Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 050150
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
850 PM CDT SAT JUL 4 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....A BROAD 30.0 INCH HIGH CENTERED OVER THE CENTRAL
GREAT LAKES WILL SHIFT EAST THROUGH SUNDAY. A 29.6 INCH LOW OVER
MANITOBA WILL DEEPEN AND MOVE OVER HUDSON BAY SUNDAY EVENING WITH
A SECONDARY LOW OF 29.6 INCHES FORMING ALONG ITS COLD FRONT OVER
THE CENTRAL PLAINS. THE SECONDARY LOW WILL DEEPEN TO 29.5 INCHES
AS IT REACHES LAKE SUPERIOR MONDAY EVENING. THE MAIN LOWS COLD
FRONT SWINGS OVER THE LAKE LATE MONDAY NIGHT AS THE SECONDARY LOW
MOVES OVER QUEBEC. A 30.1 INCH HIGH SPREADS OVER THE LAKE TUESDAY
EVENING AND THE LARGER HIGH PRESSURE RIDGE SITS OVER THE LAKE
THROUGH LATE THIS WEEK. A LOW PRESSURE SYSTEM AVERAGING 29.9
INCHES PASSES SOUTH OF THE LAKE ACROSS CENTRAL ILLINOIS AND
INDIANA MID WEEK.

LMZ261-362-364-366-563-565-567-868-050930-
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-
850 PM CDT SAT JUL 4 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...SOUTH WINDS 5 TO 10 KT. WAVES AROUND 1 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT BY
LATE IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FT.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY NIGHT...SOUTHWEST WINDS TO 30 KT BECOMING WEST 15 TO
25 KT. SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN SHOWERS
AND THUNDERSTORMS LIKELY OVERNIGHT. WAVES 5 TO 8 FT OCCASIONALLY
TO 10 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 5 TO 10 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.TUESDAY NIGHT...NORTH WINDS 5 TO 10 KT BECOMING VARIABLE. WAVES
1 TO 2 FT.
.WEDNESDAY...VARIABLE WINDS 5 TO 10 KT BECOMING SOUTHWEST IN THE
AFTERNOON. WAVES 1 FT OR LESS.
.THURSDAY...SOUTH WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-050930-
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-
850 PM CDT SAT JUL 4 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...SOUTH WINDS 5 TO 10 KT. WAVES AROUND 1 FT.
.SUNDAY...SOUTH WINDS 5 TO 10 KT BECOMING SOUTHEAST 10 TO 15 KT
IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. WAVES
1 TO 3 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING WEST 10 TO 20 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN SHOWERS
AND THUNDERSTORMS LIKELY OVERNIGHT. WAVES 4 TO 6 GT OCCASIONALLY
TO 8 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING. WAVES 2 TO 4 FT.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
.WEDNESDAY...NORTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
.THURSDAY...SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH. WAVES 1 FT
OR LESS.

$$
LMZ761-050930-
MAFOR 0503/
MICHIGAN NORTH 13400 14410 11420. WAVES AROUND 1 FT TONIGHT
BUILDING TO 2 TO 4 FT DURING SUNDAY.

MICHIGAN SOUTH 14400 11400 12310 11320. WAVES 1 TO 3 FT.

$$

MTF



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