387  
FZUS63 KLOT 201354  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
854 AM CDT WED JUN 20 2018  
 
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
 
A NEARLY STATIONARY FRONTAL BOUNDARY WILL REMAIN  
STRETCHED WEST TO EAST ACROSS ILLINOIS AND INDIANA, SOUTH OF THE  
LAKE, THROUGH THURSDAY. HIGH PRESSURE OF 30.1 INCHES WILL EXTEND  
FROM THE FAR NORTHERN GREAT PLAINS TO SOUTHEAST ONTARIO THROUGH  
THE END OF THE WEEK. A 29.6 INCH LOW WILL FORM OVER THE CENTRAL  
PLAINS TODAY AND MEANDER AROUND THE CENTRAL PLAINS AND MIDDLE  
MISSISSIPPI VALLEY THROUGH FRIDAY. THIS LOW WILL FINALLY MOVE  
ACROSS THE GREAT LAKES REGION ON SATURDAY.  
 
LMZ261-362-364-366-563-565-567-868-202130-  
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-  
854 AM CDT WED JUN 20 2018  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
REST OF TODAY
 
NORTH WINDS AROUND 10 KT BECOMING NORTHWEST.  
WAVES AROUND 1 FT.    
TONIGHT
 
NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST 10 TO 20  
KT LATE. WAVES 1 TO 3 FT.    
THURSDAY
 
NORTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.   
THURSDAY NIGHT
 
EAST WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.    
FRIDAY
 
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 1 TO  
2 FT.    
FRIDAY NIGHT
 
NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.    
SATURDAY
 
NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 1  
TO 3 FT.    
SUNDAY
 
NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-202130-  
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-  
854 AM CDT WED JUN 20 2018  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
REST OF TODAY
 
NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH.  
PATCHY FOG THIS MORNING. SLIGHT CHANCE OF SHOWERS THIS MORNING.  
WAVES 2 TO 4 FT.    
TONIGHT
 
NORTH WINDS 10 TO 20 KT BECOMING EAST 10 TO 15 KT.  
WAVES 1 TO 3 FT.    
THURSDAY
 
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST 10 TO 20  
KT. WAVES 1 TO 3 FT.   
THURSDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KT BECOMING EAST.  
CHANCE OF SHOWERS OVERNIGHT. WAVES 3 TO 5 FT.    
FRIDAY
 
EAST WINDS 10 TO 20 KT BECOMING NORTHEAST. CHANCE OF  
SHOWERS. WAVES 3 TO 5 FT.    
FRIDAY NIGHT
 
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO  
15 KT. CHANCE OF SHOWERS. WAVES 2 TO 4 FT.    
SATURDAY
 
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES 1  
TO 3 FT.   
SUNDAY
 
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 20 KT IN  
THE AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.  
 

 
LMZ761-202130-  
MAFOR 2015/  
MICHIGAN NORTH 11810 12710 11800 11810 12110 11120. WAVES AROUND  
1 FT TODAY. WAVES 1 TO 3 FT TONIGHT AND THURSDAY MORNING.  
 
MICHIGAN SOUTH 11120 13820 13110 11210. WAVES 2 TO 4 FT THIS  
AFTERNOON. WAVES 1 TO 3 FT TONIGHT AND THURSDAY MORNING.  
 

 
 
RODRIGUEZ  
 
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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