560  
FZUS63 KLOT 131443  
GLFLM  
 
OPEN LAKE FORECAST FOR LAKE MICHIGAN  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
843 AM CST WED DEC 13 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 SOUTHEAST MINNESOTA  
WILL MOVE TO FAR SOUTHERN LAKE MICHIGAN THIS AFTERNOON AND THEN TO  
THE MID ATLANTIC COAST THURSDAY MORNING. LOW PRESSURE WILL  
DEVELOP OVER LAKE SUPERIOR THURSDAY EVENING AND DEEPEN TO 29.6  
INCHES AS IT MOVES TO LAKE HURON FRIDAY AFTERNOON. A 30.1 INCH  
HIGH WILL STRENGTHEN TO 30.2 INCHES AS IT CROSSES ONTARIO FRIDAY  
NIGHT AND SATURDAY. THE HIGH WILL MERGE WITH ANOTHER HIGH OVER THE  
SOUTHEAST U.S. TO FORM A HIGH AVERAGING 30.4 INCHES THAT WILL  
SPAN THE ATLANTIC COAST SATURDAY NIGHT. ANOTHER WEAK LOW IS  
FORECAST TO MOVE ACROSS THE LAKE EARLY NEXT WEEK.  
 
LMZ261-362-364-366-563-565-567-868-132215-  
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-  
843 AM CST WED DEC 13 2017  
 
SHEBOYGAN WI TO PENTWATER MI NORTH...  
   
REST OF TODAY
 
SOUTHEAST WINDS TO 30 KT BECOMING NORTHEAST.  
SNOW. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9 FT  
OCCASIONALLY TO 12 FT.   
TONIGHT
 
NORTHEAST WINDS TO 30 KT BECOMING NORTHWEST 15 TO 25  
KT LATE. CHANCE OF SNOW. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.    
THURSDAY
 
NORTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO  
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO  
4 FT.    
THURSDAY NIGHT
 
WEST WINDS 10 TO 20 KT. CHANCE OF SNOW. WAVES  
2 TO 4 FT.    
FRIDAY
 
WEST WINDS 15 TO 25 KT BECOMING NORTHWEST TO 30 KT.  
CHANCE OF SNOW. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.    
FRIDAY NIGHT
 
NORTHWEST WINDS TO 30 KT BECOMING NORTH 15 TO  
25 KT. CHANCE OF SNOW. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT  
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.    
SATURDAY
 
NORTHEAST WINDS 10 TO 20 KT VEERING TO SOUTHEAST  
15 TO 25 KT. CHANCE OF SNOW. WAVES 3 TO 5 FT.    
SUNDAY
 
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. CHANCE OF  
SNOW AND RAIN. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.  
 

 
 
LMZ080-669-671-673-675-777-779-870-872-874-876-878-132215-  
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-  
843 AM CST WED DEC 13 2017  
 
SHEBOYGAN WI TO PENTWATER MI SOUTH...  
   
REST OF TODAY
 
SOUTH WINDS TO 30 KT VEERING TO NORTHWEST.  
OCCASIONAL SOUTH GALES TO 35 KT THIS MORNING AND NORTHWEST GALES  
TO 35 KT LATE THIS AFTERNOON. SNOW. WAVES 4 TO 6 FT OCCASIONALLY  
TO 8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.   
TONIGHT
 
NORTH WINDS TO 30 KT EASING TO 15 TO 25 KT LATE.  
OCCASIONAL GALE GUSTS TO 35 KT ARE POSSIBLE EARLY THIS EVENING.  
SNOW LIKELY. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.   
THURSDAY
 
NORTH WINDS 15 TO 25 KT BECOMING NORTHWEST 10 TO  
20 KT. CHANCE OF SNOW. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT  
SUBSIDING TO 2 TO 4 FT.    
THURSDAY NIGHT
 
WEST WINDS 10 TO 20 KT INCREASING TO 15 TO  
25 KT. CHANCE OF FLURRIES IN THE EVENING...THEN CHANCE OF SNOW  
OVERNIGHT. WAVES 3 TO 5 FT.    
FRIDAY
 
WEST WINDS TO 30 KT. CHANCE OF SNOW. WAVES 4 TO 7 FT  
OCCASIONALLY TO 9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.   
FRIDAY NIGHT
 
NORTHWEST WINDS TO 30 KT SUBSIDING TO 10 TO 20 KT  
AFTER MIDNIGHT. CHANCE OF SNOW. WAVES 5 TO 8 FT OCCASIONALLY TO  
10 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.    
SATURDAY
 
NORTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO 25  
KT. WAVES 3 TO 5 FT.    
SUNDAY
 
SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF RAIN AND SNOW.  
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.  
 

 
LMZ761-132215-  
MAFOR 1316/  
MICHIGAN NORTH 11347 11247 12147 12840 12730. CHANCE OF SNOW  
SHOWERS TONIGHT. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET BUILDING  
TO 6 TO 9 FEET OCCASIONALLY TO 12 FEET TODAY. WAVES 6 TO 9 FEET  
OCCASIONALLY TO 12 FEET TONIGHT. WAVES 4 TO 7 FEET OCCASIONALLY TO  
9 FEET THURSDAY MORNING.  
 
MICHIGAN SOUTH 11447 19457 11547 11747 19757 11847 19857 12847  
12837. CHANCE OF SNOW THURSDAY MORNING. WAVES 4 TO 6 FT  
OCCASIONALLY TO 8 FT BUILDING TO 6 TO 9 FEET TODAY AND CONTINUING  
TONIGHT. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 4  
TO 7 FEET OCCASIONALLY TO 9 FEET THURSDAY MORNING.  
 

 
 
BMD  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/LOT/GLFTABLE  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab IL Page
The Nexlab IN Page Main Text Page