Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 260142
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
842 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 MID ATLANTIC
WILL MOVE NORTHEAST TO NEW ENGLAND FRIDAY. A WEAK RIDGE AVERAGING
29.8 INCHES WILL MOVE ACROSS LAKE MICHIGAN FRIDAY MORNING. A WEAK
LOW OF 29.7 INCHES WILL MOVE ACROSS THE SOUTHERN LAKES REGION
FRIDAY NIGHT AND TO THE MID ATLANTIC REGION SATURDAY. ANOTHER 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.

LMZ261-362-364-366-563-565-567-868-260800-
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-
842 PM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. PATCHY FOG. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
.FRIDAY...VARIABLE WINDS 5 TO 10 KT BECOMING SOUTH IN THE
AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
1 FT OR LESS.
.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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-260800-
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-
842 PM CDT THU MAY 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF 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...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 RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
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.

$$
LMZ761-260800-
MAFOR 2603/
MICHIGAN NORTH 11810 12800 13900 12400. PATCHY FOG TONIGHT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT TONIGHT. WAVES 1 FT OR
LESS FRIDAY AND FRIDAY EVENING.

MICHIGAN SOUTH 11820 12810 12900 12210 11120. CHANCE OF RAIN
SHOWERS FRIDAY AFTERNOON AND FRIDAY EVENING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 1 TO
3 FT FRIDAY AND FRIDAY EVENING.

$$

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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