310 

FZUS63 KMQT 172001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Fri Apr 17 2026

For waters beyond 5 nautical miles of shore on Lake Superior.

Waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. Occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.SYNOPSIS...



A low of around 29.4 inches will move from just north of Lake
Superior to the Hudson Bay overnight. Behind it, ridging builds over
the lake, strengthening to about 30.3 inches Sunday night into
Monday morning. This ridging quickly gives way to 29.8 inch
troughing Monday night into Tuesday morning as a weakening low
swings from the Hudson Bay shoreline of far northern Ontario into
James Bay. High pressure ridging builds back to 30.2 inches over
Lake Superior by Tuesday night. The high will shift east on
Wednesday as a 29.2 inch low pressure develops over the high plains.


LSZ162-180800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Fri Apr 17 2026 /300 PM CDT Fri Apr 17 2026/

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Rain
showers likely and a chance of thunderstorms. Waves 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots. A chance of rain showers
through midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.SATURDAY...West winds 20 to 30 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible in the afternoon,
then diminishing to 20 to 30 knots late. A slight chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. A slight chance of snow showers
through midnight. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots veering west after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming northeast 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 2 to 4 feet.

$$

LSZ263-180800-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
400 PM EDT Fri Apr 17 2026

...GALE WARNING IN EFFECT FROM 4 AM EDT SATURDAY THROUGH SATURDAY
EVENING...

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Rain showers
likely and a chance of thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots
after midnight. A slight chance of thunderstorms through
midnight. A chance of rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 35 knots. A slight chance of snow
showers. Waves building to 7 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots diminishing to
15 to 25 knots. A slight chance of snow showers through midnight.
Waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.MONDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 10 to 20 knots becoming east 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ264-180800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Fri Apr 17 2026

...GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...GALE WARNING IN EFFECT FROM 4 AM EDT SATURDAY THROUGH SATURDAY
EVENING...

.LATE THIS AFTERNOON...South gales to 35 knots. A chance of
showers and thunderstorms. Waves 6 to 9 feet occasionally to
11 feet building to 7 to 10 feet occasionally to 13 feet.
.TONIGHT...South winds 20 to 30 knots veering west after
midnight, then veering northwest late. A chance of thunderstorms
through midnight. A chance of rain showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A slight chance of snow showers. Waves
building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. A slight chance of snow showers
through midnight. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...West winds 15 to 25 knots becoming east 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ265-180800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Fri Apr 17 2026

...GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...GALE WARNING IN EFFECT FROM 4 AM EDT SATURDAY THROUGH SATURDAY
EVENING...

.LATE THIS AFTERNOON...South gales to 35 knots. A chance of
showers and a slight chance of thunderstorms. Waves 4 to 8 feet
occasionally to 10 feet.
.TONIGHT...South gales to 35 knots veering west after midnight.
Rain showers likely and a chance of thunderstorms through
midnight, then a chance of rain showers after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet.
.SATURDAY...West gales to 40 knots. A slight chance of snow
showers. Waves building to 5 to 9 feet occasionally to 11 feet.
.SATURDAY NIGHT...West gales to 40 knots becoming northwest gales
to 35 knots after midnight. A slight chance of snow showers
through midnight. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...South gales to 35 knots veering southwest after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ266-180800-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
400 PM EDT Fri Apr 17 2026

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...
...GALE WARNING IN EFFECT FROM 4 AM EDT SATURDAY THROUGH SATURDAY
EVENING...

.LATE THIS AFTERNOON...South gales to 35 knots. A chance of
showers. Waves 6 to 9 feet occasionally to 11 feet building to
7 to 10 feet occasionally to 13 feet.
.TONIGHT...South gales to 35 knots becoming west 20 to 30 knots
after midnight, then becoming northwest gales to 35 knots late. A
chance of rain showers and a slight chance of thunderstorms
through midnight, then rain showers likely, possibly mixed with
snow showers and sleet after midnight. Waves subsiding to 4 to
7 feet occasionally to 9 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.SATURDAY...Northwest gales to 35 knots backing west in the
afternoon. A chance of rain showers through early afternoon. A
slight chance of snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SATURDAY NIGHT...West gales to 35 knots veering northwest after
midnight. A slight chance of snow showers. Waves subsiding to
8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northwest winds 20 to 30 knots. A slight chance of snow
showers through early afternoon. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 20 to
30 knots by mid afternoon. Waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...South gales to 40 knots veering southwest after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet.
.TUESDAY...Northwest winds 20 to 30 knots becoming north 10 to
20 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ267-180800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Fri Apr 17 2026

...GALE WARNING IN EFFECT FROM 4 AM EDT SATURDAY THROUGH SATURDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Southeast gales to 35 knots veering south after
midnight, then becoming west 20 to 30 knots late. A chance of
rain showers through midnight. A chance of thunderstorms. Rain
showers, possibly mixed with sleet after midnight. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west gales to
40 knots in the afternoon. A chance of rain showers, possibly
mixed with sleet through early afternoon. A slight chance of snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet.
.SATURDAY NIGHT...West gales to 35 knots veering northwest after
midnight. A chance of snow showers. Waves subsiding to 9 to
12 feet occasionally to 15 feet.
.SUNDAY...Northwest gales to 35 knots. A slight chance of snow
showers through early afternoon. Waves subsiding to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 5 to 15 knots becoming south 15 to 25 knots
by mid afternoon. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.MONDAY NIGHT...South gales to 35 knots veering southwest after
midnight. Waves building to 6 to 10 feet occasionally to 13 feet.
.TUESDAY...West winds 20 to 30 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves building to 2 to 4 feet.

$$

LSZ261-180200-
MAFOR 1721/
Superior West...GALE WARNING IN EFFECT...11526 11630 14640 11650
11640. A chance of thunderstorms this evening. Waves 2 to 4 feet
building to 3 to 6 feet tonight. Waves 5 to 8 feet Saturday.

Superior North Central...GALE WARNING IN EFFECT...11440 11446
11640 12740 11640 12650. A chance of thunderstorms this evening.
Waves 6 to 10 feet subsiding to 4 to 7 feet tonight. Waves 5 to 9
feet building to 7 to 11 feet Saturday.

Superior South Central...GALE WARNING IN EFFECT...11450 11456
11546 11640 11740 13650. A chance of thunderstorms this evening.
Waves 4 to 7 feet subsiding to 3 to 6 feet, then building to 4 to
7 feet tonight. Waves 5 to 9 feet building to 7 to 10 feet
Saturday.

Superior East...GALE WARNING IN EFFECT...11340 11346 11440 11646
11747 11750 12650. A chance of thunderstorms tonight. A chance of
light sleet Saturday morning. Waves 3 to 5 feet building to 4 to
7 feet tonight. Waves 7 to 11 feet building to 9 to 12 feet
Saturday.

$$

WFO MQT

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

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






798 

FZUS61 KBUF 172004
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
404 PM EDT Fri Apr 17 2026

For waters beyond five nautical miles of shore on Lake Ontario

Waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. Occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.SYNOPSIS...A 30.0 inch high over the Lake this evening will slide
east into New England tonight. Meanwhile, a 29.4 inch low near Lake
Superior this evening will move to James Bay and deepen to 29.0
inches Saturday, while pushing a trailing strong cold front across
the Lake later Saturday and Saturday evening. A 30.4 inch high will
then settle southeastward across the Great Lakes Sunday through
Monday night, before sliding off the mid-Atlantic coast Tuesday. A
29.4 inch low over lower Hudson Bay Tuesday, will weaken to 29.9
inches by Wednesday, while pushing an attendant weak cold front
across the Lake Tuesday night. A 30.2 inch high will then build
across the Great Lakes region Wednesday and Thursday.

LOZ062-180300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
404 PM EDT Fri Apr 17 2026

.TONIGHT...East winds 10 knots or less increasing to 10 to
15 knots. Patchy fog. Waves 2 feet or less.
.SATURDAY...Southeast winds 10 to 15 knots becoming southwest
15 to 20 knots. Patchy fog early. A chance of showers late in the
morning. Showers in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. Rain showers likely. Waves 2 to 4 feet.
.SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
A chance of rain showers. Waves 2 to 4 feet building to 3 to
5 feet.
.SUNDAY NIGHT...West winds 15 to 20 knots becoming northwest. A
chance of rain showers in the evening. Waves 3 to 5 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming southwest 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds 10 to 15 knots becoming northwest. A
chance of rain showers. Waves 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots becoming northeast. Waves
2 feet or less.

$$

LOZ063>065-180300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
404 PM EDT Fri Apr 17 2026

.TONIGHT...West winds 10 knots or less becoming southeast 10 to
15 knots. Patchy fog. Waves 2 feet or less.
.SATURDAY...Southeast winds 15 to 25 knots becoming south. Patchy
fog early. A chance of showers early in the afternoon. Showers
late. Waves 1 to 3 feet building to 3 to 5 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west.
Rain showers. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
Rain showers in the morning, then a chance of rain showers in the
afternoon. Waves 2 to 4 feet building to 3 to 6 feet.
.SUNDAY NIGHT...West winds 15 to 20 knots becoming northwest.
Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally
around 9 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming west 10 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds 15 to 20 knots becoming west 10 to
15 knots. A chance of rain showers. Waves 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots becoming north. Waves
1 to 3 feet subsiding to 1 foot or less.

$$

LOZ061-180300-
MAFOR 1721/
ONTARIO WEST 1/2 14200 12310 11420 11426. Waves 2 feet or less
tonight. Waves 1 to 3 feet building to 2 to 4 feet Saturday.

ONTARIO EAST 1/2 11700 11400 12300 12320 11420 11430. Waves 2
feet or less tonight. Waves 1 to 3 feet building to 3 to 5 feet
Saturday.

$$







960 

FZUS61 KBUF 172005
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
404 PM EDT Fri Apr 17 2026

SLZ022-024-180300-
Saint Lawrence River from Cape Vincent to Saint Regis
404 PM EDT Fri Apr 17 2026

.TONIGHT...Northeast winds less than 10 knots. Mainly clear.
.SATURDAY...Southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. A chance of showers late.
.SATURDAY NIGHT...South winds 15 to 20 knots becoming west 10 to
15 knots. Rain showers.
.SUNDAY...West winds 10 to 15 knots. Rain showers in the morning,
then a chance of rain showers in the afternoon.
.SUNDAY NIGHT...West winds 5 to 15 knots becoming northwest.
Partly cloudy.
.MONDAY...Northwest winds 10 knots or less becoming southwest.
Partly cloudy, then becoming mainly clear.
.TUESDAY...South winds 5 to 10 knots becoming west. A chance of
rain showers.
.WEDNESDAY...Northwest winds 10 knots or less. Partly cloudy.

$$







372 

FZUS63 KMKX 172043
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
343 PM CDT Fri Apr 17 2026

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...

Southerly winds will continue to increase as a surface low of
29.4 inches tracks across Lake Superior this afternoon and
evening. Winds will become gusty and southeasterly through tonight,
and strong to severe storms will cross the lake as a cold front
sweeps through the area. Winds are expected to remain just below
gale force. Dense fog will continue over the lake until the cold
front clears late tonight. Winds then become northwesterly behind
the cold front Saturday morning. Breezy northwesterly winds then
continue Saturday through Sunday as the low then races northeast
toward Hudson Bay. Winds ease Monday morning as high pressure
tracks southeast over the upper Great Lakes.

LMZ261-362-364-366-563-565-567-868-180300-
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-
343 PM CDT Fri Apr 17 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT SATURDAY...

.TONIGHT...Southeast winds to 30 kt. A few gale force gusts up to
35 kt possible. Patchy fog. Rain showers with a chance of
thunderstorms. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.SATURDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Patchy fog in the morning. Chance of rain showers in the morning,
then chance of snow showers and slight chance of rain showers in
the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft.
.SATURDAY NIGHT...West winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.SUNDAY...Northwest winds 15 to 25 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.MONDAY...West winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY NIGHT...South winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.TUESDAY...Southwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...East winds 10 to 15 kt becoming northeast. Waves
1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-180300-
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-
343 PM CDT Fri Apr 17 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT SATURDAY...

.TONIGHT...South winds to 30 kt veering to west. Patchy fog. Rain
showers with a chance of thunderstorms. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Patchy fog in the morning. Slight chance of rain showers in the
morning. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.SATURDAY NIGHT...West winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 4 to
6 ft occasionally to 8 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt becoming northeast. Waves
2 to 4 ft.
.MONDAY...East winds 5 to 10 kt becoming southeast 10 to 20 kt in
the afternoon. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY NIGHT...Southeast winds 15 to 25 kt becoming south to
30 kt. Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft.
.TUESDAY...South winds to 30 kt diminishing to 10 to 20 kt. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Waves 2 to 4 ft
subsiding to 1 to 3 ft.

$$
LMZ761-180300-
MAFOR 1722 AMD/
MICHIGAN NORTH 11346 19344 12456 11556 11740 11730 12630. A
chance of thunderstorms tonight. A chance of snow showers
Saturday afternoon. Waves 3 to 5 feet building to 5 to 8 feet
tonight. Waves 3 to 6 feet subsiding to 2 to 4 feet Saturday.

MICHIGAN SOUTH 13446 11546 19544 11640 11740 11730 11630. Waves 3
to 5 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet
tonight. Waves 3 to 6 feet Saturday.

$$


WFO MKX

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

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