fzus61 kbuf 190804
glflo 
expires:202604191500;;625231

open lake forecast for lake ontario
national weather service buffalo ny
404 am edt sun apr 19 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 30.4 inch high will then settle southeast across the 
great lakes 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. a warm front will then approach the lake by friday.


loz062-191500-
lake ontario open waters from the niagara river to hamlin beach-
404 am edt sun apr 19 2026

.today...west winds 10 to 15 knots. a chance of rain showers
early. a chance of rain showers late. waves 2 to 4 feet. 
.tonight...west winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of rain and snow showers early, then a chance
of rain showers late in the evening. waves 2 to 4 feet. 
.monday...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 5 to 15 knots becoming southwest
10 knots or less. waves 1 to 3 feet subsiding to 1 foot or less. 
.tuesday...south winds 5 to 15 knots becoming northeast. waves
1 to 3 feet. 
.wednesday...northeast winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.thursday...west winds 10 knots or less becoming east. waves
1 foot or less. 

$$

fzus61 kbuf 190804
glflo 
expires:202604191500;;625232

open lake forecast for lake ontario
national weather service buffalo ny
404 am edt sun apr 19 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 30.4 inch high will then settle southeast across the 
great lakes 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. a warm front will then approach the lake by friday.


loz063>065-191500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
404 am edt sun apr 19 2026

.today...west winds 10 to 15 knots increasing to 15 to 20 knots.
rain and snow showers likely early, then a chance of rain showers
late this morning. waves 2 to 4 feet building to 3 to 5 feet. 
.tonight...west winds 15 to 20 knots becoming northwest. a chance
of rain showers early, then a chance of rain and snow showers
late in the evening. waves 3 to 6 feet. 
.monday...northwest winds 15 to 20 knots becoming west. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast. waves
1 to 2 feet. 
.wednesday...northeast winds 10 knots or less becoming northwest.
waves 1 to 3 feet subsiding to 1 foot or less. 
.thursday...northwest winds 10 knots or less becoming east. waves
1 foot or less. 

$$

fzus61 kcle 190839
glfle 
expires:202604191415;;627021

open lake forecast for lake erie
national weather service cleveland oh
439 am edt sun apr 19 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...
another cold front moves across the lake this afternoon and
evening before high pressure 30.40 inches moves overhead sunday 
night into monday. another cold front will cross the lake tuesday 
night or early wednesday before high pressure returns wednesday 
and thursday.


lez162>164-191415-
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-
439 am edt sun apr 19 2026

.today...west winds 15 to 20 knots. a chance of showers late.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...northwest winds 15 to 20 knots becoming north 10 to
15 knots. a chance of rain showers in the evening. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming west less than
10 knots. waves 2 feet or less. 
.monday night...south winds 10 knots or less increasing to 15 to
20 knots. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet. 
.wednesday...north winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.thursday...south winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kcle 190839
glfle 
expires:202604191415;;627023

open lake forecast for lake erie
national weather service cleveland oh
439 am edt sun apr 19 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...
another cold front moves across the lake this afternoon and
evening before high pressure 30.40 inches moves overhead sunday 
night into monday. another cold front will cross the lake tuesday 
night or early wednesday before high pressure returns wednesday 
and thursday.


lez061-169-191415-
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-
439 am edt sun apr 19 2026

.today...west winds 10 to 15 knots increasing to 15 to 20 knots.
a slight chance of rain showers late. waves 2 to 4 feet building
to 3 to 5 feet. 
.tonight...west winds 10 to 15 knots becoming northwest. a chance
of rain and snow showers in the evening, then a slight chance of
snow showers after midnight. waves 2 to 4 feet. 
.monday...northwest winds around 10 knots becoming west. waves
1 to 2 feet. 
.monday night...west winds 5 to 10 knots becoming south. waves
around 1 foot. 
.tuesday...south winds 5 to 15 knots becoming southwest. waves
1 to 2 feet. 
.wednesday...north winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.thursday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 

$$

fzus61 kcle 190839
glfle 
expires:202604191415;;627022

open lake forecast for lake erie
national weather service cleveland oh
439 am edt sun apr 19 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...
another cold front moves across the lake this afternoon and
evening before high pressure 30.40 inches moves overhead sunday 
night into monday. another cold front will cross the lake tuesday 
night or early wednesday before high pressure returns wednesday 
and thursday.


lez165>168-191415-
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-
439 am edt sun apr 19 2026

.today...west winds 15 to 20 knots. a slight chance of rain
showers late. waves 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of rain showers early, then a chance of rain
showers with a slight chance of snow showers late in the evening.
waves 2 to 4 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves 1 to
3 feet. 
.monday night...southwest winds 5 to 15 knots becoming south.
waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of rain showers tuesday night. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 knots or less becoming southeast.
waves 1 to 3 feet subsiding to 1 foot or less. 
.thursday...southeast winds 5 to 15 knots becoming south. waves
1 to 3 feet. 

$$

fzus63 kdtx 190719
glfsc 
expires:202604191530;;623959

lake st clair forecast
national weather service detroit/pontiac mi
319 am edt sun apr 19 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...a weak disturbance brings rain and snow showers to
southeast michigan today. a secondary cold front will also push
across the region resulting in much colder temperatures tonight.
gusty west to northwest winds will persist through tonight. high
pressure will build across the region monday through early
tuesday preceding the next cold front set to pass through late
tuesday.


lcz460-191530-
lake st clair-
319 am edt sun apr 19 2026

...small craft advisory in effect from 10 am edt this morning
through this evening...

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

$$

fzus63 kdtx 190719
glflh 
expires:202604191530;;623927

open lake forecast for lake huron
national weather service detroit/pontiac mi
319 am edt sun apr 19 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...a weak disturbance brings rain and snow showers to
southeast michigan today. a secondary cold front will also push
across the region resulting in much colder temperatures tonight.
gusty west to northwest winds will persist through tonight. high
pressure will build across the region monday through early
tuesday preceding the next cold front set to pass through late
tuesday.


lhz361>363-191530-
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-
319 am edt sun apr 19 2026

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


$$

fzus63 kdtx 190719
glflh 
expires:202604191530;;623928

open lake forecast for lake huron
national weather service detroit/pontiac mi
319 am edt sun apr 19 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...a weak disturbance brings rain and snow showers to
southeast michigan today. a secondary cold front will also push
across the region resulting in much colder temperatures tonight.
gusty west to northwest winds will persist through tonight. high
pressure will build across the region monday through early
tuesday preceding the next cold front set to pass through late
tuesday.


lhz462>464-191530-
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-
319 am edt sun apr 19 2026

.today...west winds 10 to 15 knots. a chance of rain and snow
showers in the afternoon. waves 2 to 4 feet building to 3 to
5 feet late in the afternoon. 
.tonight...northwest winds 15 to 20 knots. a chance of snow
showers in the evening. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.monday night...southeast winds 5 to 10 knots becoming south
15 to 20 knots. waves 1 to 3 feet building to 4 to 6 feet. waves
occasionally around 8 feet. 
.tuesday...south winds 20 to 25 knots decreasing to 15 to
20 knots late in the morning...then decreasing to 10 to 15 knots
late in the afternoon backing to the south 10 to 15 knots late in
the evening. waves 6 to 9 feet subsiding to 2 to 4 feet. waves
occasionally around 12 feet. 
.wednesday...north winds 5 to 10 knots becoming light and
variable. waves 1 to 3 feet. 
.thursday...southeast winds 5 to 10 knots increasing to 10 to
15 knots . waves 1 to 3 feet building to 2 to 4 feet by midnight.


$$

fzus63 kmkx 190806
glflm 
expires:202604191545;;625463

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt sun apr 19 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...

high pressure around 30.4 inches tracking southeastward across
saskatchewan / manitoba will push a cold front across the lake
this morning, with southwest winds ahead of the front and 
northwest winds arriving behind it. some 20-30 kt gusts are 
expected behind the cold front for a brief period around or after 
noon today, particularly over far northern and southern portions 
of the lake. winds subside and veer north later today into tonight
as the aforementioned high pressure approaches. it crosses the 
lake late tonight into monday morning leading to light and 
variable winds. 

low pressure around 29.1 inches tracks along the southern edge of
hudson bay monday afternoon into tuesday, working with the
departing high pressure to drive breezy south winds over lake
michigan. our forecast calls for 30 kt gusts, but a few gales 
cannot be ruled out monday evening into early tuesday morning,
particularly over the northern third of the lake. 

a passing trough of low pressure leads to a period of variable
winds later tuesday. weak high pressure over ontario canada then
forces a weak backdoor cold front across the lake tuesday night
with light north to northeast winds continuing into wednesday
morning. 

winds should become southeast to south and increase later in the 
week as strong low pressure around 29.2 inches develops in the 
northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-191545-
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-
306 am cdt sun apr 19 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt becoming northwest. a few
gusts to 30 kt over far southern portions of the lake towards 
midday. chance of sprinkles this morning, then chance of rain 
showers this afternoon. waves 3 to 5 ft. 
.tonight...north winds 10 to 20 kt becoming northeast 5 to 10 kt.
waves 2 to 4 ft. 
.monday...northeast winds 5 to 10 kt veering to south late in the
morning, then increasing to 10 to 20 kt early in the afternoon
becoming southeast late. waves 1 to 3 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 15 to 25 kt. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday night...west winds 10 to 15 kt veering to north. waves
2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt becoming north 5 to
10 kt. waves 1 to 3 ft. 
.thursday...south winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft building to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 190806
glflm 
expires:202604191545;;625462

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt sun apr 19 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...

high pressure around 30.4 inches tracking southeastward across
saskatchewan / manitoba will push a cold front across the lake
this morning, with southwest winds ahead of the front and 
northwest winds arriving behind it. some 20-30 kt gusts are 
expected behind the cold front for a brief period around or after 
noon today, particularly over far northern and southern portions 
of the lake. winds subside and veer north later today into tonight
as the aforementioned high pressure approaches. it crosses the 
lake late tonight into monday morning leading to light and 
variable winds. 

low pressure around 29.1 inches tracks along the southern edge of
hudson bay monday afternoon into tuesday, working with the
departing high pressure to drive breezy south winds over lake
michigan. our forecast calls for 30 kt gusts, but a few gales 
cannot be ruled out monday evening into early tuesday morning,
particularly over the northern third of the lake. 

a passing trough of low pressure leads to a period of variable
winds later tuesday. weak high pressure over ontario canada then
forces a weak backdoor cold front across the lake tuesday night
with light north to northeast winds continuing into wednesday
morning. 

winds should become southeast to south and increase later in the 
week as strong low pressure around 29.2 inches develops in the 
northern plains.


lmz261-362-364-366-563-565-567-868-191545-
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-
306 am cdt sun apr 19 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 15 to 25 kt veering north late. waves 3 
to 5 ft.
.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...northwest winds 5 to 10 kt becoming southwest 10 to
15 kt late in the morning, then increasing to 10 to 20 kt early
in the afternoon becoming south 15 to 25 kt late. waves 1 to 3 ft
building to 2 to 4 ft. 
.monday night...south winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.tuesday...southwest 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. 
.tuesday night...northeast winds 10 to 15 kt. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.wednesday...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.thursday...south winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft building to 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625052

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz265-192000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt sun apr 19 2026

.early this morning...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...northwest winds 20 to 30 knots. flurries. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. flurries. waves subsiding to 1 to
3 feet. 
.monday...west winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.monday night...south winds 20 to 30 knots veering southwest
after midnight. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.tuesday...northwest winds 10 to 20 knots veering north by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday...southeast winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625053

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz266-192000-
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 am edt sun apr 19 2026

.early this morning...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible. waves 8 to 11 feet occasionally
to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. 
.today...northwest winds 20 to 30 knots. a chance of snow
showers. waves subsiding to 6 to 9 feet occasionally to 11 feet. 
.tonight...northwest winds 15 to 25 knots veering north after
midnight, then becoming northwest 10 to 20 knots late. flurries.
waves subsiding to 2 to 4 feet. 
.monday...west winds 10 to 20 knots backing southwest in the
afternoon, then becoming south 15 to 25 knots late. 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 5 to 9 feet occasionally to 11 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots veering east after
midnight. 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 6 feet occasionally to 8 feet. 
.thursday...southeast winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 8 to
11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625050

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz263-192000-
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 am edt sun apr 19 2026

.early this morning...northwest winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. flurries by mid afternoon. waves
subsiding to 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then backing northwest late. flurries
through midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon, then backing south late. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding 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...northwest winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...southwest winds less than 10 knots backing
southeast after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. a chance of rain showers. waves building to 7 to
10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625049

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun apr 19 2026 /300 am cdt sun apr 19 2026/

.early this morning...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon. waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.tuesday...northwest winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming northeast 10 to
20 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday...east winds 10 to 20 knots increasing to 20 to
30 knots. a chance of rain showers, then rain showers likely.
waves subsiding to 3 to 5 feet occasionally to 7 feet, then
building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625054

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz267-192000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt sun apr 19 2026

.early this morning...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible. flurries. waves 8 to 11 feet
occasionally to 14 feet subsiding to 7 to 10 feet occasionally to
13 feet. 
.today...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. a chance
of snow showers. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.tonight...northwest winds 20 to 30 knots becoming north 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
a chance of snow showers. waves subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing south late. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. waves building to 4 to 8 feet occasionally to 10 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 15 to
25 knots. waves building to 2 to 4 feet. 
.thursday...southeast winds 15 to 25 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202604192000;;625051

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun apr 19 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...

ridging builds over the lake today, strengthening to 30.3 inches by 
tonight and remaining into monday morning. this ridging gives way to 
29.8 inch troughing monday night into tuesday morning as a weakening 
low swings from hudson bay towards northern quebec. high pressure 
builds back in over lake superior to 30.0 to 30.1 inches tuesday 
night into wednesday morning. the high shifts east on wednesday as 
29.2 inch low pressure develops over the northern plains. the low 
deepens to 29.1 inches on thursday over north dakota, then moves 
north into southern manitoba thursday night into friday. this sends 
a 29.5 inch trough across the lake thursday night through friday.



lsz264-192000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt sun apr 19 2026

.early this morning...northwest winds 15 to 25 knots. waves 5 to
8 feet occasionally to 10 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then backing northwest late. flurries.
waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon, then backing south late. waves
building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south winds 15 to 25 knots veering west after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...west winds less than 10 knots backing southeast
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday...southeast winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 8 to
11 feet occasionally to 14 feet. 

$$