474
FZUS63 KMKX 280804
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
304 AM CDT Fri Mar 28 2025

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 around 29.5 inches will works its way across the
Dakotas early this morning. Expecting a warm front to lift
northward across Lake Michigan as this low pushes east, but is
progged to stall across the mid-section of Lake Michigan during
the today. Thus looking at more easterly winds across the
northern half and gusty southerly across the southern half.
Weakening low pressure will then push across central WI into the
mid Lake overnight tonight into early Saturday and the stalled
warm front will gradually sink southward Saturday. Northern two
thirds of the lake will see north to northeasterly flow, while the
far southern third may be more east to southeast. Some
thunderstorms will be possible at time tonight and again
Saturday. Gales are not expected at this time.

Will then see another low pressure around 29.4 inches develop
along the CO front range and lift across the Midwest overnight
Saturday into Sunday before clipping the southern third of Lake
Michigan later Sunday. This will once again result in easterly
flow across the northern two-thirds of the Lake on Sunday with
southeasterly winds across the southern third. The low pressure
then looks to lift northeast into eastern Ontario/Quebec overnight
Sunday with prevailing northerly winds across Lake Michigan
heading into early next week

LMZ261-362-364-366-563-565-567-868-281515-
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-
304 AM CDT Fri Mar 28 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...East winds 15 to 25 kt increasing to 30 kt. Chance of
rain and light freezing rain this morning, then chance of rain
and slight chance of thunderstorms this afternoon. Waves 4 to
6 ft occasionally to 8 ft.
.TONIGHT...East winds to 30 kt backing to north. Chance of rain
and thunderstorms in the evening, then chance of rain,
thunderstorms and freezing rain overnight. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...Northeast winds 15 to 25 kt. Chance of rain and
freezing rain likely in the morning, then chance of rain in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY NIGHT...Northeast winds to 30 kt becoming east. Rain
and light freezing rain in the evening, then rain, snow and
freezing rain overnight. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...East winds to 30 kt becoming northeast 15 to 25 kt.
Rain, snow and freezing rain in the morning, then rain in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt increasing to 30 kt. Rain
likely, chance of snow and light freezing rain. Waves 8 to 11 ft
occasionally to 14 ft.
.MONDAY...North winds to 30 kt. Chance of snow. Waves 8 to 12 ft
occasionally to 16 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming east 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-281515-
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-
304 AM CDT Fri Mar 28 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 20 kt becoming south 15 to 25 kt
late this morning, then increasing to 30 kt early this afternoon
becoming south to 30 kt late. Chance of rain and thunderstorms
this morning. Waves 4 to 6 ft occasionally to 8 ft.
.TONIGHT...South winds to 30 kt becoming southwest. Slight chance
of rain and thunderstorms overnight. Waves 5 to 8 ft occasionally
to 10 ft.
.SATURDAY...Southwest winds 15 to 25 kt veering to north. Chance
of rain. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY NIGHT...Northeast winds 15 to 25 kt becoming east 10 to
20 kt. Rain. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Southeast winds 10 to 20 kt becoming south. Rain. Waves
6 to 9 ft occasionally to 12 ft.
.SUNDAY NIGHT...Northwest winds 15 to 25 kt becoming north. Rain
likely. Waves 8 to 11 ft occasionally to 14 ft building to 8 to
12 ft occasionally to 16 ft.
.MONDAY...North winds to 30 kt. Chance of rain and snow. Waves
8 to 12 ft occasionally to 16 ft.
.TUESDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

$$

LMZ761-281515-
MAFOR 2810/
MICHIGAN NORTH 12230 11330 11340 11240 11346 11240 11846. A
chance of light freezing rain this morning. A chance of
thunderstorms tonight. Waves 1 to 3 feet building to 3 to 5 feet
today. Waves 3 to 6 feet tonight.

MICHIGAN SOUTH 11326 11420 11430 12440 13540. A chance of
thunderstorms this morning. Waves 1 to 3 feet building to 3 to 5
feet today. Waves 3 to 6 feet building to 4 to 7 feet tonight.

$$


Patterson

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

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