fzus61 kbuf 230209
glflo 
expires:202604230900;;828112

open lake forecast for lake ontario
national weather service buffalo ny
1008 pm edt wed apr 22 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 30.0 inch high will build across the great lakes 
tonight and tomorrow. a warm front will approach the lake friday, 
this from a 29.6 inch area of low pressure that will advance across 
the great lakes region, though remaining south of the lake. this low 
will move towards delmarva saturday. a 30.2 inch area of high 
pressure will build across the lower great lakes saturday night and 
sunday. a 29.4 inch area of low pressure will advance from the 
central plains sunday night to the western great lakes monday night.


loz062-230900-
lake ontario open waters from the niagara river to hamlin beach-
1008 pm edt wed apr 22 2026

.overnight...northwest winds less than 10 knots becoming
west. waves 1 foot or less. 
.thursday...north winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.thursday night...southeast winds 10 knots or less becoming east
10 to 15 knots. waves 2 feet or less. 
.friday...east winds 15 to 20 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.friday night...east winds 15 to 20 knots. a chance of showers
overnight. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming northeast and
diminishing to around 10 knots. showers likely during the day,
then a chance of showers saturday night. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.sunday...north winds 10 knots or less becoming east. waves
2 feet or less. 
.monday...east winds 5 to 15 knots becoming southeast 15 to
20 knots. a chance of showers monday night. waves 1 foot or less
building to 2 to 4 feet. 

$$

fzus61 kbuf 230209
glflo 
expires:202604230900;;828113

open lake forecast for lake ontario
national weather service buffalo ny
1008 pm edt wed apr 22 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 30.0 inch high will build across the great lakes 
tonight and tomorrow. a warm front will approach the lake friday, 
this from a 29.6 inch area of low pressure that will advance across 
the great lakes region, though remaining south of the lake. this low 
will move towards delmarva saturday. a 30.2 inch area of high 
pressure will build across the lower great lakes saturday night and 
sunday. a 29.4 inch area of low pressure will advance from the 
central plains sunday night to the western great lakes monday night.


loz063>065-230900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1008 pm edt wed apr 22 2026

.overnight...southwest winds 10 knots or less becoming
northwest. waves 1 foot or less. 
.thursday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.thursday night...southwest winds 10 knots or less becoming
northeast 10 to 15 knots. waves 2 feet or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...northeast winds 5 to 15 knots becoming east. a
chance of showers overnight. waves 1 to 3 feet. 
.saturday...east winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.sunday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.monday...east winds 5 to 15 knots becoming southeast 15 to
20 knots. a chance of showers monday night. waves 1 to 3 feet
building to 2 to 4 feet. 

$$

fzus61 kcle 230244
glfle 
expires:202604230815;;829145

open lake forecast for lake erie
national weather service cleveland oh
1044 pm edt wed apr 22 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 stationary front will persist south of lake erie into friday.
low pressure 29.60 inches will move east through the central great
lakes friday night into saturday, followed by high pressure 
30.10 inches on sunday. another low pressure system 29.50 inches 
will move northeast into the upper midwest on monday.


lez061-168-169-230815-
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-
1044 pm edt wed apr 22 2026

.rest of tonight...west winds less than 10 knots becoming
northeast. waves 1 foot or less. 
.thursday...northeast winds 10 knots or less. waves 1 foot or
less. 
.thursday night...northeast winds 5 to 10 knots becoming east.
waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...northeast winds 10 to 15 knots. a chance of
showers in the evening, then showers likely overnight. waves 1 to
3 feet. 
.saturday...north winds 5 to 10 knots. showers likely during the
day. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 
.monday...east winds 5 to 10 knots becoming southeast and
increasing to 15 to 25 knots. a chance of showers monday night.
waves 2 feet or less building to 2 to 4 feet. 

$$

fzus61 kcle 230244
glfle 
expires:202604230815;;829143

open lake forecast for lake erie
national weather service cleveland oh
1044 pm edt wed apr 22 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 stationary front will persist south of lake erie into friday.
low pressure 29.60 inches will move east through the central great
lakes friday night into saturday, followed by high pressure 
30.10 inches on sunday. another low pressure system 29.50 inches 
will move northeast into the upper midwest on monday.


lez162>164-230815-
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-
1044 pm edt wed apr 22 2026

.rest of tonight...east winds 5 to 10 knots becoming northeast. a
slight chance of showers late this evening. waves 1 foot or less.
.thursday...east winds 10 knots or less. waves 1 foot or less. 
.thursday night...east winds 5 to 10 knots becoming south. waves
1 foot or less. 
.friday...south winds 5 to 10 knots becoming east. a chance of
showers in the afternoon. waves 2 feet or less. 
.friday night...east winds 10 to 15 knots becoming west. showers.
waves 2 feet or less. 
.saturday...northwest winds 10 to 15 knots becoming northeast. a
chance of showers during the day. waves 1 to 2 feet. 
.sunday...northeast winds 10 to 15 knots becoming east. waves
2 feet or less. 
.monday...east winds 10 to 15 knots becoming south and increasing
to 15 to 25 knots. a chance of showers during the day, then
showers likely monday night. waves 1 to 3 feet building to 2 to
4 feet. 

$$

fzus61 kcle 230244
glfle 
expires:202604230815;;829144

open lake forecast for lake erie
national weather service cleveland oh
1044 pm edt wed apr 22 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 stationary front will persist south of lake erie into friday.
low pressure 29.60 inches will move east through the central great
lakes friday night into saturday, followed by high pressure 
30.10 inches on sunday. another low pressure system 29.50 inches 
will move northeast into the upper midwest on monday.


lez165>167-230815-
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-
1044 pm edt wed apr 22 2026

.rest of tonight...northeast winds less than 10 knots. waves
1 foot or less. 
.thursday...east winds 10 knots or less. waves 1 foot or less. 
.thursday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.friday...east winds 5 to 15 knots. waves 1 to 3 feet. 
.friday night...east winds 10 to 15 knots becoming north.
showers. waves 1 to 3 feet. 
.saturday...northwest winds around 10 knots becoming north. a
chance of showers during the day. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots becoming east. waves 1 to
2 feet. 
.monday...east winds 10 to 15 knots becoming southeast and
increasing to 15 to 25 knots. a chance of showers during the day,
then showers likely monday night. waves 1 to 3 feet building to
3 to 5 feet. 

$$

fzus63 kdtx 230751
glflh 
expires:202604231600;;842151

open lake forecast for lake huron
national weather service detroit/pontiac mi
351 am edt thu apr 23 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 holds over the region before a warm 
front slowly lifts into the area late today into friday. a low 
will develop along the front and track across the southern great 
lakes friday night.


lhz363-231600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
351 am edt thu apr 23 2026

.today...east winds 5 to 10 knots increasing to 10 to 15 knots
late in the afternoon. waves 2 feet or less. 
.tonight...east winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet in the late evening and overnight. 
.friday...east winds 10 to 15 knots. a chance of showers in the
afternoon. waves 3 to 5 feet. 
.friday night...east winds 10 to 15 knots. showers. waves 3 to
5 feet. 
.saturday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. showers likely in the morning...
then a chance of showers late in the morning. waves 2 to 4 feet
subsiding to 1 to 3 feet late in the evening. 
.sunday...north winds 5 to 10 knots veering to the northeast by
midnight. waves 2 feet or less. 
.monday...east winds 5 to 10 knots increasing to 20 to 25 knots
with gusts to around 30 knots. showers likely by midnight. waves
2 feet or less building to 8 to 12 feet. waves occasionally
around 15 feet. 


$$

fzus63 kdtx 230751
glfsc 
expires:202604231600;;842154

lake st clair forecast
national weather service detroit/pontiac mi
351 am edt thu apr 23 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 holds over the region before a warm 
front slowly lifts into the area late today into friday. a low 
will develop along the front and track across the southern great 
lakes friday night.


lcz460-231600-
lake st clair-
351 am edt thu apr 23 2026

.today...east winds 5 to 10 knots. sunny. waves 2 feet or less.
.tonight...southeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.
.friday...southeast winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. partly sunny. a chance of light
showers early in the afternoon. waves 2 feet or less.
.friday night...southeast winds 10 to 15 knots becoming northeast 5
to 10 knots after midnight. showers...then a chance of light showers
after midnight. waves 2 feet or less.
.saturday...north winds 10 to 15 knots. mostly cloudy in the morning
becoming partly cloudy. waves 2 feet or less.
.sunday...northeast winds 5 to 10 knots. partly cloudy. waves 2 feet
or less.
.monday...southeast winds 20 to 25 knots with gusts to 30 knots.
partly cloudy. a chance of light showers. waves 2 to 4 feet. a small
craft advisory may be needed.

$$

fzus63 kdtx 230751
glflh 
expires:202604231600;;842150

open lake forecast for lake huron
national weather service detroit/pontiac mi
351 am edt thu apr 23 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 holds over the region before a warm 
front slowly lifts into the area late today into friday. a low 
will develop along the front and track across the southern great 
lakes friday night.


lhz361-362-231600-
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-
351 am edt thu apr 23 2026

.today...east winds 5 to 10 knots increasing to 10 to 15 knots in
the late morning and afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon. 
.tonight...east winds 15 to 20 knots increasing to 20 to 25 knots
early in the morning. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.friday...east winds 20 to 25 knots with gusts to around
30 knots. a chance of showers in the afternoon. waves 8 to
12 feet. waves occasionally around 15 feet. 
.friday night...east winds 15 to 20 knots. showers in the
evening...then showers likely after midnight. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers.
waves 4 to 6 feet subsiding to 1 to 3 feet. waves occasionally
around 8 feet. 
.sunday...north winds 5 to 10 knots veering to the northeast by
midnight. waves 2 feet or less. 
.monday...east winds 5 to 10 knots increasing to 20 to 25 knots
with gusts to 35 knot gales. a chance of showers . waves 1 to
3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 


$$

fzus63 kdtx 230751
glflh 
expires:202604231600;;842152

open lake forecast for lake huron
national weather service detroit/pontiac mi
351 am edt thu apr 23 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 holds over the region before a warm 
front slowly lifts into the area late today into friday. a low 
will develop along the front and track across the southern great 
lakes friday night.


lhz462>464-231600-
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-
351 am edt thu apr 23 2026

.today...east winds 5 to 10 knots. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots becoming southeast 10 to
15 knots early in the morning. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. a chance of showers in
the afternoon. waves 2 to 4 feet. 
.friday night...southeast winds 10 to 15 knots. showers in the
evening...then showers likely after midnight. waves 3 to 5 feet. 
.saturday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. a chance of showers. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast 20 to
25 knots with gusts to 35 knot gales. a chance of showers early
in the evening. rain showers likely by midnight. waves 1 to
3 feet building to 8 to 12 feet. waves occasionally around
15 feet. 


$$

fzus63 kmkx 230743
glflm 
expires:202604231515;;842056

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 am cdt thu apr 23 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...

a few areas of fog may develop over southern portions of the lake 
early this morning, lifting northward and likely eroding through the 
course of today. south to southeast winds accelerate across the lake 
this morning and afternoon as low pressure around 29.2 inches tracks 
eastward across the northern great plains. due to a surface high 
pressure ridge over far southeastern ontario canada, winds remain 
due easterly over the northern tip of the lake today into friday, 
and may gust to around 30 kt tonight into friday. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in a breezy north-northwest wind shift. 
showers and thunderstorms are expected late thursday night through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
29.4 inch low pressure is forecast to track northeastward from the 
central great plains (sunday night) near or over lake michigan 
(monday night), with gusty east to southeast winds ahead of its 
arrival and gusty west winds behind it (into tuesday). not seeing 
widespread gale potential with this system, though trends will be 
monitored.



lmz364-366-563-565-567-868-231515-
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-
243 am cdt thu apr 23 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

.today...south to southeast winds 10 to 15 kt increasing to 10 to
20 kt. patchy fog this afternoon. waves 2 to 4 ft building to 3 
to 5 ft.
.tonight...southeast winds 10 to 20 kt. patchy dense fog in the
evening. chance of rain showers and thunderstorms overnight.
waves 4 to 6 ft occasionally to 8 ft. 
.friday...southeast winds 10 to 20 kt becoming southwest. rain
showers likely in the morning, then rain showers likely with a
chance of thunderstorms in the afternoon. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.friday night...northwest winds 10 to 20 kt becoming north.
chance of rain showers in the evening. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.monday...east winds to 30 kt. chance of rain showers. waves 6 to
9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 230743
glflm 
expires:202604231515;;842055

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 am cdt thu apr 23 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...

a few areas of fog may develop over southern portions of the lake 
early this morning, lifting northward and likely eroding through the 
course of today. south to southeast winds accelerate across the lake 
this morning and afternoon as low pressure around 29.2 inches tracks 
eastward across the northern great plains. due to a surface high 
pressure ridge over far southeastern ontario canada, winds remain 
due easterly over the northern tip of the lake today into friday, 
and may gust to around 30 kt tonight into friday. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in a breezy north-northwest wind shift. 
showers and thunderstorms are expected late thursday night through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
29.4 inch low pressure is forecast to track northeastward from the 
central great plains (sunday night) near or over lake michigan 
(monday night), with gusty east to southeast winds ahead of its 
arrival and gusty west winds behind it (into tuesday). not seeing 
widespread gale potential with this system, though trends will be 
monitored.



lmz261-362-231515-
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-
243 am cdt thu apr 23 2026

rock island passage to charlevoix mi north...

.today...southeast winds 10 to 20 kt becoming east 15 to 25 kt.
waves 2 to 4 ft. 
.tonight...east winds to 30 kt. slight chance of rain showers
overnight. waves 4 to 7 ft occasionally to 9 ft. 
.friday...east winds to 30 kt. chance of rain showers in the
morning, then rain showers likely in the afternoon. waves 4 to
7 ft occasionally to 9 ft. 
.friday night...northeast winds to 30 kt diminishing to 15 to
25 kt. chance of rain showers. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 ft or less. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves nearly calm. 
.monday...east winds 15 to 25 kt increasing to 30 kt. chance of
rain showers. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft.  

$$

fzus63 kmkx 230743
glflm 
expires:202604231515;;842057

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 am cdt thu apr 23 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...

a few areas of fog may develop over southern portions of the lake 
early this morning, lifting northward and likely eroding through the 
course of today. south to southeast winds accelerate across the lake 
this morning and afternoon as low pressure around 29.2 inches tracks 
eastward across the northern great plains. due to a surface high 
pressure ridge over far southeastern ontario canada, winds remain 
due easterly over the northern tip of the lake today into friday, 
and may gust to around 30 kt tonight into friday. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in a breezy north-northwest wind shift. 
showers and thunderstorms are expected late thursday night through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
29.4 inch low pressure is forecast to track northeastward from the 
central great plains (sunday night) near or over lake michigan 
(monday night), with gusty east to southeast winds ahead of its 
arrival and gusty west winds behind it (into tuesday). not seeing 
widespread gale potential with this system, though trends will be 
monitored.



lmz080-669-671-673-675-777-779-870-872-874-876-878-231515-
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-
243 am cdt thu apr 23 2026

sheboygan wi to pentwater mi south...

.today...south winds 10 to 15 kt becoming southeast 10 to 20 kt.
patchy fog. waves 2 to 4 ft building to 3 to 5 ft. 
.tonight...southeast winds 10 to 20 kt becoming south. chance of
showers and thunderstorms overnight. waves 4 to 6 ft occasionally
to 8 ft. 
.friday...south winds 10 to 20 kt becoming southwest. rain
showers likely with a chance of thunderstorms in the morning,
then rain showers likely in the afternoon. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.friday night...west winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.saturday night...north winds 10 to 15 kt becoming northeast 5 to
10 kt. waves 2 to 4 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 3 ft. 
.monday...southeast winds to 30 kt. rain showers likely. waves
7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 230218
glflm 
expires:202604230945;;828634

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
918 pm cdt wed apr 22 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...

winds will veer southeast tonight and accelerate thursday 
afternoon becoming breezy through friday morning as 29.2 inch low 
pressure develops over the northern great plains. this low 
pressure system will slowly track east toward the central portion 
of the lake friday night. some 30 kt easterly winds may occur over
the northern tip of the lake thursday night and friday.

the low will pull a cold front across lake michigan friday 
afternoon and evening, resulting in a breezy north-northwest wind
shift. showers and thunderstorms are expected late thursday night
through friday, both ahead of and along the front. severe weather
is not anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan. 29.4 inch low pressure is forecast to track 
northeastward from the central great plains (sunday night) near or
over lake michigan (monday night), with gusty east to southeast 
winds ahead of its arrival and gusty west or northwest winds 
behind it (into tuesday). not seeing widespread gale potential 
with this system, though trends will be monitored.


lmz261-362-364-366-563-565-567-868-230945-
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-
918 pm cdt wed apr 22 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northeast winds 5 to 10 kt veering to
southeast 10 to 15 kt. waves 1 to 2 ft. 
.thursday...southeast winds 10 to 20 kt increasing to 15 to
25 kt. patchy dense fog in the morning, then patchy fog in the
afternoon. waves 3 to 5 ft. 
.thursday night...southeast winds to 30 kt. patchy dense fog in
the evening. chance of rain showers overnight. waves 4 to 7 ft
occasionally to 9 ft. 
.friday...southeast winds to 30 kt becoming south. rain showers
likely. waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less. 
.monday...southeast winds 15 to 25 kt increasing to 30 kt. chance
of rain showers. waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842551

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu apr 23 2026 /300 am cdt thu apr 23 2026/

.early this morning...east winds 10 to 20 knots. waves 2 to
4 feet. 
.today...east winds 10 to 20 knots backing northeast late. a
chance of showers and thunderstorms by mid afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 10 to 20 knots backing northeast late. rain
showers and a chance of thunderstorms. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday...west winds 10 to 20 knots. a chance of rain showers.
waves subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of rain showers.
waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...northeast winds 20 to 30 knots. a chance of rain
showers, then rain showers likely. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842552

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz263-232000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 am edt thu apr 23 2026

.early this morning...east winds 10 to 20 knots. a slight chance
of rain showers. waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet. 
.today...east winds 15 to 25 knots increasing to 20 to 30 knots
late. a slight chance of showers and thunderstorms by mid
afternoon. waves building to 6 to 9 feet occasionally to 11 feet.
.tonight...southeast winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 8 to 11 feet
occasionally to 14 feet. 
.friday...west winds 20 to 30 knots diminishing to 10 to
20 knots. rain showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of rain
showers by mid afternoon. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of rain showers.
waves subsiding to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 10 to 20 knots.
waves building to 1 to 3 feet. 
.monday...east winds 20 to 30 knots. a chance of rain showers,
then rain showers likely. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842553

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt thu apr 23 2026

...gale warning in effect from this evening through friday
afternoon...

.early this morning...east winds 15 to 25 knots. a chance of rain
showers. waves 3 to 5 feet occasionally to 7 feet. 
.today...east winds 20 to 30 knots veering southeast in the
afternoon. waves building to 7 to 10 feet occasionally to
13 feet. 
.tonight...southeast gales to 35 knots. a chance of rain showers
through midnight. a chance of thunderstorms. rain showers likely
after midnight. waves building to 9 to 12 feet occasionally to
15 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon, then becoming west 15 to 25 knots
late. a slight chance of thunderstorms through early afternoon.
rain showers. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east. waves calm
to 2 feet. 
.monday...east winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. waves building to 5 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842554

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt thu apr 23 2026

.early this morning...southeast winds 15 to 25 knots. waves 2 to
4 feet. 
.today...southeast winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. waves
building to 5 to 8 feet occasionally to 10 feet. 
.tonight...southeast winds to 30 knots with a few gale force
gusts to 35 knots possible. a chance of showers and
thunderstorms. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday...southeast winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots in the
afternoon, then becoming west 15 to 25 knots late. rain showers
and a slight chance of thunderstorms. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 15 to 25 knots becoming north 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...east gales to 35 knots. a chance of rain showers, then
rain showers likely. waves building to 5 to 8 feet occasionally
to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842555

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz266-232000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 am edt thu apr 23 2026

...gale warning in effect from this evening through friday
afternoon...

.early this morning...southeast winds 15 to 25 knots. a slight
chance of rain showers. waves 2 to 4 feet. 
.today...southeast winds 20 to 30 knots increasing to gales to
35 knots late. a slight chance of rain showers through early
afternoon. waves building to 6 to 9 feet occasionally to 11 feet.
.tonight...southeast gales to 35 knots. a chance of rain showers
and a slight chance of thunderstorms. waves building to 9 to
12 feet occasionally to 15 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots late. rain showers and a slight chance of thunderstorms.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.friday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...east gales to 35 knots. a chance of rain showers. waves
building to 5 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202604232000;;842556

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu apr 23 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...

this morning, lake superior is between 30.2 inch ridging over 
northern ontario and 29.2 inch low pressure straddling the us/canada 
border at north dakota. throughout today, the ridge will progress 
slightly to james bay while the low weakens to 29.4 inches and sends 
a 29.5 inch trough to the far western end of lake superior. as the 
parent low weakens to 29.9 inches friday into saturday and remnant 
troughing moves south of the lower great lakes at 29.7 inches, 30.0 
inch ridging will build over lake superior. by late sunday, this 
ridge builds to 30.1 inches. meanwhile, a 29.3 inch colorado low 
develops, moving towards the upper midwest by early monday, causing 
pressure over lake superior to begin to fall rapidly toward 29.5 by 
mid-monday, with the low crossing lake superior at 29.4 inches by 
tuesday afternoon.



lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt thu apr 23 2026

...gale warning in effect from this evening through friday
afternoon...

.early this morning...southeast winds 15 to 25 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.today...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tonight...southeast gales to 40 knots. a slight chance of rain
showers after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.friday...southeast gales to 40 knots diminishing to 20 to
30 knots late. a chance of rain showers through early afternoon,
then rain showers likely and a slight chance of thunderstorms by
mid afternoon. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.friday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. rain showers likely through
midnight, then a chance of rain showers after midnight. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.saturday night...west winds 5 to 15 knots backing east after
midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 20 to 30 knots becoming southeast gales to
35 knots. a chance of rain showers. waves building to 5 to 9 feet
occasionally to 11 feet. 

$$