fzus61 kbuf 170802
glflo 
expires:202607171500;;108920

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt fri jul 17 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 ridge averaging 30.1 inches builds from the upper great lakes 
today. a warm front should sweep northeastward across lake ontario 
tonight through saturday morning as the ridge exits toward new 
england and a 29.7 inch low moves eastward across the northwestern 
great lakes. later on saturday, a cold front should move eastward 
across lake ontario as the low moves farther eastward toward 
southern quebec. behind the low and cold front, a 29.9 inch ridge 
should slide southeastward across the great lakes through monday. a 
warm front should sweep northeastward across lake ontario monday 
night and a cold front should sweep eastward across the lake on 
tuesday as a 29.5 inch low moves eastward across northern ontario 
and northern quebec.


loz062-171500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt fri jul 17 2026

.today...east winds 10 knots or less. smoke. waves 2 feet or
less. 
.tonight...southeast winds 5 to 15 knots becoming south. smoke
through the early overnight. a chance of showers and
thunderstorms late. waves 1 foot or less. 
.saturday...southwest winds 15 to 20 knots. showers with a chance
of thunderstorms. waves 1 to 2 feet building to 3 to 5 feet. 
.saturday night...west winds 15 to 20 knots becoming north.
showers with a chance of thunderstorms in the evening. waves 3 to
5 feet. 
.sunday...north winds 5 to 15 knots becoming west. waves 1 to
3 feet subsiding to 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. showers likely monday night. waves
2 feet or less. 
.tuesday...southwest winds 15 to 25 knots becoming west. showers
with a chance of thunderstorms. waves 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 170802
glflo 
expires:202607171500;;108921

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt fri jul 17 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 ridge averaging 30.1 inches builds from the upper great lakes 
today. a warm front should sweep northeastward across lake ontario 
tonight through saturday morning as the ridge exits toward new 
england and a 29.7 inch low moves eastward across the northwestern 
great lakes. later on saturday, a cold front should move eastward 
across lake ontario as the low moves farther eastward toward 
southern quebec. behind the low and cold front, a 29.9 inch ridge 
should slide southeastward across the great lakes through monday. a 
warm front should sweep northeastward across lake ontario monday 
night and a cold front should sweep eastward across the lake on 
tuesday as a 29.5 inch low moves eastward across northern ontario 
and northern quebec.


loz063>065-171500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt fri jul 17 2026

.today...northeast winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.tonight...southeast winds 5 to 15 knots becoming south 15 to
20 knots. patchy smoke in the evening. a chance of showers late.
waves 2 feet or less. 
.saturday...south winds 15 to 20 knots becoming southwest.
showers likely in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 1 to 3 feet building to
3 to 5 feet. 
.saturday night...west winds 15 to 20 knots becoming north.
showers with a chance of thunderstorms in the evening, then a
chance of showers overnight. waves 3 to 6 feet. 
.sunday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming south and
increasing to 15 to 25 knots. a chance of showers monday night.
waves 1 foot or less building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming west. showers with
a chance of thunderstorms. waves 3 to 5 feet subsiding to 2 to
4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 170740
glfle 
expires:202607171415;;108249

open lake forecast for lake erie
national weather service cleveland oh
340 am edt fri jul 17 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 warm front will lift northeast across lake erie tonight into
saturday, followed by a cold front from the northwest saturday 
night. high pressure 30.00 inches will briefly build sunday into 
monday, followed by another cold front on tuesday.


lez162-163-171415-
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-
340 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...southeast winds 10 knots or less. smoke. waves 1 foot or
less. 
.tonight...southeast winds 5 to 15 knots becoming southwest.
smoke in the evening, then patchy smoke after midnight. a slight
chance of showers and thunderstorms. waves 2 feet or less. 
.saturday...southwest winds 15 to 20 knots becoming west. showers
with a chance of thunderstorms in the afternoon. waves 1 to
3 feet. 
.saturday night...west winds 15 to 20 knots becoming north 10 to
15 knots. showers likely with a chance of thunderstorms in the
evening. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots becoming south. waves 2 feet
or less. 
.monday...south winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of showers and thunderstorms monday night.
waves 1 foot or less building to 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest. a
chance of showers and thunderstorms during the day. waves 2 to
4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 170740
glfle 
expires:202607171415;;108250

open lake forecast for lake erie
national weather service cleveland oh
340 am edt fri jul 17 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 warm front will lift northeast across lake erie tonight into
saturday, followed by a cold front from the northwest saturday 
night. high pressure 30.00 inches will briefly build sunday into 
monday, followed by another cold front on tuesday.


lez164>166-171415-
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-
340 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...southeast winds less than 10 knots becoming east. smoke.
waves 1 foot or less. 
.tonight...east winds 5 to 15 knots becoming southwest 15 to
20 knots. smoke in the evening, then patchy smoke after midnight.
a chance of showers with a slight chance of thunderstorms late in
the evening. a chance of showers and thunderstorms after
midnight. waves 1 to 3 feet. 
.saturday...southwest winds 15 to 20 knots becoming west. a
chance of showers and thunderstorms in the morning, then showers
with a chance of thunderstorms in the afternoon. waves 3 to
6 feet. 
.saturday night...west winds 15 to 20 knots becoming north 10 to
15 knots. showers likely with a chance of thunderstorms in the
evening. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.sunday...north winds 5 to 15 knots becoming southeast less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...south winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. showers likely with a chance of
thunderstorms monday night. waves 1 foot or less building to 3 to
6 feet. 
.tuesday...southwest winds 15 to 25 knots becoming northwest.
showers likely with a chance of thunderstorms during the day,
then a chance of showers tuesday night. waves 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 170740
glfle 
expires:202607171415;;108251

open lake forecast for lake erie
national weather service cleveland oh
340 am edt fri jul 17 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 warm front will lift northeast across lake erie tonight into
saturday, followed by a cold front from the northwest saturday 
night. high pressure 30.00 inches will briefly build sunday into 
monday, followed by another cold front on tuesday.


lez061-167>169-171415-
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-
340 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...light and variable winds. smoke. waves 1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. smoke. a chance of showers with a slight chance of
thunderstorms after midnight. a chance of showers and
thunderstorms late. waves 1 to 3 feet. 
.saturday...southwest winds 15 to 25 knots. smoke in the morning.
a chance of showers and thunderstorms in the morning, then
showers with a chance of thunderstorms in the afternoon. waves
3 to 6 feet. 
.saturday night...west winds 15 to 20 knots becoming north 10 to
15 knots. showers with a chance of thunderstorms in the evening.
waves 3 to 6 feet subsiding to 2 to 4 feet. 
.sunday...north winds 5 to 15 knots becoming south less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...south winds 5 to 15 knots increasing to 15 to 25 knots.
showers likely monday night. waves 2 feet or less building to
3 to 6 feet. 
.tuesday...southwest winds 15 to 25 knots becoming northwest.
showers likely with a chance of thunderstorms during the day,
then a chance of showers tuesday night. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 170759
glfsc 
expires:202607171600;;108744

lake st clair forecast
national weather service detroit/pontiac mi
359 am edt fri jul 17 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...canadian wildfire smoke persists today amidst high 
pressure influence. the next weak low pressure systems arrive 
today bringing a round of showers and thunderstorms late in the 
day and overnight. this will be followed by a secondary low on 
saturday tracking across the straits into northern lake huron with
additional unsettled weather.


lcz460-171600-
lake st clair-
359 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...light and variable winds becoming southeast 10 to 15 knots.
cloudy in the morning becoming partly sunny. smoke. waves 2 feet or
less.
.tonight...south winds 10 to 15 knots veering to the southwest early
in the morning. partly cloudy. smoke early in the evening.. then
areas of smoke late in the evening. patchy smoke after midnight.
waves 2 feet or less.
.saturday...west winds 15 to 20 knots. a chance of thunderstorms
early in the morning. a chance of light showers until late
afternoon...then showers and a chance of thunderstorms early in the
afternoon. waves 1 to 3 feet.
.saturday night...north winds 15 to 20 knots diminishing to 10 to 15
knots after midnight. mostly clear. a chance of showers and
thunderstorms early in the evening. waves 1 to 3 feet.
.sunday...north winds 10 to 15 knots becoming northeast 5 to 10
knots in the afternoon and evening. clear. waves 2 feet or less.
.monday...south winds 15 to 20 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.tuesday...northwest winds 20 to 25 knots. showers and a chance of
thunderstorms. waves 1 to 3 feet.

$$

fzus63 kdtx 170757
glflh 
expires:202607171600;;108689

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt fri jul 17 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...canadian wildfire smoke persists today amidst high 
pressure influence. the next weak low pressure systems arrive 
friday bringing a round of showers and thunderstorms late in the 
day and overnight. this will be followed by a secondary low on 
saturday tracking across the straits into northern lake huron with
additional unsettled weather.


lhz462>464-171600-
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-
357 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...light and variable winds becoming southeast 5 to
10 knots late in the afternoon. smoke. waves 2 feet or less. 
.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. smoke in the
evening...then areas of smoke after midnight. waves 2 feet or
less building to 2 to 4 feet after midnight. 
.saturday...southwest winds 15 to 20 knots veering to the west
with gusts to around 30 knots early in the afternoon. a chance of
showers and thunderstorms. waves 2 to 4 feet. 
.saturday night...north winds 20 to 25 knots with gusts to
35 knot gales decreasing to 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.sunday...north winds 10 to 15 knots decreasing to 5 to 10 knots
late in the morning...then becoming light and variable late in
the afternoon becoming south 5 to 10 knots late in the evening.
waves 3 to 5 feet subsiding to 2 feet or less late in the
afternoon. 
.monday...south winds 10 to 15 knots increasing to 15 to 20 knots
with gusts to around 30 knots . showers early in the evening.
rain showers and a chance of thunderstorms by midnight. waves
1 to 3 feet building to 3 to 5 feet . 
.tuesday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
west 15 to 20 knots with gusts to 35 knot gales early in the
evening becoming northwest 20 to 25 knots with gusts to 35 knot
gales by midnight. showers early in the morning. a chance of
thunderstorms. a chance of showers. waves 3 to 5 feet building to
5 to 7 feet by midnight. waves occasionally around 10 feet. 


$$

fzus63 kdtx 170757
glflh 
expires:202607171600;;108688

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt fri jul 17 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...canadian wildfire smoke persists today amidst high 
pressure influence. the next weak low pressure systems arrive 
friday bringing a round of showers and thunderstorms late in the 
day and overnight. this will be followed by a secondary low on 
saturday tracking across the straits into northern lake huron with
additional unsettled weather.


lhz362-363-171600-
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-
357 am edt fri jul 17 2026

...dense smoke advisory in effect until 4 pm edt this afternoon...

.today...light and variable winds becoming southeast 5 to
10 knots late in the afternoon. smoke. waves 2 feet or less. 
.tonight...southeast winds 10 to 15 knots becoming south 15 to
20 knots early in the morning. a chance of showers in the
evening...then a chance of showers and thunderstorms after
midnight. areas of smoke in the evening. smoke after midnight.
waves 1 to 3 feet building to 2 to 4 feet after midnight. 
.saturday...southwest winds 15 to 20 knots with gusts to around
30 knots becoming northwest 20 to 25 knots with gusts to 35 knot
gales early in the afternoon. a chance of showers and
thunderstorms in the morning...then a chance of showers in the
afternoon. waves 4 to 6 feet building to 5 to 7 feet early in the
afternoon. waves occasionally around 10 feet. 
.saturday night...northwest winds 20 to 25 knots with gusts to
around 30 knots becoming northwest 20 to 25 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.sunday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming east 5 to 10 knots late in the
afternoon veering to the south. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.monday...south winds 10 to 15 knots increasing to 20 to 25 knots
with gusts to around 30 knots. showers and a chance of
thunderstorms . waves 1 to 3 feet building to 4 to 6 feet. waves
occasionally around 8 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest
20 to 25 knots early in the evening...then increasing to 30 knots
by midnight. gusts to 35 knot gales. showers likely and a chance
of thunderstorms early in the morning...then a chance of showers
until early evening. waves 6 to 9 feet. waves occasionally around
12 feet. 


$$

fzus63 kdtx 170757
glflh 
expires:202607171600;;108687

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt fri jul 17 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...canadian wildfire smoke persists today amidst high 
pressure influence. the next weak low pressure systems arrive 
friday bringing a round of showers and thunderstorms late in the 
day and overnight. this will be followed by a secondary low on 
saturday tracking across the straits into northern lake huron with
additional unsettled weather.


lhz361-171600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 am edt fri jul 17 2026

...dense smoke advisory in effect until 9 am edt this morning...

.today...light and variable winds becoming southeast 5 to
10 knots in the afternoon. areas of smoke in the morning. patchy
smoke in the afternoon. a chance of showers in the afternoon.
waves 2 feet or less. 
.tonight...east winds 10 to 15 knots veering to the southeast
after midnight...then becoming south 15 to 20 knots early in the
morning. a chance of showers and thunderstorms in the evening...
then showers likely and a chance of thunderstorms after midnight.
areas of smoke. waves 1 to 3 feet building to 2 to 4 feet early
in the morning. 
.saturday...southwest winds 15 to 20 knots veering to the
northwest in the late morning and afternoon. gusts to 30 knots.
showers in the morning. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday night...northwest winds 15 to 20 knots. waves 4 to
6 feet subsiding to 2 to 4 feet after midnight. waves
occasionally around 8 feet. 
.sunday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming southwest 5 to 10 knots late in the
afternoon. waves 2 feet or less. 
.monday...south winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots by midnight. a chance of
showers early in the morning. rain showers and a chance of
thunderstorms . waves 2 to 4 feet building to 4 to 6 feet. waves
occasionally around 8 feet. 
.tuesday...southwest winds 20 to 25 knots with gusts to around
30 knots becoming northwest to 30 knots with gusts to 40 knot
gales. a chance of thunderstorms early in the morning. waves 6 to
9 feet. waves occasionally around 12 feet. 


$$

fzus63 kmkx 170758
glflm 
expires:202607171515;;108691

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
258 am cdt fri jul 17 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...

wildfire smoke from northern mn and northwestern ontario continues 
across all open waters of lake michigan and will reduce visibility
to 1 nm or less at times. thus a marine dense smoke advisory 
continues today through this evening for all open waters.

lighter winds continue as high pressure around 30.1 inches in mid
michigan gradually exits east toward the new england states ahead
of an incoming low pressure around 29.7 inches tracking in from 
the northern plains. this low pressure will shift winds across 
lake michigan to the southwest today and continue to push across 
ontario tonight through saturday dragging a cold front across the
lake through saturday morning. northerly winds will develop 
behind this frontal passage through the day saturday along with 
high pressure around 30.0 inches. the high will then work its way 
across the upper great through the day sunday and departing to the
east overnight sunday while another deepening low tracks across 
ontario for the start of next week. expect more southerly wind for
monday before another, stronger cold front pushes through the 
region by tuesday.

additionally will see periodic shower and thunderstorm chances 
across the lake heading into the weekend through the start of next
week.


lmz261-362-364-366-563-565-567-868-171515-
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-
258 am cdt fri jul 17 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect until 7 pm cdt this evening...

.today...southeast winds 10 to 15 kt becoming south 10 to 20 kt.
smoke. slight chance of showers and thunderstorms this morning,
then slight chance of showers this afternoon. waves 1 to 2 ft. 
.tonight...south winds 10 to 20 kt increasing to 15 to 25 kt late
in the evening, then becoming southwest to 30 kt overnight.
smoke. chance of showers and thunderstorms. waves 1 to 3 ft
building to 3 to 5 ft. 
.saturday...west winds 15 to 25 kt becoming north to 30 kt. waves
3 to 5 ft. 
.saturday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.sunday...northeast winds 5 to 10 kt veering to southwest 10 to
20 kt in the afternoon. waves 1 to 3 ft. 
.sunday night...south winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.monday...southwest gales to 35 kt increasing to gales to 40 kt.
showers likely. waves 4 to 6 ft occasionally to 8 ft building to
6 to 9 ft occasionally to 12 ft. 
.tuesday...northwest gales to 35 kt increasing to gales to 40 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 170758
glflm 
expires:202607171515;;108692

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
258 am cdt fri jul 17 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...

wildfire smoke from northern mn and northwestern ontario continues 
across all open waters of lake michigan and will reduce visibility
to 1 nm or less at times. thus a marine dense smoke advisory 
continues today through this evening for all open waters.

lighter winds continue as high pressure around 30.1 inches in mid
michigan gradually exits east toward the new england states ahead
of an incoming low pressure around 29.7 inches tracking in from 
the northern plains. this low pressure will shift winds across 
lake michigan to the southwest today and continue to push across 
ontario tonight through saturday dragging a cold front across the
lake through saturday morning. northerly winds will develop 
behind this frontal passage through the day saturday along with 
high pressure around 30.0 inches. the high will then work its way 
across the upper great through the day sunday and departing to the
east overnight sunday while another deepening low tracks across 
ontario for the start of next week. expect more southerly wind for
monday before another, stronger cold front pushes through the 
region by tuesday.

additionally will see periodic shower and thunderstorm chances 
across the lake heading into the weekend through the start of next
week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-171515-
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-
258 am cdt fri jul 17 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect until 7 pm cdt this evening...

.today...southeast winds 10 to 15 kt becoming south. smoke.
slight chance of showers this afternoon. waves 1 to 2 ft. 
.tonight...south winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 2 to 4 ft. 
.saturday...west winds 15 to 25 kt veering to north to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...north winds to 30 kt becoming northeast 10 to
20 kt overnight. waves 4 to 7 ft occasionally to 9 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday night...east winds 10 to 15 kt veering to south 10 to
20 kt. waves 1 to 3 ft. 
.monday...south winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft building
to 5 to 8 ft occasionally to 10 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 35 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108840

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz264-172000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.early this morning...southeast winds 5 to 15 knots. areas of
smoke. a slight chance of showers. waves calm to 2 feet. 
.today...southeast winds 5 to 15 knots. smoke. a chance of
showers and thunderstorms. waves building to 1 to 3 feet. 
.tonight...south winds 5 to 15 knots veering west after midnight,
then becoming northwest 10 to 20 knots late. areas of smoke. a
chance of thunderstorms through midnight. a chance of showers.
waves 1 to 3 feet. 
.saturday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. smoke. waves
building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming southwest
less than 10 knots after midnight. areas of smoke through
midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves
building to 2 to 4 feet. 
.monday...southwest winds 20 to 30 knots veering west. showers
likely. a chance of thunderstorms. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108841

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz265-172000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.early this morning...southeast winds 10 to 20 knots. smoke.
waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots. smoke. a chance of
showers through early afternoon. a chance of thunderstorms.
showers likely by mid afternoon. waves building to 1 to 3 feet. 
.tonight...south winds 10 to 20 knots becoming west 15 to
25 knots after midnight. areas of smoke. a chance of
thunderstorms through midnight. a chance of showers. waves
building to 2 to 4 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. smoke. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots becoming
southwest 5 to 15 knots after midnight. areas of smoke through
midnight. waves subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday 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. 
.monday...southwest gales to 35 knots becoming west gales to
40 knots. showers likely. a chance of thunderstorms. a chance of
showers. waves building to 6 to 9 feet occasionally to 11 feet. 
.tuesday...northwest gales to 45 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108838

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz162-172000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri jul 17 2026 /300 am cdt fri jul 17 2026/

...dense smoke advisory in effect until 8 pm edt /7 pm cdt/ this
evening...

.early this morning...northeast winds 5 to 15 knots. smoke. a
slight chance of showers and thunderstorms. waves calm to 2 feet.
.today...northeast winds 5 to 15 knots veering east in the
afternoon. smoke. a chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...west winds 10 to 20 knots veering northwest late. a
slight chance of showers and thunderstorms through midnight.
areas of smoke. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest in
the afternoon. areas of smoke. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming south less
than 10 knots after midnight. areas of smoke through midnight.
waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. a chance of thunderstorms. showers
likely after midnight. waves calm to 2 feet. 
.monday...southwest winds 20 to 30 knots veering west. a chance
of showers and thunderstorms. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108843

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz267-172000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.early this morning...southeast winds 5 to 15 knots. smoke. waves
calm to 2 feet. 
.today...southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. smoke. a chance of showers. a slight
chance of thunderstorms by mid afternoon. waves calm to 2 feet. 
.tonight...south winds 15 to 25 knots veering west late. smoke.
showers likely through midnight. a chance of thunderstorms. a
chance of showers after midnight. waves building to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots. areas of smoke. waves
building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. areas of smoke through midnight.
waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. a chance of showers after midnight.
waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...south winds 20 to 30 knots veering west. showers and a
chance of thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...northwest gales to 35 knots. waves building to 7 to
11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108842

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz266-172000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.early this morning...southeast winds 5 to 15 knots. smoke. waves
calm to 2 feet. 
.today...southeast winds 10 to 20 knots. smoke. a chance of
showers and a slight chance of thunderstorms. waves building to
1 to 3 feet. 
.tonight...south winds 10 to 20 knots veering west after
midnight, then becoming northwest 15 to 25 knots late. smoke. a
chance of showers and thunderstorms. waves building to 2 to
4 feet. 
.saturday...northwest winds 15 to 25 knots. patchy smoke through
early afternoon, then smoke by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday night...northwest winds 5 to 15 knots backing west
after midnight. smoke through midnight. waves subsiding to calm
to 2 feet. 
.sunday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of showers after midnight.
waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...south winds 20 to 30 knots becoming west gales to
40 knots. showers likely. a chance of thunderstorms. a chance of
showers. waves building to 6 to 9 feet occasionally to 11 feet. 
.tuesday...northwest gales to 45 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202607172000;;108839

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 17 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz263-172000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.early this morning...southeast winds 5 to 15 knots. smoke. a
slight chance of showers and thunderstorms. waves calm to 2 feet.
.today...south winds 5 to 15 knots backing east late. smoke. a
chance of showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. areas
of smoke. a chance of thunderstorms through midnight. a chance of
showers. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest late.
smoke. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday night...west winds 5 to 15 knots backing south after
midnight. areas of smoke through midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. showers likely and a chance of
thunderstorms after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday...southwest winds 20 to 30 knots veering west. a chance
of showers and thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots diminishing to 10 to
20 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet. 

$$