Great Lakes Forecast
Issued by NWS

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461
FZUS63 KLOT 230751
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
251 AM CDT TUE AUG 23 2016

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...HIGH PRESSURE AROUND 30.3 INCHES WILL CONTINUE TO
DOMINATE ACROSS THE ATLANTIC COAST THROUGH WEDNESDAY.
MEANWHILE...LOW PRESSURE NEAR 29.5 INCHES OVER THE DAKOTAS THIS
MORNING WILL GRADUALLY SHIFT EAST NORTHEASTWARD OVER EASTERN
ONTARIO BY EARLY THURSDAY MORNING. AN ASSOCIATED COLD FRONT WILL
THEN SWEEP ACROSS LAKE MICHIGAN BY THURSDAY MORNING. ANOTHER HIGH
AROUND 30.2 INCHES IS THEN FORECAST TO BUILD OVER THE WESTERN
LAKES REGION BY FRIDAY EVENING.

LMZ261-362-364-366-563-565-567-868-231530-
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-
251 AM CDT TUE AUG 23 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...SOUTHWEST WINDS TO 30 KT BECOMING SOUTH. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.TONIGHT...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO 25 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING... THEN
SHOWERS AND THUNDERSTORMS LIKELY IN THE AFTERNOON. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST
10 TO 15 KT. CHANCE OF SHOWERS IN THE EVENING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.THURSDAY...WEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
20 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 5 TO 10 KT
IN THE AFTERNOON. WAVES SUBSIDING TO 1 TO 2 FT.
.SATURDAY...SOUTHEAST WINDS 5 TO 10 KT. WAVES AROUND 1 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231530-
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-
251 AM CDT TUE AUG 23 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...SOUTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO 25 KT.
SHOWERS AND THUNDERSTORMS LIKELY IN THE MORNING...THEN CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST
10 TO 15 KT. SHOWERS AND THUNDERSTORMS LIKELY IN THE EVENING...
THEN CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 3 FT.
.THURSDAY...WEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
20 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 10 TO 15 KT.
WAVES 2 TO 4 FT.
.SATURDAY...SOUTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.

$$

LMZ761-231530-
MAFOR 2309/
MICHIGAN NORTH 14540 11440 13430. WAVES 5 TO 8 FT OCCASIONALLY TO
10 FT TODAY. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4
TO 6 FT OCCASIONALLY TO 8 FT TONIGHT.

MICHIGAN SOUTH 12530 15430. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
TODAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT TONIGHT.

$$


KJB

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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