774  
FZUS63 KLOT 231344  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
844 AM CDT FRI JUN 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 29.3 INCHES OVER FAR SOUTHERN JAMES  
BAY WILL MOVE EAST ACROSS NORTHERN QUEBEC TODAY. A COOL FRONT  
TRAILING WILL CLEAR THE SOUTHERN TIP OF LAKE MICHIGAN THIS  
MORNING WITH A SECONDARY AREA OF LOW PRESSURE OF 29.7 INCHES OVER  
SOUTHERN WISCONSIN MOVING EAST INTO LOWER MICHIGAN. A WEAK LOW  
WILL THEN DROP A COOL FRONT DOWN THE LAKE SATURDAY NIGHT. HIGH  
PRESSURE 30.3 INCHES WILL THEN STRETCH FROM THE CANADIAN ROCKIES  
TO THE CENTRAL PLAINS BY SATURDAY AND DRIFT EAST TO THE WESTERN  
GREAT LAKES BY MONDAY. A SERIES OF LOW PRESSURE SYSTEMS ARE THEN  
EXPECTED TO TRACK ACROSS THE UPPER GREAT LAKES DURING THE MIDDLE  
AND LATER PART OF NEXT WEEK.  
 
LMZ261-362-364-366-563-565-567-868-232115-  
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-  
844 AM CDT FRI JUN 23 2017  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
REST OF TODAY
 
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO  
20 KT. PATCHY FOG. WAVES 1 TO 3 FT.    
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES 1 TO  
3 FT.    
SATURDAY
 
WEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS IN THE  
AFTERNOON. WAVES 1 TO 3 FT.    
SATURDAY NIGHT
 
NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SHOWERS.  
WAVES 2 TO 4 FT.    
SUNDAY
 
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. CHANCE OF  
SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FT.    
SUNDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH.  
CHANCE OF SHOWERS. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.    
MONDAY
 
NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT SUBSIDING  
TO 1 TO 3 FT.    
TUESDAY
 
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO 25 KT.  
WAVES 1 TO 3 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-232115-  
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-  
844 AM CDT FRI JUN 23 2017  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
REST OF TODAY
 
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST.  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THIS MORNING. WAVES  
1 TO 3 FT.    
TONIGHT
 
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. WAVES 1 TO  
3 FT BUILDING TO 3 TO 5 FT.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES 3 TO  
5 FT SUBSIDING TO 1 TO 3 FT.    
SATURDAY NIGHT
 
WEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.    
SUNDAY
 
WEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.  
CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 2 TO 4 FT.    
SUNDAY NIGHT
 
NORTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS.  
WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.    
MONDAY
 
NORTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT  
OCCASIONALLY TO 8 FT.    
TUESDAY
 
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO 20 KT.  
WAVES 1 TO 3 FT.  
 

 
LMZ761-232115-  
MAFOR 2315/  
MICHIGAN NORTH 11610 12520 12720 13620. WAVES 1 TO 3 FT.  
 
MICHIGAN SOUTH 11710 12610 11620 14720. WAVES 1 TO 3 FT BUILDING  
TO 2 TO 4 FT THIS AFTERNOON. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT  
OCCASIONALLY TO 7 FT TONIGHT AND SATURDAY MORNING.  
 

 
 
KMD  
 
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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