fzus61 kbuf 010202
glflo 
expires:202605010900;;811482

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu apr 30 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...an elongated 29.7 inch low will gradually slide 
northeastward along the atlantic canada shoreline this evening.
this low will then retrograde northward and then northwestward 
across the canadian maritimes and quebec respectively friday and 
saturday. another 29.7 inch low will then deepen to 29.2 inches as 
it tracks from the southeastern states northeast off the atlantic 
coast saturday through sunday, while a 30.2 inch high ridges across 
the lower great lakes. a 29.1 inch low will then pinwheel 
counterclockwise about ontario, quebec, and hudson bay monday 
through tuesday night, sending an attendant cold front across the 
lake tuesday.


loz062-010900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu apr 30 2026

.overnight...northwest winds 5 to 10 knots becoming west.
waves 1 to 2 feet. 
.friday...west winds 5 to 10 knots. waves 1 foot or less. 
.friday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.saturday...northwest winds 5 to 10 knots becoming west. waves
1 foot or less. 
.saturday night...west winds 5 to 10 knots becoming northwest.
waves around 1 foot. 
.sunday...west winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of rain showers sunday
night. waves 1 to 2 feet building to 3 to 5 feet. 
.monday...southwest winds 15 to 25 knots increasing to 30 knots.
a chance of showers. waves 3 to 6 feet building to 5 to 8 feet.
waves occasionally around 10 feet. 
.tuesday...southwest winds 15 to 25 knots becoming east and
diminishing to 10 to 15 knots. a chance of showers. waves 4 to
7 feet subsiding to 1 to 3 feet. waves occasionally around
9 feet. 

$$

fzus61 kbuf 010202
glflo 
expires:202605010900;;811483

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu apr 30 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...an elongated 29.7 inch low will gradually slide 
northeastward along the atlantic canada shoreline this evening.
this low will then retrograde northward and then northwestward 
across the canadian maritimes and quebec respectively friday and 
saturday. another 29.7 inch low will then deepen to 29.2 inches as 
it tracks from the southeastern states northeast off the atlantic 
coast saturday through sunday, while a 30.2 inch high ridges across 
the lower great lakes. a 29.1 inch low will then pinwheel 
counterclockwise about ontario, quebec, and hudson bay monday 
through tuesday night, sending an attendant cold front across the 
lake tuesday.


loz063>065-010900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu apr 30 2026

.overnight...west winds 5 to 15 knots becoming northwest.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.friday night...west winds 5 to 10 knots. waves 1 foot or less. 
.saturday...west winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...west winds 5 to 10 knots becoming northwest.
waves 1 to 2 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots becoming south to
30 knots. a chance of showers. waves 2 to 4 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.tuesday...southwest winds 15 to 25 knots becoming south and
diminishing to 10 to 15 knots. a chance of showers. waves 4 to
7 feet subsiding to 1 to 3 feet. waves occasionally around
9 feet. 

$$

fzus61 kcle 010145
glfle 
expires:202605010815;;810981

open lake forecast for lake erie
national weather service cleveland oh
945 pm edt thu apr 30 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 averaging 29.90 inches will persist over lake erie through 
friday morning. low pressure 29.90 inches will pass to the south of 
the lake throughout the day on friday and high pressure 30.10 inches 
will build in south of the region for the weekend. low pressure 
29.70 inches will track through the northern great lakes on
monday, sweeping a cold front across lake erie.


lez162-163-010815-
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-
945 pm edt thu apr 30 2026

.rest of tonight...northwest winds 5 to 10 knots. a slight chance
of showers late this evening, then showers after midnight. waves
1 foot or less. 
.friday...north winds 5 to 10 knots becoming northwest. showers
likely early, then a chance of showers from late morning on.
waves 1 foot or less. 
.friday night...northwest winds 5 to 10 knots becoming north. a
chance of showers in the evening. waves 1 foot or less. 
.saturday...north winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.saturday night...northwest winds 5 to 10 knots becoming west.
waves 1 foot or less. 
.sunday...west winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers sunday night.
waves 1 to 3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots. a chance of showers and
thunderstorms. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest. a
chance of showers during the day, then showers likely tuesday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 010145
glfle 
expires:202605010815;;810982

open lake forecast for lake erie
national weather service cleveland oh
945 pm edt thu apr 30 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 averaging 29.90 inches will persist over lake erie through 
friday morning. low pressure 29.90 inches will pass to the south of 
the lake throughout the day on friday and high pressure 30.10 inches 
will build in south of the region for the weekend. low pressure 
29.70 inches will track through the northern great lakes on
monday, sweeping a cold front across lake erie.


lez164>166-010815-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
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-
945 pm edt thu apr 30 2026

.rest of tonight...northwest winds 10 knots or less. a slight
chance of showers after midnight. showers likely late. waves
1 foot or less. 
.friday...northeast winds 5 to 10 knots becoming northwest.
showers early, then a chance of showers. a slight chance of
showers late. waves 1 foot or less. 
.friday night...northwest winds 5 to 10 knots becoming north. a
chance of showers overnight. waves around 1 foot. 
.saturday...north winds 5 to 10 knots becoming northwest. waves
around 1 foot. 
.saturday night...northwest winds 5 to 10 knots becoming west.
waves around 1 foot. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers sunday night. waves 1 to 3 feet
building to 3 to 6 feet. 
.monday...southwest winds 15 to 25 knots. a chance of showers
during the day, then a chance of showers and thunderstorms monday
night. waves 3 to 6 feet subsiding to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots. a chance of showers
during the day, then showers likely tuesday night. waves 3 to
5 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 010145
glfle 
expires:202605010815;;810983

open lake forecast for lake erie
national weather service cleveland oh
945 pm edt thu apr 30 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 averaging 29.90 inches will persist over lake erie through 
friday morning. low pressure 29.90 inches will pass to the south of 
the lake throughout the day on friday and high pressure 30.10 inches 
will build in south of the region for the weekend. low pressure 
29.70 inches will track through the northern great lakes on
monday, sweeping a cold front across lake erie.


lez061-167>169-010815-
ripley to buffalo ny extending from 5nm 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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
945 pm edt thu apr 30 2026

.rest of tonight...west winds 10 knots or less becoming
northwest. a slight chance of showers late. waves 2 feet or less.
.friday...northwest winds 10 knots or less becoming west. a
chance of rain showers through early afternoon, then a slight
chance of rain showers late. waves 1 foot or less. 
.friday night...west winds 5 to 10 knots becoming north. waves
1 foot or less. 
.saturday...north winds 5 to 10 knots becoming west. waves 1 foot
or less. 
.saturday night...west winds 5 to 10 knots becoming northwest.
waves around 1 foot. 
.sunday...west winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
3 feet building to 3 to 6 feet. 
.monday...southwest winds 15 to 20 knots. a chance of showers
during the day, then a chance of showers and thunderstorms monday
night. waves 3 to 6 feet subsiding to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming south. a
chance of showers during the day, then showers likely tuesday
night. waves 3 to 5 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 010152
glfsc 
expires:202605011000;;811141

lake st clair forecast
national weather service detroit/pontiac mi
952 pm edt thu apr 30 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 slow moving low pressure system will continue to
impact the great lakes through the end of the week. this will
reinforce light north to northwest flow and will bring periodic
showers.


lcz460-011000-
lake st clair-
952 pm edt thu apr 30 2026

.rest of tonight...northeast winds 5 to 10 knots. partly cloudy 
with a chance of light showers. waves 2 feet or less.
.friday...north winds 5 to 10 knots. partly sunny. a chance of light
showers early in the morning. a chance of light showers in the
afternoon. waves 2 feet or less.
.friday night...north winds 5 to 10 knots. partly cloudy. a chance
of light showers early in the evening. waves 2 feet or less.
.saturday...northwest winds 5 to 10 knots. partly sunny. waves 2
feet or less.
.saturday night...north winds 5 to 10 knots veering to the east by
midnight...then veering to the west after midnight. partly cloudy.
waves 2 feet or less.
.sunday...west winds 10 to 15 knots becoming southwest 15 to 20
knots in the afternoon and evening. mostly sunny in the morning
becoming partly cloudy. waves 2 feet or less.
.monday...southwest winds 15 to 20 knots. partly cloudy. a chance of
showers and thunderstorms. waves 1 to 3 feet.
.tuesday...northwest winds 15 to 20 knots. mostly cloudy. light
showers likely and a chance of thunderstorms. waves 1 to 3 feet.

$$

fzus63 kdtx 010150
glflh 
expires:202605011000;;811116

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 pm edt thu apr 30 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 slow moving low pressure system will continue to
impact the great lakes through the end of the week. this will
reinforce light north to northwest flow and will bring periodic
rain showers.


lhz361-362-011000-
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-
950 pm edt thu apr 30 2026

.rest of tonight...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.friday...north winds 5 to 10 knots backing to the west late in
the afternoon. waves 1 to 3 feet. 
.friday night...northwest winds 10 to 15 knots. waves 2 to
4 feet. 
.saturday...northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.saturday night...west winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots increasing to 10 to
15 knots. waves 2 feet or less building to 3 to 5 feet. 
.monday...southwest winds 10 to 15 knots becoming south 15 to
20 knots. a chance of showers . waves 3 to 5 feet building to
6 to 9 feet . waves occasionally around 12 feet. 
.tuesday...west winds 15 to 20 knots decreasing to 10 to 15 knots
until early evening...then veering to the west 10 to 15 knots by
midnight. a chance of showers . waves 4 to 6 feet subsiding to
2 to 4 feet by midnight. waves occasionally around 8 feet. 


$$

fzus63 kdtx 010150
glflh 
expires:202605011000;;811117

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 pm edt thu apr 30 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 slow moving low pressure system will continue to
impact the great lakes through the end of the week. this will
reinforce light north to northwest flow and will bring periodic
rain showers.


lhz363-462>464-011000-
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-
950 pm edt thu apr 30 2026

.rest of tonight...north winds 5 to 10 knots backing to the west
after midnight. waves 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...north winds 5 to 10 knots becoming northwest
10 to 15 knots after midnight. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.saturday night...light and variable winds becoming southeast
5 to 10 knots by midnight...then veering to the southwest after
midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 4 to 6 feet. 
.tuesday...west winds 10 to 15 knots backing to the east early in
the evening...then becoming northeast 5 to 10 knots by midnight.
a chance of showers. waves 3 to 5 feet subsiding to 1 to 3 feet .
waves occasionally around 8 feet. 


$$

fzus63 kmkx 010203
glflm 
expires:202605010930;;811505

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt thu apr 30 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 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly, before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-010930-
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-
903 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi south...

.rest of tonight...east winds 5 to 10 kt becoming north 10 to
15 kt. numerous rain showers through early evening, then
scattered rain showers overnight. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.friday night...north winds 10 to 20 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.saturday night...south winds 10 to 15 kt becoming southwest
10 to 20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.sunday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt increasing to 30 kt. waves
3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.tuesday...northwest winds 10 to 15 kt veering to northeast.
chance of rain showers. waves 2 to 4 ft subsiding to 1 to 3 ft.  

$$

fzus63 kmkx 010203
glflm 
expires:202605010930;;811504

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt thu apr 30 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 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly, before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz261-362-364-366-563-565-567-868-010930-
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-
903 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northwest winds 10 to 15 kt becoming north.
scattered rain showers through early evening, then isolated rain
showers overnight. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
isolated rain showers in the afternoon. waves 1 to 3 ft. 
.friday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.saturday...northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.sunday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers in the morning. waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.monday...southwest winds to 30 kt. chance of rain showers. waves
4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811389

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz265-010800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu apr 30 2026

.rest of tonight...northwest winds 10 to 20 knots veering north
late. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots backing west late.
waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.monday...west winds 20 to 30 knots. a chance of rain showers.
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 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811390

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz266-010800-
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-
1001 pm edt thu apr 30 2026

.rest of tonight...north winds 10 to 20 knots. waves calm to
2 feet. 
.friday...north winds 10 to 20 knots backing northwest late.
waves building to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming south 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.monday...west winds 20 to 30 knots. a chance of rain showers.
waves building to 4 to 8 feet occasionally to 10 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811391

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz267-010800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu apr 30 2026

.rest of tonight...north winds 10 to 20 knots. a slight chance of
snow showers. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest late.
waves building to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots late. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...south winds 20 to 30 knots veering west. a chance of
rain showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811386

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu apr 30 2026 /901 pm cdt thu apr 30 2026/

.rest of tonight...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of rain showers by midnight.
waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering east in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering west after
midnight. a slight chance of rain showers. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.monday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. a chance of rain showers. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811387

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz263-010800-
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-
1001 pm edt thu apr 30 2026

.rest of tonight...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of rain and snow showers by
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering southwest
after midnight. a slight chance of rain showers after midnight.
waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday...west winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 
.tuesday...west winds 5 to 15 knots veering northwest. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202605010800;;811388

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches over lake 
superior until saturday morning as a 30.3 inch high slowly shifts 
east into northwest ontario and hudson bay. troughing of 29.7 inches 
then moves over the lake saturday night and deepens with time before 
a 29.3 inch low moves over the lake by monday. weak ridging of 29.8 
inches develops back over lake superior by tuesday in the wake of 
the low.



lsz264-010800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu apr 30 2026

.rest of tonight...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest late. waves
calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.monday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 
.tuesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$