fzus61 kbuf 110802
glflo 
expires:202605111500;;371110

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon may 11 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 30.4 inch high will build from the upper great 
lakes today to the lower great lakes by tuesday before drifting off 
the east coast tuesday night. a 29.7 inch low will then move from 
the central great lakes tuesday night to the lower great lakes 
wednesday before drifting to the eastern seaboard thursday. this low 
will remain over the gulf of maine through friday before moving into 
the canadian maritimes saturday.


loz063>065-111500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon may 11 2026

.today...west winds 5 to 15 knots. a chance of showers this
morning. waves 2 feet or less. 
.tonight...west winds 5 to 10 knots becoming north. waves 2 feet
or less. 
.tuesday...north winds 10 knots or less. waves 1 foot or less. 
.tuesday night...east winds 10 knots or less becoming southeast
and increasing to 15 to 20 knots overnight. showers overnight.
waves 1 foot or less building to 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots becoming southwest
and diminishing to 5 to 15 knots. showers. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming southwest. waves
1 foot or less. 

$$

fzus61 kbuf 110802
glflo 
expires:202605111500;;371109

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon may 11 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 30.4 inch high will build from the upper great 
lakes today to the lower great lakes by tuesday before drifting off 
the east coast tuesday night. a 29.7 inch low will then move from 
the central great lakes tuesday night to the lower great lakes 
wednesday before drifting to the eastern seaboard thursday. this low 
will remain over the gulf of maine through friday before moving into 
the canadian maritimes saturday.


loz062-111500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon may 11 2026

.today...northwest winds 5 to 10 knots becoming west. a chance of
showers early. waves 1 foot or less. 
.tonight...west winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.tuesday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.tuesday night...southeast winds 5 to 15 knots. showers. waves
1 to 3 feet. 
.wednesday...south winds 10 to 15 knots becoming west. showers.
waves 1 to 3 feet. 
.thursday...northwest winds 5 to 10 knots. a chance of showers
during the day. waves 1 to 2 feet. 
.friday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 

$$

fzus61 kcle 110739
glfle 
expires:202605111415;;370537

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 11 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 30.40 inches will continue building over the great 
lakes region today. this system will move east for tuesday. on 
tuesday afternoon, low pressure 29.60 inches will reach the 
northwest great lakes and extend a warm front over lake erie on 
tuesday night. this low will move southeast on wednesday, deepening 
to 29.50 inches, and extending a cold front across the lake on 
wednesday night. a trough averaging 29.90 inches will remain over 
the lake for thursday. high pressure 30.10 inches will enter for 
thursday night into friday.


lez061-168-169-111415-
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-
339 am edt mon may 11 2026

.today...southeast winds 10 knots or less becoming west. waves
1 foot or less. 
.tonight...northwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.tuesday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. showers likely in the evening, then showers
overnight. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely during the day, then a chance of showers
wednesday night. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.friday...west winds 10 knots or less becoming south. a chance of
showers friday night. waves 1 foot or less. 

$$

fzus61 kcle 110739
glfle 
expires:202605111415;;370535

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 11 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 30.40 inches will continue building over the great 
lakes region today. this system will move east for tuesday. on 
tuesday afternoon, low pressure 29.60 inches will reach the 
northwest great lakes and extend a warm front over lake erie on 
tuesday night. this low will move southeast on wednesday, deepening 
to 29.50 inches, and extending a cold front across the lake on 
wednesday night. a trough averaging 29.90 inches will remain over 
the lake for thursday. high pressure 30.10 inches will enter for 
thursday night into friday.


lez162>164-111415-
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-
339 am edt mon may 11 2026

.today...north winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.tonight...east winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...southeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.tuesday night...southeast winds 10 to 15 knots becoming
southwest and increasing to 15 to 25 knots. showers. waves 1 to
3 feet building to 3 to 5 feet. 
.wednesday...west winds 15 to 20 knots becoming northwest. a
chance of showers during the day. waves 2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots becoming southwest
5 to 15 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south 10 to
15 knots. a chance of showers friday night. waves 2 feet or less.

$$

fzus61 kcle 110739
glfle 
expires:202605111415;;370536

open lake forecast for lake erie
national weather service cleveland oh
339 am edt mon may 11 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 30.40 inches will continue building over the great 
lakes region today. this system will move east for tuesday. on 
tuesday afternoon, low pressure 29.60 inches will reach the 
northwest great lakes and extend a warm front over lake erie on 
tuesday night. this low will move southeast on wednesday, deepening 
to 29.50 inches, and extending a cold front across the lake on 
wednesday night. a trough averaging 29.90 inches will remain over 
the lake for thursday. high pressure 30.10 inches will enter for 
thursday night into friday.


lez165>167-111415-
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-
339 am edt mon may 11 2026

.today...south winds 5 to 10 knots becoming north. waves 2 feet
or less. 
.tonight...northeast winds 10 knots or less. waves 1 foot or
less. 
.tuesday...east winds 10 knots or less. waves 1 foot or less. 
.tuesday night...southeast winds 10 to 15 knots becoming
southwest and increasing to 15 to 25 knots. showers. waves 1 to
3 feet building to 3 to 6 feet. 
.wednesday...southwest winds 15 to 20 knots becoming northwest.
showers likely during the day, then a chance of showers wednesday
night. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 2 feet or less. 
.friday...southwest winds 10 knots or less becoming south 10 to
15 knots. a chance of showers friday night. waves 2 feet or less.

$$

fzus63 kdtx 110757
glflh 
expires:202605111600;;370859

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt mon may 11 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.30 inches, holds over the region
today and begins drifting eastward tonight while maintaining
light marine winds. the next low pressure system moves in late
tuesday bringing stronger winds and the next pattern of showers
and thunderstorms.


lhz361-362-111600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
357 am edt mon may 11 2026

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


$$

fzus63 kdtx 110757
glfsc 
expires:202605111600;;370862

lake st clair forecast
national weather service detroit/pontiac mi
357 am edt mon may 11 2026

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

.synopsis...high pressure, 30.30 inches, holds over the region
today and begins drifting eastward tonight while maintaining
light marine winds. the next low pressure system moves in late
tuesday bringing stronger winds and the next pattern of showers
and thunderstorms.


lcz460-111600-
lake st clair-
357 am edt mon may 11 2026

.today...north winds 5 to 10 knots. partly sunny. waves 2 feet or
less.
.tonight...northeast winds 10 to 15 knots becoming light and
variable. clear. waves 2 feet or less.
.tuesday...southeast winds 5 to 10 knots becoming south 15 to 20
knots. mostly sunny until late afternoon becoming cloudy. waves 2
feet or less.
.tuesday night...south winds 15 to 20 knots veering to the southwest
after midnight. becoming partly cloudy after midnight.
showers...then a chance of light showers after midnight. waves 1 to
3 feet building to 2 to 4 feet in the late evening and overnight.
.wednesday...west winds 10 to 15 knots becoming northwest 15 to 20
knots in the afternoon and evening. partly cloudy with a chance of
light showers. waves 1 to 3 feet.
.thursday...northeast winds 15 to 20 knots. partly cloudy. waves 2
feet or less.
.friday...south winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 110757
glflh 
expires:202605111600;;370860

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt mon may 11 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.30 inches, holds over the region
today and begins drifting eastward tonight while maintaining
light marine winds. the next low pressure system moves in late
tuesday bringing stronger winds and the next pattern of showers
and thunderstorms.


lhz363-462>464-111600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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 mon may 11 2026

.today...north winds 5 to 10 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet in the late morning and afternoon. 
.tonight...light and variable winds. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots becoming southeast 15 to
20 knots. showers in the afternoon. waves 1 to 3 feet building to
3 to 5 feet early in the afternoon. 
.tuesday night...southeast winds 20 to 25 knots with gusts to
around 30 knots becoming south 10 to 15 knots after midnight.
showers. waves 6 to 9 feet. waves occasionally around 12 feet. 
.wednesday...south winds 10 to 15 knots veering to the west late
in the morning...then becoming northwest 15 to 20 knots late in
the afternoon. a chance of showers. waves 3 to 5 feet. 
.thursday...northwest winds 15 to 20 knots becoming light and
variable. waves 3 to 5 feet subsiding to 1 to 3 feet by midnight.
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots
. a chance of showers . waves 2 feet or less building to 2 to
4 feet . 


$$

fzus63 kmkx 110754
glflm 
expires:202605111515;;370832

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
254 am cdt mon may 11 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...

high pressure around 30.4 inches is expected to move from 
southern manitoba to over lake michigan today. light to modest 
north to northeast winds today should become southeast to south 
tonight. 

low pressure around 29.7 inches should then move gradually east 
southeast across the region tuesday into tuesday night. the low 
will bring a cold front southeast through the region. gusty south 
to southeast winds are expected ahead of the front tuesday, with a
few gales possible during a brief period tuesday afternoon. winds
then veer west to northwest behind it and remain gusty for 
tuesday night into wednesday.

high pressure around 30.3 inches should move southeast into the 
region wednesday night into thursday, bringing lighter winds. 
gusty south winds may then develop friday. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-111515-
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-
254 am cdt mon may 11 2026

sheboygan wi to pentwater mi south...

.today...northeast winds 15 to 25 kt becoming north 10 to 20 kt.
waves 1 to 3 ft. 
.tonight...northeast winds 10 to 20 kt diminishing to 10 to 15 kt
late in the evening, then becoming southeast 5 to 10 kt after
midnight increasing to 10 to 15 kt late. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.tuesday...south winds 10 to 20 kt increasing to 30 kt. chance of
rain showers. waves 1 to 3 ft building to 7 to 10 ft occasionally
to 13 ft. 
.tuesday night...southwest winds to 30 kt becoming west 15 to
25 kt. chance of rain showers in the evening. waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft. 
.wednesday night...north winds to 30 kt diminishing to 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.thursday...north winds 10 to 20 kt. waves 2 to 4 ft subsiding to
1 to 3 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally
to 12 ft.  

$$

fzus63 kmkx 110754
glflm 
expires:202605111515;;370831

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
254 am cdt mon may 11 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...

high pressure around 30.4 inches is expected to move from 
southern manitoba to over lake michigan today. light to modest 
north to northeast winds today should become southeast to south 
tonight. 

low pressure around 29.7 inches should then move gradually east 
southeast across the region tuesday into tuesday night. the low 
will bring a cold front southeast through the region. gusty south 
to southeast winds are expected ahead of the front tuesday, with a
few gales possible during a brief period tuesday afternoon. winds
then veer west to northwest behind it and remain gusty for 
tuesday night into wednesday.

high pressure around 30.3 inches should move southeast into the 
region wednesday night into thursday, bringing lighter winds. 
gusty south winds may then develop friday. 


lmz261-362-364-366-563-565-567-868-111515-
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-
254 am cdt mon may 11 2026

sheboygan wi to pentwater mi north...

.today...north winds 5 to 10 kt increasing to 10 to 15 kt late
this morning, then becoming northwest 10 to 20 kt early this
afternoon backing to south late. waves 1 to 2 ft. 
.tonight...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft. 
.tuesday...south winds 15 to 25 kt increasing to 30 kt. rain 
showers. waves 2 to 4 ft building to 8 to 11 ft occasionally to 14
ft. 
.tuesday night...southwest winds 15 to 25 kt becoming northwest
10 to 20 kt. chance of rain showers. waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday...northwest winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.wednesday night...north winds to 30 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally
to 12 ft.  

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371082

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz266-112000-
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 may 11 2026

...gale watch in effect from tuesday morning through tuesday
evening...
...gale watch in effect from wednesday morning through wednesday
afternoon...

.early this morning...northwest winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...northwest winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming south 5 to 15 knots
late. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 20 to 30 knots late.
waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south gales to 35 knots backing southeast in the
afternoon, then diminishing to 20 to 30 knots late. rain showers.
waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday night...southeast winds 15 to 25 knots becoming north
20 to 30 knots after midnight. a chance of rain showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.wednesday...north gales to 35 knots backing northwest by mid
afternoon. a chance of rain showers through early afternoon.
waves building to 5 to 9 feet occasionally to 11 feet. 
.wednesday night...northwest winds 20 to 30 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...southeast winds 5 to 15 knots becoming south 20 to
30 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 
.friday...south gales to 35 knots diminishing to 15 to 25 knots.
a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371083

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz267-112000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon may 11 2026

.early this morning...north winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...northwest winds 5 to 15 knots backing west late. waves
calm to 2 feet. 
.tonight...south winds less than 10 knots becoming southeast 5 to
15 knots after midnight, then becoming south 10 to 20 knots late.
waves calm to 2 feet. 
.tuesday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a chance of rain showers through early
afternoon, then rain showers by mid afternoon. waves building to
3 to 6 feet occasionally to 8 feet. 
.tuesday night...southeast winds 15 to 25 knots backing north
after midnight. rain showers likely through midnight, then a
chance of rain showers after midnight. waves subsiding to 2 to
4 feet. 
.wednesday...north winds 20 to 30 knots backing northwest by mid
afternoon. a chance of rain 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. 
.wednesday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...northwest winds 5 to 15 knots becoming south 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.friday...south winds 15 to 25 knots. a chance of rain showers.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371078

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz162-112000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon may 11 2026 /301 am cdt mon may 11 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots. rain showers likely and a
slight chance of thunderstorms after midnight. waves building to
1 to 3 feet. 
.tuesday...southeast winds 10 to 20 knots veering northwest late.
a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots veering north
after midnight. a slight chance of rain showers through midnight.
waves 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming south 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday...south winds 15 to 25 knots becoming north 10 to
20 knots. a chance of rain showers. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371079

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz263-112000-
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 may 11 2026

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots becoming south 5 to
15 knots in the afternoon, then backing east late. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering south late. a chance of
rain showers after midnight. waves building to 2 to 4 feet. 
.tuesday...southeast winds 15 to 25 knots becoming west 10 to
20 knots late. rain showers through early afternoon, then a
chance of rain showers by mid afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north winds 10 to 20 knots. a slight chance of
snow showers through midnight. a slight chance of rain showers.
waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming south
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming south 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...south winds 15 to 25 knots becoming north 10 to
20 knots. a chance of rain showers. waves subsiding to 2 to
4 feet. 

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371080

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz264-112000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon may 11 2026

...gale watch in effect from tuesday morning through tuesday
evening...

.early this morning...northwest winds less than 10 knots. waves
calm to 2 feet. 
.today...northwest winds less than 10 knots becoming south 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming south 15 to 25 knots late.
waves building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots becoming southeast gales to
35 knots in the afternoon, then diminishing to 20 to 30 knots
late. rain showers through early afternoon, then a chance of rain
showers by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of snow showers through
midnight. a chance of rain showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.wednesday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots becoming south 15 to
25 knots. a chance of rain showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday...south winds 20 to 30 knots becoming north 10 to
20 knots. a chance of rain showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 110802
glfls 
expires:202605112000;;371081

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon may 11 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 30.3 inch high continues over the upper great lakes today before 
departing for the lower great lakes this evening. behind it, a 29.6 
inch clipper descends over far western lake superior on tuesday. as 
the clipper continues eastward towards the st. lawrence seaway 
tuesday night and wednesday, 30.1 inch high pressure ridging moves 
back over lake superior late in the day on wednesday. this ridging 
is pressed southeast to the lower great lakes thursday into friday 
while a 29.1 inch low emanates off the northern rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior on 
friday.



lsz265-112000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon may 11 2026

...gale watch in effect from tuesday morning through tuesday
evening...
...gale watch in effect from wednesday morning through wednesday
afternoon...

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering south late. waves building
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 20 to 30 knots becoming southeast gales to
35 knots in the afternoon, then diminishing to 20 to 30 knots
late. rain showers through early afternoon, then a chance of rain
showers by mid afternoon. waves building to 4 to 8 feet
occasionally to 10 feet. 
.tuesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest gales to 35 knots. a chance of rain
showers through early afternoon. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots becoming south 20 to
30 knots. a chance of rain showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday...southeast winds 20 to 30 knots becoming north 15 to
25 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 

$$