fzus61 kbuf 220203
glflo 
expires:202607220900;;382466

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue jul 21 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 29.3 inch low will be near james bay with multiple frontal 
boundaries crossing the lake through tonight. a secondary cold 
front will cross the lake wednesday, with a 30.2 inch high 
building across the lower great lakes region wednesday night 
through friday. the high will move off the east coast saturday.


loz063>065-220900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt tue jul 21 2026

.rest of tonight...west winds 15 to 25 knots. showers with a
chance of thunderstorms late this evening, then a chance of
showers after midnight. some thunderstorms may produce gusty
winds late this evening. waves 2 to 4 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.wednesday...west winds 20 to 25 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.wednesday night...west winds 15 to 25 knots diminishing to 5 to
15 knots. waves 5 to 8 feet subsiding to 1 to 3 feet. waves
occasionally around 10 feet. 
.thursday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. waves 2 feet or
less. 
.friday...south winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 5 to 15 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
during the day, then showers likely sunday night. waves 2 feet or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 220203
glflo 
expires:202607220900;;382465

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue jul 21 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 29.3 inch low will be near james bay with multiple frontal 
boundaries crossing the lake through tonight. a secondary cold 
front will cross the lake wednesday, with a 30.2 inch high 
building across the lower great lakes region wednesday night 
through friday. the high will move off the east coast saturday.


loz062-220900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt tue jul 21 2026

.rest of tonight...west winds 15 to 20 knots. a chance of showers
and thunderstorms late this evening, then a chance of showers
after midnight. some thunderstorms may produce gusty winds late
this evening. waves 3 to 6 feet. 
.wednesday...west winds 15 to 25 knots. waves 3 to 6 feet. 
.wednesday night...northwest winds 15 to 20 knots becoming west
and diminishing to around 10 knots. waves 3 to 5 feet subsiding
to 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.thursday night...southwest winds 10 knots or less. waves 1 foot
or less. 
.friday...south winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots becoming west. a chance
of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 220147
glfle 
expires:202607220830;;381894

open lake forecast for lake erie
national weather service cleveland oh
947 pm edt tue jul 21 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 linger over the lower great 
lakes through wednesday evening. high pressure 30.20 inches builds
into the region early thursday and drifts to the east through 
saturday.


lez164>167-220830-
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-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
947 pm edt tue jul 21 2026

.rest of tonight...northwest winds 15 to 20 knots. a chance of
showers and thunderstorms, then a slight chance of showers late.
waves 3 to 6 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a slight chance of showers through early afternoon.
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming north.
waves 1 to 3 feet. 
.thursday...north winds 10 knots or less. waves 1 foot or less. 
.thursday night...east winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.sunday...southwest winds 10 to 15 knots. a chance of showers
during the day, then showers likely with a chance of
thunderstorms sunday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 220147
glfle 
expires:202607220830;;381893

open lake forecast for lake erie
national weather service cleveland oh
947 pm edt tue jul 21 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 linger over the lower great 
lakes through wednesday evening. high pressure 30.20 inches builds
into the region early thursday and drifts to the east through 
saturday.


lez162-163-220830-
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-
947 pm edt tue jul 21 2026

.rest of tonight...northwest winds 15 to 25 knots. a slight
chance of showers and thunderstorms late this evening. waves 2 to
4 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.wednesday night...northwest winds 5 to 10 knots becoming north.
waves 1 foot or less. 
.thursday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.thursday night...southeast winds 10 knots or less. waves 1 foot
or less. 
.friday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.sunday...west winds around 10 knots. a chance of showers and
thunderstorms. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 220147
glfle 
expires:202607220830;;381895

open lake forecast for lake erie
national weather service cleveland oh
947 pm edt tue jul 21 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 linger over the lower great 
lakes through wednesday evening. high pressure 30.20 inches builds
into the region early thursday and drifts to the east through 
saturday.


lez061-168-169-220830-
ripley to buffalo ny extending from 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-
947 pm edt tue jul 21 2026

.rest of tonight...west winds 15 to 20 knots becoming northwest.
a chance of showers and thunderstorms late this evening, then a
chance of showers with a slight chance of thunderstorms after
midnight. a slight chance of showers late. waves 3 to 5 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a slight chance of showers. waves 3 to 5 feet subsiding
to 2 to 4 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.thursday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.thursday night...southwest winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...southeast winds 10 knots or less. waves 1 foot or less.
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
during the day, then showers likely with a chance of
thunderstorms sunday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 220158
glfsc 
expires:202607221000;;382248

lake st clair forecast
national weather service detroit/pontiac mi
958 pm edt tue jul 21 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...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lcz460-221000-
lake st clair-
958 pm edt tue jul 21 2026

.rest of tonight...northwest winds around 20 knots. partly cloudy.
waves 1 to 3 feet.
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to 15
knots in the afternoon. mostly sunny. waves 1 to 3 feet.
.wednesday night...northwest winds 10 to 15 knots becoming north 5
to 10 knots in the late evening and overnight. mostly clear. waves 2
feet or less.
.thursday...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming east 5 to 10 knots early in the
afternoon. sunny. waves 2 feet or less.
.thursday night...southeast winds 5 to 10 knots becoming light and
variable. clear. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to 10 knots
in the afternoon and evening. mostly sunny becoming sunny in the
afternoon becoming mostly clear. waves 2 feet or less.
.saturday...south winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.sunday...south winds 10 to 15 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 220155
glflh 
expires:202607221000;;382105

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt tue jul 21 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...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz462>464-221000-
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-
955 pm edt tue jul 21 2026

.rest of tonight...northwest winds 20 to 25 knots. gusts to around
30 knots. waves 8 to 12 feet. waves occasionally around 15 feet.
.wednesday...northwest winds 20 to 25 knots decreasing to 10 to
15 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.wednesday night...northwest winds 10 to 15 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.thursday...west winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.thursday night...southeast winds 5 to 10 knots veering to the
south in the late evening and overnight. waves 2 feet or less. 
.friday...south winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots by midnight. a chance of. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
early in the evening...then backing to the southeast 5 to
10 knots by midnight. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 220155
glflh 
expires:202607221000;;382103

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt tue jul 21 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...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz361-221000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
955 pm edt tue jul 21 2026

.rest of tonight...northwest winds 20 to 25 knots with gusts to
around 30 knots. waves 8 to 12 feet. waves occasionally around
15 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the afternoon.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.wednesday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and overnight. waves 4 to
6 feet subsiding to 2 to 4 feet after midnight. waves
occasionally around 8 feet. 
.thursday...west winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then decreasing to 5 to
10 knots early in the afternoon. waves 1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots. waves 1 to
3 feet. 
.friday...southwest winds 10 to 15 knots becoming south 5 to
10 knots late in the morning...then backing to the southeast late
in the afternoon veering to the south late in the evening. waves
1 to 3 feet building to 2 to 4 feet late in the afternoon. 
.saturday...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the late morning and early afternoon...then backing
to the southeast early in the evening veering to the south by
midnight. showers likely by midnight. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots. showers likely early in the
morning. waves 1 to 3 feet. 


$$

fzus63 kdtx 220155
glflh 
expires:202607221000;;382104

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt tue jul 21 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...high pressure fills into the great lakes region today,
providing dry and subsiding northwest flow for the rest of the
week.


lhz362-363-221000-
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-
955 pm edt tue jul 21 2026

.rest of tonight...northwest winds to around 30 knots decreasing 
to 20 to 25 knots early in the morning. waves 10 to 14 feet. waves
occasionally around 18 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the afternoon.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.wednesday night...northwest winds 15 to 20 knots with gusts to
around 30 knots decreasing to 10 to 15 knots in the late evening
and overnight. waves 4 to 6 feet. 
.thursday...west winds 5 to 10 knots backing to the south early
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon. waves occasionally around 8 feet.
.thursday night...south winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. waves 1 to 3 feet building to
2 to 4 feet late in the afternoon. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots . a chance of showers by midnight. waves 1 to 3 feet
building to 2 to 4 feet . 
.sunday...southwest winds 5 to 10 knots backing to the east early
in the evening...then increasing to 10 to 15 knots by midnight. a
chance of showers early in the morning. a chance of showers .
waves 1 to 3 feet. 


$$

fzus63 kmkx 220123
glflm 
expires:202607220915;;381351

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
823 pm cdt tue jul 21 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...

gusty north winds continue late this evening across the open waters 
behind a departing cold front. gusts are expected to remain at or 
below 30 kts across the majority of the lake, though a few gusts 
approaching gale force remain possible through the predawn hours 
over the northeast half of the waters. winds will steadily subside 
through the day wednesday as 30.1 inch high pressure builds into 
the northern mississippi river valley from the great plains. the 
high will cross southern lake michigan thursday morning, 
progressing into the northeastern united states thursday night 
into friday. progression of the high will result in a south to 
southwest wind shift across the waters.

29.5 inch low pressure will move quickly from the canadian great 
plains toward quebec friday through saturday, maintaining south to
southwest winds over lake michigan. the low will attempt to pull 
a cold front into the western great lakes by sunday, with the 
boundary slowly advancing south across the waters through monday. 
the approaching/passing front will result in returning 
thunderstorm chances saturday night through monday, in addition to
a northerly wind shift by monday afternoon.


lmz261-362-364-366-563-565-567-868-220915-
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-
823 pm cdt tue jul 21 2026

sheboygan wi to pentwater mi north...

.rest of tonight...north winds to 30 kt becoming northwest. waves
8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.wednesday night...northwest winds 15 to 25 kt becoming west
10 to 15 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...west winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 1 to 3 ft. 
.thursday night...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...south winds 15 to 25 kt becoming southwest. waves
2 to 4 ft. 
.saturday...southwest winds to 30 kt becoming south. waves 3 to
5 ft building to 4 to 6 ft occasionally to 8 ft. 
.sunday...west winds 10 to 20 kt becoming southwest 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 220123
glflm 
expires:202607220915;;381352

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
823 pm cdt tue jul 21 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...

gusty north winds continue late this evening across the open waters 
behind a departing cold front. gusts are expected to remain at or 
below 30 kts across the majority of the lake, though a few gusts 
approaching gale force remain possible through the predawn hours 
over the northeast half of the waters. winds will steadily subside 
through the day wednesday as 30.1 inch high pressure builds into 
the northern mississippi river valley from the great plains. the 
high will cross southern lake michigan thursday morning, 
progressing into the northeastern united states thursday night 
into friday. progression of the high will result in a south to 
southwest wind shift across the waters.

29.5 inch low pressure will move quickly from the canadian great 
plains toward quebec friday through saturday, maintaining south to
southwest winds over lake michigan. the low will attempt to pull 
a cold front into the western great lakes by sunday, with the 
boundary slowly advancing south across the waters through monday. 
the approaching/passing front will result in returning 
thunderstorm chances saturday night through monday, in addition to
a northerly wind shift by monday afternoon.


lmz080-669-671-673-675-777-779-870-872-874-876-878-220915-
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-
823 pm cdt tue jul 21 2026

sheboygan wi to pentwater mi south...

.rest of tonight...north winds to 30 kt diminishing to 15 to
25 kt. waves 7 to 10 ft occasionally to 13 ft building to 8 to
11 ft occasionally to 14 ft, then subsiding to 7 to 10 ft
occasionally to 13 ft. 
.wednesday...north winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.wednesday night...north winds 10 to 20 kt becoming northwest
10 to 15 kt late in the evening, then diminishing to 5 to 10 kt
after midnight increasing to 10 to 15 kt late. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday...west winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.saturday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.sunday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382407

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz265-220800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt tue jul 21 2026

.rest of tonight...northwest winds 20 to 30 knots diminishing to
15 to 25 knots late. waves 3 to 6 feet occasionally to 8 feet
subsiding to 2 to 4 feet. 
.wednesday...northwest winds 15 to 25 knots becoming west 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots increasing to 15 to
25 knots late. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a slight chance of showers and
thunderstorms after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of showers after
midnight. waves building to 2 to 4 feet. 
.saturday...southwest winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...east winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382408

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz266-220800-
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 tue jul 21 2026

.rest of tonight...northwest winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...northwest winds 15 to 25 knots backing west late.
waves subsiding to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.thursday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. a slight
chance of thunderstorms after midnight. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves building to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 5 to
15 knots. showers likely. a chance of thunderstorms. a chance of
showers. waves subsiding to calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382409

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz267-220800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt tue jul 21 2026

.rest of tonight...northwest winds 20 to 30 knots. waves 5 to
8 feet occasionally to 10 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 15 to
25 knots late. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.wednesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a slight chance of showers after
midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...northwest winds 10 to 20 knots becoming southeast 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382406

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz264-220800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt tue jul 21 2026

.rest of tonight...northwest winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves building to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of showers and a slight
chance of thunderstorms. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. waves subsiding to 2 to
4 feet, then building to 4 to 7 feet occasionally to 9 feet. 
.saturday...southwest winds 20 to 30 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...southeast winds 5 to 15 knots backing east. waves calm
to 2 feet. 

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382405

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz263-220800-
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 tue jul 21 2026

.rest of tonight...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon, then becoming southwest 10 to 20 knots late. waves
building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.thursday...southwest winds 15 to 25 knots. waves building to
2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of showers and
thunderstorms. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 
.friday...southwest winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of showers after
midnight. waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.saturday...southwest gales to 35 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 220201
glfls 
expires:202607220800;;382404

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue jul 21 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... 

heights continue to rise over the lake tonight as a 29.3 inch low 
pressure east of james bay continues to track through northern 
quebec and ridging over the northern plains expands eastward. the 
ridge over lake superior becomes maximized at 30.1 inches over the 
western lake on wednesday before the high flattens and moves east 
towards new england thursday into friday morning. while ridging of 
around 30.0 inches looks to remain over lake superior on thursday, a 
weak 29.9 to 30.0 inch low could move over the northwestern half of 
the lake by thursday night into friday morning. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning. troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. 




lsz162-220800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue jul 21 2026 /901 pm cdt tue jul 21 2026/

.rest of tonight...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.thursday night...southwest winds 10 to 20 knots. a slight chance
of thunderstorms through midnight. a slight chance of showers.
waves subsiding to calm to 2 feet. 
.friday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 20 to 30 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$