Great Lakes Forecast
Issued by NWS

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950
FZUS63 KLOT 251950
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
250 PM 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 29.4 INCHES OVER THE UPPER OHIO VALLEY
WILL MOVE TO NEW ENGLAND FRIDAY. A WEAK RIDGE AVERAGING 29.8
INCHES WILL MOVE FROM THE MISSISSIPPI VALLEY THIS AFTERNOON TO
LAKE MICHIGAN FRIDAY...THEN TO THE EASTERN LAKES SATURDAY. LOW
PRESSURE OF 29.7 INCHES WILL DEVELOP OVER THE SOUTHERN PLAINS
SATURDAY AND LIFT TO MICHIGAN EARLY SUNDAY. MEANWHILE...ANOTHER
LOW OF 29.4 INCHES WILL MOVE EAST ACROSS THE CANADIAN PRAIRIES
OVER THE WEEKEND. THE TWO LOWS WILL MERGE OVER ONTARIO LATE SUNDAY
THEN SLOWLY LIFT TO JAMES BAY TUESDAY.

LMZ261-362-364-366-563-565-567-868-260315-
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-
250 PM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT.
SLIGHT CHANCE OF RAIN SHOWERS THIS EVENING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...VARIABLE WINDS 5 TO 10 KT. SLIGHT CHANCE OF RAIN
SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 10 KT BACKING TO EAST. WAVES
1 FT OR LESS.
.SATURDAY...SOUTH WINDS 5 TO 10 KT BECOMING SOUTHWEST. WAVES 1 FT
OR LESS.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 1 FT OR LESS.
.SUNDAY...SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
CHANCE OF RAIN SHOWERS. WAVES 1 TO 2 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES
1 TO 3 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS. WAVES 2 TO 4 FT.
.TUESDAY...WEST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS. WAVES
2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-260315-
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-
250 PM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15
KT. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...VARIABLE WINDS 5 TO 10 KT BECOMING EAST 10 TO 15 KT.
CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF SHOWERS IN THE EVENING. WAVES 1 TO 3 FT.
.SATURDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 FT OR LESS.
.SATURDAY NIGHT...EAST WINDS 5 TO 10 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 1 FT OR LESS.
.SUNDAY...NORTH WINDS 10 TO 15 KT BECOMING WEST. CHANCE OF
SHOWERS. WAVES 1 TO 2 FT.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.MONDAY...WEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS. WAVES 2 TO
4 FT.
.TUESDAY...WEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.

$$

LMZ761-260315-
MAFOR 2521/
MICHIGAN NORTH 12820 12810 11800 13900. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 1 TO 3
FT FRIDAY.

MICHIGAN SOUTH 13720 12710 12900 11210. CHANCE OF SHOWERS FRIDAY.
WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT
TONIGHT. WAVES 1 TO 3 FT FRIDAY.

$$

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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