fzus61 kbuf 041402
glflo 
expires:202609042100;;891996

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri sep 4 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 30.1 inches builds gradually from 
northern ontario through monday. during monday night, a cold front 
will sweep southward across lake ontario. behind the front, another 
ridge averaging 30.1 inches builds from near james bay through 
tuesday. on wednesday, the ridge should exit southeastward and allow 
a warm front to sweep northeastward across lake ontario.


loz062-042100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt fri sep 4 2026

.this afternoon...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...west winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.saturday...northeast winds around 10 knots becoming light and
variable. waves 1 foot or less. 
.saturday night...light and variable winds becoming northeast
around 10 knots. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots becoming light and
variable. waves 2 feet or less. 
.monday...light and variable winds. waves 1 foot or less. 
.tuesday...northeast winds 5 to 15 knots becoming southeast. a
chance of showers tuesday night. waves 2 feet or less. 

$$

fzus61 kbuf 041402
glflo 
expires:202609042100;;891997

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri sep 4 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 30.1 inches builds gradually from 
northern ontario through monday. during monday night, a cold front 
will sweep southward across lake ontario. behind the front, another 
ridge averaging 30.1 inches builds from near james bay through 
tuesday. on wednesday, the ridge should exit southeastward and allow 
a warm front to sweep northeastward across lake ontario.


loz063>065-042100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt fri sep 4 2026

.this afternoon...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...west winds 5 to 10 knots becoming northeast. waves
2 feet or less. 
.saturday...north winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...north winds 5 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.sunday...northeast winds 5 to 15 knots diminishing to less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...northwest winds 10 knots or less. waves 1 foot or less.
.tuesday...northeast winds 5 to 15 knots becoming southeast.
waves 1 foot or less. 

$$

fzus61 kcle 041408
glfle 
expires:202609042015;;892360

open lake forecast for lake erie
national weather service cleveland oh
1008 am edt fri sep 4 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...
a frontal boundary located near lake erie will work its way to 
the south tonight and into the ohio valley through saturday with
pressure averaging 29.90 inches. a ridge averaging 30.00 inches 
will build from the great lakes into northern ohio this weekend 
and into early next week.


lez162-163-042015-
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-
1008 am edt fri sep 4 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 041408
glfle 
expires:202609042015;;892361

open lake forecast for lake erie
national weather service cleveland oh
1008 am edt fri sep 4 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...
a frontal boundary located near lake erie will work its way to 
the south tonight and into the ohio valley through saturday with
pressure averaging 29.90 inches. a ridge averaging 30.00 inches 
will build from the great lakes into northern ohio this weekend 
and into early next week.


lez164>167-042015-
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-
1008 am edt fri sep 4 2026

.this afternoon...west winds 10 knots or less. showers and
thunderstorms, then a chance of showers with a slight chance of
thunderstorms late. waves 1 foot or less. 
.tonight...northwest winds 10 knots or less becoming northeast. a
slight chance of showers and thunderstorms early, then a chance
of showers and thunderstorms from late evening on. waves 1 foot
or less. 
.saturday...northeast winds 5 to 15 knots. a chance of showers in
the morning. waves 1 to 3 feet. 
.saturday night...northeast winds 10 to 15 knots becoming east.
waves 2 to 3 feet. 
.sunday...northeast winds 15 to 20 knots becoming east 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.monday...east winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming south. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 041408
glfle 
expires:202609042015;;892362

open lake forecast for lake erie
national weather service cleveland oh
1008 am edt fri sep 4 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...
a frontal boundary located near lake erie will work its way to 
the south tonight and into the ohio valley through saturday with
pressure averaging 29.90 inches. a ridge averaging 30.00 inches 
will build from the great lakes into northern ohio this weekend 
and into early next week.


lez061-168-169-042015-
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-
1008 am edt fri sep 4 2026

.this afternoon...northwest winds less than 10 knots becoming
west. a chance of showers and thunderstorms, then a slight chance
of showers and thunderstorms late. waves 1 foot or less. 
.tonight...northwest winds 10 knots or less becoming northeast. a
slight chance of showers and thunderstorms in the evening. waves
1 foot or less. 
.saturday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...northeast winds 5 to 15 knots. waves 1 to
3 feet. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.monday...east winds 10 knots or less. waves 1 foot or less. 
.tuesday...east winds 5 to 15 knots becoming south. a chance of
showers tuesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 041337
glfsc 
expires:202609042200;;891292

lake st clair forecast
national weather service detroit/pontiac mi
937 am edt fri sep 4 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...a stalled frontal boundary remains draped across the
southern and western great lakes today. additional rounds of
storms follow along and north of the front today until the front
dislodges southward tonight. dry weather is then forecast for
saturday and sunday.


lcz460-042200-
lake st clair-
937 am edt fri sep 4 2026

.rest of today...light and variable winds. showers late in the 
morning. a chance of light showers early in the afternoon. waves 
nearly calm.
.tonight...northeast winds 5 to 10 knots. partly cloudy. a chance of
thunderstorms by midnight. a chance of light showers in the late
evening and overnight. waves 2 feet or less.
.saturday...northeast winds 5 to 10 knots increasing to 10 to 15
knots early in the afternoon. partly sunny. waves 2 feet or less.
.saturday night...northeast winds 15 to 20 knots diminishing to 5 to
10 knots. partly cloudy early in the evening then clearing. waves 2
feet or less.
.sunday...northeast winds 5 to 10 knots. sunny becoming mostly
clear. waves 2 feet or less.
.monday...east winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.tuesday...southeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 041336
glflh 
expires:202609042200;;891287

open lake forecast for lake huron
national weather service detroit/pontiac mi
936 am edt fri sep 4 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...a stalled frontal boundary remains draped across the
southern and western great lakes today. additional rounds of
storms follow along and north of the front today until the front
dislodges southward tonight. dry weather is then forecast for
saturday and sunday.


lhz361-362-042200-
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-
936 am edt fri sep 4 2026

.rest of today...east winds 5 to 10 knots late in the morning
becoming light and variable. patchy fog late in the morning.
waves 2 feet or less. 
.tonight...light and variable winds becoming northeast 5 to
10 knots early in the morning. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 feet or less. 
.saturday night...light and variable winds. waves 2 feet or less.
.sunday...light and variable winds. waves 2 feet or less. 
.monday...light and variable winds becoming east 5 to 10 knots by
midnight. waves 2 feet or less. 
.tuesday...southeast winds 10 to 15 knots increasing to 15 to
20 knots by midnight. a chance of showers. waves 1 to 3 feet
building to 2 to 4 feet . 


$$

fzus63 kdtx 041336
glflh 
expires:202609042200;;891289

open lake forecast for lake huron
national weather service detroit/pontiac mi
936 am edt fri sep 4 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...a stalled frontal boundary remains draped across the
southern and western great lakes today. additional rounds of
storms follow along and north of the front today until the front
dislodges southward tonight. dry weather is then forecast for
saturday and sunday.


lhz463-464-042200-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
936 am edt fri sep 4 2026

.rest of today...light and variable winds becoming northeast 5 to
10 knots late in the afternoon. a chance of showers. waves 2 feet
or less. 
.tonight...northeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots becoming north 10 to
15 knots early in the afternoon. waves 2 feet or less. 
.saturday night...north winds 10 to 15 knots becoming northeast
5 to 10 knots after midnight. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.monday...southeast winds 5 to 10 knots early in the morning
becoming light and variable...then becoming east 5 to 10 knots by
midnight. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots increasing to 10 to
15 knots . a chance of showers by midnight. waves 1 to 3 feet
building to 2 to 4 feet by midnight. 


$$

fzus63 kdtx 041336
glflh 
expires:202609042200;;891288

open lake forecast for lake huron
national weather service detroit/pontiac mi
936 am edt fri sep 4 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...a stalled frontal boundary remains draped across the
southern and western great lakes today. additional rounds of
storms follow along and north of the front today until the front
dislodges southward tonight. dry weather is then forecast for
saturday and sunday.


lhz363-462-042200-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
936 am edt fri sep 4 2026

.rest of today...light and variable winds. waves 2 feet or less. 
.tonight...northeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...northeast winds 5 to 10 knots. waves 2 feet or
less. 
.sunday...northeast winds 5 to 10 knots in the morning becoming
light and variable. waves 2 feet or less. 
.monday...light and variable winds becoming east 5 to 10 knots by
midnight. waves 2 feet or less. 
.tuesday...east winds 5 to 10 knots becoming southeast 10 to
15 knots . a chance of showers...then showers likely by midnight.
waves 1 to 3 feet building to 2 to 4 feet by midnight. 


$$

fzus63 kmkx 041414
glflm 
expires:202609042115;;892883

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
914 am cdt fri sep 4 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...

light and variable winds with periods of showers and thunderstorms
expected through this morning as a frontal boundary remains
stalled across the lake. 

high pressure around 30.1 inches builds into the great lakes
region from the north this weekend, leading to light northeast to
east winds and predominantly dry weather. shower and storm 
chances return to the forecast midweek next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-042115-
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-
914 am cdt fri sep 4 2026

sheboygan wi to pentwater mi south...

.rest of today...southeast winds 10 to 15 kt becoming south.
scattered showers with isolated thunderstorms late this morning.
waves 1 to 2 ft. 
.tonight...southeast winds 5 to 10 kt backing to northeast.
scattered showers and thunderstorms in the evening, then slight
chance of showers and thunderstorms overnight. patchy fog
overnight. waves 1 to 2 ft. 
.saturday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. patchy fog in the morning. waves 1 to 3 ft. 
.saturday night...northeast winds 10 to 20 kt becoming east.
waves 2 to 4 ft. 
.sunday...east winds 10 to 15 kt becoming northeast. waves 2 to
4 ft. 
.sunday night...northeast winds 10 to 15 kt becoming southeast.
waves 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt. waves 1 to 3 ft. 
.tuesday...southeast winds 15 to 25 kt becoming south to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft building
to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 041414
glflm 
expires:202609042115;;892882

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
914 am cdt fri sep 4 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...

light and variable winds with periods of showers and thunderstorms
expected through this morning as a frontal boundary remains
stalled across the lake. 

high pressure around 30.1 inches builds into the great lakes
region from the north this weekend, leading to light northeast to
east winds and predominantly dry weather. shower and storm 
chances return to the forecast midweek next week.


lmz261-362-364-366-563-565-567-868-042115-
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-
914 am cdt fri sep 4 2026

sheboygan wi to pentwater mi north...

.rest of today...southeast winds 10 to 20 kt becoming east.
scattered showers late this morning. waves 1 to 2 ft. 
.tonight...east winds 10 to 20 kt diminishing to 5 to 10 kt.
patchy fog overnight. waves 1 to 2 ft. 
.saturday...east winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 2 ft. 
.saturday night...northeast winds 10 to 20 kt becoming east 10 to
15 kt. waves 1 to 2 ft. 
.sunday...southeast winds 5 to 10 kt becoming east 10 to 15 kt.
waves 1 to 2 ft. 
.sunday night...east winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.monday...south winds 10 to 15 kt. waves 1 to 2 ft. 
.tuesday...south winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft building
to 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891947

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz162-042000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt fri sep 4 2026 /900 am cdt fri sep 4 2026/

.rest of today...northeast winds 15 to 25 knots. a chance of
showers. waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.monday...east gales to 40 knots. a chance of showers. showers.
waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...south gales to 35 knots becoming west 20 to 30 knots.
showers likely. a chance of showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891948

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz263-042000-
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-
1000 am edt fri sep 4 2026

.rest of today...east winds 10 to 20 knots backing northeast
late. a chance of showers. waves 2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a slight chance of showers through
midnight. waves subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.monday...east gales to 35 knots. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...south gales to 40 knots. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet. 

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891949

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz264-042000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt fri sep 4 2026

.rest of today...east winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet building to 1 to 3 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering east late. waves subsiding
to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...southeast winds less than 10 knots. waves calm to
2 feet. 
.sunday night...southeast winds 5 to 15 knots backing east after
midnight. waves calm to 2 feet. 
.monday...east winds 15 to 25 knots increasing to gales to
35 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...south gales to 45 knots. showers, then a chance of
showers. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891950

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz265-042000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt fri sep 4 2026

.rest of today...east winds 10 to 20 knots increasing to 15 to
25 knots late. a slight chance of showers. waves 1 to 3 feet
building to 2 to 4 feet. 
.tonight...east winds 10 to 20 knots diminishing to 5 to 15 knots
late. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.monday...east winds 15 to 25 knots becoming southeast gales to
35 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...south gales to 45 knots. showers, then a chance of
showers. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891951

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz266-042000-
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-
1000 am edt fri sep 4 2026

.rest of today...east winds 10 to 20 knots. a slight chance of
showers. waves calm to 2 feet building to 1 to 3 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast late.
waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves calm to 2 feet. 
.monday...east winds 15 to 25 knots becoming southeast gales to
35 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...south gales to 40 knots. showers. waves building to
8 to 11 feet occasionally to 14 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 041401
glfls 
expires:202609042000;;891952

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast quebec shifts east towards nova scotia and deepens to 
29.5 inches. ridging builds to 30.2 inches over the lake by early 
next week as high pressure over hudson bay strengthens to 30.4 
inches. broad troughing of 29.5 to 29.6 inches will persist over the 
rockies and northern plains through the period.




lsz267-042000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt fri sep 4 2026

.rest of today...east winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. waves
calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing north late. waves
calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots becoming southeast 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...southeast winds 20 to 30 knots becoming south gales to
35 knots. showers likely. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$