Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 240156 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
856 PM CDT SUN AUG 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...STRONG LOW PRESSURE OF 29.4 INCHES IN WESTERN ONTARIO
WILL MOVE SLOWLY EAST AND VERY GRADUALLY WEAKEN TO 29.5 INCHES
OVER CENTRAL ONTARIO BY MONDAY EVENING. THE LOW IS EXPECTED TO
REACH JAMES BAY BY TUESDAY AFTERNOON WHILE WEAKENING FURTHER TO
29.7 INCHES. HIGH PRESSURE OF 30.1 INCHES OVER THE NORTHERN AND
CENTRAL PLAINS WILL BUILD EAST ACROSS THE MIDDLE MISSISSIPPI AND
UPPER OHIO VALLEY MONDAY NIGHT AND TUESDAY. THE CANADIAN LOW WILL
CONTINUE TO SLOWLY LIFT TO THE NORTHEAST THROUGH MIDWEEK AS HIGH
PRESSURE BUILDS ACROSS THE WESTERN GREAT LAKES. HIGH PRESSURE WILL
PREVAIL ACROSS THE GREAT LAKES REGION THROUGH THE REST OF THE
WEEK.

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-
856 PM CDT SUN AUG 23 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...WEST WINDS TO 30 KT. OCCASIONAL GALE FORCE
GUSTS EARLY. CHANCE OF SHOWERS. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT.
.MONDAY...WEST WINDS TO 30 KT. SCATTERED SHOWERS WITH A CHANCE OF
THUNDERSTORMS. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST 15 TO
25 KT. SCATTERED SHOWERS WITH A CHANCE OF THUNDERSTORMS. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT. SCATTERED SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. SCATTERED SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO
20 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
SUBSIDING TO 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
2 TO 4 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 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-
856 PM CDT SUN AUG 23 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...WEST WINDS 20 TO 25 KT INCREASING TO 30 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...WEST WINDS TO 30 KT. A FEW GALE FORCE GUSTS POSSIBLE.
ISOLATED SHOWERS IN THE MORNING...THEN SCATTERED SHOWERS IN THE
AFTERNOON. WAVES BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT.
.MONDAY NIGHT...NORTHWEST WINDS TO 30 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.TUESDAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT IN
THE AFTERNOON. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT
SUBSIDING TO 1 TO 2 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 TO 3 FT.
.FRIDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.

$$
LMZ761-240930-
MAFOR 2403/
MICHIGAN NORTH 11640 19650 15640 11640. CHANCE OF SHOWERS
TONIGHT. SCATTERED SHOWERS WITH A CHANCE OF THUNDERSTORMS MONDAY
AND MONDAY EVENING. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT TONIGHT
AND MONDAY AND 5 TO 8 FT OCCASIONALLY TO 10 FT MONDAY EVENING.

MICHIGAN SOUTH 12630 12640 12640 19640 11640 11740. SCATTERED
SHOWERS MONDAY AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
TONIGHT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT MONDAY. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT MONDAY EVENING.

$$

RC


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