Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 220754
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
254 AM CDT SAT AUG 22 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 TODAY. 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 AS 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.

LMZ261-362-364-366-563-565-567-868-221530-
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-
254 AM CDT SAT AUG 22 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TODAY...SOUTHWEST WINDS 15 TO 20 KT BECOMING SOUTH 20 TO 25 KT
THIS AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO
4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTH WINDS 20 TO 25 KT INCREASING TO 30 KT. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY
TO 10 FT.
.SUNDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST EARLY IN THE
AFTERNOON...THEN WEST LATE. GALE FORCE GUSTS TO 35 KT POSSIBLE IN
THE MORNING. SHOWERS IN THE MORNING...THEN CHANCE OF SHOWERS IN
THE AFTERNOON. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING
TO 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 DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221530-
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-
254 AM CDT SAT AUG 22 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TODAY...SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TONIGHT...SOUTH WINDS 10 TO 20 KT INCREASING TO 30 KT LATE.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 2 TO 4
FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY...SOUTH WINDS TO 30 KT VEERING TO WEST 15 TO 25 KT.
SHOWERS IN THE MORNING...THEN CHANCE OF SHOWERS IN THE AFTERNOON.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS 15 TO 25 KT. CHANCE OF SHOWERS. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES
1 TO 2 FT.

$$

LMZ761-221530-
MAFOR 2209/
MICHIGAN NORTH 12520 11420 14430 11440. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
TODAY...THEN TO 5 TO 8 FT OCCASIONALLY TO 10 FT TONIGHT.

MICHIGAN SOUTH 15420 11420 11430 19440. WAVES 2 TO 4 FT TODAY.
WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TONIGHT.

$$


KJB



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