Great Lakes Forecast
Issued by NWS

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662
FZUS63 KLOT 201335
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
835 AM CDT MON MAR 20 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...LOW PRESSURE OF 28.9 INCHES IS LOCATED OVER HUDSON
BAY WITH A COLD FRONT TRAILING ACROSS THE NORTHERN LAKES. THIS
FRONT WILL MOVE SOUTH ACROSS THE LAKE TODAY. STRONG HIGH PRESSURE
OF 30.6 INCHES WILL BUILD SOUTHEAST FROM THE CANADIAN PRAIRIES
INTO THE WESTERN GREAT LAKES TUESDAY NIGHT AND BE CENTERED OVER
THE GREAT LAKES BY WEDNESDAY...THEN MOVE SOUTHEAST TO THE MID
ATLANTIC COAST BY THURSDAY AFTERNOON.

LMZ261-362-364-366-563-565-567-868-202000-
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-
835 AM CDT MON MAR 20 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...SOUTHWEST WINDS 10 TO 15 KT SHIFTING NORTH 10
TO 20 KT BY EARLY AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS THIS
AFTERNOON. WAVES 2 TO 4 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT BACKING TO WEST. WAVES 2 TO
4 FT.
.TUESDAY...NORTHWEST WINDS TO 30 KT BECOMING NORTH. WAVES 2 TO
4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH 10
TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST. RAIN
SHOWERS. WAVES 2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-202000-
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-
835 AM CDT MON MAR 20 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...SOUTH WINDS 10 TO 20 KT SHIFTING NORTH THIS
AFTERNOON. WAVES 2 TO 4 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT. WAVES
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT BECOMING NORTHEAST. WAVES
6 TO 9 FT OCCASIONALLY TO 11 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST.
WAVES 2 TO 4 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.FRIDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ761-202000-
MAFOR 2015/
MICHIGAN NORTH 11510 19820 14820 11710 11620 11730 19740. WAVES
2 TO 4 FT.

MICHIGAN SOUTH 11420 11420 19820 15820. WAVES 2 TO 4 FT.

$$

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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