Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 220148
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
848 PM CDT FRI AUG 21 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...LARGE HIGH PRESSURE OF 30.1 INCHES CENTERED OVER THE
EASTERN LAKES...WILL SLOWLY MOVE EAST TONIGHT AND SATURDAY. LOW
PRESSURE OF 29.5 INCHES OVER THE WESTERN DAKOTAS...WILL MOVE
NORTHEAST TO WESTERN ONTARIO SATURDAY EVENING AS IT DEEPENS TO
29.2 INCHES. THIS LOW WILL THEN BEGIN TO WEAKEN AT IT SLOWLY
MOVES ACROSS CENTRAL ONTARIO SUNDAY AND SUNDAY NIGHT. A TRAILING
COLD FRONT WILL MOVE ACROSS THE LAKE SUNDAY...QUICKLY SHIFTING
WINDS FROM GENERALLY SOUTHERLY TO WESTERLY. HIGH PRESSURE OF
30.1 INCHES WILL BUILD ACROSS THE PLAINS SUNDAY AND ACROSS THE
MIDDLE MISSISSIPPI AND UPPER OHIO VALLEYS MONDAY.

LMZ261-362-364-366-563-565-567-868-220800-
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-
848 PM CDT FRI AUG 21 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST
10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH TO 30 KT.
WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY NIGHT...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS IN THE MORNING...THEN CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY NIGHT...WEST WINDS TO 30 KT. CHANCE OF SHOWERS OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. CHANCE
OF SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SHOWERS.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS. WAVES
2 TO 4 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 5 TO
10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220800-
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-
848 PM CDT FRI AUG 21 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST
10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO
2 TO 4 FT.
.SATURDAY...SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25
KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SUNDAY...SOUTH WINDS 15 TO 25 KT BECOMING WEST. SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS IN THE MORNING...THEN CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. CHANCE
OF SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.WEDNESDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 TO 2 FT.

$$
LMZ761-220800-
MAFOR 2203/
MICHIGAN NORTH 11430 11530 12520 12430 11440 11430. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT SATURDAY.

MICHIGAN SOUTH 11430 12520 11420 14420. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT OVERNIGHT. WAVES 2
TO 4 FT SATURDAY.

$$


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