783  
FZUS63 KMQT 300206  
GLFLS  
 
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
1006 PM EDT SAT APR 29 2017  
 
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR  
 
WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH  
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE  
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL  
OCCASIONALLY BE ENCOUNTERED.  
   
SYNOPSIS
 
AS A 30.4 INCH RIDGE OVER THE UPPER GREAT LAKES  
SLIDES EAST OVERNIGHT AND SUNDAY...A 29.4 INCH LOW OVER THE CENTRAL  
PLAINS WILL DEEPEN TO 29.1 INCHES WHILE LIFTING NORTHEAST ACROSS  
WISCONSIN AND EASTERN UPPER MICHIGAN BY MONDAY NIGHT. THE LOW WILL  
THEN WEAKEN TO AROUND 29.2 INCHES AS IT CONTINUES TO MOVE NORTHEAST  
INTO QUEBEC ON TUESDAY...LEAVING A TROUGH AVERAGING 29.5 INCHES OVER  
THE UPPER GREAT LAKES. THE PRESSURE GRADIENT WILL THEN RELAX ACROSS  
THE UPPER GREAT LAKES AS A WEAK HIGH PRESSURE OF 30.2 INCHES MOVES  
IN. THIS HIGH BUILDS TO 30.3 INCHES ON THURSDAY...WHILE A LOW OF  
29.6 INCHES LIFTS ACROSS THE LOWER MISSISSIPPI RIVER VALLEY INTO THE  
TENNESSEE VALLEY.  
 
LSZ162-301015-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
1006 PM EDT SAT APR 29 2017 /906 PM CDT SAT APR 29 2017/  
 
...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY  
AFTERNOON...  
   
REST OF TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO  
1 TO 3 FEET.    
SUNDAY
 
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO  
30 KNOTS BY MID AFTERNOON. SCATTERED RAIN SHOWERS BY MID  
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT
 
NORTHEAST GALES TO 40 KNOTS. SNOW LIKELY THROUGH  
MIDNIGHT. RAIN. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES BUILDING  
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
MONDAY
 
NORTHEAST GALES TO 40 KNOTS DIMINISHING TO 20 TO  
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS...POSSIBLY MIXED WITH  
SNOW SHOWERS. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO  
13 FEET...THEN SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY NIGHT
 
NORTH WINDS 15 TO 25 KNOTS. RAIN SHOWERS AND SNOW  
SHOWERS LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF RAIN AND SNOW  
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.    
TUESDAY
 
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID  
AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY AFTERNOON. A  
CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.   
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ263-301015-  
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-  
1006 PM EDT SAT APR 29 2017  
 
...GALE WARNING IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT
 
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SUNDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. SCATTERED RAIN SHOWERS BY MID AFTERNOON. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SUNDAY NIGHT
 
NORTHEAST GALES TO 40 KNOTS. A CHANCE OF RAIN  
THROUGH MIDNIGHT. A CHANCE OF SNOW. RAIN AFTER MIDNIGHT. WAVES  
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN SHOWERS
 
POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET...THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH  
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...POSSIBLY MIXED WITH  
SNOW SHOWERS THROUGH MIDNIGHT...THEN A CHANCE OF RAIN AND SNOW  
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO  
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS.  
WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER  
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST.  
WAVES CALM TO 2 FEET.  
 

 
 
LSZ264-301015-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
1006 PM EDT SAT APR 29 2017  
 
...GALE WARNING IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
EVENING...  
   
REST OF TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO  
1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. ISOLATED RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING  
TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST  
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH  
MIDNIGHT. A CHANCE OF SNOW. RAIN AFTER MIDNIGHT. WAVES BUILDING  
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY...NORTHEAST GALES TO 35 KNOTS. RAIN SHOWERS
 
POSSIBLY  
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET...THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
MONDAY NIGHT
 
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH  
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS  
LIKELY. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW  
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.    
TUESDAY NIGHT
 
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
WEDNESDAY
 
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES  
BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ265-301015-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
1006 PM EDT SAT APR 29 2017  
 
...GALE WARNING IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
AFTERNOON...  
   
REST OF TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO  
1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. SCATTERED RAIN SHOWERS BY MID AFTERNOON. WAVES  
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.    
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO  
35 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...WITH A CHANCE OF SNOW  
THROUGH MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10  
FEET.   
MONDAY
 
EAST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS BY  
MID AFTERNOON. RAIN SHOWERS LIKELY. WAVES BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
MONDAY NIGHT
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTH AFTER  
MIDNIGHT. RAIN SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS AFTER  
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO  
4 FEET.    
TUESDAY
 
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS.  
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET...THEN  
SUBSIDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
WEDNESDAY
 
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO  
20 KNOTS. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES  
CALM TO 2 FEET.  
 

 
 
LSZ266-301015-  
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-  
1006 PM EDT SAT APR 29 2017  
 
...GALE WARNING IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  
AFTERNOON...  
   
REST OF TONIGHT
 
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO  
1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. SCATTERED RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.   
SUNDAY NIGHT
 
EAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO  
35 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...WITH A CHANCE OF SNOW  
THROUGH MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING  
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.    
MONDAY
 
EAST GALES TO 35 KNOTS BECOMING SOUTHEAST 20 TO  
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY. WAVES BUILDING TO  
6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH  
AFTER MIDNIGHT. RAIN SHOWERS LIKELY EARLY...THEN SNOW SHOWERS  
LIKELY AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY  
TO 7 FEET.    
TUESDAY
 
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO  
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS.  
WAVES SUBSIDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.   
WEDNESDAY
 
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH. WAVES  
BUILDING TO 1 TO 3 FEET.  
 

 
 
LSZ267-301015-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
1006 PM EDT SAT APR 29 2017  
   
REST OF TONIGHT
 
NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.    
SUNDAY
 
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID  
AFTERNOON. SCATTERED RAIN SHOWERS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
SUNDAY NIGHT
 
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST  
20 TO 30 KNOTS AFTER MIDNIGHT. RAIN. WAVES BUILDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
MONDAY
 
EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO  
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON...  
THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING  
TO CALM TO 2 FEET.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. RAIN SHOWERS LIKELY EARLY...THEN SNOW SHOWERS  
LIKELY AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS.  
WAVES BUILDING TO 2 TO 4 FEET.    
TUESDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.   
WEDNESDAY
 
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST  
5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
THURSDAY
 
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH. WAVES CALM  
TO 2 FEET.  
 

 
LSZ261-301015-  
MAFOR 3003/  
SUPERIOR WEST...GALE WARNING IN EFFECT...12110 12120 11130 13140.  
CHANCE OF RAIN LATE SUNDAY EVENING. WAVES 2 FEET OR LESS  
OVERNIGHT BUILDING TO 3 TO 5 FEET SUNDAY AND SUNDAY EVENING.  
 
SUPERIOR NORTH CENTRAL 11100 11110 13220 13120. CHANCE OF RAIN  
AND SNOW SUNDAY EVENING. WAVES 2 FEET OR LESS OVERNIGHT. WAVES 2  
TO 3 FEET SUNDAY AND SUNDAY EVENING.  
 
SUPERIOR SOUTH CENTRAL 12110 13220 13120. CHANCE OF RAIN AND SNOW  
LATE SUNDAY EVENING. WAVES 1 TO 4 FEET.  
 
SUPERIOR EAST 11120 13220 14120. CHANCE OF RAIN LATE SUNDAY  
EVENING. WAVES 1 TO 4 FEET.  
 

 
 
RJT  
 
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