Great Lakes Forecast
Issued by NWS

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350
FZUS63 KLOT 251355
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
855 AM CDT THU MAY 25 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 IN WESTERN OHIO WILL
SLOWLY MOVE TO THE EASTERN LAKES BY THIS EVENING AND THEN
ACCELERATE OFF THE SHORE OF NEW ENGLAND BY FRIDAY MORNING. A WEAK
RIDGE OF HIGH PRESSURE AVERAGING 29.9 INCHES WILL THEN TRACK
ACROSS THE LAKE ON FRIDAY AND SATURDAY. A TROUGH OF LOW PRESSURE
AVERAGING 29.7 INCHES WILL DEVELOP ACROSS THE CENTRAL PLAINS AND
MID MISSISSIPPI VALLEY SATURDAY AND SATURDAY NIGHT AND THEN MOVE
TO THE CENTRAL LAKES BY EARLY SUNDAY MORNING...AND THEN MOVE TO
THE EASTERN LAKES SUNDAY NIGHT. MEANWHILE...ANOTHER LOW AVERAGING
29.6 INCHES WILL DEVELOP OVER ONTARIO ON SATURDAY AND SLOWLY MOVE
TOWARD WESTERN QUEBEC BY MONDAY AFTERNOON.

LMZ261-362-364-366-563-565-567-868-252130-
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-
855 AM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT...THEN BECOMING NORTHEAST 10 TO 20 KT LATE. SLIGHT CHANCE
OF SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH 5 TO 10 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.FRIDAY...NORTH WINDS 5 TO 10 KT BACKING TO SOUTHWEST. WAVES 1 TO
2 FT.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
.SATURDAY...SOUTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 FT OR LESS.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT BACKING TO NORTHEAST.
WAVES 1 FT OR LESS.
.SUNDAY...SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. CHANCE OF
SHOWERS. WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-252130-
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-
855 AM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...NORTH WINDS 5 TO 10 KT BECOMING EAST. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...EAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS IN THE
EVENING. WAVES 1 TO 2 FT.
.SATURDAY...NORTHEAST WINDS 5 TO 10 KT BECOMING NORTH. WAVES 1 FT
OR LESS.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTHWEST.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 FT OR LESS.
.SUNDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES 1 TO
2 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. CHANCE OF
SHOWERS. WAVES 1 TO 3 FT.

$$

LMZ761-252130-
MAFOR 2515/
MICHIGAN NORTH 11830 11130 12120 12810 11800 11200. WAVES 3 TO 6
FT OCCASIONALLY 8 FT. WAVES SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES
1 FOOT OR LESS FRIDAY MORNING.

MICHIGAN SOUTH 12830 12820 11720 11710 11810 11200. WAVES 4 TO 7
FT OCCASIONALLY TO 9 FT TODAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 2 TO 4 FT FRIDAY MORNING.

$$

MM

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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