fzus61 kbuf 192010
glflo 
expires:202604200300;;654101

open lake forecast for lake ontario
national weather service buffalo ny
409 pm 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...elongated low pressure draped from eastern canada to the 
southern new england coastline and averaging 29.7 inches will slide 
further eastward this evening...with a trailing secondary cold front 
crossing the lake this evening. behind this front, a 30.4 inch high 
will 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>065-200300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
409 pm edt sun apr 19 2026

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

$$

fzus61 kbuf 192010
glflo 
expires:202604200300;;654100

open lake forecast for lake ontario
national weather service buffalo ny
409 pm 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...elongated low pressure draped from eastern canada to the 
southern new england coastline and averaging 29.7 inches will slide 
further eastward this evening...with a trailing secondary cold front 
crossing the lake this evening. behind this front, a 30.4 inch high 
will 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.


loz062-200300-
lake ontario open waters from the niagara river to hamlin beach-
409 pm edt sun apr 19 2026

.tonight...west winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of rain and snow showers this evening. a
chance of snow showers late. waves 2 to 4 feet. 
.monday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 5 to 15 knots becoming south
10 knots or less. waves 1 to 3 feet subsiding to 1 foot or less. 
.tuesday...south winds 10 to 15 knots becoming southeast. waves
1 to 3 feet. 
.tuesday night...southeast winds 5 to 10 knots becoming
northeast. waves 2 feet or less. 
.wednesday...northeast winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.thursday...east winds 10 knots or less. waves 1 foot or less. 
.friday...east winds 10 to 15 knots increasing to 15 to 20 knots.
a chance of showers. waves 1 to 3 feet. 

$$

fzus61 kcle 191948
glfle 
expires:202604200230;;653045

open lake forecast for lake erie
national weather service cleveland oh
348 pm 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...
a trough moves across lake erie this evening before high pressure
30.40 inches builds across the lake tonight into monday. another 
cold front crosses the lake tuesday night before high pressure 
returns wednesday and thursday. this high drifts toward the mid 
atlantic friday ahead of another cold front for next weekend.


lez061-169-200230-
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 sun apr 19 2026

.tonight...west winds 10 to 15 knots becoming northwest. rain and
snow showers likely this evening, then a chance of snow showers
after midnight. waves 2 to 4 feet. 
.monday...northwest winds 5 to 10 knots becoming west. a slight
chance of snow showers through early afternoon. waves 1 to
2 feet. 
.monday night...west winds 5 to 10 knots becoming south. waves
around 1 foot. 
.tuesday...south winds 10 to 15 knots. waves 1 to 2 feet. 
.tuesday night...south winds 5 to 10 knots becoming southwest.
waves 1 to 2 feet. 
.wednesday...northwest winds less than 10 knots. waves 2 feet or
less. 
.thursday...light and variable winds becoming southeast 5 to
10 knots. waves 1 foot or less. 
.friday...east winds 5 to 10 knots. a chance of showers. waves
1 foot or less. 

$$

fzus61 kcle 191948
glfle 
expires:202604200230;;653043

open lake forecast for lake erie
national weather service cleveland oh
348 pm 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...
a trough moves across lake erie this evening before high pressure
30.40 inches builds across the lake tonight into monday. another 
cold front crosses the lake tuesday night before high pressure 
returns wednesday and thursday. this high drifts toward the mid 
atlantic friday ahead of another cold front for next weekend.


lez162>164-200230-
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 sun apr 19 2026

.tonight...northwest winds 15 to 25 knots becoming north and
diminishing to 10 to 15 knots. a chance of rain showers through
the early overnight, then a slight chance of rain and snow
showers late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots becoming northwest less than
10 knots. a slight chance of snow showers in the morning. waves
2 feet or less. 
.monday night...south winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 1 to 3 feet. 
.tuesday night...southwest winds 10 to 15 knots becoming west. a
chance of showers. waves 1 to 2 feet. 
.wednesday...north winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.thursday...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.friday...south winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of showers. waves 1 to 3 feet. 

$$

fzus61 kcle 191948
glfle 
expires:202604200230;;653044

open lake forecast for lake erie
national weather service cleveland oh
348 pm 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...
a trough moves across lake erie this evening before high pressure
30.40 inches builds across the lake tonight into monday. another 
cold front crosses the lake tuesday night before high pressure 
returns wednesday and thursday. this high drifts toward the mid 
atlantic friday ahead of another cold front for next weekend.


lez165>168-200230-
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 sun apr 19 2026

.tonight...west winds 15 to 20 knots becoming north 10 to
15 knots. rain and snow showers likely this evening, then a
chance of snow and rain showers after midnight. waves 2 to
4 feet. 
.monday...northwest winds 5 to 15 knots becoming west. a slight
chance of snow showers through early afternoon. waves 1 to
3 feet. 
.monday night...southwest winds 10 knots or less becoming south
10 to 15 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots becoming west. a
chance of showers. waves 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 10 knots or less increasing to 10 to
15 knots. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots becoming north 15 to
20 knots. a chance of showers during the day, then showers likely
friday night. waves 1 to 3 feet. 

$$

fzus63 kdtx 191933
glfsc 
expires:202604200400;;652530

lake st clair forecast
national weather service detroit/pontiac mi
333 pm 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 the
area today. a cold front also pushes across the region resulting
in gusty northwest winds that persist through tonight. high
pressure will build in monday through early tuesday, preceding
the next cold front set to pass through late tuesday.


lcz460-200400-
lake st clair-
333 pm edt sun apr 19 2026

...small craft advisory in effect until 10 pm edt this evening...

.tonight...northwest winds 15 to 20 knots diminishing to 10 to 15
knots after midnight. gusts to 25 knots. partly cloudy. a chance 
of light showers early in the evening. waves 1 to 3 feet.
.monday...northwest winds 10 to 15 knots becoming light and
variable. 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. partly cloudy. waves 2 feet
or less.
.tuesday...south winds 15 to 20 knots. partly sunny. waves 1 to 3
feet.
.tuesday night...southwest winds 10 to 15 knots becoming west 5 to
10 knots by midnight...then veering to the northwest after midnight.
partly cloudy. waves 2 feet or less.
.wednesday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming northeast 5 to 10 knots in the evening.
mostly sunny in the morning becoming clear. waves 2 feet or less.
.thursday...southeast winds 10 to 15 knots. mostly clear. waves 2
feet or less.
.friday...southwest winds 15 to 20 knots. partly cloudy. a chance of
light showers. waves 1 to 3 feet.

$$

fzus63 kdtx 191932
glflh 
expires:202604200400;;652527

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm 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 the
area today. a cold front also pushes across the region resulting
in gusty northwest winds that persist through tonight. high
pressure will build in monday through early tuesday, preceding
the next cold front set to pass through late tuesday.


lhz361>363-200400-
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-
332 pm edt sun apr 19 2026

.tonight...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 decreasing to 5 to
10 knots late in the morning...then backing to the west early in
the afternoon veering to the west 5 to 10 knots late in the
afternoon. waves 3 to 5 feet subsiding to 1 to 3 feet late in the
afternoon. 
.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 4 to 6 feet in the late evening and overnight.
waves occasionally around 8 feet. 
.tuesday...south winds 15 to 20 knots decreasing to 10 to
15 knots early in the afternoon. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.tuesday night...north winds 5 to 10 knots. waves 3 to 5 feet
subsiding to 1 to 3 feet after midnight. 
.wednesday...north winds 5 to 10 knots becoming light and
variable...then becoming east 5 to 10 knots late in the evening.
waves 2 feet or less. 
.thursday...southeast winds 10 to 15 knots becoming east 15 to
20 knots . waves 2 to 4 feet building to 5 to 7 feet . waves
occasionally around 10 feet. 
.friday...southeast winds 20 to 25 knots decreasing to 15 to
20 knots until early evening...then backing to the east by
midnight. a chance of showers. waves 6 to 9 feet. waves
occasionally around 12 feet. 


$$

fzus63 kdtx 191932
glflh 
expires:202604200400;;652528

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm 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 the
area today. a cold front also pushes across the region resulting
in gusty northwest winds that persist through tonight. high
pressure will build in monday through early tuesday, preceding
the next cold front set to pass through late tuesday.


lhz462>464-200400-
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-
332 pm edt sun apr 19 2026

.tonight...northwest winds 15 to 20 knots. gusts to 30 knots in
the evening. 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 becoming north 5 to
10 knots in the afternoon. waves 4 to 6 feet subsiding to 2 to
4 feet late in the afternoon. 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 3 to 5 feet in the
late evening and overnight. 
.tuesday...south winds 15 to 20 knots decreasing to 10 to
15 knots early in the afternoon. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.tuesday night...south winds 5 to 10 knots backing to the north
in the late evening and overnight. waves 2 to 4 feet subsiding to
1 to 3 feet in the late evening and overnight. 
.wednesday...north winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.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.
.friday...southeast winds 15 to 20 knots decreasing to 10 to
15 knots . a chance of showers. waves 3 to 5 feet. 


$$

fzus63 kmkx 191945
glflm 
expires:202604200315;;652945

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 pm 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 is expected to shift southeast 
across the region tonight into monday morning, then shift 
southeast in the afternoon. gusty north to northwest winds are 
expected into early evening, before weakening tonight into monday.

increasing south winds are expected later monday afternoon into 
monday night, as the high moves further southeast of the region. a
few gales may occur monday night into early tuesday morning, 
particularly over the northern third of the lake.

a backdoor cold front should then move southward across lake 
michigan tuesday afternoon and evening, shifting winds to the 
northeast behind it. high pressure around 30.4 inches to the 
northeast of the region wednesday should bring lighter winds to 
the area.

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. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-200315-
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-
245 pm cdt sun apr 19 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 10 to 20 kt becoming northeast 5 to 10 kt.
scattered sprinkles this evening. 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. waves
4 to 7 ft occasionally to 9 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...southwest winds 10 to 15 kt veering to north.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday...northeast winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday night...east winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.thursday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.friday...south winds to 30 kt becoming southwest 10 to 20 kt.
showers likely. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 191945
glflm 
expires:202604200315;;652944

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 pm 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 is expected to shift southeast 
across the region tonight into monday morning, then shift 
southeast in the afternoon. gusty north to northwest winds are 
expected into early evening, before weakening tonight into monday.

increasing south winds are expected later monday afternoon into 
monday night, as the high moves further southeast of the region. a
few gales may occur monday night into early tuesday morning, 
particularly over the northern third of the lake.

a backdoor cold front should then move southward across lake 
michigan tuesday afternoon and evening, shifting winds to the 
northeast behind it. high pressure around 30.4 inches to the 
northeast of the region wednesday should bring lighter winds to 
the area.

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. 


lmz261-362-364-366-563-565-567-868-200315-
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-
245 pm cdt sun apr 19 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. scattered flurries this evening. waves 3 to 5 ft subsiding
to 2 to 4 ft. 
.monday...northwest winds 5 to 10 kt becoming west 10 to 15 kt
late in the morning, then becoming southwest 10 to 20 kt early in
the afternoon becoming south 15 to 25 kt late. waves 1 to 3 ft
building to 3 to 5 ft. 
.monday night...south winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
.tuesday...southwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. waves 4 to 7 ft occasionally to 9 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.tuesday night...northeast winds 5 to 10 kt increasing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...northeast winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 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. 
.friday...south winds to 30 kt becoming southwest 15 to 25 kt.
chance of rain showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653302

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz265-200800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt sun apr 19 2026

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

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653303

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz266-200800-
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 sun apr 19 2026

...gale watch in effect from monday evening through late monday
night...

.late this afternoon...northwest winds 20 to 30 knots. a chance
of snow showers. waves 6 to 9 feet occasionally to 11 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight, then backing northwest late. a chance of
snow showers. waves subsiding to 1 to 3 feet. 
.monday...west winds 10 to 20 knots backing southwest in the
afternoon, then becoming south 20 to 30 knots late. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.monday night...south gales to 35 knots becoming southwest 20 to
30 knots late. waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 15 to 25 knots. waves building
to 3 to 6 feet occasionally to 8 feet. 
.thursday...southeast gales to 40 knots. rain showers likely and
a chance of thunderstorms. waves building to 9 to 12 feet
occasionally to 15 feet. 
.friday...south gales to 35 knots diminishing to 20 to 30 knots.
a chance of rain showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653304

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz267-200800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt sun apr 19 2026

...gale watch in effect from monday evening through tuesday
morning...

.late this afternoon...northwest gales to 35 knots. a chance of
snow showers. waves 6 to 10 feet occasionally to 13 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 becoming southwest 10 to
20 knots in the afternoon, then becoming south 15 to 25 knots
late. flurries through early afternoon. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.monday night...south gales to 35 knots becoming southwest 20 to
30 knots late. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.thursday...southeast winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 6 to
10 feet occasionally to 13 feet. 
.friday...southeast winds 20 to 30 knots becoming south 15 to
25 knots. a chance of rain showers. waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653299

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun apr 19 2026 /300 pm cdt sun apr 19 2026/

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

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653300

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz263-200800-
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 sun apr 19 2026

.late this afternoon...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then backing northwest late. waves subsiding to calm to
2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon, then becoming south 20 to 30 knots
late. a slight chance of rain and snow showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight, then becoming west 10 to 20 knots
late. waves building to 3 to 6 feet occasionally to 8 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 less than 10 knots becoming east
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots veering southeast
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.thursday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. rain showers likely. waves building to 8 to 11 feet
occasionally to 14 feet. 
.friday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. a chance of rain showers. waves subsiding to 5 to
8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202604200800;;653301

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over the minnesota/north dakota line this evening 
will build to 30.4 inches over lake michigan monday morning. as the 
high shifts to the lower great lakes monday night, a 29.4 inch low 
over western hudson bay will bring a 29.8 inch trough to the western 
end of the lake. tuesday, the low weakens to 29.6 inches over the 
hudson bay shores as the surface front weakens to 29.9 inches 
throughout its passage over lake superior. 30.1 inch high pressure 
then builds over northern ontario for tuesday night. wednesday, a 
29.2 inch low forms over eastern montana, weakening to 29.3 inches 
over lake winnipeg through friday morning as it sends a 29.6 inch 
trough over the western half of lake superior. the trough fully 
passes over the lake by friday night with the low weakening further 
to 29.6 inches, stationary over southern manitoba.



lsz264-200800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt sun apr 19 2026

.late this afternoon...northwest winds 10 to 20 knots. a chance
of snow showers. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then backing northwest late. a chance of snow showers
through midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming south 15 to 25 knots
late. a slight chance of rain and snow showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight, then becoming west 15 to 25 knots
late. 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. waves calm to 2 feet.
.wednesday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...southeast winds 20 to 30 knots increasing to gales to
35 knots. rain showers likely and a chance of thunderstorms.
waves building to 9 to 12 feet occasionally to 15 feet. 
.friday...south gales to 35 knots becoming southwest 20 to
30 knots. a chance of rain showers. waves subsiding to 5 to
8 feet occasionally to 10 feet. 

$$