fzus61 kbuf 310203
glflo 
expires:202607310900;;363929

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt thu jul 30 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 weak trough averaging 29.6 inches exits eastward while a ridge 
averaging 30.0 inches builds from the western great lakes through 
tonight. the ridge exits slowly eastward friday through saturday 
before a cold front sweeps eastward across lake ontario on sunday. 
in the wake of the front, a 30.0 inch high builds over the western 
great lakes builds southeast across the lower great lakes region 
for monday and tuesday.


loz062-310900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt thu jul 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 310203
glflo 
expires:202607310900;;363930

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt thu jul 30 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 weak trough averaging 29.6 inches exits eastward while a ridge 
averaging 30.0 inches builds from the western great lakes through 
tonight. the ridge exits slowly eastward friday through saturday 
before a cold front sweeps eastward across lake ontario on sunday. 
in the wake of the front, a 30.0 inch high builds over the western 
great lakes builds southeast across the lower great lakes region 
for monday and tuesday.


loz063>065-310900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt thu jul 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310128
glfle 
expires:202607310815;;363188

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt thu jul 30 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 through 
friday. low pressure 29.60 inches will enter from the west on 
saturday and slowly pass south of the lake through sunday. high 
pressure 30.00 inches will build back into the great lakes region 
on monday.


lez165>167-310815-
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-
928 pm edt thu jul 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310128
glfle 
expires:202607310815;;363189

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt thu jul 30 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 through 
friday. low pressure 29.60 inches will enter from the west on 
saturday and slowly pass south of the lake through sunday. high 
pressure 30.00 inches will build back into the great lakes region 
on monday.


lez061-168-169-310815-
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-
928 pm edt thu jul 30 2026

.overnight...west winds 10 knots or less. waves 1 foot or
less. 
.friday...southwest winds less than 10 knots becoming west. waves
1 foot or less. 
.friday night...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. waves 1 foot or less. 
.sunday...southeast winds 5 to 15 knots becoming northeast.
showers likely 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 becoming east. waves
2 feet or less. 
.tuesday...east winds 5 to 10 knots becoming south. waves 1 foot
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 310128
glfle 
expires:202607310815;;363187

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt thu jul 30 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 through 
friday. low pressure 29.60 inches will enter from the west on 
saturday and slowly pass south of the lake through sunday. high 
pressure 30.00 inches will build back into the great lakes region 
on monday.


lez162>164-310815-
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-
928 pm edt thu jul 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 310143
glfsc 
expires:202607310945;;363562

lake st clair forecast
national weather service detroit/pontiac mi
943 pm edt thu jul 30 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 into tomorrow. 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.


lcz460-310945-
lake st clair-
943 pm edt thu jul 30 2026

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

$$

fzus63 kdtx 310143
glflh 
expires:202607310945;;363557

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 pm edt thu jul 30 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 into tomorrow. 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.


lhz361-310945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
943 pm edt thu jul 30 2026

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


$$

fzus63 kdtx 310143
glflh 
expires:202607310945;;363558

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 pm edt thu jul 30 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 into tomorrow. 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.


lhz362-363-310945-
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-
943 pm edt thu jul 30 2026

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


$$

fzus63 kdtx 310143
glflh 
expires:202607310945;;363559

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 pm edt thu jul 30 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 into tomorrow. 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>464-310945-
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-
943 pm edt thu jul 30 2026

.rest of tonight...light and variable winds becoming south 5 to
10 knots early in the morning. waves 2 feet or less. 
.friday...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. 
.friday night...light and variable winds becoming northeast 5 to
10 knots in the late evening and overnight. a chance of showers
after midnight. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. showers likely. waves
2 feet or less. 
.saturday night...northeast 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 late in the morning...then decreasing to 10 to 15 knots
late in the evening. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northeast winds 5 to 10 knots. waves 1 to 3 feet. 
.tuesday...southeast winds 5 to 10 knots backing to the northeast
. waves 2 feet or less. 


$$

fzus63 kmkx 310211
glflm 
expires:202607310930;;364551

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
911 pm cdt thu jul 30 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 drift toward the lower 
great lakes through tonight, leading to light southerly winds. 
low pressure around 29.7 inches will track across iowa friday and 
through illinois saturday. the approaching area of low pressure 
will bring rain and a few thunderstorms friday into saturday. 
severe weather is not expected in any of this activity. breezy 
northeast winds will develop saturday and should continue through 
sunday as high pressure of 30.0 inches builds over lake superior. 
a few gusts upwards of 30 kt will be possible over the southern 
half of the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-310930-
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-
911 pm cdt thu jul 30 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 20 kt becoming southwest
10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 5 to 10 kt becoming southeast. slight
chance of showers in the afternoon. waves 1 to 2 ft. 
.friday night...east winds 10 to 15 kt increasing to 15 to 25 kt.
chance of showers in the evening, then showers likely overnight.
waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday...east winds to 30 kt becoming northeast. showers
likely. waves 4 to 7 ft occasionally to 9 ft. 
.saturday night...northeast winds to 30 kt. chance of showers in
the evening. waves 5 to 8 ft occasionally to 10 ft. 
.sunday...north winds to 30 kt. waves 7 to 10 ft occasionally to
13 ft. 
.sunday night...north winds to 30 kt becoming northeast 10 to
20 kt. waves 7 to 10 ft occasionally to 13 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...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 310211
glflm 
expires:202607310930;;364550

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
911 pm cdt thu jul 30 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 drift toward the lower 
great lakes through tonight, leading to light southerly winds. 
low pressure around 29.7 inches will track across iowa friday and 
through illinois saturday. the approaching area of low pressure 
will bring rain and a few thunderstorms friday into saturday. 
severe weather is not expected in any of this activity. breezy 
northeast winds will develop saturday and should continue through 
sunday as high pressure of 30.0 inches builds over lake superior. 
a few gusts upwards of 30 kt will be possible over the southern 
half of the lake.


lmz261-362-364-366-563-565-567-868-310930-
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-
911 pm cdt thu jul 30 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 10 to 20 kt diminishing to
10 to 15 kt. slight chance of showers. waves 1 to 3 ft. 
.friday...southwest winds 5 to 10 kt increasing to 10 to 15 kt.
chance of showers and slight chance of thunderstorms in the
morning, then slight chance of showers and thunderstorms in the
afternoon. waves 1 to 2 ft. 
.friday night...west winds 10 to 15 kt veering to northeast 10 to
20 kt. patchy smoke in the evening. chance of showers. waves 1 to
3 ft building to 2 to 4 ft. 
.saturday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. chance of showers. waves 2 to 4 ft. 
.saturday night...north winds 15 to 25 kt becoming northeast.
waves 3 to 5 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 6 ft occasionally to 8 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. waves 1 to 3 ft.  

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363867

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz162-310800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu jul 30 2026 /901 pm cdt thu jul 30 2026/

.rest of tonight...southwest winds 5 to 15 knots veering west
late. patchy smoke. a slight chance of showers and thunderstorms
after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon, then veering west late. a chance of showers and a
slight chance of thunderstorms. patchy smoke by mid afternoon.
waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke through midnight. a slight chance of showers through
midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. 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 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363868

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz263-310800-
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-
1001 pm edt thu jul 30 2026

.rest of tonight...southwest winds 5 to 15 knots veering west
late. patchy smoke. a slight chance of showers and thunderstorms.
waves 1 to 3 feet subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots. patchy smoke. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke. a slight chance of showers. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. 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 5 to 15 knots veering south 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 becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363869

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz264-310800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu jul 30 2026

.rest of tonight...southwest winds 5 to 15 knots veering west
late. patchy smoke. a slight chance of showers and thunderstorms.
waves 1 to 3 feet subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots. patchy smoke. a slight chance
of thunderstorms through early afternoon. a slight chance of
showers. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late. a
slight chance of showers through midnight. patchy smoke. waves
calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots backing north by mid
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...southeast winds less than 10 knots increasing to
5 to 15 knots 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 becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363870

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz265-310800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu jul 30 2026

.rest of tonight...south winds 10 to 20 knots veering west late.
patchy smoke. a slight chance of showers. a slight chance of
thunderstorms after midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots becoming south 5 to 15 knots
late. patchy smoke. a chance of showers. a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.saturday...north winds 10 to 20 knots. a slight chance of
showers. waves calm to 2 feet. 
.saturday night...north winds 10 to 20 knots. 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...southeast winds 5 to 15 knots veering south 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...south winds 10 to 20 knots veering west. a chance of
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363871

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz266-310800-
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-
1001 pm edt thu jul 30 2026

.rest of tonight...south winds 10 to 20 knots veering southwest
after midnight, then diminishing to 5 to 15 knots late. patchy
smoke. a slight chance of showers and thunderstorms after
midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots. patchy smoke. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke. a slight chance of thunderstorms through midnight.
a chance of showers. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. a slight chance of showers. waves calm
to 2 feet. 
.saturday night...north winds 10 to 20 knots veering northeast
after 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 10 to 20 knots veering south. 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 310201
glfls 
expires:202607310800;;363872

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz267-310800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu jul 30 2026

.rest of tonight...south winds 5 to 15 knots veering southwest
late. patchy smoke. a slight chance of showers and thunderstorms
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering west in the
afternoon. patchy smoke. a slight chance of showers. a slight
chance of thunderstorms by mid afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest late.
a chance of showers and a slight chance of thunderstorms. patchy
smoke after midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. a slight 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...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 backing west after
midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.tuesday...south winds 10 to 20 knots veering west. a chance of
showers. waves calm to 2 feet. 

$$