fzus61 kbuf 200803
glflo 
expires:202607201500;;278422

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 20 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 30.0 inch area of high pressure will build across the great lakes 
today, followed by a warm front crossing the lake tonight and 
another cold front tuesday night, with these fronts attached to a 
29.4 inch area of low pressure near james bay. a secondary cold 
front will cross the lake wednesday, with a 30.1 inch high building 
across the lower great lakes region wednesday night through friday.


loz062-201500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon jul 20 2026

.today...light and variable winds becoming east 5 to 10 knots.
waves 1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest. showers
with a chance of thunderstorms. waves 1 to 3 feet building to
3 to 5 feet, then subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms in the evening, then a
chance of showers overnight. waves 2 to 4 feet building to 3 to
6 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
2 to 4 feet. waves occasionally around 9 feet. 
.thursday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.friday...southwest winds 10 knots or less. waves 1 foot or less.

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 200803
glflo 
expires:202607201500;;278423

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 20 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 30.0 inch area of high pressure will build across the great lakes 
today, followed by a warm front crossing the lake tonight and 
another cold front tuesday night, with these fronts attached to a 
29.4 inch area of low pressure near james bay. a secondary cold 
front will cross the lake wednesday, with a 30.1 inch high building 
across the lower great lakes region wednesday night through friday.


loz063>065-201500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon jul 20 2026

.today...west winds 10 knots or less becoming east. waves 1 foot
or less. 
.tonight...east winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 foot or less building to 2 to 4 feet. 
.tuesday...south winds 15 to 20 knots. showers with a chance of
thunderstorms. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 10 to 15 knots becoming west
15 to 20 knots. showers with a chance of thunderstorms. waves
1 to 3 feet building to 3 to 6 feet. 
.wednesday...west winds 15 to 25 knots. showers likely during the
day. waves 5 to 8 feet subsiding to 3 to 5 feet. waves
occasionally around 10 feet. 
.thursday...west winds 5 to 15 knots becoming southwest. waves
1 to 3 feet subsiding to 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 200741
glfle 
expires:202607201415;;277950

open lake forecast for lake erie
national weather service cleveland oh
341 am edt mon jul 20 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...
high pressure 30.00 inches will drift east away from the region
by this evening, allowing a warm front to lift across the lake
late tonight into early tuesday. a cold front will move southeast
across the area tuesday afternoon into tuesday night with a trough
averaging 29.80 inches lingering over the eastern great lakes
through wednesday. high pressure 30.10 inches will build east
thursday and friday.


lez162>164-201415-
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-
341 am edt mon jul 20 2026

.today...south winds 10 knots or less becoming southeast. patchy
smoke. waves 1 foot or less. 
.tonight...south winds 5 to 15 knots becoming southwest 15 to
20 knots. patchy smoke early. a chance of showers and
thunderstorms after midnight. showers likely with a chance of
thunderstorms late. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west. a chance
of showers and thunderstorms in the morning, then showers likely
with a chance of thunderstorms in the afternoon. waves 2 to
4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. 
.tuesday night...west winds 15 to 20 knots becoming northwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 2 to 4 feet. 
.wednesday...northwest winds 15 to 20 knots becoming north and
diminishing to 5 to 10 knots. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.thursday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.friday...southwest winds less than 10 knots becoming south.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 200741
glfle 
expires:202607201415;;277951

open lake forecast for lake erie
national weather service cleveland oh
341 am edt mon jul 20 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...
high pressure 30.00 inches will drift east away from the region
by this evening, allowing a warm front to lift across the lake
late tonight into early tuesday. a cold front will move southeast
across the area tuesday afternoon into tuesday night with a trough
averaging 29.80 inches lingering over the eastern great lakes
through wednesday. high pressure 30.10 inches will build east
thursday and friday.


lez165>167-201415-
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-
341 am edt mon jul 20 2026

.today...southwest winds 10 knots or less becoming northwest.
patchy smoke. waves 1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. patchy smoke early. a chance of showers and
thunderstorms late. waves 1 foot or less building to 2 to 4 feet.
.tuesday...southwest winds 15 to 25 knots. a chance of showers
and thunderstorms in the morning, then showers likely with a
chance of thunderstorms in the afternoon. waves 3 to 6 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 
.tuesday night...west winds 15 to 20 knots becoming northwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 3 to 6 feet. 
.wednesday...northwest winds 15 to 20 knots becoming north and
diminishing to 5 to 10 knots. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.thursday...north winds 10 knots or less becoming south. waves
2 feet or less. 
.friday...southeast winds less than 10 knots. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 200741
glfle 
expires:202607201415;;277952

open lake forecast for lake erie
national weather service cleveland oh
341 am edt mon jul 20 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...
high pressure 30.00 inches will drift east away from the region
by this evening, allowing a warm front to lift across the lake
late tonight into early tuesday. a cold front will move southeast
across the area tuesday afternoon into tuesday night with a trough
averaging 29.80 inches lingering over the eastern great lakes
through wednesday. high pressure 30.10 inches will build east
thursday and friday.


lez061-168-169-201415-
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-
341 am edt mon jul 20 2026

.today...southwest winds 10 knots or less becoming west. patchy
smoke. waves 1 foot or less. 
.tonight...south winds 10 knots or less increasing to 15 to
20 knots. patchy smoke early. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 25 knots. showers likely with a
chance of thunderstorms. waves 3 to 6 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.tuesday night...west winds 15 to 20 knots becoming northwest.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 3 to 6 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 5 to
10 knots. a chance of showers during the day. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday...northwest winds 10 knots or less becoming south.
waves 2 feet or less. 
.friday...south winds less than 10 knots becoming southeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 200759
glfsc 
expires:202607201600;;278243

lake st clair forecast
national weather service detroit/pontiac mi
359 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lcz460-201600-
lake st clair-
359 am edt mon jul 20 2026

...small craft advisory in effect from late tonight through
tuesday evening...

.today...light and variable winds becoming south 10 to 15 knots.
partly sunny. patchy smoke. waves 2 feet or less.
.tonight...south winds 15 to 20 knots becoming southwest 20 to 25
knots early in the morning. partly cloudy in the evening.. then
mostly cloudy with a chance of thunderstorms after midnight. mostly
cloudy with a chance of showers and thunderstorms early in the
morning. patchy smoke. waves 1 to 3 feet building to 2 to 4 feet
early in the morning.
.tuesday...southwest winds 20 to 25 knots with gusts to 30 knots
becoming west 15 to 20 knots in the late morning and afternoon.
mostly sunny. a chance of light showers until late afternoon.. then
light showers likely and a chance of thunderstorms early in the
afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and afternoon.
.tuesday night...northwest winds 15 to 20 knots increasing to 20 to
25 knots in the late evening and overnight. partly cloudy. a chance
of showers and thunderstorms early in the evening. waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight.
.wednesday...northwest winds 20 to 25 knots becoming north 10 to 15
knots. partly sunny becoming mostly sunny in the afternoon becoming
clear. waves 1 to 3 feet.
.thursday...south winds 5 to 10 knots. clear. waves 2 feet or less.
.friday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 200758
glflh 
expires:202607201600;;278232

open lake forecast for lake huron
national weather service detroit/pontiac mi
358 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz462>464-201600-
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-
358 am edt mon jul 20 2026

.today...light and variable winds becoming south 10 to 15 knots.
patchy smoke. waves 1 to 3 feet. 
.tonight...south winds 10 to 15 knots increasing to 20 to
25 knots with gusts to around 30 knots. patchy smoke. a chance of
showers and thunderstorms after midnight. waves 3 to 5 feet
building to 5 to 7 feet early in the morning. waves occasionally
around 10 feet. 
.tuesday...southwest winds 15 to 20 knots with gusts to around
30 knots becoming west 10 to 15 knots in the late morning and
afternoon. a chance of showers in the morning...then a chance of
showers and thunderstorms in the afternoon. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.tuesday night...northwest winds 15 to 20 knots increasing to
20 to 25 knots in the late evening and overnight. gusts to
30 knots. a chance of showers and thunderstorms in the evening.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots becoming north 10 to 15 knots late in the evening. waves
8 to 12 feet. waves occasionally around 15 feet. 
.thursday...west winds 5 to 10 knots early in the morning
becoming light and variable...then becoming south 5 to 10 knots .
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots backing to the south .
waves 2 feet or less. 


$$

fzus63 kdtx 200758
glflh 
expires:202607201600;;278231

open lake forecast for lake huron
national weather service detroit/pontiac mi
358 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz362-363-201600-
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-
358 am edt mon jul 20 2026

.today...southwest winds 5 to 10 knots becoming south 15 to
20 knots with gusts to around 30 knots. patchy smoke in the
afternoon. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.tonight...south winds 15 to 20 knots increasing to 20 to
25 knots after midnight. gusts to 30 knots. a chance of showers
and thunderstorms. patchy smoke. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.tuesday...southwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots in the late morning and
early afternoon...then becoming west 15 to 20 knots with gusts to
around 30 knots early in the afternoon. a chance of showers.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.tuesday night...northwest winds to 30 knots. waves 10 to
14 feet. waves occasionally around 18 feet. 
.wednesday...northwest winds to 30 knots decreasing to 10 to
15 knots. waves 8 to 12 feet. waves occasionally around 15 feet. 
.thursday...west winds 5 to 10 knots backing to the south . waves
3 to 5 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots backing to the south .
waves 2 feet or less. 


$$

fzus63 kdtx 200758
glflh 
expires:202607201600;;278230

open lake forecast for lake huron
national weather service detroit/pontiac mi
358 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz361-201600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
358 am edt mon jul 20 2026

.today...south winds 10 to 15 knots. patchy smoke. waves 1 to
3 feet building to 3 to 5 feet late in the afternoon. 
.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots in the late evening and
overnight. patchy smoke in the evening. showers likely and a
chance of thunderstorms in the evening...then showers and a
chance of thunderstorms after midnight. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.tuesday...west winds 15 to 20 knots with gusts to around
30 knots increasing to 20 to 25 knots with gusts to around
30 knots early in the afternoon. waves 4 to 6 feet building to
6 to 9 feet early in the afternoon. waves occasionally around
12 feet. 
.tuesday night...northwest winds to 30 knots decreasing to 20 to
25 knots in the late evening and overnight. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.wednesday...northwest winds to 30 knots decreasing to 10 to
15 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.thursday...west winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then becoming southwest
5 to 10 knots . waves 1 to 3 feet. 
.friday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots. waves 2 feet or less. 


$$

fzus63 kmkx 200756
glflm 
expires:202607201515;;278183

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am cdt mon jul 20 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 currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan through early this morning.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz261-362-364-366-563-565-567-868-201515-
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-
256 am cdt mon jul 20 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect until 7 am cdt this morning...

.today...southwest winds 15 to 25 kt becoming south gales to
35 kt. patchy smoke. slight chance of showers and thunderstorms
this afternoon. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.tonight...south gales to 40 kt becoming southwest gales to 35 kt
late in the evening, then diminishing to 30 kt after midnight
becoming west late. patchy smoke. showers likely with a chance of
thunderstorms in the evening, then chance of showers overnight.
waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday...west winds to 30 kt becoming north gales to 35 kt.
patchy smoke in the morning. waves 4 to 7 ft occasionally to 9 ft
building to 5 to 8 ft occasionally to 10 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.wednesday night...west winds 15 to 25 kt becoming southwest 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 200756
glflm 
expires:202607201515;;278184

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am cdt mon jul 20 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 currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan through early this morning.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
256 am cdt mon jul 20 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect until 7 am cdt this morning...

.today...south winds 10 to 20 kt increasing to 30 kt. patchy
smoke. waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft. 
.tonight...south winds to 30 kt becoming west. patchy smoke in
the evening. chance of showers and thunderstorms. waves 5 to 8 ft
occasionally to 10 ft. 
.tuesday...west winds to 30 kt becoming north. patchy smoke in
the morning. waves 4 to 7 ft occasionally to 9 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 12 ft
occasionally to 16 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming northwest
5 to 10 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to
2 to 4 ft. 
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278345

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon jul 20 2026

...dense smoke advisory in effect until 8 am edt this morning...

.early this morning...south winds 15 to 25 knots. patchy smoke. a
slight chance of showers and thunderstorms. waves 1 to 3 feet
building to 2 to 4 feet. 
.today...southwest winds 20 to 30 knots. patchy smoke through
early afternoon. showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of showers
and thunderstorms by mid afternoon. some thunderstorms may be
severe by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots. patchy smoke through
midnight. a slight chance of thunderstorms through midnight. a
slight chance of showers. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 20 to 30 knots becoming north to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon, then backing northwest late. a slight chance of
showers through early afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278346

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon jul 20 2026

...dense smoke advisory in effect until 8 am edt this morning...
...gale watch in effect from tuesday morning through late tuesday
night...

.early this morning...south winds 20 to 30 knots. a slight chance
of showers and thunderstorms. waves 1 to 3 feet. 
.today...south winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon. patchy smoke. a slight chance of
thunderstorms through early afternoon. a chance of showers. a
chance of thunderstorms by mid afternoon. some thunderstorms may
be severe by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tonight...west winds 20 to 30 knots increasing to gales to
35 knots late. patchy smoke. a chance of thunderstorms through
midnight. a slight chance of showers. some thunderstorms may be
severe. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.tuesday...northwest gales to 45 knots. a slight chance of
showers. waves building to 7 to 10 feet occasionally to 13 feet. 
.tuesday night...northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots backing southwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots veering southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278343

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon jul 20 2026 /301 am cdt mon jul 20 2026/

.early this morning...southwest winds 20 to 30 knots. patchy
smoke. a chance of showers and thunderstorms. waves 1 to 3 feet
building to 2 to 4 feet. 
.today...southwest winds 20 to 30 knots veering west late. a
slight chance of showers and thunderstorms. patchy smoke by mid
afternoon. some thunderstorms may be severe by mid afternoon.
waves building to 3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. patchy smoke through midnight. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 20 to
30 knots in the afternoon. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278348

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon jul 20 2026

...dense smoke advisory in effect until 8 am edt this morning...
...gale watch in effect from tuesday morning through late tuesday
night...

.early this morning...southwest winds 15 to 25 knots. patchy
smoke. showers likely and a chance of thunderstorms. waves 2 to
4 feet. 
.today...south winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. patchy smoke. a chance of showers and a slight
chance of thunderstorms through early afternoon. showers likely
and a chance of thunderstorms by mid afternoon. some
thunderstorms may be severe by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet. 
.tonight...south winds 15 to 25 knots veering west late. showers
and a chance of thunderstorms through midnight, then a chance of
showers after midnight. patchy smoke after midnight. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest gales to
40 knots in the afternoon. a slight chance of showers through
early afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tuesday night...northwest gales to 35 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278347

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz266-202000-
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-
401 am edt mon jul 20 2026

...dense smoke advisory in effect until 8 am edt this morning...
...gale watch in effect from tuesday morning through late tuesday
night...

.early this morning...south winds 15 to 25 knots. a chance of
thunderstorms and a slight chance of showers. waves 2 to 4 feet. 
.today...south winds 15 to 25 knots. patchy smoke. a slight
chance of thunderstorms through early afternoon. a chance of
showers. a chance of thunderstorms by mid afternoon. some
thunderstorms may be severe by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet. 
.tonight...southwest winds 15 to 25 knots veering west after
midnight, then increasing to 20 to 30 knots late. a chance of
thunderstorms through midnight. a chance of showers. patchy smoke
after midnight. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest gales to 40 knots. a slight chance of
showers. waves building to 8 to 11 feet occasionally to 14 feet. 
.tuesday night...northwest gales to 40 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202607202000;;278344

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon jul 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

a low pressure will track into ontario and deepen to 29.4 inches 
tonight with a 29.5 inch trough over lake superior. the low will 
then push east into quebec and retrograde to northern quebec for 
midweek. meanwhile a 30.1 inch ridge descends southeast over the 
midwest tuesday through wednesday night, moving into the ohio river 
valley on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz263-202000-
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-
401 am edt mon jul 20 2026

...dense smoke advisory in effect until 8 am edt this morning...

.early this morning...southwest winds 15 to 25 knots. patchy
smoke. a chance of showers and thunderstorms. waves 2 to 4 feet
building to 3 to 5 feet occasionally to 7 feet. 
.today...southwest winds 20 to 30 knots. patchy smoke through
early afternoon. showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of showers
and thunderstorms by mid afternoon. some thunderstorms may be
severe by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. patchy smoke through midnight. a slight
chance of thunderstorms through midnight. a slight chance of
showers. some thunderstorms may be severe. waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.tuesday...northwest winds 20 to 30 knots veering north in the
afternoon. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots veering west
after midnight. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.friday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 

$$