Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 190141
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
841 PM CDT SAT MAR 18 2017

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 OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...A 30.3 INCH RIDGE OVER THE UPPER MIDWEST WILL SHIFT
OVER LAKE MICHIGAN BY SUNDAY MORNING. LOW PRESSURE OF 29.2 INCHES
OVER ALBERTA THIS EVENING WILL DEEPEN TO 28.8 INCHES AS IT MOVES
TO HUDSON BAY BY SUNDAY NIGHT. A COLD FRONT TRAILING SOUTH FROM
THIS LOW WILL MOVE ACROSS THE LAKE MONDAY MORNING. HIGH PRESSURE
OF 30.6 INCHES OVER THE CANADIAN PRAIRIES MONDAY WILL BUILD
SOUTHEAST WITH RIDGING EXTENDING INTO THE WESTERN GREAT LAKES
REGION BY MONDAY EVENING. THE CENTER OF THE HIGH WILL REACH THE
WESTERN GREAT LAKES BY MIDDAY WEDNESDAY.

LMZ261-362-364-366-563-565-567-868-190930-
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 MAR 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST
10 TO 15 KT. WAVES 2 TO 4 FT.
.SUNDAY...EAST WINDS 5 TO 10 KT BECOMING SOUTH LATE IN THE
MORNING...THEN INCREASING TO 15 TO 25 KT THROUGH THE AFTERNOON.
WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING NORTH. WAVES 2 TO 4 FT
SUBSIDING TO 1 TO 3 FT.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 1 TO 2 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH TO 30 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.THURSDAY...SOUTH WINDS 15 TO 25 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190930-
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 MAR 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTH WINDS 15 TO 20 KT DIMINISHING TO 10 TO
15 KT LATE. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.SUNDAY...NORTHEAST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO 20 KT
IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH 10 TO
20 KT. CHANCE OF RAIN SHOWERS IN THE EVENING...THEN RAIN SHOWERS
LIKELY OVERNIGHT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH. CHANCE OF
RAIN SHOWERS IN THE MORNING. WAVES 1 TO 3 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH TO 30 KT IN
THE AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT BECOMING NORTHEAST. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT BECOMING NORTH 10 TO
20 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.

$$
LMZ761-190930-
MAFOR 1903/
MICHIGAN NORTH 11830 11820 11110 11200 11300 11420 12430. CHANCE
OF RAIN SHOWERS SUNDAY EVENING. WAVES 2 TO 4 FT OVERNIGHT. WAVES 1
TO 2 FT BUILDING TO 2 TO 4 FT SUNDAY. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUNDAY EVENING.

MICHIGAN SOUTH 12820 11810 11100 11300 11410 11420 11330. CHANCE OF
RAIN SHOWERS SUNDAY EVENING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
SUBSIDING TO 2 TO 4 FT OVERNIGHT. WAVES 1 TO 3 FT SUNDAY BUILDING
TO 2 TO 4 FT SUNDAY EVENING.

$$

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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