Great Lakes Forecast
Issued by NWS

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272
FZUS63 KLOT 241358
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
858 AM CDT WED AUG 24 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 CENTERED OVER THE MID
ATLANTIC COAST WILL CONTINUE TO VERY SLOWLY SLIDE EAST OFF THE
COAST WHILE RIDGING EXTENDS SOUTHWEST THROUGH THE LOWER
MISSISSIPPI VALLEY. MEANWHILE...LOW PRESSURE OF 29.5 INCHES OVER
SOUTHERN MANITOBA WILL GRADUALLY TRACK TO WESTERN QUEBEC BY
THURSDAY MORNING. AN ASSOCIATED COLD FRONT WILL THEN SWEEP ACROSS
LAKE MICHIGAN WEDNESDAY NIGHT. ANOTHER HIGH AROUND 30.2 INCHES IS
THEN FORECAST TO BUILD OVER THE WESTERN LAKES REGION BY FRIDAY
EVENING.

LMZ261-362-364-366-563-565-567-669-671-868-870-872-242115-
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 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 PENTWATER TO MANISTEE MI 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-
858 AM CDT WED AUG 24 2016

NORTH POINT LIGHT WI TO GRAND HAVEN MI NORTH...

.REST OF TODAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. SHOWERS AND THUNDERSTORMS LIKELY THIS MORNING...THEN
CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON. WAVES 5 TO
8 FT OCCASIONALLY TO 10 FT.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT
LATE IN THE EVENING...THEN BECOMING WEST 10 TO 15 KT AFTER
MIDNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING...THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...WEST WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 15 KT.
WAVES 2 TO 4 FT.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
25 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 5 TO 10 KT BECOMING EAST. WAVES
1 TO 2 FT.
.SATURDAY...SOUTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 1 TO 3 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.

$$

LMZ080-673-675-777-779-874-876-878-242115-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
858 AM CDT WED AUG 24 2016

NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...

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

$$
LMZ761-242115-
MAFOR 2415/
MICHIGAN NORTH 12449 12530 11520 12610 11600. CHANCE OF SHOWERS
AND THUNDERSTORMS TONIGHT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
TODAY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5
FT OCCASIONALLY TO 7 FT TONIGHT. WAVES 2 TO 4 FT THURSDAY
MORNING.

MICHIGAN SOUTH 11449 11430 11530 11520 12510 11600 11610. CHANCE
OF SHOWERS AND THUNDERSTORMS TODAY...TONIGHT...AND THURSDAY
MORNING. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT TODAY SUBSIDING TO 3
TO 5 FT OCCASIONALLY TO 7 FT TONIGHT. WAVES 2 TO 4 FT THURSDAY
MORNING.

$$

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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