fzus61 kbuf 310803
glflo 
expires:202607311500;;378257

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt fri jul 31 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 high pressure ridge averaging 30.0 inches builds from the west 
today before exiting slowly eastward friday through sunday. a cold 
front should sweep southeastward across lake ontario sunday night 
through monday morning. behind the front, another ridge averaging 
30.0 inches should build southeastward across lake ontario through 
tuesday.


loz062-311500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt fri jul 31 2026

.today...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.tonight...south winds 10 knots or less becoming southwest. waves
1 foot or less. 
.saturday...southwest winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday night...east winds 5 to 10 knots. a chance of showers
in the evening, then showers overnight. waves 1 foot or less. 
.sunday...east winds 5 to 10 knots becoming northwest. showers
with a chance of thunderstorms. waves 1 foot or less. 
.monday...northwest winds 10 knots or less. waves 2 feet or less.
.tuesday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 310803
glflo 
expires:202607311500;;378258

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt fri jul 31 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 high pressure ridge averaging 30.0 inches builds from the west 
today before exiting slowly eastward friday through sunday. a cold 
front should sweep southeastward across lake ontario sunday night 
through monday morning. behind the front, another ridge averaging 
30.0 inches should build southeastward across lake ontario through 
tuesday.


loz063>065-311500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt fri jul 31 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310743
glfle 
expires:202607311415;;377832

open lake forecast for lake erie
national weather service cleveland oh
343 am edt fri jul 31 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 30.10 inches will remain over the region today
before low pressure 29.60 inches enters from the west on saturday
and slowly passes south of the lake through sunday. high pressure
30.00 inches will build back into the great lakes region for the
start of next week.


lez165>167-311415-
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-
343 am edt fri jul 31 2026

.today...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.tonight...southwest winds 10 knots or less 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 10 to 15 knots becoming southeast.
showers with a chance of thunderstorms. waves 2 feet or less. 
.sunday...southeast winds 5 to 15 knots becoming north. showers
with a chance of thunderstorms during the day, then a chance of
showers and thunderstorms sunday night. waves 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.tuesday...east winds 5 to 10 knots becoming southeast. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310743
glfle 
expires:202607311415;;377833

open lake forecast for lake erie
national weather service cleveland oh
343 am edt fri jul 31 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 30.10 inches will remain over the region today
before low pressure 29.60 inches enters from the west on saturday
and slowly passes south of the lake through sunday. high pressure
30.00 inches will build back into the great lakes region for the
start of next week.


lez061-168-169-311415-
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-
343 am edt fri jul 31 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310743
glfle 
expires:202607311415;;377831

open lake forecast for lake erie
national weather service cleveland oh
343 am edt fri jul 31 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 30.10 inches will remain over the region today
before low pressure 29.60 inches enters from the west on saturday
and slowly passes south of the lake through sunday. high pressure
30.00 inches will build back into the great lakes region for the
start of next week.


lez162>164-311415-
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-
343 am edt fri jul 31 2026

.today...west winds 10 knots or less becoming southeast. waves
1 foot or less. 
.tonight...southeast winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...southeast winds 5 to 15 knots. a chance of showers
and thunderstorms in the afternoon. waves 2 feet or less. 
.saturday night...southeast winds 10 to 15 knots becoming east.
showers with a chance of thunderstorms. waves 1 to 2 feet. 
.sunday...east winds 10 to 15 knots becoming north. showers with
a chance of thunderstorms during the day, then a chance of
showers and thunderstorms sunday night. waves 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 310743
glfsc 
expires:202607311600;;377835

lake st clair forecast
national weather service detroit/pontiac mi
343 am edt fri jul 31 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, governs great lakes
conditions today. low pressure then tracks into the ohio valley
this weekend, with local pressure averaging around 29.90 inches.
this brings rain and isolated thunderstorm chances to the great
lakes friday night into sunday along with elevated winds and
waves into saginaw bay and the thumb nearshores.


lcz460-311600-
lake st clair-
343 am edt fri jul 31 2026

.today...light and variable winds becoming southeast 5 to 10 knots
in the afternoon. mostly sunny. waves 2 feet or less.
.tonight...south winds 5 to 10 knots backing to the southeast early
in the morning. cloudy. a chance of light showers after midnight.
waves 2 feet or less.
.saturday...east winds 5 to 10 knots. cloudy. a chance of light
showers in the late morning and early afternoon. light showers
likely early in the afternoon. waves 2 feet or less.
.saturday night...northeast winds 10 to 15 knots. showers...then
light showers likely after midnight. waves 2 feet or less.
.sunday...northeast winds 10 to 15 knots becoming north 15 to 20
knots in the evening. partly sunny with showers likely and a chance
of thunderstorms...then partly cloudy in the evening. waves 1 to 3
feet.
.monday...northeast winds 15 to 20 knots. mostly clear. waves 2 feet
or less.
.tuesday...east winds 5 to 10 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 310743
glflh 
expires:202607311600;;377826

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 am edt fri jul 31 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, governs great lakes
conditions today. low pressure then tracks into the ohio valley
this weekend, with local pressure averaging around 29.90 inches.
this brings rain and isolated thunderstorm chances to the great
lakes friday night into sunday along with elevated winds and
waves into saginaw bay and the thumb nearshores.


lhz361-311600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
343 am edt fri jul 31 2026

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


$$

fzus63 kdtx 310743
glflh 
expires:202607311600;;377827

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 am edt fri jul 31 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, governs great lakes
conditions today. low pressure then tracks into the ohio valley
this weekend, with local pressure averaging around 29.90 inches.
this brings rain and isolated thunderstorm chances to the great
lakes friday night into sunday along with elevated winds and
waves into saginaw bay and the thumb nearshores.


lhz362-363-311600-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
343 am edt fri jul 31 2026

.today...light and variable winds becoming south 5 to 10 knots in
the late morning and early afternoon...then backing to the
southeast late in the afternoon. waves 2 feet or less. 
.tonight...light and variable winds becoming south 5 to 10 knots
in the late evening and overnight. a chance of showers. waves
2 feet or less. 
.saturday...light and variable winds. a chance of showers. waves
2 feet or less. 
.saturday night...northeast winds 5 to 10 knots. showers in the
evening...then a chance of showers after midnight. waves 2 feet
or less. 
.sunday...northeast winds 10 to 15 knots becoming north 5 to
10 knots late in the afternoon. a chance of showers in the
morning. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
evening. 
.monday...north winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...light and variable winds becoming north 5 to 10 knots
in the late morning and early afternoon...then veering to the
southeast . waves 2 feet or less. 


$$

fzus63 kdtx 310743
glflh 
expires:202607311600;;377828

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 am edt fri jul 31 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, governs great lakes
conditions today. low pressure then tracks into the ohio valley
this weekend, with local pressure averaging around 29.90 inches.
this brings rain and isolated thunderstorm chances to the great
lakes friday night into sunday along with elevated winds and
waves into saginaw bay and the thumb nearshores.


lhz462>464-311600-
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-
343 am edt fri jul 31 2026

.today...light and variable winds becoming south 5 to 10 knots
late in the morning...then becoming light and variable early in
the afternoon becoming southeast 5 to 10 knots late in the
afternoon. waves 2 feet or less. 
.tonight...light and variable winds becoming north 5 to 10 knots
after midnight. a chance of showers after midnight. waves 2 feet
or less. 
.saturday...north winds 5 to 10 knots. a chance of showers in the
morning...then showers likely in the afternoon. waves 2 feet or
less. 
.saturday night...north winds 5 to 10 knots. showers likely.
waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots becoming north 15 to
20 knots with gusts to around 30 knots late in the morning...then
decreasing to 10 to 15 knots late in the evening. showers likely
in the morning...then a chance of showers late in the morning.
waves 1 to 3 feet building to 3 to 5 feet. 
.monday...north winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 1 to 3 feet. 
.tuesday...east winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kmkx 310819
glflm 
expires:202607311515;;379488

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
319 am cdt fri jul 31 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 30.0 inches will linger over lake michigan
through this morning, with low pressure over the central plains
deepening to 29.6 inches as it moves into eastern iowa this
evening. this will shift winds to easterly overnight tonight.
saturday, expect winds to shift to northeasterly as low pressure
moves into the ohio valley and deepens to 29.5 inches. gusts to 30
kt are expected saturday afternoon through sunday afternoon for
the southern two-thirds. an isolated gale is possible sunday
afternoon as low pressure lifts into michigan. a small craft
advisory is in effect for southern wisconsin nearshore zones from
late tonight into sunday night due to gusty winds and building
waves. low pressure will finally exit into sunday night with 
winds diminishing into monday. high pressure returns monday into 
tuesday, bringing light and variable winds. tuesday night into 
wednesday, southerly winds become dominant as a low pressure 
system develops in the plains.


lmz261-362-364-366-563-565-567-868-311515-
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-
319 am cdt fri jul 31 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 5 to 10 kt increasing to 10 to 20 kt,
then diminishing to 10 to 15 kt late. slight chance of showers
and thunderstorms this afternoon. waves 1 to 2 ft. 
.tonight...west winds 10 to 15 kt veering to northeast 10 to
20 kt. chance of showers and slight chance of thunderstorms.
patchy smoke overnight. waves 1 to 3 ft building to 2 to 4 ft. 
.saturday...northeast winds 10 to 20 kt increasing to 15 to
25 kt. chance of showers. waves 3 to 5 ft. 
.saturday night...north winds 15 to 25 kt becoming northeast.
chance of showers in the evening. waves 4 to 6 ft occasionally to
8 ft. 
.sunday...northeast winds to 30 kt becoming north. waves 4 to
7 ft occasionally to 9 ft. 
.sunday night...north winds to 30 kt becoming northeast 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 2 ft. 
.tuesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 310819
glflm 
expires:202607311515;;379489

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
319 am cdt fri jul 31 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 30.0 inches will linger over lake michigan
through this morning, with low pressure over the central plains
deepening to 29.6 inches as it moves into eastern iowa this
evening. this will shift winds to easterly overnight tonight.
saturday, expect winds to shift to northeasterly as low pressure
moves into the ohio valley and deepens to 29.5 inches. gusts to 30
kt are expected saturday afternoon through sunday afternoon for
the southern two-thirds. an isolated gale is possible sunday
afternoon as low pressure lifts into michigan. a small craft
advisory is in effect for southern wisconsin nearshore zones from
late tonight into sunday night due to gusty winds and building
waves. low pressure will finally exit into sunday night with 
winds diminishing into monday. high pressure returns monday into 
tuesday, bringing light and variable winds. tuesday night into 
wednesday, southerly winds become dominant as a low pressure 
system develops in the plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-311515-
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-
319 am cdt fri jul 31 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 5 to 10 kt becoming south 10 to 15 kt,
then becoming southeast 10 to 20 kt late. waves 1 to 2 ft. 
.tonight...southeast winds 10 to 20 kt becoming east 15 to 25 kt.
chance of showers and slight chance of thunderstorms in the
evening, then showers and slight chance of thunderstorms
overnight. patchy smoke overnight. waves 2 to 4 ft building to
4 to 6 ft occasionally to 8 ft. 
.saturday...east winds 15 to 25 kt becoming northeast to 30 kt.
showers likely. waves 5 to 8 ft occasionally to 10 ft. 
.saturday night...northeast winds to 30 kt. chance of showers.
waves 6 to 9 ft occasionally to 12 ft. 
.sunday...north winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft. 
.sunday night...north winds to 30 kt becoming northeast 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.tuesday...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft.  

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378147

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz264-312000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt fri jul 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378148

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz265-312000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt fri jul 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378145

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz162-312000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri jul 31 2026 /300 am cdt fri jul 31 2026/

.early this morning...southwest winds 5 to 15 knots. patchy
smoke. a slight chance of showers and thunderstorms. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots backing southwest in the
afternoon. patchy smoke. a chance of showers and a slight chance
of thunderstorms. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering northeast late. patchy smoke through
midnight. a slight chance of showers through midnight. waves calm
to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...east winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378150

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz267-312000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt fri jul 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378149

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz266-312000-
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-
400 am edt fri jul 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202607312000;;378146

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jul 31 2026

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

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

.synopsis... 

a 29.7 inch low pressure moving over hudson bay early this morning 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low moves into 
quebec. a 30.0 inch high will build over james bay on saturday, 
extending a weak 29.9 inch ridge over the lake. ridging over the 
lake builds further to 30.0 inches on sunday, lingering into monday. 
a weak trough of 29.9 inches then moves through the area on tuesday 
followed by 30.0 inch ridging on wednesday.




lsz263-312000-
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-
400 am edt fri jul 31 2026

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

$$