fzus61 kbuf 280202
glflo 
expires:202604280900;;643728

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt mon apr 27 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 30.3 inch high will ridge along the eastern seaboard 
overnight. a 29.4 inch low over the great plains will advance 
northeast into the upper great lakes late tonight into tuesday 
morning, while pushing a warm front across the lake. the low will 
head northeast to james bay tuesday night sending a cold front 
across the lake. an inverted trough averaging 29.7 inch inverted 
trough is expected across the lower great lakes wednesday through 
wednesday night. the trough/low will track to the coast of new 
england through friday while also deepening to 29.5 inches.


loz063>065-280900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt mon apr 27 2026

.overnight...southeast winds 10 to 15 knots increasing to
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...southeast winds 15 to 20 knots. showers likely from
late morning on. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tuesday night...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. waves 3 to 5 feet subsiding to
1 to 3 feet. 
.wednesday...west winds 5 to 10 knots becoming northeast. a
chance of showers in the morning, then showers in the afternoon.
waves 2 feet or less. 
.wednesday night...northeast winds 5 to 15 knots becoming west
15 to 20 knots. showers. waves 1 to 3 feet building to 2 to
4 feet. 
.thursday...west winds 15 to 25 knots becoming northwest. rain
showers likely during the day. waves 3 to 6 feet. 
.friday...west winds 15 to 25 knots. waves 3 to 6 feet subsiding
to 2 to 4 feet. 
.saturday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 280202
glflo 
expires:202604280900;;643727

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt mon apr 27 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 30.3 inch high will ridge along the eastern seaboard 
overnight. a 29.4 inch low over the great plains will advance 
northeast into the upper great lakes late tonight into tuesday 
morning, while pushing a warm front across the lake. the low will 
head northeast to james bay tuesday night sending a cold front 
across the lake. an inverted trough averaging 29.7 inch inverted 
trough is expected across the lower great lakes wednesday through 
wednesday night. the trough/low will track to the coast of new 
england through friday while also deepening to 29.5 inches.


loz062-280900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt mon apr 27 2026

.overnight...southeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south. showers
through early afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.tuesday night...south winds 15 to 20 knots becoming northwest
5 to 15 knots. waves 1 to 3 feet. 
.wednesday...north winds 10 knots or less. a chance of showers in
the morning, then showers in the afternoon. waves 1 foot or less.
.wednesday night...north winds 10 to 15 knots becoming northwest.
showers. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of rain showers during the day. waves 2 to
4 feet. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 1 to 3 feet. 
.saturday...west winds 10 to 15 knots. waves 2 to 3 feet. 

$$

fzus61 kcle 280130
glfle 
expires:202604280815;;642708

open lake forecast for lake erie
national weather service cleveland oh
930 pm edt mon apr 27 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...
low pressure 29.40 inches tracks through the northern great lakes
tonight, lifting a warm front across lake erie this evening
quickly followed by a cold front during the day tuesday. low
pressure 29.90 inches moves through the ohio valley wednesday,
before moving into new england and deepening to 29.60 inches 
thursday and friday as a trough lingers over the great lakes.


lez061-168-169-280815-
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-
930 pm edt mon apr 27 2026

.rest of tonight...southeast winds 15 to 25 knots becoming south.
a chance of showers with a slight chance of thunderstorms after
midnight. showers with a slight chance of thunderstorms late.
waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. showers with a slight chance of
thunderstorms early, then a slight chance of showers and
thunderstorms from late morning on. waves 3 to 6 feet subsiding
to 1 to 3 feet. 
.tuesday night...southwest winds 10 knots or less becoming north.
waves 1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming north 15 to
20 knots. showers. waves 1 to 3 feet. 
.wednesday night...northwest winds 10 to 15 knots. rain showers
in the evening. waves 1 to 3 feet. 
.thursday...northwest winds 5 to 15 knots. waves 1 to 3 feet. 
.friday...northwest winds 5 to 15 knots. waves 1 to 2 feet. 
.saturday...northwest winds 5 to 15 knots becoming west. waves
1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 280130
glfle 
expires:202604280815;;642706

open lake forecast for lake erie
national weather service cleveland oh
930 pm edt mon apr 27 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...
low pressure 29.40 inches tracks through the northern great lakes
tonight, lifting a warm front across lake erie this evening
quickly followed by a cold front during the day tuesday. low
pressure 29.90 inches moves through the ohio valley wednesday,
before moving into new england and deepening to 29.60 inches 
thursday and friday as a trough lingers over the great lakes.


lez162>164-280815-
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-
930 pm edt mon apr 27 2026

.rest of tonight...southeast winds 15 to 25 knots becoming south.
showers with a slight chance of thunderstorms, then a chance of
showers with a slight chance of thunderstorms late. waves 2 to
4 feet building to 3 to 5 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. a slight chance of showers and thunderstorms through
early afternoon. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday night...west winds 5 to 10 knots becoming north. a
chance of showers overnight. waves 2 feet or less. 
.wednesday...northeast winds 10 to 15 knots becoming north.
showers likely in the morning, then a chance of showers in the
afternoon. waves 1 to 3 feet. 
.wednesday night...north winds 10 to 15 knots becoming northwest.
a chance of showers in the evening. waves 1 to 3 feet. 
.thursday...northwest winds around 10 knots. waves 1 to 2 feet. 
.friday...northwest winds 10 to 15 knots becoming north. waves
around 1 foot. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 280130
glfle 
expires:202604280815;;642707

open lake forecast for lake erie
national weather service cleveland oh
930 pm edt mon apr 27 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...
low pressure 29.40 inches tracks through the northern great lakes
tonight, lifting a warm front across lake erie this evening
quickly followed by a cold front during the day tuesday. low
pressure 29.90 inches moves through the ohio valley wednesday,
before moving into new england and deepening to 29.60 inches 
thursday and friday as a trough lingers over the great lakes.


lez165>167-280815-
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-
930 pm edt mon apr 27 2026

.rest of tonight...southeast winds 15 to 25 knots becoming south.
a chance of showers with a slight chance of thunderstorms late
this evening, then showers with a slight chance of thunderstorms
after midnight. waves 2 to 4 feet building to 3 to 6 feet. 
.tuesday...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a slight chance of showers and
thunderstorms. waves 3 to 6 feet subsiding to 2 to 3 feet. 
.tuesday night...west winds 5 to 10 knots becoming north. waves
1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming north.
showers. waves 1 to 3 feet. 
.wednesday night...north winds 15 to 20 knots becoming northwest
10 to 15 knots. a chance of showers in the evening. waves 2 to
4 feet. 
.thursday...northwest winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.friday...northwest winds around 10 knots becoming north. waves
around 1 foot. 
.saturday...north winds 10 to 15 knots becoming west. waves 1 to
2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 280159
glfsc 
expires:202604281000;;643536

lake st clair forecast
national weather service detroit/pontiac mi
959 pm edt mon apr 27 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...the next low, 29.30 inches, will track through lake
superior tonight with showers and embedded thunderstorms. the 
cold front passes through on tuesday.


lcz460-281000-
lake st clair-
959 pm edt mon apr 27 2026

...small craft advisory in effect through tuesday afternoon...

.rest of tonight...south winds 15 to 20 knots with gusts to 30 knots
increasing to 20 to 25 knots after midnight. light showers by
midnight...then light showers and scattered thunderstorms early in
the morning. waves 2 to 4 feet.
.tuesday...south winds 20 to 25 knots becoming southwest 15 to 20
knots in the late morning and early afternoon...then becoming west
10 to 15 knots late in the afternoon. cloudy early in the morning
becoming partly sunny. numerous light showers early in the morning.
waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and
afternoon.
.tuesday night...west winds 10 to 15 knots becoming north 5 to 10
knots in the late evening and overnight. partly cloudy becoming
mostly cloudy. waves 2 feet or less.
.wednesday...north winds 10 to 15 knots. mostly cloudy. light
showers likely in the late morning and early afternoon. a chance of
light showers early in the afternoon. waves 2 feet or less.
.wednesday night...north winds 10 to 15 knots becoming northwest 5
to 10 knots after midnight. partly cloudy until early morning then
clearing. a chance of light showers early in the evening. waves 2
feet or less.
.thursday...northwest winds 10 to 15 knots becoming north 5 to 10
knots in the evening. sunny in the morning becoming partly cloudy.
waves 2 feet or less.
.friday...north winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.
.saturday...northwest winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 280158
glflh 
expires:202604281000;;643490

open lake forecast for lake huron
national weather service detroit/pontiac mi
958 pm edt mon apr 27 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...the next low, 29.30 inches, will track through lake
superior tonight. brief southerly gales over the north half of
lake huron expected, along with showers and embedded
thunderstorms before the cold front passes through on tuesday.


lhz361>363-281000-
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-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
958 pm edt mon apr 27 2026

...gale warning in effect from 1 am to 8 am edt tuesday...

.rest of tonight...southeast winds 20 to 25 knots increasing to
30 knots after midnight. gusts to 35 knot gales. showers. waves
8 to 12 feet building to 12 to 16 feet early in the morning.
waves occasionally around 20 feet. 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
becoming southwest 15 to 20 knots in the afternoon. scattered
showers in the morning. waves 10 to 14 feet subsiding to 6 to
9 feet late in the afternoon. waves occasionally around 18 feet. 
.tuesday night...southwest winds 10 to 15 knots becoming
northwest 5 to 10 knots in the late evening and overnight. waves
4 to 6 feet subsiding to 2 to 4 feet after midnight. waves
occasionally around 8 feet. 
.wednesday...northwest winds 5 to 10 knots becoming 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.wednesday night...northwest winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. waves 2 to
4 feet. 
.thursday...northwest winds 10 to 15 knots. waves 3 to 5 feet. 
.friday...northwest winds 10 to 15 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.saturday...northwest winds 10 to 15 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 


$$

fzus63 kdtx 280158
glflh 
expires:202604281000;;643491

open lake forecast for lake huron
national weather service detroit/pontiac mi
958 pm edt mon apr 27 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...the next low, 29.30 inches, will track through lake
superior tonight. brief southerly gales over the north half of
lake huron expected, along with showers and embedded
thunderstorms before the cold front passes through on tuesday.


lhz462>464-281000-
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-
958 pm edt mon apr 27 2026

.rest of tonight...southeast winds 20 to 25 knots increasing to
30 knots early in the morning. showers. waves 6 to 9 feet. waves 
occasionally around 12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and early afternoon...then becoming
southwest 10 to 15 knots late in the afternoon. a chance of
showers in the morning. waves 6 to 9 feet subsiding to 4 to
6 feet late in the afternoon. waves occasionally around 12 feet. 
.tuesday night...west winds 5 to 10 knots veering to the north
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.wednesday...north winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and afternoon. a chance of showers
in the morning. waves 1 to 3 feet building to 2 to 4 feet early
in the afternoon. 
.wednesday night...north winds 10 to 15 knots becoming northwest
15 to 20 knots after midnight. waves 3 to 5 feet. 
.thursday...northwest winds 10 to 15 knots becoming north 5 to
10 knots late in the afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet late in the afternoon...then building to 3 to 5 feet
late in the evening. 
.friday...northwest winds 10 to 15 knots becoming north 5 to
10 knots early in the evening...then backing to the northwest by
midnight. waves 3 to 5 feet. 
.saturday...northwest winds 10 to 15 knots becoming west by
midnight. waves 3 to 5 feet subsiding to 2 to 4 feet by midnight.


$$

fzus63 kmkx 280144
glflm 
expires:202604280915;;643152

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt mon apr 27 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...

low pressure around 29.3 inches will gradually move northeast
across lake superior overnight. gusty south to southeast winds 
will become southwest overnight and west on tuesday, as a cold 
front moves through.

scattered thunderstorms will also move east across portions of 
the lake into the overnight hours, which may bring some gusty 
winds. some fog may occur as well, until the gusty southwest to 
west winds develop overnight into tuesday.

high pressure around 30.1 inches will set up over the upper 
midwest wednesday through friday. this should bring gradually
lighter winds to lake michigan. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-280915-
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-
844 pm cdt mon apr 27 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds to 30 kt becoming southwest after
midnight, then diminishing to 15 to 25 kt late. patchy fog. rain
showers and scattered thunderstorms through early evening, then
scattered rain showers and thunderstorms overnight. waves 7 to
10 ft occasionally to 13 ft. 
.tuesday...west winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday night...west winds 10 to 15 kt veering to north 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday night...northwest winds 10 to 20 kt diminishing to
5 to 10 kt overnight. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...northwest winds 10 to 15 kt becoming north. waves
1 to 2 ft. 
.thursday night...north winds 10 to 15 kt. waves 1 to 2 ft. 
.friday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 280144
glflm 
expires:202604280915;;643151

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt mon apr 27 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...

low pressure around 29.3 inches will gradually move northeast
across lake superior overnight. gusty south to southeast winds 
will become southwest overnight and west on tuesday, as a cold 
front moves through.

scattered thunderstorms will also move east across portions of 
the lake into the overnight hours, which may bring some gusty 
winds. some fog may occur as well, until the gusty southwest to 
west winds develop overnight into tuesday.

high pressure around 30.1 inches will set up over the upper 
midwest wednesday through friday. this should bring gradually
lighter winds to lake michigan. 


lmz261-362-364-366-563-565-567-868-280915-
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-
844 pm cdt mon apr 27 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southeast winds to 30 kt becoming southwest
15 to 25 kt. patchy fog. scattered rain showers and thunderstorms
through early evening, then scattered rain showers with isolated
thunderstorms overnight. waves 7 to 10 ft occasionally to 13 ft. 
.tuesday...southwest winds to 30 kt becoming west 15 to 25 kt.
isolated rain showers in the morning. waves 5 to 8 ft
occasionally to 10 ft subsiding to 3 to 5 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming north 10 to
15 kt late in the evening, then diminishing to 5 to 10 kt after
midnight becoming north 5 to 10 kt late. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.wednesday...north winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 1 to 3 ft. 
.wednesday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.thursday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.friday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.saturday...northwest winds 10 to 20 kt becoming west. waves 1 to
3 ft.  

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643845

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1004 pm edt mon apr 27 2026 /904 pm cdt mon apr 27 2026/

.rest of tonight...northwest winds 15 to 25 knots backing west
after midnight, then increasing to 20 to 30 knots late. rain
showers likely. waves 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.saturday...south winds 5 to 15 knots veering west. waves calm to
2 feet. 

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643846

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz263-280800-
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-
1004 pm edt mon apr 27 2026

...gale warning in effect from 5 am edt tuesday through tuesday
afternoon...

.rest of tonight...southeast winds 15 to 25 knots veering west
after midnight, then increasing to 20 to 30 knots late. a chance
of rain showers. waves 5 to 9 feet occasionally to 11 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west gales to 35 knots diminishing to 15 to 25 knots
late. a slight chance of rain showers through early afternoon.
waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds less than 10 knots increasing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds less than 10 knots becoming
north 5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.saturday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643847

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz264-280800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1004 pm edt mon apr 27 2026

...gale warning in effect through tuesday afternoon...

.rest of tonight...southeast gales to 35 knots diminishing to
20 to 30 knots after midnight, then veering west late. patchy fog
by midnight. areas of dense fog after midnight. a chance of rain
showers. waves 8 to 11 feet occasionally to 14 feet subsiding to
5 to 8 feet occasionally to 10 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots
late. patchy fog through early afternoon. a slight chance of rain
showers through early afternoon. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643848

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz265-280800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1004 pm edt mon apr 27 2026

...gale warning in effect through tuesday afternoon...

.rest of tonight...southeast winds 20 to 30 knots becoming west
gales to 35 knots late. areas of fog. a chance of rain showers.
waves 6 to 9 feet occasionally to 11 feet subsiding to 4 to
7 feet occasionally to 9 feet. 
.tuesday...west gales to 40 knots. patchy fog through early
afternoon. a slight chance of rain showers through early
afternoon. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...west winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.wednesday...northwest winds 10 to 20 knots veering north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots. waves building
to 1 to 3 feet. 
.friday...north winds 10 to 20 knots backing northwest. waves
building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots backing west. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643849

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz266-280800-
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-
1004 pm edt mon apr 27 2026

...gale warning in effect through tuesday afternoon...

.rest of tonight...southeast gales to 40 knots becoming southwest
gales to 35 knots late. patchy dense fog. a chance of rain
showers. waves 9 to 12 feet occasionally to 15 feet subsiding to
6 to 9 feet occasionally to 11 feet. 
.tuesday...west gales to 40 knots. patchy fog through early
afternoon. a slight chance of rain showers through early
afternoon. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 8 to 11 feet occasionally to 14 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest by mid
afternoon. waves building to 1 to 3 feet. 
.thursday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.friday...north winds 10 to 20 knots backing northwest. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 

$$

fzus63 kmqt 280204 cca
glfls 
expires:202604280800;;643850

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt mon apr 27 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 29.4 inch low over the u.p. lifts into lake superior tonight as it 
deepens to 29.3 inches. the low exits the lake and reaches james bay 
tuesday afternoon while 30.1 inch high pressure continues over the 
canadian prairie. as the low continues departing to the northeast, 
the high builds to 30.2 inches while a 29.8 inch low expands over 
the eastern seaboard on wednesday. by thursday night, the 30.2 inch 
high spans from hudson bay to the central plains while the low 
pressure of now 29.6 inches is just off cape cod. high pressure 
ridging over lake superior reaches its zenith of 30.2 inches by 
saturday, before a weak trough of around 29.8 inches passes through 
the lake saturday night into sunday.



lsz267-280800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1004 pm edt mon apr 27 2026

...gale warning in effect through tuesday afternoon...

.rest of tonight...southeast gales to 45 knots becoming south
gales to 35 knots late. a chance of rain showers and a slight
chance of thunderstorms. waves 8 to 11 feet occasionally to
14 feet subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west gales to 40 knots. patchy fog through early
afternoon. a chance of rain showers through early afternoon.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet. 
.tuesday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots veering north. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.saturday...northwest winds 10 to 20 knots. waves building to
2 to 4 feet, then subsiding to calm to 2 feet. 

$$