fzus61 kbuf 271402
glflo 
expires:202604272100;;613292

open lake forecast for lake ontario
national weather service buffalo ny
1002 am 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 weaken across the lower great 
lakes region today. a 29.4 inch low over the great plains tonight 
will advance northeast into the upper great lakes later 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.


loz062-272100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt mon apr 27 2026

.this afternoon...east winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...east winds 15 to 20 knots becoming southeast 10 to
15 knots. waves 2 to 4 feet. 
.tuesday...southeast winds 10 to 15 knots becoming south 15 to
20 knots. showers. waves 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming
northwest and diminishing to less than 10 knots overnight. a
chance of showers in the evening. waves 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest 15 to
20 knots. showers. waves 1 foot or less building to 2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots. a chance of rain
showers during the day. waves 2 to 4 feet building to 3 to
5 feet. 
.friday...northwest winds 15 to 20 knots. waves 3 to 6 feet. 

$$

fzus61 kbuf 271402
glflo 
expires:202604272100;;613293

open lake forecast for lake ontario
national weather service buffalo ny
1002 am 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 weaken across the lower great 
lakes region today. a 29.4 inch low over the great plains tonight 
will advance northeast into the upper great lakes later 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>065-272100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt mon apr 27 2026

.this afternoon...southeast winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.tonight...east winds 10 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 2 to 4 feet building to 3 to 5 feet. 
.tuesday night...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely in the evening, then a chance of showers
overnight. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 15 to
20 knots. showers. waves 2 feet or less building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots. rain showers likely
during the day, then a chance of rain showers thursday night.
waves 3 to 5 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.friday...northwest winds to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves 6 to 9 feet subsiding
to 4 to 7 feet. waves occasionally around 11 feet. 

$$

fzus61 kcle 271432
glfle 
expires:202604272015;;614550

open lake forecast for lake erie
national weather service cleveland oh
1032 am 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...
a ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.


lez165>167-272015-
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-
1032 am edt mon apr 27 2026

.this afternoon...east winds 10 to 15 knots. waves 1 to 2 feet. 
.tonight...southeast winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. showers likely with a slight chance
of thunderstorms after midnight. waves 1 to 3 feet building to
4 to 7 feet. waves occasionally around 9 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. a chance of showers. waves 3 to
6 feet subsiding to 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming northwest.
showers during the day. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.friday...north winds 10 to 15 knots. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271432
glfle 
expires:202604272015;;614551

open lake forecast for lake erie
national weather service cleveland oh
1032 am 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...
a ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.


lez061-168-169-272015-
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-
1032 am edt mon apr 27 2026

.this afternoon...east winds 5 to 15 knots. waves 1 foot or less. 
.tonight...east winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. a chance of showers with a slight
chance of thunderstorms after midnight. showers likely with a
slight chance of thunderstorms late. waves 1 to 3 feet building
to 4 to 7 feet. waves occasionally around 9 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. showers likely in the morning,
then a chance of showers in the afternoon. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 5 to 15 knots becoming north
less than 10 knots. waves 1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming northwest.
showers during the day, then a chance of showers wednesday night.
waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271432
glfle 
expires:202604272015;;614549

open lake forecast for lake erie
national weather service cleveland oh
1032 am 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...
a ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.


lez162>164-272015-
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-
1032 am edt mon apr 27 2026

.this afternoon...southeast winds 10 to 15 knots becoming east
15 to 20 knots. waves 1 to 3 feet. 
.tonight...southeast winds 15 to 20 knots becoming south. a
chance of showers with a slight chance of thunderstorms in the
evening, then showers with a slight chance of thunderstorms after
midnight. waves 1 to 3 feet building to 3 to 6 feet. 
.tuesday...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers in the
morning. 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 5 to 15 knots becoming north.
showers likely during the day. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.friday...north winds 10 to 15 knots. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 271346
glfsc 
expires:202604272200;;612718

lake st clair forecast
national weather service detroit/pontiac mi
946 am 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. brief southerly gales over the north half of
lake huron expected, along with showers and embedded
thunderstorms as the cold front passes through tuesday morning.


lcz460-272200-
lake st clair-
946 am edt mon apr 27 2026

...small craft advisory in effect from 8 pm edt this evening
through tuesday afternoon...

.rest of today...southeast winds 10 to 15 knots increasing to 15 to
20 knots in the afternoon. partly sunny. waves 1 to 3 feet.
.tonight...southeast winds 15 to 20 knots becoming south 20 to 25
knots with gusts to 30 knots. a chance of light showers late in 
the evening. light showers and a chance of thunderstorms after 
midnight. waves 1 to 3 feet building to 2 to 4 feet after 
midnight.
.tuesday...south winds 20 to 25 knots with gusts to 30 knots
becoming southwest 15 to 20 knots in the late morning and early
afternoon...then becoming west 10 to 15 knots early in the
afternoon. partly sunny. a chance of light showers until late
afternoon. 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 increasing to 15 to 20 knots
in the evening. mostly cloudy with a chance of light showers...then
partly cloudy in the evening. waves 2 feet or less.
.thursday...north winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.friday...north winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.

$$

fzus63 kdtx 271344
glflh 
expires:202604272145;;612711

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am 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 as the cold front passes through tuesday morning.


lhz361>363-272145-
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-
944 am edt mon apr 27 2026

.rest of today...east winds 10 to 15 knots becoming southeast
15 to 20 knots in the afternoon. waves 4 to 6 feet building to
6 to 9 feet late in the afternoon. waves occasionally around
12 feet. 
.tonight...southeast winds 15 to 20 knots increasing to 30 knots.
brief gusts to 35 knot gales. a chance of showers in the 
evening...then showers after midnight. waves 8 to 12 feet building
to 10 to 14 feet early in the morning. waves occasionally around 
18 feet. 
.tuesday...southeast winds 20 to 25 knots with brief gusts to 35 
knot gales becoming south 15 to 20 knots in the late morning and 
afternoon. a chance of showers in the morning. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.tuesday night...west winds 10 to 15 knots becoming northwest
5 to 10 knots in the late evening and overnight. waves 3 to
5 feet. 
.wednesday...northwest winds 5 to 10 knots becoming north 10 to
15 knots late in the morning...then backing to the northwest late
in the afternoon increasing to 15 to 20 knots late in the
evening. waves 1 to 3 feet building to 3 to 5 feet late in the
afternoon. 
.thursday...northwest winds 10 to 15 knots increasing to 15 to
20 knots by midnight. waves 3 to 5 feet. 
.friday...northwest winds 10 to 15 knots increasing to 15 to
20 knots . waves 3 to 5 feet building to 5 to 7 feet . waves
occasionally around 10 feet. 


$$

fzus63 kdtx 271344
glflh 
expires:202604272145;;612712

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am 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 as the cold front passes through tuesday morning.


lhz462>464-272145-
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-
944 am edt mon apr 27 2026

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


$$

fzus63 kmkx 271711
glflm 
expires:202604272115;;620398

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1211 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 of 29.5 inches over western iowa will move northeast
over lake superior by late tonight while deepening to 29.2 
inches. southeasterly winds will increase throughout today to gust
around 30 kt throughout the afternoon and early overnight hours. 
although the cooler lake temps should dampen the threat for 
widespread gales across the lake, thunderstorms during the 
afternoon and evening may produce multiple periods of gale force 
gusts in the southern half. trends will be monitored into the 
afternoon regarding the wind threat within the storms and 
regarding potential for gales outside of these storms. a cold
front passage will shift winds to the west early tuesday morning,
and remain gusty through tuesday afternoon.

high pressure around 30.1 inches will set up over the upper
midwest and upper great lakes tuesday through friday, producing
light and variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-272115-
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-
1211 pm cdt mon apr 27 2026

sheboygan wi to pentwater mi south...

...gale warning in effect until 7 pm cdt this evening...

.rest of today...southeast winds to 30 kt. chance of rain showers
and slight chance of thunderstorms. waves 6 to 9 ft occasionally
to 12 ft. 
.tonight...south winds to 30 kt veering to southwest 15 to 25 kt.
chance of rain showers and thunderstorms in the evening, then
chance of rain showers and slight chance of thunderstorms
overnight. waves 7 to 10 ft occasionally to 13 ft. 
.tuesday...west winds to 30 kt diminishing to 10 to 15 kt. waves
4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday night...northwest winds 10 to 15 kt becoming north.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday...north winds 10 to 20 kt. waves 1 to 3 ft building to
2 to 4 ft. 
.wednesday night...northwest winds 10 to 20 kt diminishing to
5 to 10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...northwest winds 10 to 15 kt becoming north. waves
1 to 2 ft. 
.friday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 271711
glflm 
expires:202604272115;;620397

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1211 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 of 29.5 inches over western iowa will move northeast
over lake superior by late tonight while deepening to 29.2 
inches. southeasterly winds will increase throughout today to gust
around 30 kt throughout the afternoon and early overnight hours. 
although the cooler lake temps should dampen the threat for 
widespread gales across the lake, thunderstorms during the 
afternoon and evening may produce multiple periods of gale force 
gusts in the southern half. trends will be monitored into the 
afternoon regarding the wind threat within the storms and 
regarding potential for gales outside of these storms. a cold
front passage will shift winds to the west early tuesday morning,
and remain gusty through tuesday afternoon.

high pressure around 30.1 inches will set up over the upper
midwest and upper great lakes tuesday through friday, producing
light and variable winds.


lmz261-362-364-366-563-565-567-868-272115-
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-
1211 pm cdt mon apr 27 2026

sheboygan wi to pentwater mi north...

.rest of today...southeast winds to 30 kt. chance of rain showers
and thunderstorms. waves 6 to 9 ft occasionally to 12 ft. 
.tonight...southeast winds to 30 kt becoming southwest. rain
showers likely with a chance of thunderstorms in the evening,
then chance of rain showers and slight chance of thunderstorms
overnight. waves 7 to 10 ft occasionally to 13 ft. 
.tuesday...southwest winds to 30 kt becoming west 10 to 20 kt.
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 5 to
10 kt overnight. waves 1 to 3 ft subsiding to 1 to 2 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. 
.friday...north winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613262

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz267-272000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt mon apr 27 2026

...gale warning in effect from 3 pm edt this afternoon through
tuesday afternoon...

.rest of today...southeast winds 20 to 30 knots increasing to
gales to 40 knots in the afternoon. a chance of rain showers by
mid afternoon. waves 3 to 5 feet occasionally to 7 feet building
to 6 to 9 feet occasionally to 11 feet. 
.tonight...southeast gales to 45 knots becoming south gales to
35 knots late. a slight chance of thunderstorms through midnight.
rain showers likely. waves building to 7 to 10 feet occasionally
to 13 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.tuesday...west gales to 40 knots. 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...northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.friday...northwest winds 15 to 25 knots veering north. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet. 

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613260

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz265-272000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt mon apr 27 2026

...gale warning in effect from 5 pm edt this afternoon through
tuesday afternoon...

.rest of today...southeast winds 20 to 30 knots increasing to
gales to 35 knots in the afternoon. a slight chance of rain
showers by late morning, then rain showers and a slight chance of
thunderstorms by mid afternoon. waves 2 to 4 feet building to
3 to 5 feet occasionally to 7 feet. 
.tonight...southeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then veering west late. rain showers and
a slight chance of thunderstorms through midnight, then a chance
of rain showers after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots
late. a slight chance of rain showers through early afternoon.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves 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 becoming northwest 5 to
15 knots. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613259

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz264-272000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt mon apr 27 2026

...gale warning in effect from 5 pm edt this afternoon through
tuesday afternoon...

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

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613258

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz263-272000-
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 am edt mon apr 27 2026

.rest of today...east winds 15 to 25 knots. a chance of rain
showers by late morning. a slight chance of thunderstorms. rain
showers by mid afternoon. waves 2 to 4 feet building to 3 to
6 feet occasionally to 8 feet. 
.tonight...southeast winds 15 to 25 knots becoming west 10 to
20 knots after midnight, then increasing to 20 to 30 knots late.
rain showers likely through midnight, then a chance of rain
showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a slight chance of rain showers
through early afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 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...west winds 5 to 15 knots backing southwest by mid
afternoon. 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 northwest. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613257

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon apr 27 2026 /901 am cdt mon apr 27 2026/

.rest of today...northeast winds 15 to 25 knots. rain showers and
a slight chance of thunderstorms. waves 3 to 6 feet occasionally
to 8 feet. 
.tonight...northeast winds 10 to 20 knots becoming west 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
a chance of rain showers. waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 
.friday...southeast winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 271402
glfls 
expires:202604272000;;613261

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 29.5 inch low over the central plains moves northeast today 
reaching the upper peninsula late this evening and crosses the lake 
at 29.4 inches by early tuesday morning. the low reaches james bay 
tuesday afternoon while 30.1 inch high pressure builds over the 
canadian prairie. as the low departs northeast, the high builds to 
30.2 inches while a 29.8 inch low passes south of the lower great 
lakes wednesday. by thursday night, the 30.2 inch high will span 
from hudson bay to the central plains while low pressure of 29.5 
inches will be off cape cod. the high then shifts directly over lake 
superior by saturday ahead of the arrival of a weak trough late 
saturday into sunday.



lsz266-272000-
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 am edt mon apr 27 2026

...gale warning in effect from 3 pm edt this afternoon through
tuesday afternoon...

.rest of today...southeast winds 20 to 30 knots increasing to
gales to 40 knots in the afternoon. a chance of rain showers and
a slight chance of thunderstorms by mid afternoon. waves 3 to
5 feet occasionally to 7 feet building to 6 to 9 feet
occasionally to 11 feet. 
.tonight...southeast gales to 45 knots becoming west gales to
35 knots late. rain showers and a slight chance of thunderstorms
through midnight, then a chance of rain showers after midnight.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest. waves
building to 1 to 3 feet. 
.friday...north winds 15 to 25 knots backing northwest. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 

$$