Great Lakes Forecast
Issued by NWS

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520
FZUS63 KLOT 270154
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
854 PM CDT FRI AUG 26 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...WEAK HIGH PRESSURE OF 30.2 INCHES OVER THE WESTERN
LAKES WILL MOVE EAST TO NEW ENGLAND OVERNIGHT. DEVELOPING LOW
PRESSURE OVER THE NORTHERN CANADIAN ROCKIES WILL WILL MOVE TO
NORTH CENTRAL CANADA INTO SUNDAY AT 29.6 INCHES. HIGH PRESSURE OF
30.2 INCHES WILL THEN SPREAD ACROSS THE GREAT LAKES EARLY NEXT
WEEK AS THE CANADIAN LOW CONTINUES EAST TO NORTHEAST QUEBEC
WEDNESDAY. THIS LOW WILL SEND A COLD FRONT ACROSS THE NORTHERN
HALF OF THE LAKE MID WEEK.

LMZ261-362-364-366-563-565-567-868-270915-
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-
854 PM CDT FRI AUG 26 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...VARIABLE WINDS 5 TO 10 KT BECOMING SOUTHEAST.
CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 1 FT OR LESS.
.SATURDAY...SOUTHEAST WINDS 10 TO 15 KT BECOMING EAST 10 TO
20 KT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING... THEN
SHOWERS AND THUNDERSTORMS LIKELY IN THE AFTERNOON. WAVES 1 TO
3 FT.
.SATURDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT VEERING TO WEST
10 TO 15 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO
3 FT.
.SUNDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST. WAVES 1 TO
2 FT.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
.MONDAY...SOUTH WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 15 KT.
WAVES 1 TO 2 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KT. CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.TUESDAY...WEST WINDS 5 TO 10 KT BECOMING NORTHWEST 10 TO 15 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 2 FT.
.WEDNESDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270915-
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-
854 PM CDT FRI AUG 26 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 15 KT BECOMING EAST AND
INCREASING TO 10 TO 20 KT. SHOWERS AND THUNDERSTORMS BECOMING
LIKELY AFTER MIDNIGHT. WAVES 1 TO 2 FT.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. SHOWERS
AND THUNDERSTORMS LIKELY IN THE MORNING...THEN CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.SUNDAY...WEST WINDS 5 TO 10 KT BACKING TO SOUTH. WAVES 1 TO
2 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
.MONDAY...SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH. WAVES 1 FT
OR LESS.
.MONDAY NIGHT...SOUTH WINDS 5 TO 10 KT BECOMING SOUTHWEST. CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES 1 FT OR LESS.
.TUESDAY...SOUTHWEST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
.WEDNESDAY...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH 10 TO
20 KT. WAVES 1 TO 2 FT.

$$
LMZ761-270915-
MAFOR 2703/
MICHIGAN NORTH 11900 11210 11310 11319 13219 11320. CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT AND SATURDAY EVENING.
WAVES 1 TO 3 FT.

MICHIGAN SOUTH 13210 12329 11420 11410 11420. SHOWERS AND
THUNDERSTORMS LIKELY AFTER MIDNIGHT TONIGHT AND SATURDAY MORNING.
CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON AND EVENING. WAVES 1
TO 3 FT.

$$

RATZER

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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