483  
FZUS63 KMKX 300156  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI  
856 PM CDT THU MAY 29 2025  
 
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN.  
 
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
 
 
 
HIGH PRESSURE OF 30.2 INCHES CENTERED OVER THE CENTRAL PLAINS  
WILL CONTINUE TO BRING LIGHT WINDS ACROSS MUCH OF THE LAKE  
TONIGHT. HIGHER SOUTHWESTERLY WINDS IN THE NORTHERN THIRD WILL  
CONTINUE AS LOW PRESSURE OF 29.4 INCHES CONTINUES TO PIVOT  
SOUTHEASTWARD THROUGH NORTHERN QUEBEC. A COLD FRONT FROM THIS LOW  
PRESSURE SYSTEM WILL PROGRESS SOUTH-SOUTHWEST ACROSS LAKE  
MICHIGAN FRIDAY AFTERNOON AND EVENING, BRINGING A QUICK WIND SHIFT  
TO NORTHERLY. IN ADDITION, SCATTERED THUNDERSTORMS MAY DEVELOP  
ALONG THIS FRONT, ESPECIALLY ACROSS THE SOUTHERN HALF OF THE LAKE.  
HIGH PRESSURE AROUND 29.9 INCHES WILL THEN BUILD INTO THE REGION  
AND BRING DECREASING WINDS OVER THE WEEKEND.  
 
LMZ261-362-364-366-563-565-567-868-300915-  
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE  
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH  
FOX ISLAND 5 NM OFFSHORE-  
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO  
MID LAKE-  
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO  
MID LAKE-  
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO  
MID LAKE-  
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO  
MID LAKE-  
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID  
LAKE-  
856 PM CDT THU MAY 29 2025  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.    
FRIDAY
 
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 15 TO 25 KT.  
CHANCE OF SHOWERS IN THE MORNING, THEN CHANCE OF SHOWERS AND  
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. PATCHY SMOKE IN  
THE AFTERNOON. WAVES 1 TO 3 FT.    
FRIDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO  
20 KT. PATCHY SMOKE IN THE EVENING. WAVES 2 TO 4 FT.    
SATURDAY
 
NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.    
SATURDAY NIGHT
 
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST  
10 TO 15 KT. WAVES 1 TO 3 FT.    
SUNDAY
 
NORTHWEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST 10 TO  
20 KT. WAVES 1 TO 2 FT.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.    
MONDAY
 
SOUTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES  
4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 4 TO 7 FT OCCASIONALLY  
TO 9 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-300915-  
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE  
TO MID LAKE-  
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM  
OFFSHORE TO MID LAKE-  
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID  
LAKE-  
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO  
MID LAKE-  
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID  
LAKE-  
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID  
LAKE-  
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO  
MID LAKE-  
856 PM CDT THU MAY 29 2025  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
REST OF TONIGHT
 
SOUTH WINDS 5 TO 10 KT BECOMING WEST. WAVES  
1 FT OR LESS.    
FRIDAY
 
WEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.  
PATCHY SMOKE IN THE AFTERNOON. CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 2 FT.    
FRIDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH.  
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. PATCHY SMOKE.  
WAVES 2 TO 4 FT.    
SATURDAY
 
NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.    
SATURDAY NIGHT
 
NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO  
10 KT OVERNIGHT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.    
SUNDAY
 
NORTH WINDS 10 TO 15 KT BECOMING WEST. WAVES 1 TO 2 FT.   
SUNDAY NIGHT
 
SOUTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.  
WAVES 1 TO 2 FT.    
MONDAY
 
SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO 20 KT.  
WAVES 1 TO 3 FT.    
TUESDAY
 
SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES  
4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 4 TO 7 FT OCCASIONALLY  
TO 9 FT.  
 

 
 
LMZ761-300915-  
MAFOR 3004/  
MICHIGAN NORTH 13520 12610 11636 11730 11820. WAVES 2 FEET OR  
LESS OVERNIGHT AND FRIDAY. WAVES 1 TO 3 FEET FRIDAY EVENING.  
 
MICHIGAN SOUTH 11500 14610 11620 12720. A CHANCE OF SHOWERS AND  
THUNDERSTORMS FRIDAY AFTERNOON AND FRIDAY EVENING. WAVES 2 FEET  
OR LESS.  
 

 
 
DDV  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MKX/GLFTABLE  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 
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