fzus61 kbuf 112002
glflo 
expires:202507120300;;276008

open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 29.6 inch low will lift across the upper great lakes 
tonight, then into northwest ontario on saturday, before reaching 
james bay on sunday while also deepening to 29.2 inches. in the 
process, the system will push a warm front across the lake saturday 
night, followed by a slow-moving trailing cold front later sunday 
into sunday night. a 30.1 inch high over the ohio valley will then 
build across the lower great lakes monday through wednesday.


loz063>065-120300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri jul 11 2025

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 112002
glflo 
expires:202507120300;;276007

open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 29.6 inch low will lift across the upper great lakes 
tonight, then into northwest ontario on saturday, before reaching 
james bay on sunday while also deepening to 29.2 inches. in the 
process, the system will push a warm front across the lake saturday 
night, followed by a slow-moving trailing cold front later sunday 
into sunday night. a 30.1 inch high over the ohio valley will then 
build across the lower great lakes monday through wednesday.


loz062-120300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt fri jul 11 2025

.tonight...southeast winds 10 knots or less becoming south. a
chance of showers and thunderstorms late. waves 1 foot or less. 
.saturday...southeast winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming
southwest. a chance of showers. waves 1 to 2 feet. 
.sunday...southwest winds around 10 knots. showers likely with a
chance of thunderstorms. waves 1 to 2 feet. 
.sunday night...southwest winds 5 to 10 knots becoming west. a
chance of showers and thunderstorms in the evening. waves 2 feet
or less. 
.monday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.tuesday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.wednesday...southwest winds 5 to 10 knots becoming west. a
chance of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 111936
glfle 
expires:202507120215;;275044

open lake forecast for lake erie
national weather service cleveland oh
336 pm 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...
the stationary front has now lifted northward across the northern
shore of lake erie and will continue the northward track tonight.
pressure will hold steady around 30.00 inches until a cold front
tracks across the lake late sunday into sunday night. high
pressure 30.10 inches moves in for monday through tuesday.



lez164>167-120215-
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-
336 pm edt fri jul 11 2025

.tonight...east winds 10 knots or less becoming south. a slight
chance of showers and thunderstorms through the early overnight.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots. a slight chance of showers
and thunderstorms late. waves 1 to 2 feet. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms. waves 1 to 2 feet. 
.sunday...west winds 5 to 15 knots. a chance of showers in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 2 feet or less. 
.sunday night...west winds 5 to 10 knots. a chance of showers and
thunderstorms in the evening. waves 2 feet or less. 
.monday...west 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. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 111936
glfle 
expires:202507120215;;275045

open lake forecast for lake erie
national weather service cleveland oh
336 pm 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...
the stationary front has now lifted northward across the northern
shore of lake erie and will continue the northward track tonight.
pressure will hold steady around 30.00 inches until a cold front
tracks across the lake late sunday into sunday night. high
pressure 30.10 inches moves in for monday through tuesday.



lez061-168-169-120215-
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-
336 pm edt fri jul 11 2025

.tonight...southeast winds 10 knots or less. a slight chance of
showers and thunderstorms late this evening. a chance of showers
and thunderstorms after midnight. waves 1 foot or less. 
.saturday...south winds 5 to 10 knots. 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 around 10 knots becoming west. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 to 2 feet. 
.sunday night...west winds 5 to 10 knots becoming southwest. a
chance of showers and thunderstorms in the evening. waves 1 to
2 feet. 
.monday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming southwest. a
chance of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 111936
glfle 
expires:202507120215;;275043

open lake forecast for lake erie
national weather service cleveland oh
336 pm 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...
the stationary front has now lifted northward across the northern
shore of lake erie and will continue the northward track tonight.
pressure will hold steady around 30.00 inches until a cold front
tracks across the lake late sunday into sunday night. high
pressure 30.10 inches moves in for monday through tuesday.



lez162-163-120215-
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-
336 pm edt fri jul 11 2025

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 111940
glfsc 
expires:202507120345;;275151

lake st clair forecast
national weather service detroit/pontiac mi
340 pm 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.


lcz460-120345-
lake st clair-
340 pm edt fri jul 11 2025

.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
in the afternoon. mostly sunny. showers likely and a chance of
thunderstorms in the afternoon. waves 2 feet or less.
.saturday night...southwest winds 10 to 15 knots. partly cloudy.
showers likely and a chance of thunderstorms in the evening. waves 2
feet or less.
.sunday...west winds 5 to 10 knots. partly sunny. waves 2 feet or
less.
.sunday night...northwest winds 5 to 10 knots. mostly clear. waves 2
feet or less.
.monday...west winds 5 to 10 knots backing to the southwest in the
afternoon and evening. clear. waves 2 feet or less.
.tuesday...southeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.
.wednesday...south winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 111940
glflh 
expires:202507120345;;275144

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm 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.


lhz361-362-120345-
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-
340 pm edt fri jul 11 2025

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


$$

fzus63 kdtx 111940
glflh 
expires:202507120345;;275145

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm 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>464-120345-
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-
340 pm edt fri jul 11 2025

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


$$

fzus63 kmkx 112004
glflm 
expires:202507120330;;276091

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
304 pm 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... 

a broad trough of low pressure averaging 29.7 inches will lift
from iowa into the northern great lakes tonight into saturday.
thunderstorms are expected across the lake tonight, some of which
may have strong winds. winds will be from the south over the 
southern half of the lake and from the northeast over the northern
half of the lake through early evening, becoming southerly over 
the entire lake overnight. a cold front will then pass through the
lake saturday afternoon and evening, with winds turning westerly 
saturday night. 

high pressure of 30.0 inches will move across the southern tip of
lake michigan on sunday, with winds turning southerly and
southwesterly as the high moves east. southerly flow is then
expected into at least monday, before a front becomes stationary
over the central portion of the lake through mid week. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-120330-
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-
304 pm cdt fri jul 11 2025

sheboygan wi to pentwater mi south...

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

$$

fzus63 kmkx 112004
glflm 
expires:202507120330;;276090

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
304 pm 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... 

a broad trough of low pressure averaging 29.7 inches will lift
from iowa into the northern great lakes tonight into saturday.
thunderstorms are expected across the lake tonight, some of which
may have strong winds. winds will be from the south over the 
southern half of the lake and from the northeast over the northern
half of the lake through early evening, becoming southerly over 
the entire lake overnight. a cold front will then pass through the
lake saturday afternoon and evening, with winds turning westerly 
saturday night. 

high pressure of 30.0 inches will move across the southern tip of
lake michigan on sunday, with winds turning southerly and
southwesterly as the high moves east. southerly flow is then
expected into at least monday, before a front becomes stationary
over the central portion of the lake through mid week. 


lmz261-362-364-366-563-565-567-868-120330-
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-
304 pm cdt fri jul 11 2025

sheboygan wi to pentwater mi north...

.tonight...east winds 5 to 10 kt becoming south 10 to 15 kt.
chance of showers and thunderstorms this evening, then showers
likely with a chance of thunderstorms overnight. waves 1 to 2 ft.
.saturday...south winds 10 to 20 kt becoming southwest. showers
likely with a chance of thunderstorms 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. waves 1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft. 
.sunday night...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday night...southwest winds 10 to 20 kt becoming south 5 to
10 kt. waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.wednesday...northwest winds 10 to 20 kt becoming north. chance
of showers. waves 2 to 4 ft.  

$$

fzus63 kmqt 112002
glfls 
expires:202507120800;;275998

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jul 11 2025 /301 pm cdt fri jul 11 2025/

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

$$

fzus63 kmqt 112002
glfls 
expires:202507120800;;275999

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz263-120800-
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 pm edt fri jul 11 2025

.late this afternoon...east winds 5 to 15 knots. 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 chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.saturday...west winds 5 to 15 knots. a chance of showers and
thunderstorms. areas of smoke by mid afternoon. waves calm to
2 feet. 
.saturday night...west winds 5 to 15 knots increasing to 10 to
20 knots late. 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 10 to 20 knots veering west after
midnight. a chance of showers. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...east winds 5 to 15 knots backing north. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 112002
glfls 
expires:202507120800;;276000

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz264-120800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri jul 11 2025

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots. a chance of showers and
a slight chance of thunderstorms after midnight. waves calm to
2 feet. 
.saturday...south winds 5 to 15 knots veering west in the
afternoon. a chance of showers and thunderstorms. areas of smoke
by mid afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots increasing to 10 to
20 knots late. 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 10 to 20 knots veering west after
midnight. a chance of showers. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.monday night...southwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing north. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 112002
glfls 
expires:202507120800;;276001

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz265-120800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri jul 11 2025

.late this afternoon...southeast winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering south late. a chance of
showers after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming northwest
10 to 20 knots in the afternoon, then backing west late. a chance
of showers and thunderstorms. areas of smoke by mid afternoon.
waves calm to 2 feet. 
.saturday night...west winds 10 to 20 knots. 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 veering northwest by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots backing southeast after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots veering northwest. a
chance of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 112002
glfls 
expires:202507120800;;276002

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz266-120800-
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 pm edt fri jul 11 2025

.late this afternoon...southeast winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...southeast winds 10 to 20 knots becoming south 5 to
15 knots after midnight. a slight chance of showers after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots becoming west 10 to
20 knots late. a chance of showers. a slight chance of
thunderstorms 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 and
thunderstorms through midnight. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots. 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. waves subsiding to calm to
2 feet. 
.monday night...west winds 5 to 15 knots backing southeast after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots veering northwest. a
chance of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...north 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 112002
glfls 
expires:202507120800;;276003

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

tonight 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.



lsz267-120800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri jul 11 2025

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

$$