fzus61 kbuf 172004
glflo 
expires:202604180300;;539931

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.


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. 

$$

fzus61 kbuf 172004
glflo 
expires:202604180300;;539930

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. 

$$

fzus61 kcle 171948
glfle 
expires:202604180230;;539387

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt fri apr 17 2026

for waters beyond five nautical miles of shore on lake erie

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 warm front will lift north across lake erie saturday morning
before low pressure 29.40 inches drags a cold front east through
the great lakes and ohio valley saturday evening. a trough
averaging 29.90 inches builds across the lake on sunday before
high pressure 30.40 inches moves overhead sunday night into
monday. 


lez165>168-180230-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
348 pm edt fri apr 17 2026

.tonight...east winds 5 to 15 knots becoming southeast 15 to
20 knots. patchy dense fog. patchy fog late. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming west. a chance of
showers with a slight chance of thunderstorms in the morning,
then showers with a chance of thunderstorms in the afternoon.
waves 2 to 4 feet building to 3 to 5 feet. 
.saturday night...west winds 15 to 20 knots. a chance of showers.
waves 2 to 4 feet. 
.sunday...west winds 15 to 20 knots. a chance of rain showers in
the afternoon. waves 2 to 4 feet. 
.sunday night...west winds 15 to 20 knots becoming north 10 to
15 knots. a chance of rain showers in the evening. waves 2 to
4 feet. 
.monday...northwest winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet. 
.wednesday...north winds 5 to 15 knots becoming east. waves 2 to
4 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171948
glfle 
expires:202604180230;;539388

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt fri apr 17 2026

for waters beyond five nautical miles of shore on lake erie

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 warm front will lift north across lake erie saturday morning
before low pressure 29.40 inches drags a cold front east through
the great lakes and ohio valley saturday evening. a trough
averaging 29.90 inches builds across the lake on sunday before
high pressure 30.40 inches moves overhead sunday night into
monday. 


lez061-169-180230-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
348 pm edt fri apr 17 2026

.tonight...northeast winds 10 knots or less becoming southeast
10 to 15 knots. areas of dense fog. patchy fog late. waves 2 feet
or less. 
.saturday...south winds 15 to 20 knots becoming southwest. a
slight chance of showers in the morning, then showers with a
chance of thunderstorms in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet. 
.saturday night...southwest winds 10 to 15 knots becoming west.
rain showers likely in the evening, then a chance of rain showers
overnight. waves 2 to 4 feet. 
.sunday...west winds 10 to 15 knots. a chance of rain and snow
showers in the afternoon. waves 2 to 4 feet. 
.sunday night...west winds 10 to 15 knots becoming northwest. a
chance of rain showers in the evening. waves 2 to 3 feet. 
.monday...northwest winds 5 to 10 knots becoming south. waves
1 to 2 feet. 
.tuesday...south winds 10 to 15 knots becoming west. waves 1 to
3 feet. 
.wednesday...north winds 10 knots or less becoming east. waves
1 to 3 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171948
glfle 
expires:202604180230;;539386

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt fri apr 17 2026

for waters beyond five nautical miles of shore on lake erie

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 warm front will lift north across lake erie saturday morning
before low pressure 29.40 inches drags a cold front east through
the great lakes and ohio valley saturday evening. a trough
averaging 29.90 inches builds across the lake on sunday before
high pressure 30.40 inches moves overhead sunday night into
monday. 


lez162>164-180230-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
348 pm edt fri apr 17 2026

.tonight...east winds 10 to 15 knots becoming south 15 to
20 knots. patchy fog late this evening. a chance of showers and
thunderstorms late. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming west. showers
with a chance of thunderstorms in the morning, then showers
likely with a slight chance of thunderstorms early in the
afternoon. a chance of showers with a slight chance of
thunderstorms late. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday night...west winds 15 to 20 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.sunday...west winds 15 to 20 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming east. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 171946
glfsc 
expires:202604180400;;539322

lake st clair forecast
national weather service detroit/pontiac mi
346 pm edt fri apr 17 2026

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...some areas of fog this evening into early tonight
mainly over the northern half of lake huron. low pressure, 29.30
inches, lifting into northern ontario drags a respectable cold
front through the central great lakes saturday supporting another
round of showers and storms. colder air filters into the region
the rest of the weekend maintaining moderate to strong
northwesterly winds.


lcz460-180400-
lake st clair-
346 pm edt fri apr 17 2026

.tonight...southeast winds 10 to 15 knots becoming south 15 to 20
knots early in the morning. partly cloudy ...then mostly cloudy with
light showers likely and a chance of thunderstorms early in the
morning. waves 1 to 3 feet.
.saturday...south winds 15 to 20 knots veering to the west in the
afternoon. light showers and a chance of thunderstorms in the
morning...then light showers likely in the afternoon. waves 1 to 3
feet.
.saturday night...west winds 10 to 15 knots. partly cloudy. waves 1
to 3 feet.
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots in
the late morning and afternoon. partly sunny. a chance of light
showers early in the afternoon. waves 1 to 3 feet.
.sunday night...northwest winds 15 to 20 knots diminishing to 5 to
10 knots. partly cloudy. a chance of light showers early in the
evening. waves 2 feet or less.
.monday...north winds 5 to 10 knots veering to the southeast in the
evening. mostly clear. waves 2 feet or less.
.tuesday...west winds 15 to 20 knots. partly cloudy. waves 1 to 3
feet.
.wednesday...east winds 10 to 15 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 171946
glflh 
expires:202604180400;;539318

open lake forecast for lake huron
national weather service detroit/pontiac mi
346 pm edt fri apr 17 2026

for waters beyond five nautical miles off shore on lake huron

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...some areas of fog this evening into early tonight
mainly over the northern half of lake huron. low pressure, 29.30
inches, lifting into northern ontario drags a respectable cold
front through the central great lakes saturday supporting another
round of showers and storms. colder air filters into the region
the rest of the weekend maintaining moderate to strong
northwesterly winds.


lhz361>363-180400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
346 pm edt fri apr 17 2026

.tonight...southeast winds 10 to 15 knots increasing to 20 to
25 knots with gusts to around 30 knots. areas of fog in the
evening. a chance of showers after midnight. waves 5 to 7 feet
building to 8 to 12 feet early in the morning. waves occasionally
around 15 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots late in the morning...then veering to the southwest
early in the afternoon veering to the west late in the afternoon.
showers likely in the morning. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.saturday night...northwest winds 10 to 15 knots. waves 6 to
9 feet. waves occasionally around 12 feet. 
.sunday...west winds 10 to 15 knots becoming northwest 20 to
25 knots with gusts to around 30 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 15 to 20 knots after midnight.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.monday...northwest winds 10 to 15 knots becoming west 5 to
10 knots late in the morning...then becoming southwest 10 to
15 knots late in the afternoon becoming south 15 to 20 knots with
gusts to around 30 knots late in the evening. waves 4 to 6 feet
subsiding to 2 to 4 feet late in the afternoon...then building to
6 to 9 feet late in the evening. waves occasionally around
12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots with gusts to around
30 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots early in the evening veering to the
northwest by midnight. waves 8 to 12 feet subsiding to 4 to
6 feet by midnight. waves occasionally around 15 feet. 
.wednesday...north winds 10 to 15 knots becoming northeast 5 to
10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet . 


$$

fzus63 kdtx 171946
glflh 
expires:202604180400;;539319

open lake forecast for lake huron
national weather service detroit/pontiac mi
346 pm edt fri apr 17 2026

for waters beyond five nautical miles off shore on lake huron

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...some areas of fog this evening into early tonight
mainly over the northern half of lake huron. low pressure, 29.30
inches, lifting into northern ontario drags a respectable cold
front through the central great lakes saturday supporting another
round of showers and storms. colder air filters into the region
the rest of the weekend maintaining moderate to strong
northwesterly winds.


lhz462>464-180400-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
346 pm edt fri apr 17 2026

.tonight...southeast winds 10 to 15 knots increasing to 20 to
25 knots with gusts to around 30 knots. patchy fog in the
evening. a chance of showers and thunderstorms after midnight.
waves 1 to 3 feet building to 5 to 7 feet. waves occasionally
around 10 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
early afternoon...then becoming west 10 to 15 knots late in the
afternoon. showers likely and a chance of thunderstorms in the
morning...then a chance of showers in the afternoon. waves 5 to
7 feet. waves occasionally around 10 feet. 
.saturday night...west winds 10 to 15 knots. waves 3 to 5 feet. 
.sunday...west winds 10 to 15 knots. a chance of snow showers in
the afternoon. waves 4 to 6 feet. waves occasionally around
8 feet. 
.sunday night...north winds 15 to 20 knots. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the morning...then veering to the northeast late
in the afternoon becoming south 15 to 20 knots late in the
evening. waves 4 to 6 feet subsiding to 1 to 3 feet late in the
afternoon...then building to 4 to 6 feet late in the evening.
waves occasionally around 8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
early afternoon...then becoming southwest 10 to 15 knots early in
the evening veering to the northwest by midnight. waves 5 to
7 feet subsiding to 2 to 4 feet by midnight. waves occasionally
around 10 feet. 
.wednesday...north winds 10 to 15 knots decreasing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet . 


$$

fzus63 kdtx 171357
glflh 
expires:202604172200;;523603

open lake forecast for lake huron
national weather service detroit/pontiac mi
957 am edt fri apr 17 2026

for waters beyond five nautical miles off shore on lake huron

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...patchy fog lingers through the morning with high 
pressure, 30.00 inches, crossing the region. a powerful cold front
arrives on saturday, bringing another round of showers and storms
in addition to stronger winds for the weekend.


lhz363-462>464-172200-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
957 am edt fri apr 17 2026

.rest of today...light and variable winds becoming east 5 to
10 knots in the afternoon. areas of fog late in the morning. 
waves 2 feet or less. 
.tonight...east winds 10 to 15 knots becoming southeast 20 to
25 knots with gusts to around 30 knots. a chance of showers after
midnight. waves 1 to 3 feet building to 6 to 9 feet. waves
occasionally around 12 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
early afternoon...then veering to the west early in the
afternoon. showers likely in the morning...then a chance of
showers in the afternoon. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.saturday night...west winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. a chance of showers
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...northwest winds 15 to 20 knots. waves 5 to 7 feet
building to 8 to 12 feet late in the afternoon. waves
occasionally around 15 feet. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then veering
to the north early in the evening becoming south 15 to 20 knots
by midnight. waves 4 to 6 feet subsiding to 2 to 4 feet early in
the evening...then building to 4 to 6 feet by midnight. waves
occasionally around 8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 


$$

fzus63 kdtx 171357
glflh 
expires:202604172200;;523602

open lake forecast for lake huron
national weather service detroit/pontiac mi
957 am edt fri apr 17 2026

for waters beyond five nautical miles off shore on lake huron

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...patchy fog lingers through the morning with high 
pressure, 30.00 inches, crossing the region. a powerful cold front
arrives on saturday, bringing another round of showers and storms
in addition to stronger winds for the weekend.


lhz361-362-172200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
957 am edt fri apr 17 2026

.rest of today...east winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. areas of fog late in the morning. 
waves 1 to 3 feet building to 3 to 5 feet late in the afternoon. 
.tonight...east winds 15 to 20 knots becoming southeast 20 to
25 knots with gusts to around 30 knots after midnight. a chance
of showers and thunderstorms after midnight. waves 5 to 7 feet
building to 8 to 12 feet early in the morning. waves occasionally
around 15 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots becoming west 15 to 20 knots early in the afternoon.
showers likely and a chance of thunderstorms in the morning.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.saturday night...west winds 15 to 20 knots. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the evening. waves
8 to 12 feet. waves occasionally around 15 feet. 
.monday...northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and early afternoon...then becoming
southwest 10 to 15 knots early in the evening becoming south
15 to 20 knots by midnight. waves 5 to 7 feet subsiding to 3 to
5 feet in the late morning and early afternoon...then subsiding
to 1 to 3 feet early in the evening building to 5 to 7 feet by
midnight. waves occasionally around 10 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots early in the evening...
then becoming west 10 to 15 knots by midnight. waves 8 to 12 feet
subsiding to 4 to 6 feet by midnight. waves occasionally around
15 feet. 


$$

fzus63 kmkx 171949
glflm 
expires:202604180315;;539419

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180315-
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-
249 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.  

$$

fzus63 kmkx 171949
glflm 
expires:202604180315;;539418

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 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.


lmz261-362-364-366-563-565-567-868-180315-
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-
249 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.  

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539626

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. 

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539627

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.



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. 

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539628

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.



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. 

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539629

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.



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. 

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539630

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.



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. 

$$

fzus63 kmqt 172001
glfls 
expires:202604180800;;539631

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.



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. 

$$