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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 071900
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
200 PM CDT Tue Apr 7 2020

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 of 29.6 inches will move from central WI to lower MI
this afternoon and evening. The low will drag a weak cold front
through shifting the modest southerly winds over the southern two
thirds of the lake to west to northwesterly winds. Areas of dense
fog will persist at least into the evening but possibly longer,
including on Wednesday. A deepening low will move east across
Ontario for Wednesday into Thursday morning and will deepen to
29.2 inches. The deep low will sweep a strong cold front across
Lake Michigan by Wednesday evening. Strong northwest to west winds
will develop Wednesday night into Thursday behind the front. A
Gale Watch is in effect for all of Lake MI for Thursday and
Thursday night.

&&

LMZ261-362-364-563-080315-
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 Rock Island Passage to Sturgeon Bay WI-
200 PM CDT Tue Apr 7 2020

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

TONIGHT
East winds 10 to 20 kt backing to northwest 10 to
15 kt. Slight chance of rain showers this evening. Areas of fog.
Waves 1 to 2 ft.

WEDNESDAY
West winds 10 to 15 kt becoming southwest 10 to
20 kt. Patchy fog. Chance of rain showers in the afternoon. Waves
1 to 3 ft.

WEDNESDAY NIGHT
West winds 10 to 20 kt increasing to 15 to
25 kt. Chance of rain showers in the evening. Waves 2 to 4 ft.

THURSDAY
West winds to 30 kt becoming northwest gales to
35 kt. Chance of rain showers. Waves 4 to 7 ft occasionally to
9 ft.

THURSDAY NIGHT
Northwest gales to 40 kt. Waves 4 to 7 ft
occasionally to 9 ft.

FRIDAY
Northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.

FRIDAY NIGHT
West winds 10 to 15 kt becoming southwest. Waves
1 to 3 ft.

SATURDAY
Southwest winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.

SUNDAY
Northwest winds 10 to 15 kt. Chance of rain showers.
Waves 1 to 3 ft. 



LMZ366-565-567-868-080315-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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-
200 PM CDT Tue Apr 7 2020

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING

...GALE WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

TONIGHT
Southwest winds 10 to 15 kt veering to northwest 5 to
10 kt. Chance of rain showers and thunderstorms this evening.
Areas of dense fog this evening, then areas of fog overnight.
Waves 1 to 2 ft.

WEDNESDAY
West winds 5 to 10 kt becoming southwest late in the
morning, then becoming south 10 to 20 kt early in the afternoon
becoming southwest late. Widespread fog in the morning, then
patchy fog in the afternoon. Rain showers in the afternoon. Waves
1 to 3 ft.

WEDNESDAY NIGHT
West winds 15 to 25 kt. Chance of rain
showers. Waves 2 to 4 ft.

THURSDAY
West winds to 30 kt becoming northwest gales to
35 kt. Waves 5 to 8 ft occasionally to 10 ft.

THURSDAY NIGHT
Northwest gales to 40 kt diminishing to gales
to 35 kt. Waves 5 to 8 ft occasionally to 10 ft.

FRIDAY
Northwest winds to 30 kt becoming west 10 to 20 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.

FRIDAY NIGHT
South winds 10 to 15 kt becoming southwest 5 to
10 kt. Waves 1 to 3 ft.

SATURDAY
Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Chance of rain showers. Waves 2 to 4 ft.

SUNDAY
North winds 10 to 20 kt. Chance of rain showers. Waves
1 to 3 ft. 



LMZ669-671-673-675-870-872-874-876-080315-
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 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-
200 PM CDT Tue Apr 7 2020

SHEBOYGAN WI TO PENTWATER MI SOUTH TO WINTHROP HARBOR IL TO SOUTH
HAVEN MI...

DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING

...GALE WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

TONIGHT
Southwest winds 10 to 20 kt veering to northwest 10 to
15 kt. Chance of rain showers and thunderstorms this evening.
Areas of dense fog. Waves 1 to 3 ft.

WEDNESDAY
Northwest winds 5 to 10 kt backing to southwest late
in the morning, then becoming south 10 to 20 kt early in the
afternoon becoming southwest 15 to 25 kt late. Areas of dense fog
in the morning, then patchy fog in the afternoon. Rain showers in
the afternoon. Waves 1 to 3 ft.

WEDNESDAY NIGHT
Northwest winds 15 to 25 kt increasing to
30 kt. Rain showers in the evening, then chance of rain showers
overnight. Waves 1 to 3 ft building to 4 to 7 ft occasionally to
9 ft.

THURSDAY
West gales to 35 kt becoming northwest gales to
40 kt. Waves 7 to 10 ft occasionally to 13 ft.

THURSDAY NIGHT
Northwest gales to 40 kt. Waves 6 to 9 ft
occasionally to 12 ft.

FRIDAY
Northwest winds to 30 kt becoming west 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft.

FRIDAY NIGHT
Southwest winds 10 to 15 kt. Waves 2 to 4 ft
subsiding to 1 to 3 ft.

SATURDAY
Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Chance of rain showers. Waves 2 to 4 ft.

SUNDAY
North winds 10 to 20 kt. Chance of rain showers. Waves
2 to 4 ft. 



LMZ080-777-779-878-080315-
Lake Michigan from Michigan City IN to St. Joseph MI 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 St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
200 PM CDT Tue Apr 7 2020

WINTHROP HARBOR IL TO SOUTH HAVEN MI SOUTH...

...GALE WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

TONIGHT
Southwest winds 10 to 20 kt veering to north 10 to
15 kt. Chance of rain showers and thunderstorms this evening.
Patchy fog this evening, then areas of fog overnight. Waves 2 to
4 ft subsiding to 1 to 3 ft.

WEDNESDAY
North winds 5 to 10 kt backing to southwest late in
the morning, then becoming south 10 to 20 kt early in the
afternoon increasing to 15 to 25 kt late. Widespread dense fog in
the morning, then patchy fog in the afternoon. Chance of rain
showers in the afternoon. Waves 1 to 2 ft.

WEDNESDAY NIGHT
Northwest winds 15 to 25 kt increasing to
30 kt. Rain showers in the evening, then rain showers likely
overnight. Waves 1 to 2 ft building to 4 to 7 ft occasionally to
9 ft.

THURSDAY
West gales to 35 kt becoming northwest gales to
40 kt. Waves 6 to 9 ft occasionally to 12 ft.

THURSDAY NIGHT
Northwest gales to 40 kt. Waves 6 to 9 ft
occasionally to 12 ft.

FRIDAY
Northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.

FRIDAY NIGHT
Southwest winds 5 to 10 kt. Waves 2 to 4 ft
subsiding to 1 to 2 ft.

SATURDAY
Southwest winds 10 to 15 kt becoming south. Chance of
rain showers. Waves 1 to 3 ft.

SUNDAY
North winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of rain showers. Waves 1 to 3 ft building to 2 to 4 ft. 



LMZ761-080315-
MAFOR 0721/
MICHIGAN NORTH 11320 11113 13713 11613 11510 11520. Chance of
rain showers and thunderstorms early this evening. Chance of rain
showers early Wednesday afternoon. Waves 2 feet or less.

MICHIGAN SOUTH 11424 11623 11723 11724 11714 11604 11510 11420.
Chance of showers and thunderstorms this evening. Chance of
showers early Wednesday afternoon. Waves 1 to 3 feet.



Gehring

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

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