Great Lakes Forecast
Issued by NWS

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088
FZUS63 KLOT 230755
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
255 AM CDT SUN APR 23 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...HIGH PRESSURE AVERAGING 30.2 INCHES EXTENDS FROM NEW
ENGLAND THROUGH THE SOUTHERN LAKES TO THE SOUTHERN PLAINS. THIS
RIDGE WILL SLOWLY SAG SOUTH AS IT WEAKENS TODAY AND TONIGHT. LOW
PRESSURE OF 29.7 INCHES NEAR JAMES BAY EARLY THIS MORNING WILL
MOVE ACROSS NORTHERN QUEBEC TODAY. A TRAILING COLD FRONT WILL
MOVE SOUTH ACROSS THE LAKE TODAY. LOW PRESSURE OF 29.4 INCHES
WILL MOVE FROM THE NORTHERN PLAINS MONDAY TO LAKE SUPERIOR
TUESDAY AND FILL. LOW PRESSURE OF 29.4 INCHES OVER THE CENTRAL
PLAINS TUESDAY WILL MOVE NORTHEAST TO LAKE MICHIGAN WEDNESDAY.

LMZ261-362-364-366-563-565-567-669-868-870-231400-
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 SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
255 AM CDT SUN APR 23 2017

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

.TODAY...SOUTHWEST WINDS 10 TO 20 KT SHIFTING NORTHEAST 15 TO 20
KT THIS MORNING. WAVES 2 TO 4 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES 2 TO
4 FT.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY NIGHT...SOUTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO 25
KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
.WEDNESDAY...EAST WINDS 15 TO 25 KT BECOMING NORTHEAST TO 30 KT
IN THE AFTERNOON. RAIN SHOWERS LIKELY. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.THURSDAY...WEST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ080-671-673-675-777-779-872-874-876-878-231400-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
255 AM CDT SUN APR 23 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.TODAY...SOUTHWEST WINDS 10 TO 15 KT SHIFTING NORTHEAST 10 TO 20
KT THIS AFTERNOON. WAVES 1 TO 3 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST 10 TO 15 KT.
WAVES 2 TO 4 FT.
.MONDAY...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 10 TO 15 KT.
WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 2 TO 4 FT.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...SOUTH WINDS INCREASING TO 30 KT IN THE AFTERNOON.
RAIN SHOWERS LIKELY. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY...WEST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT IN
THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ761-231400-
MAFOR 2309/
MICHIGAN NORTH 10520 11620 19820 11820 15120. WAVES 2 TO 4 FT.

MICHIGAN SOUTH 13510 11510 19120 12120 11110 11210. WAVES 1 TO
3 FT TODAY AND 2 TO 4 FT TONIGHT.

$$

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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