fzus61 kbuf 270802
glflo 
expires:202607271500;;682009

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 27 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 29.6 inch low over the western great lakes this 
morning will strengthen to 29.3 inches while moving southeast into 
the lower great lakes tonight and tuesday. a cold front associated 
with this low will swing across the lake late tuesday and tuesday 
night. the low will then weaken to 29.6 inches while drifting east 
into new england by wednesday, before entering the northern atlantic 
thursday and friday. meanwhile a 30.0 inch high will slide across 
the great lakes thursday and friday.


loz062-271500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon jul 27 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 270802
glflo 
expires:202607271500;;682010

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 27 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 29.6 inch low over the western great lakes this 
morning will strengthen to 29.3 inches while moving southeast into 
the lower great lakes tonight and tuesday. a cold front associated 
with this low will swing across the lake late tuesday and tuesday 
night. the low will then weaken to 29.6 inches while drifting east 
into new england by wednesday, before entering the northern atlantic 
thursday and friday. meanwhile a 30.0 inch high will slide across 
the great lakes thursday and friday.


loz063>065-271500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon jul 27 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271318
glfle 
expires:202607272015;;694232

open lake forecast for lake erie
national weather service cleveland oh
918 am edt mon jul 27 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...
low pressure 29.70 inches over the northern great lakes will move
southeast towards the lower great lakes and upper ohio valley
today. the low will deepen to 29.50 inches while dragging a cold 
front southeast across lake erie tonight through tuesday. a trough
averaging 29.80 inches will linger through wednesday before a
ridge averaging 30.00 inches moves over the lower great lakes 
thursday into friday.


lez061-169-272015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
918 am edt mon jul 27 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271318
glfle 
expires:202607272015;;694231

open lake forecast for lake erie
national weather service cleveland oh
918 am edt mon jul 27 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...
low pressure 29.70 inches over the northern great lakes will move
southeast towards the lower great lakes and upper ohio valley
today. the low will deepen to 29.50 inches while dragging a cold 
front southeast across lake erie tonight through tuesday. a trough
averaging 29.80 inches will linger through wednesday before a
ridge averaging 30.00 inches moves over the lower great lakes 
thursday into friday.


lez164>168-272015-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
918 am edt mon jul 27 2026

.rest of today...southwest winds 5 to 10 knots. a slight chance
of showers and thunderstorms late this morning. waves 2 feet or
less. 
.tonight...southwest winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms in the evening,
then showers with a chance of thunderstorms after midnight. waves
1 to 3 feet building to 3 to 5 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest to
30 knots. showers in the morning, then a chance of showers in the
afternoon. waves 3 to 6 feet. 
.tuesday night...northwest winds 20 to 25 knots becoming north.
waves 4 to 7 feet. waves occasionally around 9 feet. 
.wednesday...north winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.thursday...north winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.friday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271318
glfle 
expires:202607272015;;694230

open lake forecast for lake erie
national weather service cleveland oh
918 am edt mon jul 27 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...
low pressure 29.70 inches over the northern great lakes will move
southeast towards the lower great lakes and upper ohio valley
today. the low will deepen to 29.50 inches while dragging a cold 
front southeast across lake erie tonight through tuesday. a trough
averaging 29.80 inches will linger through wednesday before a
ridge averaging 30.00 inches moves over the lower great lakes 
thursday into friday.


lez162-163-272015-
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-
918 am edt mon jul 27 2026

.rest of today...west winds around 10 knots becoming southwest. a
slight chance of showers late this morning. a slight chance of
showers and thunderstorms late. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms early, then
showers with a chance of thunderstorms. a slight chance of
showers and thunderstorms late. waves 1 to 3 feet. 
.tuesday...northwest winds 15 to 20 knots becoming north. waves
1 to 3 feet building to 2 to 4 feet. 
.tuesday night...north winds 15 to 20 knots. waves 2 to 4 feet. 
.wednesday...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots becoming south 10 knots or
less. 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.

$$

fzus63 kdtx 270713
glfsc 
expires:202607271515;;680383

lake st clair forecast
national weather service detroit/pontiac mi
313 am edt mon jul 27 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...light and variable winds through monday give way to
stronger northerly winds for tuesday, gusting 25 to 30 knots
south half. potential for strong to severe thunderstorms, mainly
monday afternoon and evening along and ahead of a cold front.


lcz460-271515-
lake st clair-
313 am edt mon jul 27 2026

.today...southwest winds 5 to 10 knots increasing to 10 to 15 knots
in the afternoon. partly sunny. scattered showers and thunderstorms
late in the afternoon. waves 2 feet or less.
.tonight...southwest winds 5 to 10 knots veering to the west early
in the morning. partly cloudy becoming mostly cloudy by midnight
becoming partly cloudy. numerous thunderstorms in the evening.
numerous showers. scattered thunderstorms after midnight. waves 2
feet or less.
.tuesday...north winds 10 to 15 knots increasing to 15 to 20 knots
in the late morning and afternoon. partly sunny. scattered light
showers early in the morning. waves 1 to 3 feet.
.tuesday night...north winds 15 to 20 knots increasing to 20 to 25
knots in the late evening and overnight. mostly clear. waves 1 to 3
feet building to 2 to 4 feet in the late evening and overnight.
.wednesday...north winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots with gusts to 30 knots in the
afternoon and evening. mostly sunny in the morning becoming clear.
waves 1 to 3 feet. a small craft advisory may be needed.
.thursday...northeast winds 10 to 15 knots. clear. waves 2 feet or
less.
.friday...south winds 5 to 10 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 270712
glflh 
expires:202607271515;;680365

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am edt mon jul 27 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...light and variable winds through monday give way to
stronger northerly winds for tuesday, gusting 25 to 30 knots
south half. potential for strong to severe thunderstorms, mainly
monday afternoon and evening along and ahead of a cold front.


lhz362-363-271515-
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-
312 am edt mon jul 27 2026

.today...south winds 5 to 10 knots backing to the east late in
the afternoon. scattered showers and thunderstorms in the
afternoon. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots backing to the north in the
late evening and overnight. numerous showers and scattered
thunderstorms in the evening...then scattered showers after
midnight. waves 2 feet or less. 
.tuesday...north winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots early in the afternoon. scattered
showers in the morning. waves 3 to 5 feet. 
.tuesday night...north winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. waves 3 to 5 feet. 
.wednesday...north winds 15 to 20 knots becoming northwest 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
afternoon. 
.thursday...north winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.friday...light and variable winds becoming southeast 5 to
10 knots early in the evening...then becoming light and variable
by midnight. a chance of showers by midnight. waves 2 feet or
less. 


$$

fzus63 kdtx 270712
glflh 
expires:202607271515;;680366

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am edt mon jul 27 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...light and variable winds through monday give way to
stronger northerly winds for tuesday, gusting 25 to 30 knots
south half. potential for strong to severe thunderstorms, mainly
monday afternoon and evening along and ahead of a cold front.


lhz462>464-271515-
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-
312 am edt mon jul 27 2026

.today...south winds 5 to 10 knots. scattered showers and
thunderstorms in the afternoon. waves 2 feet or less. 
.tonight...south winds 5 to 10 knots. numerous thunderstorms and
scattered showers in the evening...then numerous showers and
scattered thunderstorms after midnight. waves 2 feet or less. 
.tuesday...north winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and afternoon. scattered showers in
the morning. waves 3 to 5 feet building to 5 to 7 feet early in
the afternoon. waves occasionally around 10 feet. 
.tuesday night...north winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots after midnight. waves 5 to
7 feet. waves occasionally around 10 feet. 
.wednesday...north winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.thursday...north winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots .
a chance of showers by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 270712
glflh 
expires:202607271515;;680364

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am edt mon jul 27 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...light and variable winds through monday give way to
stronger northerly winds for tuesday, gusting 25 to 30 knots
south half. potential for strong to severe thunderstorms, mainly
monday afternoon and evening along and ahead of a cold front.


lhz361-271515-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
312 am edt mon jul 27 2026

.today...light and variable winds becoming south 5 to 10 knots
late in the morning...then backing to the east early in the
afternoon backing to the north late in the afternoon. scattered
showers in the morning...then scattered showers and thunderstorms
in the afternoon. waves 2 feet or less. 
.tonight...north winds 5 to 10 knots early in the evening
becoming light and variable...then becoming north 5 to 10 knots
after midnight increasing to 10 to 15 knots. scattered showers
and thunderstorms in the evening...then scattered showers after
midnight. waves 2 feet or less. 
.tuesday...north winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 1 to 3 feet. 
.tuesday night...north winds 10 to 15 knots. waves 1 to 3 feet. 
.wednesday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the morning...then backing to the northwest late
in the afternoon. waves 2 feet or less. 
.thursday...light and variable winds. waves 2 feet or less. 
.friday...light and variable winds becoming southwest 5 to
10 knots by midnight. waves 2 feet or less. 


$$

fzus63 kmkx 270707
glflm 
expires:202607271515;;679844

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
207 am cdt mon jul 27 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...

patchy dense fog is expected in portions of the central to
northern lake michigan through tonight and potentially monday as 
warm moist air moves northward. 

severe storms are possible this morning and afternoon. 
waterspouts, very strong winds, and hail are possible with these 
storms. storms will move north to south across the lake late 
tonight. monday, expecting a cold front to progress north to south
across the lake in the afternoon hours. this will bring the next 
chances for severe weather, with strong winds and hail the main 
threats. northerly winds are expected behind the front, with gusts
around 30 kt expected. gusts to gale force cannot be ruled out as
low pressure deepens to 29.5 inches over the eastern great lakes 
tuesday. winds will remain northerly through wednesday as high 
pressure around 30.0 inches builds into the northern great lakes, 
then will become lighter and more variable into thursday and 
friday as high pressure builds overhead.


lmz080-669-671-673-675-777-779-870-872-874-876-878-271515-
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-
207 am cdt mon jul 27 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
patchy fog this morning. chance of showers and thunderstorms.
waves 3 to 5 ft. 
.tonight...southwest winds 15 to 25 kt veering to north to 30 kt.
chance of showers and thunderstorms in the evening. waves 3 to
5 ft building to 6 to 9 ft occasionally to 12 ft. 
.tuesday...north winds to 30 kt. waves 8 to 11 ft occasionally to
14 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 7 to 10 ft occasionally to 13 ft subsiding to
5 to 8 ft occasionally to 10 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.wednesday night...north winds 15 to 25 kt becoming northeast
5 to 10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...southeast winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.friday...southwest winds 10 to 15 kt becoming south. chance of
showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 270707
glflm 
expires:202607271515;;679843

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
207 am cdt mon jul 27 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...

patchy dense fog is expected in portions of the central to
northern lake michigan through tonight and potentially monday as 
warm moist air moves northward. 

severe storms are possible this morning and afternoon. 
waterspouts, very strong winds, and hail are possible with these 
storms. storms will move north to south across the lake late 
tonight. monday, expecting a cold front to progress north to south
across the lake in the afternoon hours. this will bring the next 
chances for severe weather, with strong winds and hail the main 
threats. northerly winds are expected behind the front, with gusts
around 30 kt expected. gusts to gale force cannot be ruled out as
low pressure deepens to 29.5 inches over the eastern great lakes 
tuesday. winds will remain northerly through wednesday as high 
pressure around 30.0 inches builds into the northern great lakes, 
then will become lighter and more variable into thursday and 
friday as high pressure builds overhead.


lmz261-362-364-366-563-565-567-868-271515-
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-
207 am cdt mon jul 27 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
patchy fog this morning. chance of showers and slight chance of
thunderstorms this morning, then chance of showers and
thunderstorms this afternoon. waves 3 to 5 ft. 
.tonight...north winds 10 to 20 kt increasing to 30 kt. chance of
showers and thunderstorms in the evening. waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft. 
.tuesday...north winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.wednesday...north winds 10 to 15 kt increasing to 15 to 25 kt in
the afternoon. waves 1 to 3 ft. 
.wednesday night...southeast winds 10 to 20 kt becoming south
5 to 10 kt. waves 1 to 3 ft subsiding to 1 ft or less. 
.thursday...south winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 ft or less. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684749

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz265-272000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
505 am edt mon jul 27 2026

.early this morning...north winds 5 to 15 knots. patchy fog. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.today...northeast winds 10 to 20 knots backing north late.
patchy fog. showers likely through early afternoon. a slight
chance of thunderstorms. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north late.
patchy fog through midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday...north winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots backing southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering west. waves
calm to 2 feet. 
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684750

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz266-272000-
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-
505 am edt mon jul 27 2026

...dense fog advisory in effect until noon edt today...

.early this morning...north winds 5 to 15 knots. areas of dense
fog. a slight chance of showers and thunderstorms. waves calm to
2 feet. 
.today...northeast winds 5 to 15 knots backing north in the
afternoon, then increasing to 10 to 20 knots late. patchy dense fog
through early afternoon. a chance of showers and a slight chance of 
thunderstorms. waves calm to 2 feet. 
.tonight...north winds 10 to 20 knots. patchy fog through
midnight. waves building to 2 to 4 feet. 
.tuesday...north winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684751

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz267-272000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
505 am edt mon jul 27 2026

...dense fog advisory in effect until noon edt today...

.early this morning...south winds 5 to 15 knots. areas of dense
fog. waves calm to 2 feet. 
.today...east winds 5 to 15 knots backing north in the afternoon,
then becoming northwest 10 to 20 knots late. areas of dense fog
through early afternoon. a chance of showers and thunderstorms. 
waves calm to 2 feet.
.tonight...northwest winds 10 to 20 knots becoming north 15 to
25 knots after midnight. patchy fog through midnight. waves
building to 2 to 4 feet. 
.tuesday...north winds 15 to 25 knots backing northwest 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 becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.friday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684748

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz264-272000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
505 am edt mon jul 27 2026

...dense fog advisory in effect until noon edt today...

.early this morning...northeast winds 5 to 15 knots. areas of
dense fog. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.today...northeast winds 5 to 15 knots backing north late. areas
of dense fog through early afternoon. patchy fog by mid
afternoon. a slight chance of thunderstorms through early
afternoon. a chance of showers. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. patchy fog. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots becoming northwest less than
10 knots in the afternoon, then backing southwest late. waves
calm to 2 feet. 
.tuesday night...southwest winds less than 10 knots backing south
after midnight. waves calm to 2 feet. 
.wednesday...south winds less than 10 knots becoming southeast
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots becoming south
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...south winds less than 10 knots becoming west 5 to
15 knots. a chance of showers. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684747

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz263-272000-
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-
505 am edt mon jul 27 2026

...dense fog advisory in effect until noon edt today...
...severe thunderstorm watch 518 in effect until 10 am edt this
morning...

.early this morning...northeast winds 5 to 15 knots. patchy dense fog.
a chance of showers and a slight chance of thunderstorms. some
thunderstorms could be severe. waves calm to 2 feet. 
.today...northeast winds 10 to 20 knots. patchy dense fog early. a 
slight chance of thunderstorms through early afternoon. some
thunderstorms could be severe early. a chance of showers. waves 
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.tonight...north winds 5 to 15 knots diminishing to less than
10 knots late. patchy fog. waves calm to 2 feet. 
.tuesday...northeast winds less than 10 knots becoming south 5 to
15 knots in the afternoon. patchy dense fog through early
afternoon. waves calm to 2 feet. 
.tuesday night...east winds less than 10 knots veering south
after midnight. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds less than 10 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering west. a chance
of showers. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 270905 cca
glfls 
expires:202607272000;;684746

open lake forecast for lake superior...corrected
national weather service marquette mi
505 am edt mon jul 27 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 29.6 inch clipper low skims over far western lake superior this 
morning before departing east towards the mid-atlantic this evening 
through tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior on tuesday and remains until 
thursday morning. the ridging then gives way to weak troughing of 
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches 
again the rest of this week.


lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
505 am edt mon jul 27 2026 /405 am cdt mon jul 27 2026/

...dense fog advisory in effect until noon edt /11 am cdt/
today...
...severe thunderstorm watch 518 in effect until 10 am edt /9 am
cdt/ this morning...

.early this morning...northeast winds 10 to 20 knots. patchy dense 
fog. a chance of showers and thunderstorms. some thunderstorms could
be severe. waves calm to 2 feet.
.today...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. patchy dense fog early. a chance of showers and a 
slight chance of thunderstorms. some thunderstorms could be severe
early. waves building to 1 to 3 feet, then subsiding to calm to 2 
feet.
.tonight...north winds 5 to 15 knots diminishing to less than
10 knots after midnight. patchy fog. waves calm to 2 feet. 
.tuesday...north winds less than 10 knots veering south in the
afternoon, then becoming east 5 to 15 knots late. patchy dense
fog through early afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...north winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering west. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 

$$