014
FZUS63 KMKX 050143
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
843 PM CDT Sat May 4 2024

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...

Warm, moist air over the cooler lake waters will continue to
produce areas of dense marine fog into late tonight before a cold
frontal passage.

Low pressure around 29.8 inches over central Ontario will drag a
cold front across the lake tonight and shift winds from the east-
southeasterly to northwesterly. Thunderstorms with some gusty
winds continue to be possible along the front, with precipitation
exiting by Sunday morning as high pressure around 30.1 inches
begins to build into the western Great Lakes region. Expect
lighter, more variable winds for Sunday into Monday as high
pressure works its way across the region. Winds then shift to
east-southeast Monday afternoon and evening as low pressure
develops and deepens over the northern Plains. Winds will pivot
between southeasterly and southwesterly through midweek, prior to
turning out of the north and northwest on Thursday and Friday as
another area of low pressure moves east of the open waters.
Periods of showers and thunderstorms are forecast from early to
mid week, with conditions drying out by the end of the week and
beginning of next weekend.

LMZ261-362-050915-
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-
843 PM CDT Sat May 4 2024

ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH...

.REST OF TONIGHT...East winds 10 to 15 kt backing to northwest
10 to 20 kt. Patchy fog. Rain showers through early evening, then
chance of rain showers overnight. Waves 1 to 2 ft.
.SUNDAY...Northwest winds 10 to 15 kt becoming southwest. Waves
1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming west late in
the evening, then becoming southeast after midnight diminishing
to less than 10 kt late. Waves 1 to 2 ft.
.MONDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 ft or
less.
.MONDAY NIGHT...East winds 5 to 10 kt becoming southeast 10 to
15 kt. Waves 1 to 2 ft.
.TUESDAY...Southeast winds 10 to 20 kt becoming east 15 to 25 kt.
Chance of rain showers in the morning, then thunderstorms with a
chance of rain showers in the afternoon. Waves 2 to 4 ft building
to 3 to 5 ft.
.TUESDAY NIGHT...East winds 15 to 25 kt becoming southeast.
Chance of showers and thunderstorms. Waves 3 to 5 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming west. Waves
2 to 4 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north. Chance of
rain showers. Waves 1 to 3 ft.

$$

LMZ364-366-563-565-567-868-050915-
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-
843 PM CDT Sat May 4 2024

ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 PM CDT THIS EVENING...

.REST OF TONIGHT...Southwest winds 10 to 15 kt veering to
northwest 10 to 20 kt. Patchy dense fog through early evening,
then patchy fog overnight. Chance of rain showers. Waves 1 to
3 ft.
.SUNDAY...Northwest winds 10 to 20 kt veering to southeast 10 to
15 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...Southeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft subsiding to nearly calm.
.MONDAY...Southeast winds 5 to 10 kt becoming northeast. Waves
1 to 2 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...Southeast winds 15 to 25 kt. Chance of showers and
thunderstorms likely in the morning, then showers and
thunderstorms in the afternoon. Waves 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...Southeast winds 15 to 25 kt becoming southwest
10 to 20 kt. Showers likely with a chance of thunderstorms. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain showers. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-050915-
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-
843 PM CDT Sat May 4 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 PM CDT THIS EVENING...

.REST OF TONIGHT...South winds 10 to 15 kt veering to west 10 to
20 kt late this evening, then becoming northwest after midnight
increasing to 15 to 25 kt late. Patchy dense fog through early
evening, then patchy fog overnight. Chance of rain showers and
slight chance of thunderstorms through early evening, then chance
of rain showers overnight. Waves 1 to 3 ft building to 2 to 4 ft.
.SUNDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northeast 5 to
10 kt from late evening on. Waves 2 to 4 ft subsiding to 1 to
2 ft.
.MONDAY...East winds 10 to 15 kt. Waves 1 to 3 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 3 ft building to 2 to 4 ft.
.TUESDAY...Southeast winds 15 to 25 kt. Showers and
thunderstorms. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Showers likely with a chance of thunderstorms. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY...North winds 15 to 25 kt becoming northwest. Chance of
showers. Waves 3 to 5 ft.

$$

LMZ761-050915-
MAFOR 0504/
MICHIGAN NORTH 11726 13720 11710 11610 11410 11300. Waves 2 feet
or less overnight. Waves 1 to 3 feet Sunday. Waves 1 foot or less
Sunday evening.

MICHIGAN SOUTH 11720 19724 11730 11830 14820 11810. A chance of
showers overnight. Waves 2 feet or less building to 2 to 4 feet
overnight. Waves 2 to 4 feet Sunday. Waves 1 to 3 feet Sunday
evening.

$$


MH

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

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