fzus61 kbuf 110954
glflo 
expires:202507111515;;253118

open lake forecast for lake ontario
national weather service buffalo ny
554 am edt fri jul 11 2025

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 broad 29.9 inch surface low will track across the mid-
atlantic states today. a 29.7 inch low will then lift across the 
upper great lakes saturday and to james bay on sunday, and in the 
process will push its warm front across the lake saturday night, 
followed by its trailing cold front sunday. a 30.0 inch high over 
the ohio valley will then build across the lower great lakes monday 
and tuesday.


loz063>065-111515-
lake ontario open waters from hamlin beach to the saint lawrence
river-
554 am edt fri jul 11 2025

.today...southwest winds less than 10 knots becoming northeast.
waves 1 foot or less. 
.tonight...east winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming east. a chance of
showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.saturday night...southeast winds 5 to 15 knots becoming south. a
chance of showers and thunderstorms in the evening. waves 2 feet
or less. 
.sunday...south winds 5 to 15 knots becoming west. showers with
thunderstorms likely during the day, then showers with a chance
of thunderstorms sunday night. waves 2 feet or less. 
.monday...west winds 5 to 10 knots becoming southwest. a chance
of showers and thunderstorms during the day. waves 1 foot or
less. 
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 110954
glflo 
expires:202507111515;;253117

open lake forecast for lake ontario
national weather service buffalo ny
554 am edt fri jul 11 2025

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 broad 29.9 inch surface low will track across the mid-
atlantic states today. a 29.7 inch low will then lift across the 
upper great lakes saturday and to james bay on sunday, and in the 
process will push its warm front across the lake saturday night, 
followed by its trailing cold front sunday. a 30.0 inch high over 
the ohio valley will then build across the lower great lakes monday 
and tuesday.


loz062-111515-
lake ontario open waters from the niagara river to hamlin beach-
554 am edt fri jul 11 2025

.today...light and variable winds. waves 1 foot or less. 
.tonight...southeast winds 10 knots or less becoming south. a
chance of showers after midnight. a chance of showers and
thunderstorms late. waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming east. a chance of
showers and thunderstorms in the morning, then a chance of
showers in the afternoon. waves 1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms. waves 2 feet or less. 
.monday...west winds 10 knots or less. waves 1 foot or less. 
.tuesday...west winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 110739
glfle 
expires:202507111415;;247011

open lake forecast for lake erie
national weather service cleveland oh
339 am edt fri jul 11 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will stall over the ohio valley today before lifting
north across the lake tonight. low pressure 29.70 inches will 
move northeast across the upper great lakes on saturday into 
sunday, extending a cold front east through the area on sunday. 
high pressure 30.00 inches will build in by monday into tuesday.


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 fri jul 11 2025

.today...south winds less than 10 knots becoming east. waves
1 foot or less. 
.tonight...east winds 10 knots or less becoming south. a slight
chance of showers and thunderstorms early, then a chance of
showers and thunderstorms. a slight chance of showers and
thunderstorms late. waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.saturday night...south winds 5 to 10 knots becoming southwest. a
chance of showers and thunderstorms. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers sunday night. waves 1 to 2 feet. 
.monday...west winds less than 10 knots becoming southwest. waves
1 foot or less. 
.tuesday...south winds 10 knots or less. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 110739
glfle 
expires:202507111415;;247009

open lake forecast for lake erie
national weather service cleveland oh
339 am edt fri jul 11 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will stall over the ohio valley today before lifting
north across the lake tonight. low pressure 29.70 inches will 
move northeast across the upper great lakes on saturday into 
sunday, extending a cold front east through the area on sunday. 
high pressure 30.00 inches will build in by monday into tuesday.


lez162-163-111415-
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-
339 am edt fri jul 11 2025

.today...south winds 5 to 10 knots. a slight chance of showers
late this morning. a chance of showers and thunderstorms this
afternoon. waves 1 foot or less. 
.tonight...south winds 5 to 10 knots. a chance of showers and
thunderstorms early, then a slight chance of showers and
thunderstorms. waves 1 foot or less. 
.saturday...southwest winds around 10 knots. a chance of showers
and thunderstorms in the afternoon. waves 1 foot or less. 
.saturday night...southwest winds around 10 knots becoming west.
a chance of showers and thunderstorms in the evening, then a
chance of showers overnight. waves 1 foot or less. 
.sunday...west winds 5 to 10 knots becoming northwest. a chance
of showers and thunderstorms during the day. waves 1 foot or
less. 
.monday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 110739
glfle 
expires:202507111415;;247010

open lake forecast for lake erie
national weather service cleveland oh
339 am edt fri jul 11 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will stall over the ohio valley today before lifting
north across the lake tonight. low pressure 29.70 inches will 
move northeast across the upper great lakes on saturday into 
sunday, extending a cold front east through the area on sunday. 
high pressure 30.00 inches will build in by monday into tuesday.


lez164>167-111415-
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-
339 am edt fri jul 11 2025

.today...southwest winds 10 knots or less becoming southeast. a
slight chance of showers and thunderstorms late. waves 1 foot or
less. 
.tonight...southeast winds 5 to 10 knots becoming south. a chance
of thunderstorms with a slight chance of showers early, then a
chance of showers and thunderstorms. waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day. waves
2 feet or less. 
.monday...northwest winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday...west winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 110759
glflh 
expires:202507111600;;247663

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt fri jul 11 2025

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...chances for showers and thunderstorms through the day
today which brings the chance for some elevated wind gusts under
strong storm development. a cold front then moves across the
great lakes late tomorrow into sunday, bringing additional
chances for showers and storms.


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-
359 am edt fri jul 11 2025

.today...light and variable winds becoming southeast 5 to
10 knots in the afternoon. waves 2 feet or less. 
.tonight...southeast winds 5 to 10 knots veering to the south
early in the morning. a chance of showers and thunderstorms in
the evening...then a chance of showers after midnight. waves
2 feet or less. 
.saturday...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. a chance of showers
and thunderstorms in the afternoon. waves 1 to 3 feet. 
.saturday night...south winds 10 to 15 knots becoming southwest
5 to 10 knots in the late evening and overnight. a chance of
showers and thunderstorms in the evening. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
late in the afternoon...then becoming light and variable late in
the evening. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots backing to the south
until early morning. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots backing to the southeast
until early morning. waves 2 feet or less. 


$$

fzus63 kdtx 110759
glflh 
expires:202507111600;;247662

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt fri jul 11 2025

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...chances for showers and thunderstorms through the day
today which brings the chance for some elevated wind gusts under
strong storm development. a cold front then moves across the
great lakes late tomorrow into sunday, bringing additional
chances for showers and storms.


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-
359 am edt fri jul 11 2025

.today...light and variable winds becoming east 5 to 10 knots in
the late morning and afternoon. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots. a chance of showers. waves
1 to 3 feet. 
.saturday...east winds 5 to 10 knots becoming southeast 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 1 to 3 feet. 
.saturday night...southeast winds 5 to 10 knots veering to the
southwest in the late evening and overnight. a chance of showers
and thunderstorms in the evening. waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots backing to the southeast late
in the afternoon...then veering to the southwest late in the
evening. waves 1 to 3 feet. 
.monday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...light and variable winds becoming southeast 5 to
10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 110759
glfsc 
expires:202507111600;;247665

lake st clair forecast
national weather service detroit/pontiac mi
359 am edt fri jul 11 2025

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...chances for showers and thunderstorms through the day
today which brings the chance for some elevated wind gusts under
strong storm development. a cold front then moves across the
great lakes late tomorrow into sunday, bringing additional
chances for showers and storms.


lcz460-111600-
lake st clair-
359 am edt fri jul 11 2025

.today...light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. partly sunny. a chance of showers
and thunderstorms in the afternoon. waves 2 feet or less.
.tonight...south winds 5 to 10 knots. partly cloudy. a chance of
showers and thunderstorms in the evening. waves 2 feet or less.
.saturday...south winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. mostly sunny. a chance of showers and
thunderstorms in the afternoon. waves 2 feet or less.
.saturday night...southwest winds 10 to 15 knots becoming west 5 to
10 knots after midnight. partly cloudy. a chance of showers and
thunderstorms in the evening. waves 2 feet or less.
.sunday...west winds 5 to 10 knots. partly sunny with a chance of
light showers in the morning...then partly cloudy with a chance of
showers and thunderstorms in the afternoon and evening. waves 2 feet
or less.
.monday...south winds 5 to 10 knots. clear. waves 2 feet or less.
.tuesday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kmkx 110813
glflm 
expires:202507111515;;248873

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt fri jul 11 2025

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... 

active pattern today into saturday with periods of thunderstorms 
as a broad low pressure around 29.8 inches slowly lifts across 
northern il/southern wi today before merging into a stronger low 
pressure of 29.7 inches tracking across ontario into saturday. 
this will result in increasing southerly winds ahead of the system
but as the low moves overhead saturday expect light winds before 
it pushes out of the area. expect a brief window of more westerly 
winds overnight saturday into sunday as high pressure around 30.0 
inches skirts to the south of lake michigan. southerly winds then 
return later sunday into the start of next week as the high 
pressure slides further east.


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-
313 am cdt fri jul 11 2025

sheboygan wi to pentwater mi north...

.today...southeast winds 5 to 10 kt becoming east. slight chance
of showers. waves 1 to 2 ft. 
.tonight...east winds 10 to 15 kt becoming south. slight chance
of showers in the evening, then chance of showers and slight
chance of thunderstorms overnight. waves 1 to 2 ft. 
.saturday...south winds 10 to 15 kt becoming southwest 10 to
20 kt. showers likely in the morning, then chance of showers and
thunderstorms in the afternoon. waves 1 to 3 ft. 
.saturday night...southwest winds 10 to 20 kt becoming west 10 to
15 kt. chance of thunderstorms in the evening. waves 1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming southwest. waves 1 to
2 ft. 
.sunday night...southwest winds 10 to 20 kt. waves 1 to 2 ft. 
.monday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 110813
glflm 
expires:202507111515;;248874

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt fri jul 11 2025

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... 

active pattern today into saturday with periods of thunderstorms 
as a broad low pressure around 29.8 inches slowly lifts across 
northern il/southern wi today before merging into a stronger low 
pressure of 29.7 inches tracking across ontario into saturday. 
this will result in increasing southerly winds ahead of the system
but as the low moves overhead saturday expect light winds before 
it pushes out of the area. expect a brief window of more westerly 
winds overnight saturday into sunday as high pressure around 30.0 
inches skirts to the south of lake michigan. southerly winds then 
return later sunday into the start of next week as the high 
pressure slides further east.


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-
313 am cdt fri jul 11 2025

sheboygan wi to pentwater mi south...

.today...south winds 10 to 20 kt becoming southwest 10 to 15 kt.
chance of showers and slight chance of thunderstorms this
morning, then slight chance of showers and thunderstorms this
afternoon. waves 1 to 3 ft. 
.tonight...south winds 10 to 15 kt. chance of showers and
thunderstorms. waves 1 to 3 ft. 
.saturday...southwest winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 2 to 4 ft. 
.saturday night...southwest winds 10 to 15 kt becoming west.
chance of thunderstorms in the evening. waves 1 to 3 ft. 
.sunday...northwest winds 10 to 15 kt becoming west. waves 1 to
3 ft. 
.sunday night...southwest winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 to 2 ft. 
.monday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247870

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



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 fri jul 11 2025

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...southwest winds less than 10 knots backing south in the
afternoon, then becoming southeast 5 to 15 knots late. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. a chance of showers. waves calm to 2 feet. 
.saturday...west winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing southwest late. showers
likely through early afternoon. a slight chance of thunderstorms.
a chance of showers by mid afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a slight chance of showers through
midnight. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing southeast. waves
subsiding to calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing northeast. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247871

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



lsz265-112000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt fri jul 11 2025

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots backing east in the afternoon,
then becoming southeast 10 to 20 knots late. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots veering south late. a
chance of showers. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots increasing to 10 to 20 knots
late. showers likely and a slight chance of thunderstorms. waves
calm to 2 feet. 
.saturday night...west winds 10 to 20 knots. a slight chance of
showers through midnight. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.monday...west winds 10 to 20 knots becoming southeast 5 to
15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots veering south. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247868

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



lsz162-112000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt fri jul 11 2025 /301 am cdt fri jul 11 2025/

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots backing east late. a slight
chance of showers and thunderstorms by mid afternoon. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight, then veering southwest late. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west 10 to
20 knots late. showers likely through early afternoon. a chance
of thunderstorms. a chance of showers by mid afternoon. waves
calm to 2 feet. 
.saturday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.monday...southwest winds 5 to 15 knots becoming east 10 to
20 knots. a chance of showers and thunderstorms. waves calm to
2 feet. 
.tuesday...east winds 10 to 20 knots backing northeast. a chance
of showers. a chance of thunderstorms. showers likely. waves calm
to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247873

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



lsz267-112000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt fri jul 11 2025

.early this morning...south winds 10 to 20 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots backing east in the afternoon.
waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots veering southwest in
the afternoon, then veering west late. a chance of showers
through early afternoon. a chance of thunderstorms. showers
likely by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 10 to 20 knots veering west
after midnight. a chance of showers through midnight. waves calm
to 2 feet. 
.sunday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots backing southeast. waves calm
to 2 feet. 
.tuesday...south winds 10 to 20 knots. a chance of showers. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247872

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



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 fri jul 11 2025

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

$$

fzus63 kmqt 110801
glfls 
expires:202507112000;;247869

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 11 2025

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 weak 29.9 inch ridge holds over eastern lake superior this 
morning. today through saturday afternoon, a 29.8 inch trough will 
move across the lake. this trough will first be associated with a 
29.7 inch low over hudson bay, but by saturday morning the trough 
will be associated with a secondary 29.7 inch low over northern 
ontario. this low deepens to 29.6 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.4 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday.



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 fri jul 11 2025

.early this morning...southwest winds less than 10 knots. waves
calm to 2 feet. 
.today...southwest winds less than 10 knots backing south in the
afternoon, then becoming east 5 to 15 knots late. a slight chance
of showers by mid afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight, then diminishing to less than 10 knots late. a slight
chance of showers through midnight. a slight chance of
thunderstorms. showers likely after midnight. waves calm to
2 feet. 
.saturday...west winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing southwest late. showers
likely through early afternoon. a chance of thunderstorms. a
chance of showers by mid afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing east. a chance of
showers and thunderstorms. waves subsiding to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east. a chance of
showers and thunderstorms. waves calm to 2 feet. 

$$