Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 250134
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
834 PM CDT MON APR 24 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 RIDGE OF HIGH PRESSURE AVERAGING 30.1 INCHES OVER
SOUTHEAST CANADA AND THE GREAT LAKES WILL LIFT TO THE NORTHEAST
TONIGHT...WHILE A TROUGH OF LOW PRESSURE AVERAGING 29.5 INCHES
MOVES FROM THE NORTHERN PLAINS TO LAKE SUPERIOR TUESDAY WHILE
FILLING. NEW LOW PRESSURE OF 29.2 INCHES OVER THE CENTRAL PLAINS
TUESDAY WILL MOVE NORTHEAST TO LAKE MICHIGAN WEDNESDAY AND
WEDNESDAY NIGHT...AND THEN CONTINUE TO THE NORTHEAST 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.

LMZ261-362-364-366-563-565-567-868-250930-
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-
834 PM CDT MON APR 24 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST.
WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING EAST 10 TO 20 KT
LATE. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4
FT.
.TUESDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT BUILDING TO 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 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING EAST
15 TO 25 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS
IN THE EVENING...THEN RAIN SHOWERS LIKELY OVERNIGHT. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KT VEERING TO SOUTHWEST
10 TO 20 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH. WAVES 1 TO
3 FT.
.SATURDAY...NORTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250930-
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-
834 PM CDT MON APR 24 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 15 TO
25 KT OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS IN
THE MORNING...THEN CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN
THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 10 TO 20 KT INCREASING TO 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...WEST WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO
20 KT. WAVES 2 TO 4 FT.
.FRIDAY...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHEAST 10 TO 20 KT.
CHANCE OF RAIN SHOWERS. WAVES 1 TO 2 FT.
.SATURDAY...NORTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ761-250930-
MAFOR 2503/
MICHIGAN NORTH 11230 14330 13220. CHANCE OF SHOWERS TUESDAY
EVENING. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT OVERNIGHT. WAVES 3
TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT TUESDAY AND
TUESDAY EVENING.

MICHIGAN SOUTH 11220 14330 13320. WAVES 2 TO 4 FT BUILDING TO 3
TO 5 FT OCCASIONALLY TO 7 FT OVERNIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TUESDAY AND TUESDAY
EVENING.

$$


KJB

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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