394  
FZUS63 KMKX 281959  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI  
259 PM CDT MON APR 28 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
 
 
SOUTHEAST WINDS WILL CONTINUE THIS AFTERNOON AND EVENING AS LOW  
PRESSURE OF 29.4 INCHES TRACKS THROUGH CENTRAL MN. WINDS WILL  
BECOME EVEN MORE GUSTY LATER THIS AFTERNOON, WITH SOUTHERLY  
GALES DEVELOPING ACROSS THE NORTH HALF OF LAKE MICHIGAN. GALES  
WILL CONTINUE ACROSS THE NORTH HALF INTO TUESDAY MORNING AND A  
GALE WARNING IS IN EFFECT, WITH A SLIGHTLY SHORTENED TIME FRAME  
ON THE BACKEND TO 12Z RATHER THAN 15Z. A FEW GUSTS TO GALE  
FORCE ARE POSSIBLE IN THE SOUTH HALF SINCE WINDS JUST ABOVE THE  
COOL LAKE WATER WILL BE GUSTING TO OVER 40 KT, BUT GALES AT THE  
LAKE LEVEL SHOULD NOT BE WIDESPREAD.  
 
MEANWHILE, ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE NORTHERN  
HALF OF THE OPEN WATERS LATER THIS AFTERNOON, WITH STRONG TO  
SEVERE THUNDERSTORMS POSSIBLE ACROSS THE LAKE THIS EVENING AND  
OVERNIGHT. THE MAIN HAZARDS WITH THESE STORMS WOULD BE DAMAGING  
WIND AND HAIL. LOW PRESSURE EXITS INTO QUEBEC ON TUESDAY  
MORNING, BRINGING A COLD FRONT SOUTHEASTWARD ACROSS THE OPEN  
WATERS, ENDING THUNDERSTORM POTENTIAL AND BRINGING WESTERLY  
WINDS JUST BELOW GALE FORCE. WINDS WILL DIMINISH QUICKLY TUESDAY  
NIGHT AS HIGH PRESSURE AROUND 30.2 INCHES MOVES INTO THE  
REGION.  
 
LMZ261-362-364-366-563-565-567-868-290315-  
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-  
259 PM CDT MON APR 28 2025  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
..GALE WARNING IN EFFECT THROUGH TUESDAY MORNING
 
 
   
TONIGHT
 
SOUTH GALES TO 40 KT BECOMING SOUTHWEST GALES TO  
35 KT. CHANCE OF RAIN SHOWERS AND THUNDERSTORMS. WAVES 8 TO 11 FT  
OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO  
12 FT.    
TUESDAY
 
SOUTHWEST GALES TO 35 KT VEERING TO NORTH. CHANCE OF  
RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING.  
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.    
TUESDAY NIGHT
 
NORTH WINDS TO 30 KT BECOMING NORTHEAST 10 TO  
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO  
3 FT.    
WEDNESDAY
 
EAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.  
WAVES 1 TO 3 FT.    
WEDNESDAY NIGHT
 
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST.  
CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 1 TO 2 FT.    
THURSDAY
 
EAST WINDS 10 TO 20 KT BECOMING NORTHEAST. RAIN  
SHOWERS LIKELY. WAVES 2 TO 4 FT.    
THURSDAY NIGHT
 
NORTH WINDS 10 TO 20 KT. CHANCE OF RAIN  
SHOWERS. WAVES 2 TO 4 FT.    
FRIDAY
 
NORTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS.  
WAVES 2 TO 4 FT.    
SATURDAY
 
WEST WINDS 10 TO 20 KT BACKING TO SOUTHWEST. WAVES  
1 TO 3 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-290315-  
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-  
259 PM CDT MON APR 28 2025  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
TONIGHT
 
SOUTH GALES TO 35 KT BECOMING SOUTHWEST. SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS. WAVES 6 TO 9 FT OCCASIONALLY TO  
12 FT.    
TUESDAY
 
SOUTHWEST WINDS TO 30 KT VEERING TO NORTH. WAVES 5 TO  
8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO  
8 FT.    
TUESDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO  
15 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.    
WEDNESDAY
 
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES  
1 TO 3 FT.    
WEDNESDAY NIGHT
 
EAST WINDS 10 TO 15 KT. RAIN SHOWERS LIKELY IN  
THE EVENING, THEN RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT.    
THURSDAY
 
SOUTHEAST WINDS 10 TO 20 KT VEERING TO WEST. RAIN  
SHOWERS. WAVES 2 TO 4 FT.    
THURSDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO  
10 TO 15 KT. RAIN SHOWERS LIKELY. WAVES 2 TO 4 FT.    
FRIDAY
 
NORTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS.  
WAVES 2 TO 4 FT.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KT BACKING TO SOUTH. WAVES  
1 TO 3 FT.  
 

 
 
LMZ761-290315-  
MAFOR 2822/  
MICHIGAN NORTH...GALE WARNING IN EFFECT...12450 11456 11556 11550  
11650 11750 11850. A CHANCE OF THUNDERSTORMS TONIGHT. WAVES 6 TO  
10 FEET TONIGHT. WAVES 5 TO 8 FEET TUESDAY.  
 
MICHIGAN SOUTH 11440 12450 12550 11540 11640 11740. WAVES 5 TO 9  
FEET TONIGHT. WAVES 5 TO 8 FEET SUBSIDING TO 3 TO 6 FEET TUESDAY.  
 

 
 
KUROSKI  
 
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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