088  
FZUS63 KLOT 230755  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
255 AM CDT SUN APR 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
 
HIGH PRESSURE AVERAGING 30.2 INCHES EXTENDS FROM NEW  
ENGLAND THROUGH THE SOUTHERN LAKES TO THE SOUTHERN PLAINS. THIS  
RIDGE WILL SLOWLY SAG SOUTH AS IT WEAKENS TODAY AND TONIGHT. LOW  
PRESSURE OF 29.7 INCHES NEAR JAMES BAY EARLY THIS MORNING WILL  
MOVE ACROSS NORTHERN QUEBEC TODAY. A TRAILING COLD FRONT WILL  
MOVE SOUTH ACROSS THE LAKE TODAY. LOW PRESSURE OF 29.4 INCHES  
WILL MOVE FROM THE NORTHERN PLAINS MONDAY TO LAKE SUPERIOR  
TUESDAY AND FILL. LOW PRESSURE OF 29.4 INCHES OVER THE CENTRAL  
PLAINS TUESDAY WILL MOVE NORTHEAST TO LAKE MICHIGAN WEDNESDAY.  
 
LMZ261-362-364-366-563-565-567-669-868-870-231400-  
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 SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE  
TO MID LAKE-  
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID  
LAKE-  
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID  
LAKE-  
255 AM CDT SUN APR 23 2017  
 
PORT WASHINGTON WI TO WHITEHALL MI NORTH...  
   
TODAY
 
SOUTHWEST WINDS 10 TO 20 KT SHIFTING NORTHEAST 15 TO 20  
KT THIS MORNING. WAVES 2 TO 4 FT.   
TONIGHT
 
NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES 2 TO  
4 FT.    
MONDAY
 
SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES  
3 TO 5 FT OCCASIONALLY TO 7 FT.    
MONDAY NIGHT
 
SOUTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO 25  
KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.   
TUESDAY
 
SOUTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.  
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.   
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO  
25 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.    
WEDNESDAY
 
EAST WINDS 15 TO 25 KT BECOMING NORTHEAST TO 30 KT  
IN THE AFTERNOON. RAIN SHOWERS LIKELY. WAVES 3 TO 5 FT  
OCCASIONALLY TO 7 FT.    
THURSDAY
 
WEST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES  
4 TO 6 FT OCCASIONALLY TO 8 FT.  
 

 
 
LMZ080-671-673-675-777-779-872-874-876-878-231400-  
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-  
255 AM CDT SUN APR 23 2017  
 
PORT WASHINGTON WI TO WHITEHALL MI SOUTH...  
   
TODAY
 
SOUTHWEST WINDS 10 TO 15 KT SHIFTING NORTHEAST 10 TO 20  
KT THIS AFTERNOON. WAVES 1 TO 3 FT.    
TONIGHT
 
NORTHEAST WINDS 10 TO 20 KT BECOMING EAST 10 TO 15 KT.  
WAVES 2 TO 4 FT.   
MONDAY
 
EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 10 TO 15 KT.  
WAVES 2 TO 4 FT.    
MONDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO  
25 KT. WAVES 2 TO 4 FT.    
TUESDAY
 
SOUTHEAST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT  
OCCASIONALLY TO 7 FT.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH.  
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.    
WEDNESDAY
 
SOUTH WINDS INCREASING TO 30 KT IN THE AFTERNOON.  
RAIN SHOWERS LIKELY. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.    
THURSDAY
 
WEST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT IN  
THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.  
 

 
 
LMZ761-231400-  
MAFOR 2309/  
MICHIGAN NORTH 10520 11620 19820 11820 15120. WAVES 2 TO 4 FT.  
 
MICHIGAN SOUTH 13510 11510 19120 12120 11110 11210. WAVES 1 TO  
3 FT TODAY AND 2 TO 4 FT TONIGHT.  
 

 
 
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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