684  
FZUS63 KLOT 240138  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
838 PM CDT SUN JUL 23 2017  
 
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
 
 
LOW PRESSURE OF 29.7 INCHES OVER THE EASTERN GREAT LAKES WILL  
REACH NEW ENGLAND MONDAY. A WEAK COLD FRONT TRAILING WEST FROM  
THIS LOW WILL CONTINUE TO MOVE ACROSS THE LAKE TONIGHT WITH HIGH  
PRESSURE OF 30.2 INCHES BUILDING INTO THE WESTERN GREAT LAKES  
MONDAY IN THE WAKE OF THIS FRONT. THIS HIGH WILL SLOWLY MOVE EAST,  
REACHING NEW ENGLAND BY WEDNESDAY MORNING. MEANWHILE, A 29.5 INCH  
LOW WILL TRACK FROM ALBERTA MONDAY NIGHT TO HUDSON BAY BY  
WEDNESDAY MORNING. A COLD FRONT EXTENDING SOUTH FROM THIS LOW WILL  
MOVE ACROSS THE LAKE WEDNESDAY NIGHT.  
 
LMZ261-362-364-366-563-565-567-868-240930-  
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-  
838 PM CDT SUN JUL 23 2017  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
REST OF TONIGHT
 
NORTHEAST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT  
BUILDING TO 3 TO 5 FT.   
MONDAY
 
NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH. WAVES 3 TO  
5 FT.    
MONDAY NIGHT
 
NORTH WINDS 10 TO 20 KT VEERING TO SOUTHEAST 10  
TO 15 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.    
TUESDAY
 
SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.  
WAVES 1 TO 3 FT.    
TUESDAY NIGHT
 
SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO  
25 KT. WAVES 2 TO 4 FT.    
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 25 KT. SHOWERS AND  
THUNDERSTORMS, MAINLY LIKELY IN THE AFTERNOON. WAVES 3 TO 5 FT.    
WEDNESDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH  
10 TO 15 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 3 TO 5 FT  
SUBSIDING TO 1 TO 3 FT.    
THURSDAY
 
NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.  
WAVES BUILDING TO 3 TO 5 FT.    
FRIDAY
 
NORTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-240930-  
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-  
838 PM CDT SUN JUL 23 2017  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
REST OF TONIGHT
 
NORTH WINDS 10 TO 20 KT. WAVES 1 TO 2 FT  
BUILDING TO 2 TO 4 FT.    
MONDAY
 
NORTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.    
MONDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KT VEERING TO SOUTHEAST.  
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.    
TUESDAY
 
SOUTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH.  
WAVES 1 TO 3 FT.    
WEDNESDAY
 
SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4 FT.    
WEDNESDAY NIGHT
 
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST.  
SHOWERS AND THUNDERSTORMS LIKELY. WAVES 1 TO 3 FT.    
THURSDAY
 
NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT IN THE  
AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT  
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.    
FRIDAY
 
NORTHEAST WINDS 10 TO 20 KT. WAVES 3 TO 6 FT  
OCCASIONALLY TO 8 FT.  
 

 
LMZ761-240930-  
MAFOR 2403/  
MICHIGAN NORTH 13130 12120 13820. WAVES 2 TO 4 FEET BUILDING TO 3  
TO 5 FEET OVERNIGHT. WAVES 3 TO 5 FEET MONDAY. WAVES 1 TO 3 FEET  
MONDAY EVENING.  
 
MICHIGAN SOUTH 15820 11820 11120. WAVES 1 TO 2 FEET BUILDING TO 2  
TO 4 FEET OVERNIGHT. WAVES 3 TO 5 FEET MONDAY. WAVES 2 TO 4 FEET  
MONDAY EVENING.  
 

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