Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 250141
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
841 PM CDT SAT SEP 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 OF 30.3 INCHES ACROSS EASTERN ONTARIO
WILL MOVE EAST OVERNIGHT INTO SUNDAY. LOW PRESSURE OF 29.7 INCHES
OVER NORTH DAKOTA WILL MOVE TO LAKE SUPERIOR MONDAY AND THEN
SLOWLY MOVE TO LAKE HURON TUESDAY NIGHT INTO WEDNESDAY. AN
ASSOCIATED STRONG COLD FRONT WILL MOVE ACROSS THE LAKE SUNDAY
NIGHT. A RIDGE OF HIGH PRESSURE AVERAGING 30.3 INCHES WILL BUILD
ACROSS PORTIONS OF THE MID AND UPPER MISSISSIPPI VALLEY MIDWEEK.


LMZ261-362-364-366-563-565-567-868-250930-
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-
841 PM CDT SAT SEP 24 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST AFTER
MIDNIGHT AND INCREASING TO 15 TO 25 KT LATE. WAVES 2 TO 4 FT
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT LATE.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT BY LATE
MORNING. CHANCE OF SHOWERS LATE IN THE MORNING AND EARLY IN THE
AFTERNOON...THEN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS
LATE IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...SOUTH WINDS TO 30 KT VEERING TO WEST AFTER
MIDNIGHT. SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT. A FEW GALE FORCE GUSTS TO 35 KT
POSSIBLE. CHANCE OF SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.TUESDAY...NORTHWEST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF SHOWERS. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 FT OR LESS.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250930-
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-
841 PM CDT SAT SEP 24 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST
15 TO 25 KT AFTER MIDNIGHT. WAVES 2 TO 4 FT.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KT. SLIGHT CHANCE OF SHOWERS
IN THE MORNING...THEN CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7
FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT VEERING TO WEST TO 30 KT
AFTER MIDNIGHT. SHOWERS AND A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT. A FEW GALE FORCE GUSTS TO 35
KT POSSIBLE. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY...WEST WINDS TO 30 KT BECOMING NORTHWEST 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
SUBSIDING TO 2 TO 4 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH. WAVES
2 TO 4 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 TO 2 FT.

$$
LMZ761-250930-
MAFOR 2503/
MICHIGAN NORTH 11220 11320 12330 12340 11346 11446. CHANCE OF
SHOWERS LATE MORNING AND EARLY AFTERNOON SUNDAY. CHANCE OF
THUNDERSTORMS LATE SUNDAY AFTERNOON AND SUNDAY EVENING. WAVES 2
TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT LATE...FURTHER
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT DURING SUNDAY.

MICHIGAN SOUTH 11220 15330 11436. CHANCE OF SHOWERS SUNDAY
AFTERNOON. CHANCE OF THUNDERSTORMS SUNDAY EVENING. WAVES 2 TO 4
FT TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT SUNDAY.

$$

MTF

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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