Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 250753
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
253 AM CDT TUE APR 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...A TROUGH OF LOW PRESSURE AVERAGING 29.5 INCHES...
WILL MOVE FROM THE NORTHERN PLAINS TO LAKE SUPERIOR TODAY WHILE
FILLING. NEW LOW PRESSURE OF 29.2 INCHES OVER THE CENTRAL PLAINS
WILL MOVE NORTHEAST TO LAKE MICHIGAN WEDNESDAY AND WEDNESDAY
NIGHT...AND THEN CONTINUE INTO ONTARIO THURSDAY. THIS LOW WILL
SLOWLY LIFT THROUGH SOUTHEAST CANADA FRIDAY AND FRIDAY NIGHT...
WHILE A NEW TROUGH OF LOW PRESSURE DEVELOPS ACROSS THE CENTRAL
PLAINS.

LMZ261-362-364-366-563-565-567-868-251400-
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-
253 AM CDT TUE APR 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...SOUTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH. CHANCE
OF RAIN SHOWERS IN THE MORNING...THEN RAIN SHOWERS LIKELY IN THE
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHEAST.
RAIN SHOWERS LIKELY. CHANCE OF THUNDERSTORMS IN THE EVENING.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST TO 30 KT.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT SHIFTING NORTHEAST FRIDAY
NIGHT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
.SATURDAY...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-251400-
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-
253 AM CDT TUE APR 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...SOUTHEAST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KT. SLIGHT CHANCE OF SHOWERS
OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH. CHANCE
OF RAIN SHOWERS. CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT. RAIN SHOWERS AND
THUNDERSTORMS LIKELY IN THE EVENING...THEN RAIN SHOWERS LIKELY
OVERNIGHT. WAVES 2 TO 4 FT.
.THURSDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. CHANCE
OF RAIN SHOWERS. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.FRIDAY...SOUTH WINDS 10 TO 15 KT SHIFTING NORTHEAST 10 TO 20 KT
FRIDAY NIGHT. CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT.
.SATURDAY...NORTH WINDS TO 30 KT BECOMING NORTHEAST. CHANCE OF
RAIN SHOWERS. WAVES 5 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ761-251400-
MAFOR 2509/
MICHIGAN NORTH 13330 12320 12220 11230. CHANCE OF RAIN SHOWERS
TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.

MICHIGAN SOUTH 16330. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

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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