772  
FZUS63 KMQT 190211  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
911 PM EST SAT JAN 18 2025  
 
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  
A TIGHT PRESSURE GRADIENT WILL CONTINUE OVER THE AREA  
BETWEEN AN EXITING LOW PRESSURE SYSTEM AND HIGH PRESSURE BUILDING  
TO 31.0 INCHES OVER THE HIGH PLAINS. RIDGING BUILDS TO BETWEEN  
30.4 AND 30.6 INCHES ACROSS THE LAKE BY MONDAY NIGHT/TUESDAY AS  
THE SPRAWLING SURFACE HIGH DESCENDS TOWARDS THE MID MISSISSIPPI  
VALLEY. THEN, A WEAK CLIPPER LOW OF 30.0 INCHES PASSES EAST OVER  
LAKE SUPERIOR WEDNESDAY NIGHT INTO THURSDAY.  
 
LSZ162-191015-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
911 PM EST SAT JAN 18 2025 /811 PM CST SAT JAN 18 2025/  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY  
AFTERNOON...  
   
REST OF TONIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS. HEAVY FREEZING  
SPRAY. A CHANCE OF SNOW SHOWERS. WAVES 4 TO 7 FEET OCCASIONALLY  
TO 9 FEET SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
SUNDAY  
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT  
NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN SUBSIDING  
TO 2 TO 4 FEET.    
MONDAY  
NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW SHOWERS.  
WAVES 2 TO 4 FEET.    
MONDAY NIGHT  
NORTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,  
THEN SUBSIDING TO 2 TO 4 FEET.    
TUESDAY  
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS  
IN THE AFTERNOON. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING  
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY  
NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST. WAVES  
BUILDING TO 1 TO 3 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
 
LSZ263-191015-  
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-  
911 PM EST SAT JAN 18 2025  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY  
AFTERNOON...  
   
REST OF TONIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS LATE. HEAVY FREEZING SPRAY. A CHANCE OF SNOW  
SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY  
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS BY LATE MORNING, THEN INCREASING TO 15 TO 25 KNOTS BY  
MID AFTERNOON. HEAVY FREEZING SPRAY IN THE MORNING. SNOW SHOWERS.  
WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT  
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO  
10 TO 20 KNOTS BY MIDNIGHT. HEAVY FREEZING SPRAY IN THE EVENING.  
SNOW SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY  
NORTHWEST WINDS 10 TO 20 KNOTS. SCATTERED SNOW SHOWERS  
IN THE MORNING, THEN SNOW SHOWERS IN THE AFTERNOON. WAVES 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY NIGHT  
NORTHWEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS.  
WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TUESDAY  
WEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY. SNOW  
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING  
SPRAY. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO  
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 2 TO 4 FEET.    
THURSDAY  
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
 
LSZ264-191015-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
911 PM EST SAT JAN 18 2025  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS LATE. HEAVY FREEZING SPRAY. SNOW SHOWERS LIKELY.  
WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY  
NORTHWEST WINDS 10 TO 20 KNOTS. HEAVY FREEZING SPRAY IN  
THE MORNING. SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
SUNDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY  
MIDNIGHT, THEN BACKING NORTHWEST LATE. HEAVY FREEZING SPRAY IN  
THE EVENING. SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
MONDAY  
NORTHWEST WINDS 10 TO 20 KNOTS. SNOW SHOWERS. WAVES  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS. SNOW SHOWERS.  
WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY  
WEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS. HEAVY  
FREEZING SPRAY IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
TUESDAY NIGHT  
WEST WINDS 20 TO 30 KNOTS BACKING SOUTHWEST  
AFTER MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS. WAVES  
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO  
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 2 TO 4 FEET.    
THURSDAY  
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO  
3 TO 5 FEET OCCASIONALLY TO 7 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
 
LSZ265-191015-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
911 PM EST SAT JAN 18 2025  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT  
NORTHWEST WINDS TO 30 KNOTS WITH A FEW GALE  
FORCE GUSTS TO 35 KNOTS POSSIBLE DIMINISHING TO 20 TO 30 KNOTS BY  
MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS LIKELY. WAVES 4 TO  
7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
SUNDAY  
NORTHWEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY IN  
THE MORNING. NUMEROUS SNOW SHOWERS. WAVES 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS. SNOW SHOWERS.  
WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY  
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS IN THE AFTERNOON. SNOW SHOWERS. WAVES SUBSIDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY NIGHT  
WEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS. WAVES  
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY  
WEST WINDS 15 TO 25 KNOTS. SNOW SHOWERS IN THE  
MORNING, THEN SCATTERED SNOW SHOWERS IN THE AFTERNOON. WAVES  
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW  
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.    
THURSDAY  
WEST WINDS 15 TO 25 KNOTS. WAVES CALM TO 2 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
 
LSZ266-191015-  
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-  
911 PM EST SAT JAN 18 2025  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT  
NORTHWEST WINDS TO 30 KNOTS WITH A FEW GALE  
FORCE GUSTS TO 35 KNOTS POSSIBLE DIMINISHING TO 20 TO 30 KNOTS BY  
MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS. WAVES 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO  
10 FEET.    
SUNDAY  
NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. HEAVY FREEZING SPRAY. SNOW SHOWERS.  
WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
SUNDAY NIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO  
15 TO 25 KNOTS BY MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS.  
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
MONDAY  
NORTHWEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY.  
SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
MONDAY NIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS. HEAVY FREEZING  
SPRAY. SNOW SHOWERS. WAVES BUILDING TO 4 TO 8 FEET OCCASIONALLY  
TO 10 FEET.    
TUESDAY  
WEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY. SNOW  
SHOWERS. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 20 TO 30 KNOTS. HEAVY FREEZING  
SPRAY. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 5 TO 9 FEET  
OCCASIONALLY TO 11 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES  
SUBSIDING TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY  
WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
 
LSZ267-191015-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
911 PM EST SAT JAN 18 2025  
 
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH  
15 TO 25 KNOTS BY MIDNIGHT. FREEZING SPRAY. SNOW SHOWERS. WAVES  
7 TO 10 FEET OCCASIONALLY TO 13 FEET SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
SUNDAY  
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST BY LATE  
MORNING, THEN BACKING NORTHWEST BY MID AFTERNOON. SNOW SHOWERS.  
FREEZING SPRAY IN THE AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY  
TO 9 FEET.    
SUNDAY NIGHT  
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MIDNIGHT. HEAVY FREEZING SPRAY. SNOW SHOWERS. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY  
NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH IN THE  
AFTERNOON. SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
MONDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH  
15 TO 25 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. SNOW  
SHOWERS. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TUESDAY  
WEST WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY. SNOW  
SHOWERS. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 20 TO 30 KNOTS. HEAVY FREEZING  
SPRAY. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 4 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
WEDNESDAY  
SOUTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES  
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING  
TO 2 TO 4 FEET.    
THURSDAY  
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS.  
FREEZING SPRAY. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO  
7 FEET.  
 
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.  
 
 
LSZ261-191015-  
MAFOR 1904/  
SUPERIOR WEST...HEAVY FREEZING SPRAY WARNING...13742 14737 11737.  
WAVES 3 TO 7 FEET.  
 
SUPERIOR NORTH CENTRAL...HEAVY FREEZING SPRAY WARNING...12747  
12737 13727 11737. WAVES 3 TO 7 FEET.  
 
SUPERIOR SOUTH CENTRAL...HEAVY FREEZING SPRAY WARNING...11747  
12737 12727 13737. WAVES 3 TO 8 FEET.  
 
SUPERIOR EAST...HEAVY FREEZING SPRAY WARNING...13737 12827 11727  
11737 11837. WAVES 4 TO 9 FEET.  
 
 
 
07  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MQT/GLFTABLE  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab MI Page
Main Text Page