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National Weather Service Marine Forecast FZUS63 KLOT

FZUS63 KLOT 251338
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 AM CDT Fri May 25 2018

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 Mid Atlantic
shore will drift eastward this afternoon, while broad low
pressure of 29.5 inches across the Canadian Prairies moves very
slowly moves southeast. This low will reach the western Great
Lakes by Saturday evening, weakening slightly to 29.7 inches as it
does so. The low will further weaken to a trough of 29.8 inches
and pass across the lake late in the weekend. High pressure of
30.1 inches will build from eastern Canada into the central and
eastern Great Lakes by the middle of next week.

LMZ261-362-364-366-563-565-567-868-252130-
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-
838 AM CDT Fri May 25 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TODAY
Southwest winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms this afternoon. Waves
3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.

TONIGHT
Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 3 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.

SATURDAY
Southwest winds 10 to 15 kt becoming south 10 to 20 kt
by early afternoon. Chance of showers and thunderstorms, mainly
in the afternoon. Waves 1 to 3 ft.

SATURDAY NIGHT
South winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers and thunderstorms in the evening. Waves
1 to 3 ft.

SUNDAY
Southwest winds 10 to 15 kt. Waves 1 to 3 ft.

SUNDAY NIGHT
Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.

MONDAY
South winds 5 to 10 kt veering to northwest. Waves 1 to
2 ft.

TUESDAY
Northeast winds 10 to 20 kt. Waves 1 to 3 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-252130-
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-
838 AM CDT Fri May 25 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TODAY
South winds 10 to 20 kt. Waves 2 to 4 ft.

TONIGHT
South winds 10 to 20 kt becoming southwest 10 to
15 kt after midnight. Chance of showers and thunderstorms, mainly
overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft.

SATURDAY
Southwest winds 10 to 15 kt becoming south by early
afternoon. Waves 1 to 3 ft.

SATURDAY NIGHT
South winds 10 to 15 kt. Waves 1 to 3 ft.

SUNDAY
Southwest winds 10 to 15 kt becoming south. Waves 1 to
3 ft.

SUNDAY NIGHT
South winds 10 to 15 kt becoming southwest. Waves
1 to 2 ft.

MONDAY
Northwest winds 5 to 10 kt becoming north. Waves 1 to 2
ft.

TUESDAY
Northeast winds 10 to 15 kt. Waves 1 to 3 ft. 


LMZ761-252130-
MAFOR 2515/
MICHIGAN NORTH 13530 13520 12510. Chance of showers and
thunderstorms this afternoon and tonight. Chance of showers
Saturday morning. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft this afternoon...then subsiding to 2 to 4 ft
late tonight and to 1 to 3 ft by Saturday morning.

MICHIGAN SOUTH 14420 11410 13510. Chance of showers and
thunderstorms late this evening. Chance of showers and
thunderstorms Saturday morning. Waves 2 to 4 ft this afternoon
subsiding to 1 to 3 ft tonight and Saturday morning.



Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes