477  
FZUS63 KMQT 142058  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
358 PM EST THU DEC 14 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
 
A WEAK LOW OF 29.9 INCHES OVER LAKE SUPERIOR WILL  
MOVE INTO EASTERN ONTARIO LATE FRIDAY. A HIGH OF 30.0 INCHES WILL  
THEN MOVE THROUGH ONTARIO AS A LOW OF 29.8 INCHES PASSES THROUGH  
THE LOWER GREAT LAKES ON SATURDAY. THE REGION WILL THEN BE  
INFLUENCED BY A WEAK HIGH OF 30.2 INCHES CENTERED IN THE NORTHERN  
GREAT PLAINS SUNDAY AND INTO THE EARLY PORTION OF NEXT WEEK.  
 
LSZ162-150500-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
358 PM EST THU DEC 14 2017 /258 PM CST THU DEC 14 2017/  
   
LATE THIS AFTERNOON
 
WEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES CALM TO 2 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. SCATTERED SNOW SHOWERS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 5 TO 15 KNOTS VEERING EAST LATE.  
SCATTERED SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.  
WAVES 2 TO 4 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST IN THE  
AFTERNOON. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO  
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.  
 

 
 
LSZ263-150500-  
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-  
358 PM EST THU DEC 14 2017  
   
LATE THIS AFTERNOON
 
NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED  
SNOW SHOWERS. WAVES 1 TO 3 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH LATE.  
NUMEROUS SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY
 
NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.  
WAVES SUBSIDING TO 1 TO 3 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST  
5 TO 15 KNOTS BY MIDNIGHT, THEN VEERING EAST LATE. SCATTERED SNOW  
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO  
3 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW  
SHOWERS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO  
3 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN THE  
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS VEERING NORTHWEST. A CHANCE OF  
SNOW SHOWERS. FREEZING SPRAY. WAVES BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET, THEN SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.  
 

 
 
LSZ264-150500-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
358 PM EST THU DEC 14 2017  
   
LATE THIS AFTERNOON
 
NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED  
SNOW SHOWERS. WAVES 1 TO 3 FEET.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH LATE.  
SCATTERED SNOW SHOWERS IN THE EVENING, THEN NUMEROUS SNOW SHOWERS  
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY
 
NORTH WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS BY MIDNIGHT, THEN VEERING NORTHEAST LATE. SCATTERED SNOW  
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW  
SHOWERS. WAVES 1 TO 3 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN THE  
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO  
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS VEERING NORTHWEST. A CHANCE OF  
SNOW SHOWERS. FREEZING SPRAY. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.  
 

 
 
LSZ265-150500-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
358 PM EST THU DEC 14 2017  
   
LATE THIS AFTERNOON
 
WEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES 1 TO 3 FEET.    
TONIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW SHOWERS.  
WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY
 
NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST. SNOW  
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY MIDNIGHT, THEN VEERING NORTHEAST LATE. SCATTERED SNOW  
SHOWERS IN THE EVENING, THEN NUMEROUS SNOW SHOWERS AFTER  
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST IN THE  
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW SHOWERS  
LIKELY. WAVES BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.  
 

 
 
LSZ266-150500-  
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-  
358 PM EST THU DEC 14 2017  
   
LATE THIS AFTERNOON
 
WEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW  
SHOWERS. WAVES 2 TO 4 FEET.    
TONIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO  
20 KNOTS LATE. SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
NORTH WINDS 15 TO 25 KNOTS. SNOW SHOWERS. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST  
10 TO 20 KNOTS LATE. FREEZING SPRAY IN THE EVENING. SCATTERED  
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW  
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.  
WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER  
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO  
3 FEET.    
MONDAY
 
SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS. SNOW SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW SHOWERS  
LIKELY. FREEZING SPRAY. WAVES BUILDING TO 8 TO 12 FEET  
OCCASIONALLY TO 15 FEET.  
 

 
 
LSZ267-150500-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
358 PM EST THU DEC 14 2017  
   
LATE THIS AFTERNOON
 
WEST WINDS 15 TO 25 KNOTS. NUMEROUS SNOW  
SHOWERS. WAVES 1 TO 3 FEET.    
TONIGHT
 
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS BY MIDNIGHT, THEN VEERING NORTH LATE. SNOW SHOWERS.  
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
FRIDAY
 
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS. SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.    
FRIDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS LATE. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.    
SATURDAY
 
EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SNOW  
SHOWERS IN THE MORNING. WAVES SUBSIDING TO CALM TO 2 FEET.    
SATURDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
SUNDAY
 
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH IN THE  
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT
 
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST  
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.    
MONDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO  
30 KNOTS. SNOW SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY
 
WEST GALES TO 35 KNOTS VEERING NORTHWEST. SNOW SHOWERS  
LIKELY. WAVES BUILDING TO 8 TO 12 FEET OCCASIONALLY TO 15 FEET.  
 

 
 
LSZ261-150500-  
MAFOR 1422/  
SUPERIOR WEST 11720 12727 11730 14720. SCATTERED SNOW SHOWERS.  
WAVES 1 TO 4 FEET.  
 
SUPERIOR NORTH CENTRAL 12720 11727 11837 12830 12820. SCATTERED  
SNOW SHOWERS THIS EVENING AND FRIDAY. WAVES 1 TO 5 FEET.  
 
SUPERIOR SOUTH CENTRAL 14727 11727 11837 12737. SCATTERED SNOW  
SHOWERS EARLY THIS EVENING. FREEZING SPRAY LATE FRIDAY. WAVES 2  
TO 5 FEET.  
 
SUPERIOR EAST 13727 11717 14827. WAVES 2 TO 4 FEET.  
 

 
 
PETRO  
 
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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