RAIN  
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TODAY
 
WEST WINDS 15 TO 25 KNOTS. ISOLATED RAIN SHOWERS. WAVES  
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES  
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY
 
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 15 TO  
25 KNOTS IN THE AFTERNOON, THEN BECOMING EAST 20 TO 30 KNOTS  
LATE. A CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON, THEN RAIN  
SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET, THEN  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH  
AFTER MIDNIGHT. SHOWERS. WAVES BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET.    
WEDNESDAY
 
NORTH WINDS 20 TO 30 KNOTS. SCATTERED SHOWERS. WAVES  
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.    
THURSDAY
 
NORTH WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.  
 

 
 
LSZ267-141600-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
400 AM EDT MON OCT 14 2019  
   
EARLY THIS MORNING
 
WEST WINDS 20 TO 30 KNOTS. SCATTERED  
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TODAY
 
WEST WINDS 20 TO 30 KNOTS. SCATTERED SHOWERS. WAVES  
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS LATE. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES  
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY
 
SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST IN THE  
AFTERNOON, THEN BECOMING EAST 20 TO 30 KNOTS LATE. SHOWERS. WAVES  
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
TUESDAY NIGHT
 
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST  
AFTER MIDNIGHT. SHOWERS. WAVES BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
WEDNESDAY
 
NORTH GALES TO 35 KNOTS. SCATTERED SHOWERS. WAVES  
5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
WEDNESDAY NIGHT
 
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
THURSDAY
 
NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY
 
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.  
 

 
 
LSZ261-141600-  
MAFOR 1409/  
SUPERIOR WEST 12620 13630 12620 11510. WAVES 2 TO 4 FEET BUILDING  
TO 3 TO 5 FEET TODAY. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET  
TONIGHT.  
 
SUPERIOR NORTH CENTRAL 11730 14630 13620. WAVES 3 TO 6 FEET  
TODAY. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET TONIGHT.  
 
SUPERIOR SOUTH CENTRAL 11630 11630 19636 14630 12620. WAVES 3 TO  
5 FEET TODAY. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.  
 
SUPERIOR EAST 13630 11630 19636 11640 12630 11620. WAVES 4 TO 7  
FEET TODAY. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 5 FEET TONIGHT.  
 

 
 
VOSS  
 
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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