fzus61 kbuf 140202
glflo 
expires:202608140900;;148166

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu aug 13 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 high pressure ridge averaging 30.2 inches begins to build from the 
canadian prairies tonight before settling over lake ontario and 
vicinity by this saturday. the ridge begins to exit eastward 
saturday night through sunday morning and allows a warm front to 
sweep northeastward across lake ontario as a low of 29.7 inches 
moves eastward across the northern great lakes. this low should move 
generally east-southeastward from near the northern great lakes to 
near the gulf of maine later sunday through this monday. the low 
track should allow a cold front to sweep eastward across lake 
ontario sunday evening through sunday night. behind the cold front, 
a high pressure ridge averaging 30.0 inches should attempt to build 
from the upper midwest through monday. the high is expected to move 
off the east coast tuesday.


loz063>065-140900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu aug 13 2026

.overnight...northwest winds 10 knots or less becoming
north. waves 2 feet or less. 
.friday...northeast winds 10 knots or less. waves 1 foot or less.
.friday night...northeast winds 10 knots or less. waves 1 foot or
less. 
.saturday...northeast winds 5 to 10 knots. waves 1 foot or less. 
.saturday night...east winds 5 to 10 knots becoming southeast. a
chance of showers overnight. waves 2 feet or less. 
.sunday...southeast winds 10 to 15 knots becoming north. showers
likely with a chance of thunderstorms. waves 2 feet or less. 
.monday...north winds 10 knots or less becoming northwest. a
chance of showers during the day. waves 2 feet or less. 
.tuesday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 140202
glflo 
expires:202608140900;;148165

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu aug 13 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 high pressure ridge averaging 30.2 inches begins to build from the 
canadian prairies tonight before settling over lake ontario and 
vicinity by this saturday. the ridge begins to exit eastward 
saturday night through sunday morning and allows a warm front to 
sweep northeastward across lake ontario as a low of 29.7 inches 
moves eastward across the northern great lakes. this low should move 
generally east-southeastward from near the northern great lakes to 
near the gulf of maine later sunday through this monday. the low 
track should allow a cold front to sweep eastward across lake 
ontario sunday evening through sunday night. behind the cold front, 
a high pressure ridge averaging 30.0 inches should attempt to build 
from the upper midwest through monday. the high is expected to move 
off the east coast tuesday.


loz062-140900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu aug 13 2026

.overnight...northwest winds 10 knots or less becoming
north. waves 1 foot or less. 
.friday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.friday night...east winds 10 knots or less. waves 1 foot or
less. 
.saturday...east winds 5 to 15 knots. waves 1 to 2 feet. 
.saturday night...east winds 10 to 15 knots becoming southeast. a
chance of showers overnight. waves 1 to 2 feet. 
.sunday...southeast winds around 10 knots becoming northwest.
showers likely with a chance of thunderstorms. waves 1 to 2 feet.
.monday...north winds 10 knots or less becoming northwest. waves
1 foot or less. 
.tuesday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 140124
glfle 
expires:202608140815;;147389

open lake forecast for lake erie
national weather service cleveland oh
924 pm edt thu aug 13 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 nearly stationary front will meander across the ohio valley 
through saturday. high pressure 30.00 inches builds into the upper
great lakes tonight and friday. this high will shift eastward 
towards the northeast u.s. by saturday. low pressure 29.80 inches 
will drift across the central great lakes sunday, moving a warm 
front north in the morning and a cold front east sunday night. 
high pressure 30.10 inches returns for the start of next week.


lez162>164-140815-
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-
924 pm edt thu aug 13 2026

.overnight...southeast winds 10 knots or less. a slight
chance of showers, then a chance of showers late. waves 1 foot or
less. 
.friday...southeast winds 5 to 10 knots becoming east. a chance
of showers in the morning, then a slight chance of showers early
in the afternoon. waves 1 foot or less. 
.friday night...east winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.saturday...east winds 5 to 10 knots. a chance of showers. waves
2 feet or less. 
.saturday night...east winds 10 to 15 knots becoming southwest.
showers likely with a chance of thunderstorms. waves 1 to 2 feet.
.sunday...west winds 10 to 15 knots becoming northwest. a chance
of showers and thunderstorms. waves 1 to 3 feet. 
.monday...north winds 10 knots or less becoming northeast. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 140124
glfle 
expires:202608140815;;147390

open lake forecast for lake erie
national weather service cleveland oh
924 pm edt thu aug 13 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 nearly stationary front will meander across the ohio valley 
through saturday. high pressure 30.00 inches builds into the upper
great lakes tonight and friday. this high will shift eastward 
towards the northeast u.s. by saturday. low pressure 29.80 inches 
will drift across the central great lakes sunday, moving a warm 
front north in the morning and a cold front east sunday night. 
high pressure 30.10 inches returns for the start of next week.


lez165>167-140815-
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-
924 pm edt thu aug 13 2026

.overnight...east winds less than 10 knots becoming
southeast. a slight chance of showers. waves
1 foot or less. 
.friday...southeast winds 5 to 10 knots becoming northeast. a
slight chance of showers in the morning. waves 1 foot or less. 
.friday night...northeast winds 5 to 10 knots becoming east.
waves 1 foot or less. 
.saturday...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...east winds 10 to 15 knots becoming south.
showers likely in the evening, then showers with a chance of
thunderstorms overnight. waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of showers and thunderstorms. waves 2 to
4 feet. 
.monday...north winds 10 knots or less. waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 140124
glfle 
expires:202608140815;;147391

open lake forecast for lake erie
national weather service cleveland oh
924 pm edt thu aug 13 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 nearly stationary front will meander across the ohio valley 
through saturday. high pressure 30.00 inches builds into the upper
great lakes tonight and friday. this high will shift eastward 
towards the northeast u.s. by saturday. low pressure 29.80 inches 
will drift across the central great lakes sunday, moving a warm 
front north in the morning and a cold front east sunday night. 
high pressure 30.10 inches returns for the start of next week.


lez061-168-169-140815-
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-
924 pm edt thu aug 13 2026

.overnight...west winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...east winds 10 knots or less becoming north. waves
1 foot or less. 
.friday night...north winds 5 to 10 knots becoming east. waves
1 foot or less. 
.saturday...east winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.saturday night...east winds 5 to 15 knots becoming south. a
chance of showers in the evening, then showers overnight. waves
2 feet or less. 
.sunday...southwest winds 15 to 20 knots becoming northwest 5 to
15 knots. showers likely with a chance of thunderstorms during
the day, then a chance of showers sunday night. waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday...north winds 10 knots or less. waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 140156
glflh 
expires:202608141000;;147924

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 pm edt thu aug 13 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, 30.00 inches, will dominate the region
through saturday. the next low pressure system will pass through
the region on saturday night bringing the next thunderstorm
chances.


lhz362-363-141000-
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-
956 pm edt thu aug 13 2026

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


$$

fzus63 kdtx 140156
glflh 
expires:202608141000;;147925

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 pm edt thu aug 13 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, 30.00 inches, will dominate the region
through saturday. the next low pressure system will pass through
the region on saturday night bringing the next thunderstorm
chances.


lhz462>464-141000-
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-
956 pm edt thu aug 13 2026

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


$$

fzus63 kdtx 140156
glfsc 
expires:202608141000;;147927

lake st clair forecast
national weather service detroit/pontiac mi
956 pm edt thu aug 13 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, 30.00 inches, will dominate the region
through saturday. the next low pressure system will pass through
the region on saturday night bringing the next thunderstorm
chances.


lcz460-141000-
lake st clair-
956 pm edt thu aug 13 2026

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

$$

fzus63 kdtx 140156
glflh 
expires:202608141000;;147923

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 pm edt thu aug 13 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, 30.00 inches, will dominate the region
through saturday. the next low pressure system will pass through
the region on saturday night bringing the next thunderstorm
chances.


lhz361-141000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
956 pm edt thu aug 13 2026

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


$$

fzus63 kmkx 140149
glflm 
expires:202608140930;;147855

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region
midweek. 


lmz080-671-673-675-777-779-872-874-876-878-140930-
lake michigan from michigan city in to st. joseph mi 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 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-
849 pm cdt thu aug 13 2026

port washington wi to whitehall mi south...

.rest of tonight...northeast winds 10 to 15 kt becoming east.
chance of showers and slight chance of thunderstorms. waves 1 to
2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
slight chance of showers in the morning. waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt veering to southeast.
chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt. showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then chance of showers overnight. waves 3 to 5 ft subsiding to
1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft. 
.sunday night...north winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 140149
glflm 
expires:202608140930;;147853

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region
midweek. 


lmz261-362-364-563-140930-
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 rock island passage to sturgeon bay wi-
849 pm cdt thu aug 13 2026

sturgeon bay wi to point betsie mi north...

.rest of tonight...north winds 5 to 10 kt becoming northeast.
waves 1 ft or less. 
.friday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.friday night...northeast winds 10 to 20 kt becoming east 10 to
15 kt. waves 1 to 2 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers. waves
1 to 3 ft. 
.saturday night...southeast winds 10 to 20 kt veering to
southwest. chance of showers. waves 1 to 3 ft. 
.sunday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers in the morning. waves 1 to 3 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.monday...northwest winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft.  

$$

fzus63 kmkx 140149
glflm 
expires:202608140930;;147854

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region
midweek. 


lmz366-565-567-669-868-870-140930-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
849 pm cdt thu aug 13 2026

sturgeon bay wi to point betsie mi south to port washington wi to
whitehall mi...

.rest of tonight...northeast winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 to 2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...northeast winds 10 to 20 kt veering to southeast.
chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds to 30 kt. chance of showers in the
morning, then showers likely in the afternoon. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
showers likely in the evening, then chance of showers overnight.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. waves 1 to
3 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 2 ft building to 1 to 3 ft.  

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148132

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu aug 13 2026 /901 pm cdt thu aug 13 2026/

.rest of tonight...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. waves building to 2 to 4 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then becoming east 5 to 15 knots
late. a slight chance of showers after midnight. waves subsiding
to calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots backing northwest
after midnight. a chance of showers through midnight. waves calm
to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148133

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz263-140800-
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 aug 13 2026

.rest of tonight...northeast winds less than 10 knots increasing
to 5 to 15 knots late. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon, then becoming east 20 to 30 knots
late. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of showers
by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northwest
after midnight. a slight chance of thunderstorms through
midnight. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.monday...southwest winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148134

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz264-140800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu aug 13 2026

.rest of tonight...northwest winds less than 10 knots veering
north after midnight. waves calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots backing east after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of showers
by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering west
after midnight. a slight chance of thunderstorms through
midnight. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148135

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz265-140800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu aug 13 2026

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

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148136

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz266-140800-
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 aug 13 2026

.rest of tonight...northwest winds 5 to 15 knots veering north
late. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves building to 1 to
3 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.tuesday...west winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 140201
glfls 
expires:202608140800;;148137

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu aug 13 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...

this evening, 30.0 inch ridging is extending over the lake from a 
30.2 inch high over the canadian rockies. this high eventually 
becomes centered over the lake at 30.2 inches friday afternoon. a 
29.9 inch trough then moves over the western end of the lake 
saturday overnight as the 30.2 inch high moves over the lower great 
lakes. this trough consolidates to a 29.8 inch low as it passes over 
lake superior, reaching the ontario/quebec line by sunday afternoon. 
sunday night into monday, a 30.1 inch high over the plains will 
weaken to 30.0 inches as it slides south of lake superior. by 
tuesday, this high will be fully south of the great lakes as a 29.5 
inch low over hudson bay extends a 29.9 inch trough over lake 
superior.




lsz267-140800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu aug 13 2026

.rest of tonight...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.friday...north winds 5 to 15 knots backing northwest late. waves
calm to 2 feet. 
.friday night...north winds 5 to 15 knots veering east late.
waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers through midnight, then
showers likely and a slight chance of thunderstorms after
midnight. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.tuesday...west winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of showers. waves calm to 2 feet. 

$$