007  
FZUS63 KMQT 232006  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
406 PM EDT SAT JUN 23 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
 
LOW PRESSURE OF 29.7 INCHES OVER NORTHEAST INDIANA  
THIS EVENING WILL REACH THE LOWER GREAT LAKES TONIGHT. MEANWHILE,  
A LOW PRESSURE TROUGH OF 29.8 INCHES EXTENDING WEST TO EAST  
ACROSS NORTHERN ONTARIO WILL SETTLE ACROSS LAKE SUPERIOR THIS  
EVENING. IN ITS WAKE, HIGH PRESSURE OF 30.2 INCHES WILL BUILD  
OVER NORTHERN ONTARIO OVERNIGHT AND SUNDAY. AS THE HIGH THEN  
SHIFTS SOUTHEAST, REACHING THE MID-ATLANTIC STATES TUESDAY  
MORNING, 29.7 INCH LOW PRESSURE WILL TRACK NORTHEAST ACROSS THE  
PLAINS TO THE UPPER MISSISSIPPI VALLEY. THIS LOW DEEPENS TO 29.5  
INCHES AS IT MOVES ACROSS THE UPPER GREAT LAKES TUESDAY NIGHT AND  
WEDNESDAY AFTERNOON. THE LOW TRACKS ACROSS SOUTHERN QUEBEC ON  
WEDNESDAY EVENING. IN ITS WAKE, WEAK HIGH PRESSURE OF 29.9 INCHES  
BUILDS INTO THE NORTHERN PLAINS THROUGH WEDNESDAY. THE HIGH  
WEAKENS TO 29.8 INCHES OVER THE UPPER GREAT LAKES ON THURSDAY.  
 
LSZ162-240415-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
406 PM EDT SAT JUN 23 2018 /306 PM CDT SAT JUN 23 2018/  
   
LATE THIS AFTERNOON
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF RAIN  
SHOWERS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET, THEN SUBSIDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
MONDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST AFTER  
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
TUESDAY
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. SHOWERS LIKELY. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM  
TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ263-240415-  
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-  
406 PM EDT SAT JUN 23 2018  
   
LATE THIS AFTERNOON
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS LATE. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY  
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET,  
THEN SUBSIDING TO 2 TO 4 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
MONDAY NIGHT
 
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER  
MIDNIGHT. A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
TUESDAY
 
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES  
CALM TO 2 FEET.    
TUESDAY NIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES  
CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ264-240415-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
406 PM EDT SAT JUN 23 2018  
   
LATE THIS AFTERNOON
 
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT
 
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS AFTER MIDNIGHT, THEN DIMINISHING TO 10 TO 20 KNOTS LATE.  
A SLIGHT CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
SUNDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS  
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST  
10 TO 20 KNOTS AFTER MIDNIGHT, THEN VEERING EAST LATE. WAVES CALM  
TO 2 FEET.    
MONDAY
 
EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
TUESDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH MIDNIGHT,  
THEN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 1 TO 3 FEET.    
WEDNESDAY
 
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.   
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ265-240415-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
406 PM EDT SAT JUN 23 2018  
   
LATE THIS AFTERNOON
 
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 2 TO  
4 FEET.    
SUNDAY
 
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH LATE. A  
SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS VEERING EAST LATE.  
WAVES CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
TUESDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO  
CALM TO 2 FEET.    
WEDNESDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO  
20 KNOTS. WAVES CALM TO 2 FEET.    
THURSDAY
 
WEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES CALM  
TO 2 FEET.  
 

 
 
LSZ266-240415-  
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-  
406 PM EDT SAT JUN 23 2018  
   
LATE THIS AFTERNOON
 
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM  
TO 2 FEET.    
TONIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER  
MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTH LATE. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING EAST LATE.  
WAVES CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO  
3 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
TUESDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST  
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH  
MIDNIGHT. SHOWERS LIKELY AFTER MIDNIGHT. WAVES 1 TO 3 FEET.    
WEDNESDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. A CHANCE  
OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO  
2 FEET.  
 

 
 
LSZ267-240415-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
406 PM EDT SAT JUN 23 2018  
   
LATE THIS AFTERNOON
 
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT
 
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.    
SUNDAY
 
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO  
15 KNOTS IN THE AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS  
LATE. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING EAST LATE.  
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
MONDAY
 
EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
TUESDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF  
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
THURSDAY
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO  
2 FEET.  
 

 
 
LSZ261-240415-  
MAFOR 2321/  
SUPERIOR WEST 12110 15120. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5  
FEET TONIGHT AND SUNDAY.  
 
SUPERIOR NORTH CENTRAL 11100 14120 11120 11110 11100. WAVES 1  
FOOT OR LESS BUILDING TO 2 TO 5 FEET TONIGHT AND SUNDAY.  
 
SUPERIOR SOUTH CENTRAL 11200 11100 11800 11100 13110 11800. WAVES  
1 FOOT OR LESS BUILDING TO 2 TO 4 FEET TONIGHT AND SUNDAY.  
 
SUPERIOR EAST 11800 11810 14120 11110 11810. WAVES 1 TO 5 FEET  
TONIGHT SUBSIDING TO 1 TO 2 FEET SUNDAY.  
 

 
 
JSS  
 
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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