National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 010143
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
843 PM CDT Fri Mar 31 2023

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 29.2 inches continues to push east across
southern WI this evening along with a cold front. Some lingering
showers and storms across the lake overnight. Then expect winds on
the backside of the low to pick up. Expect strong north to
northwesterly winds to gust to gales and spread north to south as
the low moves east of the area Saturday morning. There could be a
brief, an hour or two period where there may be pockets of storm
force gusts over portions of the open waters Saturday morning
before the pressure gradient weakens and winds weaken through the
afternoon into Saturday night. High pressure then will briefly
build across the region Saturday night into Sunday morning before
another low pressure system tracks through the northern Great
Lakes with gusty southerly winds returning for the start of next
week.

LMZ261-362-364-366-563-565-567-868-010930-
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-
843 PM CDT Fri Mar 31 2023

SHEBOYGAN WI TO PENTWATER MI NORTH...

GALE WARNING IN EFFECT THROUGH SATURDAY EVENING


REST OF TONIGHT
Northeast winds to 30 kt becoming east gales
to 45 kt, then becoming northeast gales to 40 kt late. Patchy
fog. Rain showers, freezing rain and slight chance of
thunderstorms through early evening, then rain showers, snow
showers and slight chance of thunderstorms overnight. Waves 6 to
9 ft occasionally to 12 ft building to 10 to 14 ft occasionally
to 18 ft.

SATURDAY
North gales to 45 kt diminishing to gales to 40 kt.
Patchy fog in the morning. Snow showers likely with slight chance
of rain showers in the morning, then chance of snow showers in
the afternoon. Waves 10 to 14 ft occasionally to 18 ft building
to 15 to 20 ft occasionally to 26 ft.

SATURDAY NIGHT
North winds to 30 kt diminishing to 10 to 20 kt
late in the evening, then becoming northeast 10 to 15 kt after
midnight veering to southeast 5 to 10 kt late. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 2 to 4 ft.

SUNDAY
South winds 15 to 25 kt increasing to 30 kt. Waves 3 to
5 ft building to 7 to 10 ft occasionally to 13 ft.

SUNDAY NIGHT
South gales to 35 kt becoming southwest. Waves
7 to 10 ft occasionally to 13 ft.

MONDAY
Southwest winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.

MONDAY NIGHT
North winds 10 to 20 kt becoming northeast. Waves
2 to 4 ft.

TUESDAY
Northeast winds 15 to 25 kt increasing to gales to
35 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.

WEDNESDAY
Southeast gales to 40 kt becoming south. Chance of
rain. Waves 6 to 9 ft occasionally to 12 ft building to 7 to
10 ft occasionally to 13 ft.


LMZ080-669-671-673-675-777-779-870-872-874-876-878-010930-
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 Fri Mar 31 2023

SHEBOYGAN WI TO PENTWATER MI SOUTH...

GALE WARNING IN EFFECT THROUGH SATURDAY EVENING


REST OF TONIGHT
South winds to 30 kt becoming southwest gales
to 35 kt. Areas of dense fog through early evening, then patchy
dense fog overnight. Rain showers and slight chance of
thunderstorms through early evening, then slight chance of rain
showers and thunderstorms overnight. Waves 4 to 6 ft occasionally
to 8 ft building to 7 to 10 ft occasionally to 13 ft.

SATURDAY
West gales to 35 kt becoming northwest storm force
winds to 50 kt late in the morning, then becoming north early in
the afternoon diminishing to gales to 45 kt late. Chance of rain
and snow showers in the morning, then chance of snow showers in
the afternoon. Waves 7 to 10 ft occasionally to 13 ft building to
18 to 23 ft occasionally to 30 ft.

SATURDAY NIGHT
North gales to 35 kt diminishing to 15 to 25 kt
late in the evening, then becoming northeast 10 to 15 kt after
midnight becoming east 5 to 10 kt late. Waves 14 to 18 ft
occasionally to 23 ft subsiding to 4 to 6 ft occasionally to
8 ft.

SUNDAY
South winds 15 to 25 kt increasing to 30 kt. Waves 3 to
5 ft building to 6 to 9 ft occasionally to 12 ft.

SUNDAY NIGHT
South winds to 30 kt becoming southwest gales to
35 kt. Waves 6 to 9 ft occasionally to 12 ft.

MONDAY
Southwest winds 10 to 15 kt becoming south. Waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft.

MONDAY NIGHT
Northeast winds 10 to 20 kt. Chance of rain.
Waves 1 to 3 ft building to 2 to 4 ft.

TUESDAY
East winds to 30 kt. Rain likely. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.

WEDNESDAY
South gales to 35 kt becoming southwest gales to
40 kt. Chance of rain. Waves 5 to 8 ft occasionally to 10 ft.


&&STORM

LMZ761-010930-
MAFOR 0104/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11266 11167 11867 11877
11870 11860 11850 11830. Waves 8 to 11 ft occasionally to 14 ft
building to 10 to 14 ft occasionally to 18 ft overnight. Waves 10
to 14 ft occasionally to 18 ft building to 15 to 20 ft
occasionally to 26 ft Saturday. Waves 10 to 14 ft occasionally to
18 ft subsiding to 6 to 9 ft occasionally to 12 ft Saturday
evening.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11550 19554 11550 11650
11667 11770 11870 11850 11840. A chance of rain showers Saturday
morning. Waves 5 to 8 ft occasionally to 10 ft building to 8 to
11 ft occasionally to 14 ft overnight. Waves 7 to 10 ft
occasionally to 13 ft building to 18 to 23 ft occasionally to 30
ft Saturday. Waves 15 to 20 ft occasionally to 26 ft subsiding to
10 to 14 ft occasionally to 18 ft Saturday evening.


Wagner

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

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