Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 240143
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
843 PM CDT THU APR 23 2015

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 HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG
WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES
WHICH WILL OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...LOW PRESSURE OF 29.4 INCHES OVER SOUTHEAST QUEBEC WILL
MOVE OFF OF THE ATLANTIC COAST OVERNIGHT...WHILE A BROAD AREA OF
HIGH PRESSURE AVERAGING 30.1 INCHES WILL SPREAD ACROSS THE WESTERN
GREAT LAKES. THE RIDGE WILL CONTINUE TO DRIFT EAST ACROSS THE
CENTRAL LAKES FRIDAY...WHILE LOW PRESSURE OF 29.4 INCHES DEVELOPS
ACROSS THE CENTRAL PLAINS. THIS LOW WILL MOVE TO THE LOWER OHIO
VALLEY BY SATURDAY EVENING WHILE FILLING A BIT TO 29.5 INCHES.
HIGH PRESSURE AVERAGING 30.2 INCHES WILL THEN MOVE SLOWLY OVER
THE WESTERN LAKES DURING THE FIRST HALF OF NEXT WEEK.

LMZ261-362-240930-
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-
843 PM CDT THU APR 23 2015

ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KT BECOMING WEST
10 TO 15 KT. WAVES 2 TO 4 FT.
.FRIDAY...WEST WINDS 5 TO 10 KT BECOMING VARIABLE IN THE
AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...VARIABLE WINDS 5 TO 10 KT BECOMING NORTHEAST AND
INCREASING TO 10 TO 20 KT IN THE EVENING. WAVES BUILDING TO 2 TO
4 FT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN IN THE
AFTERNOON. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
.SUNDAY NIGHT...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 2 TO 4 FT.
.MONDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ364-366-563-565-240930-
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-
843 PM CDT THU APR 23 2015

ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO TWO RIVERS WI TO
MANISTEE MI

.REST OF TONIGHT...SOUTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
.FRIDAY...VARIABLE WINDS 5 TO 10 KT BECOMING SOUTHEAST IN THE
AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...EAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN IN THE
AFTERNOON. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
.SUNDAY NIGHT...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 2 TO 4 FT.
.MONDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-240930-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM 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 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 PENTWATER TO MANISTEE MI 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-
843 PM CDT THU APR 23 2015

TWO RIVERS WI TO MANISTEE MI SOUTH

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 10 KT BECOMING VARIABLE.
WAVES 1 TO 2 FT.
.FRIDAY...VARIABLE WINDS 5 TO 10 KT BECOMING EAST EARLY...AND
INCREASING TO 10 TO 15 KT IN THE AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 20 KT BECOMING EAST 15 TO
25 KT AFTER MIDNIGHT. CHANCE OF RAIN OVERNIGHT. WAVES 2 TO 4 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT BECOMING NORTHEAST TO 30 KT IN
THE AFTERNOON. RAIN LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT IN THE
AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...NORTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.TUESDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$
LMZ761-240930-
MAFOR 2404/
MICHIGAN NORTH 12410 19910 11410 12500 11510 11310 11110. WAVES 2
TO 4 FT SUBSIDING TO 1 TO 3 FT OVERNIGHT. WAVES 1 TO 3 FT FRIDAY
AND FRIDAY EVENING.

MICHIGAN SOUTH 11500 12900 11200 12210 12120. WAVES 1 TO 3 FT.

$$

RATZER


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