Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 240140
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
840 PM 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 30.1 INCHES EXTENDS ACROSS
THE GREAT LAKES TO THE CENTRAL AND SOUTHERN PLAINS. AS THIS RIDGE
SLOWLY SAGS SOUTH TONIGHT...A COLD FRONT WILL CONTINUE TO MOVE
SOUTH ACROSS THE LAKE. LOW PRESSURE OF 29.4 INCHES WILL MOVE FROM
THE NORTHERN PLAINS MONDAY TO LAKE SUPERIOR TUESDAY AND FILL. NEW
LOW PRESSURE OF 29.3 INCHES OVER THE CENTRAL PLAINS TUESDAY WILL
MOVE NORTHEAST TO LAKE MICHIGAN WEDNESDAY AND WEDNESDAY
NIGHT...AND THEN CONTINUE TO THE NORTHEAST THURSDAY.

LMZ261-362-364-366-563-565-567-868-240930-
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-
840 PM CDT SUN APR 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST.
WAVES 2 TO 4 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING EAST. GUSTS OF 25
TO 30 KT POSSIBLE LATE...MAINLY NORTH OF BEAVER ISLAND. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 15 TO
25 KT. GUSTS OF 25 TO 30 KT POSSIBLE IN THE EVENING...MAINLY NORTH
OF BEAVER ISLAND. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN
SHOWERS. WAVES 2 TO 4 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT VEERING TO NORTH. RAIN
SHOWERS LIKELY IN THE MORNING...THEN RAIN SHOWERS IN THE
AFTERNOON. WAVES 2 TO 4 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST.
RAIN SHOWERS LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO
15 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240930-
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-
840 PM CDT SUN APR 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST.
WAVES 2 TO 4 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 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.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH.
WAVES 2 TO 4 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS IN
THE MORNING...THEN RAIN SHOWERS LIKELY IN THE AFTERNOON. WAVES
2 TO 4 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
.FRIDAY...NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ761-240930-
MAFOR 2403/
MICHIGAN NORTH 12120 11220 12320 11330 11230 19240 11230 19240.
WAVES 2 TO 4 FT OVERNIGHT. WAVES BUILDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT MONDAY AND MONDAY EVENING.

MICHIGAN SOUTH 12120 19110 11220 12320 12310 11320. WAVES 2 TO 4
FT.


$$


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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