661  
FZUS63 KLOT 302007  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
307 PM CDT THU MAR 30 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.  
 
LOW PRESSURE OF 29.5 INCHES OVER CENTRAL ILLINOIS WILL MOVE EAST  
INTO OHIO OVERNIGHT...BEFORE REDEVELOPING OFF THE ATLANTIC COAST  
FRIDAY NIGHT. HIGH PRESSURE OF 30.2 INCHES WILL BUILD SOUTHEAST  
ACROSS THE UPPER MISSISSIPPI VALLEY AND WESTERN GREAT LAKES REGION  
FRIDAY AND FRIDAY NIGHT. THE HIGH PRESSURE RIDGE WILL MOVE EAST OF  
LAKE MICHIGAN LATE SATURDAY NIGHT...WHILE AN AREA OF LOW PRESSURE  
OF 29.4 INCHES DEVELOPS ACROSS MANITOBA BY EARLY SUNDAY. THIS LOW  
WILL FILL SLIGHTLY TO 29.5 INCHES AS IT PASSES NORTH OF LAKE  
SUPERIOR MONDAY...WHILE ANOTHER LOW OF 29.5 INCHES MOVES ACROSS  
THE LOWER MISSISSIPPI VALLEY. WEAK HIGH PRESSURE OF 30.0 INCHES  
WILL MOVE ACROSS THE WESTERN LAKES TUESDAY...AHEAD OF ANOTHER LOW  
PRESSURE SYSTEM MOVING INTO THE MIDWEST WEDNESDAY.  
 
LMZ261-362-364-366-563-565-567-868-310315-  
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-  
307 PM CDT THU MAR 30 2017  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
TONIGHT
 
NORTHEAST WINDS TO 30 KT WITH OCCASIONAL GALE FORCE  
GUSTS TO 35 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF SNOW SHOWERS  
THIS EVENING... THEN CHANCE OF RAIN AND SNOW SHOWERS OVERNIGHT.  
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.    
FRIDAY
 
NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN AND SLIGHT  
CHANCE OF SNOW IN THE MORNING. WAVES 6 TO 9 FT OCCASIONALLY TO  
11 FT.    
FRIDAY NIGHT
 
NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO  
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO  
3 FT.    
SATURDAY
 
NORTH WINDS 10 TO 20 KT BECOMING WEST 5 TO 10 KT IN  
THE AFTERNOON. WAVES 1 TO 3 FT.    
SATURDAY NIGHT
 
NORTHWEST WINDS 5 TO 10 KT BECOMING NORTHEAST.  
WAVES 1 FT OR LESS.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.  
WAVES 2 FT OR LESS.    
SUNDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. RAIN  
LIKELY. WAVES 1 TO 3 FT.    
MONDAY
 
SOUTH WINDS 10 TO 15 KT BECOMING WEST. CHANCE OF RAIN.  
WAVES 1 TO 3 FT.    
TUESDAY
 
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.  
WAVES 1 TO 3 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-310315-  
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-  
307 PM CDT THU MAR 30 2017  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
TONIGHT
 
NORTHEAST WINDS TO 30 KT. RAIN SHOWERS LIKELY. WAVES  
4 TO 7 FT OCCASIONALLY TO 9 FT.    
FRIDAY
 
NORTH WINDS TO 30 KT. CHANCE OF RAIN IN THE MORNING.  
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.    
FRIDAY NIGHT
 
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.  
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 3 TO 5 FT  
OCCASIONALLY TO 7 FT.    
SATURDAY
 
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.  
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.    
SATURDAY NIGHT
 
NORTH WINDS 5 TO 10 KT VEERING TO EAST. WAVES  
1 TO 2 FT.    
SUNDAY
 
SOUTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.  
CHANCE OF RAIN IN THE AFTERNOON. WAVES 1 TO 3 FT.    
SUNDAY NIGHT
 
SOUTHEAST WINDS 10 TO 20 KT. RAIN LIKELY. WAVES  
1 TO 3 FT.    
MONDAY
 
EAST WINDS 10 TO 15 KT BACKING TO NORTH 10 TO 20 KT.  
WAVES 1 TO 3 FT.    
TUESDAY
 
NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.  
 

 
 
LMZ761-310315-  
MAFOR 3021/  
MICHIGAN NORTH 11246 11147 11146 12150 13140. CHANCE OF SNOW  
SHOWERS EARLY THIS EVENING. CHANCE OF RAIN AND SNOW SHOWERS LATE  
THIS EVENING. CHANCE OF RAIN LATE FRIDAY. WAVES 4 TO 7 FT  
OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT  
TONIGHT. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT FRIDAY.  
 
MICHIGAN SOUTH 14146 11146 13840. CHANCE OF THUNDERSTORMS EARLY  
THIS EVENING. CHANCE OF RAIN FRIDAY. WAVES 5 TO 8 FT OCCASIONALLY  
TO 10 FT TONIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT BUILDING  
TO 7 TO 10 FT OCCASIONALLY TO 13 FT FRIDAY.  
 

 
 
RATZER/ED F  
 
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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