Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 161941
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
241 PM CDT TUE MAY 16 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 29.5 INCHES IS CENTERED OVER THE
NORTHERN PLAINS THIS AFTERNOON AND WILL MOVE TO JAMES BAY MIDDAY
TOMORROW. ANOTHER LOW OF 29.2 INCHES WILL FORM OVER THE CENTRAL
PLAINS TONIGHT AND LIFT TO NORTHERN LAKE MICHIGAN THURSDAY FILLING
TO 29.6 INCHES. HIGH PRESSURE OF 30.3 INCHES WILL BUILD OVER THE
CANADIAN PRAIRIES THURSDAY TO QUEBEC BY SATURDAY.
MEANWHILE...ANOTHER LOW OF 29.9 INCHES WILL FORM OVER THE CENTRAL
PLAINS SATURDAY AND LIFT ACROSS LAKE MICHIGAN SUNDAY.

LMZ261-362-364-366-563-565-567-868-170315-
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-
241 PM CDT TUE MAY 16 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
SLIGHT CHANCE OF RAIN SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. SLIGHT
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT.
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.THURSDAY...SOUTHWEST WINDS TO 30 KT VEERING TO NORTHWEST. CHANCE
OF RAIN SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN CHANCE OF
RAIN SHOWERS IN THE AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.SATURDAY...EAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. CHANCE OF
RAIN SHOWERS. WAVES 2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-170315-
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-
241 PM CDT TUE MAY 16 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...SOUTH WINDS 15 TO 25 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.THURSDAY...SOUTH WINDS TO 30 KT BECOMING WEST. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT BECOMING NORTH 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS. WAVES
1 TO 3 FT.

$$

LMZ761-170315-
MAFOR 1621/
MICHIGAN NORTH 10310 12420 15430. CHANCE OF SHOWERS AND
THUNDERSTORMS WEDNESDAY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.

MICHIGAN SOUTH 16430. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

BMD

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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