Great Lakes Forecast
Issued by NWS

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086
FZUS63 KLOT 220750
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
250 AM CDT SAT APR 22 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...HIGH PRESSURE OF 30.2 INCHES OVER THE NORTHERN PLAINS
AND UPPER MISSISSIPPI VALLEY WILL SPREAD SOUTHEAST ACROSS THE
CENTRAL PLAINS AND WESTERN GREAT LAKES THROUGH THE WEEKEND. WEAK
LOW PRESSURE OF 30.0 INCHES OVER ONTARIO WILL MOVE INTO NORTHERN
QUEBEC TONIGHT. A TRAILING COLD FRONT WILL MOVE TO CENTRAL
PORTIONS OF THE LAKE BY SUNDAY EVENING. ANOTHER LOW OF 29.4
INCHES WILL MOVE FROM THE NORTHERN PLAINS MONDAY ACROSS LAKE
MICHIGAN WEDNESDAY.

LMZ261-362-364-366-563-565-567-868-221400-
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-
250 AM CDT SAT APR 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...NORTHWEST WINDS 5 TO 10 KT SHIFTING SOUTHWEST 10 TO 15
KT THIS AFTERNOON. WAVES 1 TO 2 FT.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.SUNDAY...WEST WINDS 10 TO 20 KT VEERING TO NORTHEAST. WAVES 1 TO
3 FT.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES
2 TO 4 FT.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT.
WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT BECOMING NORTH. CHANCE
OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221400-
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-
250 AM CDT SAT APR 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT...THEN BECOMING WEST OVERNIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.SUNDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHEAST. WAVES
1 TO 3 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
.MONDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT.
WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ761-221400-
MAFOR 2209/
MICHIGAN NORTH 12700 11610 12510 13520. WAVES 1 TO 3 FT.

MICHIGAN SOUTH 12120 14820 11810 11700. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT THROUGH THIS EVENING...SUBSIDING TO 2 TO 4
FT TONIGHT.

$$

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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