fzus61 kbuf 232003
glflo 
expires:202604240300;;870415

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu apr 23 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 strong 30.7 inch high centered well to the north will 
remain ridged south across the lake through friday. a 29.6 inch low 
over the upper great lakes friday morning will nudge a warm front 
toward the lake as it moves into the central great lakes friday 
afternoon. this low will slightly weaken to 29.7 inches as it passes 
just southwest of lake friday night while nudging the warm front a 
bit further east over the lake. the low then slides southeast into 
the mid atlantic region saturday forcing the front back to the 
southwest of the lake. a 30.2 inch area of high pressure will then 
build across the lower great lakes saturday night through monday. a 
29.4 inch area of low pressure over the great plains monday night, 
will advance northeast into the upper great lakes later monday night 
into tuesday morning while pushing an attendant warm front across 
the lake. the 29.4 inch low will then continue northeast to james 
bay tuesday night sending an attendant cold front across the lake.


loz063>065-240300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt thu apr 23 2026

.tonight...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 15 to
20 knots. a chance of showers overnight. waves 2 feet or less
building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots. showers likely. waves 3 to
5 feet. 
.saturday night...east winds 5 to 15 knots. rain showers likely
in the evening, then a chance of rain showers overnight. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...east winds 5 to 10 knots becoming light and variable.
waves 1 foot or less. 
.monday...east winds 10 knots or less becoming southeast and
increasing to 15 to 20 knots. waves 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south. showers
likely. waves 2 to 4 feet building to 3 to 5 feet, then subsiding
to 2 to 4 feet. 

$$

fzus61 kbuf 232003
glflo 
expires:202604240300;;870414

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu apr 23 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 strong 30.7 inch high centered well to the north will 
remain ridged south across the lake through friday. a 29.6 inch low 
over the upper great lakes friday morning will nudge a warm front 
toward the lake as it moves into the central great lakes friday 
afternoon. this low will slightly weaken to 29.7 inches as it passes 
just southwest of lake friday night while nudging the warm front a 
bit further east over the lake. the low then slides southeast into 
the mid atlantic region saturday forcing the front back to the 
southwest of the lake. a 30.2 inch area of high pressure will then 
build across the lower great lakes saturday night through monday. a 
29.4 inch area of low pressure over the great plains monday night, 
will advance northeast into the upper great lakes later monday night 
into tuesday morning while pushing an attendant warm front across 
the lake. the 29.4 inch low will then continue northeast to james 
bay tuesday night sending an attendant cold front across the lake.


loz062-240300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt thu apr 23 2026

.tonight...northeast 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. 
.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 25 knots. showers likely. waves 5 to
8 feet. waves occasionally around 10 feet. 
.saturday night...east winds 15 to 20 knots becoming northeast
10 to 15 knots. rain showers likely in the evening, then a chance
of rain showers overnight. waves 3 to 6 feet subsiding to 1 to
3 feet. 
.sunday...northeast winds 10 knots or less becoming east. waves
2 feet or less. 
.monday...east winds 5 to 15 knots becoming southeast. a chance
of showers monday night. waves 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south 10 to
15 knots. showers. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

fzus61 kcle 231953
glfle 
expires:202604240215;;869946

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt thu apr 23 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 warm front will become stationary over lake erie tonight ahead
of low pressure 29.30 inches that moves into the northwest great 
lakes on friday. this low will move across the lake friday night
and early saturday while strengthening to 29.70 inches. high 
pressure 30.10 inches will build into the great lakes region late
saturday and sunday. a warm front will approach the lake on 
monday followed by a cold front tuesday.


lez165>167-240215-
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-
353 pm edt thu apr 23 2026

.tonight...east winds 5 to 10 knots becoming southeast. waves
1 to 2 feet. 
.friday...southeast winds 10 to 15 knots becoming east 15 to
20 knots. a slight chance of showers early in the afternoon.
waves 2 feet or less building to 2 to 4 feet. 
.friday night...east winds 15 to 20 knots becoming northeast
10 to 15 knots. showers. waves 2 to 4 feet building to 3 to
5 feet, then subsiding to 2 to 4 feet. 
.saturday...north winds 5 to 10 knots. a chance of showers. waves
2 to 3 feet. 
.saturday night...north winds around 10 knots becoming northeast.
waves 1 to 2 feet. 
.sunday...northeast winds 10 to 15 knots becoming east. waves
1 to 2 feet. 
.monday...east winds 5 to 15 knots becoming southeast and
increasing to 15 to 25 knots. showers likely monday night. waves
1 to 3 feet building to 2 to 4 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely during the day. waves 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 231953
glfle 
expires:202604240215;;869947

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt thu apr 23 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 warm front will become stationary over lake erie tonight ahead
of low pressure 29.30 inches that moves into the northwest great 
lakes on friday. this low will move across the lake friday night
and early saturday while strengthening to 29.70 inches. high 
pressure 30.10 inches will build into the great lakes region late
saturday and sunday. a warm front will approach the lake on 
monday followed by a cold front tuesday.


lez061-168-169-240215-
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-
353 pm edt thu apr 23 2026

.tonight...east winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.friday...northeast winds 15 to 20 knots. waves 1 to 3 feet
building to 2 to 4 feet. 
.friday night...northeast winds 15 to 20 knots. showers likely
with a chance of thunderstorms in the evening, then showers
overnight. waves 2 to 4 feet. 
.saturday...northeast winds 10 to 15 knots becoming north.
showers likely in the morning, then a chance of showers in the
afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday night...northeast winds 5 to 10 knots. a chance of
showers in the evening. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots 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 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 231953
glfle 
expires:202604240215;;869945

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt thu apr 23 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 warm front will become stationary over lake erie tonight ahead
of low pressure 29.30 inches that moves into the northwest great 
lakes on friday. this low will move across the lake friday night
and early saturday while strengthening to 29.70 inches. high 
pressure 30.10 inches will build into the great lakes region late
saturday and sunday. a warm front will approach the lake on 
monday followed by a cold front tuesday.


lez162>164-240215-
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-
353 pm edt thu apr 23 2026

.tonight...east winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.friday...south winds 5 to 15 knots becoming east. a slight
chance of showers and thunderstorms late. waves 1 to 3 feet. 
.friday night...east winds 5 to 15 knots becoming northwest.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 1 to 3 feet. 
.saturday...northwest winds 5 to 10 knots becoming north. waves
1 to 2 feet. 
.saturday night...northeast winds 10 to 15 knots. waves 1 to
2 feet. 
.sunday...northeast winds 10 to 15 knots becoming east. waves
1 to 2 feet. 
.monday...east winds 10 to 15 knots becoming southeast and
increasing to 15 to 25 knots. showers monday night. waves 1 to
3 feet. 
.tuesday...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers during the
day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 231935
glflh 
expires:202604240345;;869452

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm 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 as a warm front
slowly lifts into the area this afternoon into friday. low
pressure, 29.7 inches, then develops along the front and tracks
across the southern great lakes friday night. this low will bring
increased chances for storms friday afternoon into early
saturday.


lhz363-240345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
335 pm edt thu apr 23 2026

.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...northeast winds 10 to 15 knots. a chance of showers.
waves 2 to 4 feet. 
.saturday night...north winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
2 feet or less building to 8 to 12 feet. waves occasionally
around 15 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales becoming south 20 to 25 knots with gusts to around 30 knots
in the late morning and early afternoon...then decreasing to
15 to 20 knots early in the evening decreasing to 10 to 15 knots
by midnight. showers likely early in the morning...then a chance
of showers until early evening. waves 6 to 9 feet subsiding to
3 to 5 feet by midnight. waves occasionally around 12 feet. 


$$

fzus63 kdtx 231935
glfsc 
expires:202604240345;;869455

lake st clair forecast
national weather service detroit/pontiac mi
335 pm 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 as a warm front
slowly lifts into the area this afternoon into friday. low
pressure, 29.7 inches, then develops along the front and tracks
across the southern great lakes friday night. this low will bring
increased chances for storms friday afternoon into early
saturday.


lcz460-240345-
lake st clair-
335 pm edt thu apr 23 2026

.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. waves 2 feet or
less.
.friday night...southeast winds 10 to 15 knots becoming east 5 to 10
knots after midnight. a chance of showers early in the evening. rain
showers by midnight...then light showers likely after midnight.
waves 2 feet or less.
.saturday...north winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. mostly cloudy. waves 2 feet or
less.
.saturday night...north winds 10 to 15 knots becoming northeast 5 to
10 knots after midnight. mostly clear. waves 2 feet or less.
.sunday...northeast winds 5 to 10 knots. partly sunny in the morning
becoming mostly clear. 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.
.tuesday...west winds to 30 knots. light showers. waves 2 to 4 feet.

$$

fzus63 kdtx 231935
glflh 
expires:202604240345;;869451

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm 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 as a warm front
slowly lifts into the area this afternoon into friday. low
pressure, 29.7 inches, then develops along the front and tracks
across the southern great lakes friday night. this low will bring
increased chances for storms friday afternoon into early
saturday.


lhz361-362-240345-
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-
335 pm edt thu apr 23 2026

.tonight...east winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to around 30 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. waves 8 to 12 feet. waves occasionally around 15 feet. 
.friday night...east winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. 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
in the morning. waves 3 to 5 feet. 
.saturday night...north winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots veering to the east late
in the evening. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
1 to 3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales decreasing to 20 to 25 knots with gusts to 35 knot gales in
the late morning and early afternoon...then becoming south 15 to
20 knots early in the evening decreasing to 10 to 15 knots by
midnight. showers likely early in the morning...then a chance of
showers until early evening. waves 8 to 12 feet subsiding to 4 to
6 feet by midnight. waves occasionally around 15 feet. 


$$

fzus63 kdtx 231935
glflh 
expires:202604240345;;869453

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm 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 as a warm front
slowly lifts into the area this afternoon into friday. low
pressure, 29.7 inches, then develops along the front and tracks
across the southern great lakes friday night. this low will bring
increased chances for storms friday afternoon into early
saturday.


lhz462>464-240345-
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-
335 pm edt thu apr 23 2026

.tonight...east winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. waves 2 to 4 feet. 
.friday night...east winds 10 to 15 knots. a chance of showers in
the evening...then showers after midnight. waves 2 to 4 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers.
waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning
and afternoon. 
.saturday night...north winds 10 to 15 knots becoming northeast
5 to 10 knots after midnight. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
1 to 3 feet building to 6 to 9 feet. waves occasionally around
12 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales becoming south 20 to 25 knots with gusts to 35 knot gales
in the late morning and early afternoon...then decreasing to
15 to 20 knots early in the evening becoming southwest 10 to
15 knots by midnight. showers likely early in the morning...then
a chance of showers until early evening. waves 6 to 9 feet
subsiding to 3 to 5 feet . waves occasionally around 12 feet. 


$$

fzus63 kmkx 231924
glflm 
expires:202604240400;;869284

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
224 pm 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...

areas of fog will continue over the lake into tonight and friday 
due to relatively mild and moist air flowing over the cold lake 
surface. modest south to southeast winds developing this afternoon
and lasting into friday as a trough of low pressure and cold 
front approaches from the great plains. however, breezy easterly 
winds are expected over the northern tip of the lake this
afternoon into friday, as the warm front will stall before 
reaching said location. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 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.


lmz261-362-240400-
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-
224 pm cdt thu apr 23 2026

rock island passage to charlevoix mi north...

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

$$

fzus63 kmkx 231924
glflm 
expires:202604240400;;869285

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
224 pm 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...

areas of fog will continue over the lake into tonight and friday 
due to relatively mild and moist air flowing over the cold lake 
surface. modest south to southeast winds developing this afternoon
and lasting into friday as a trough of low pressure and cold 
front approaches from the great plains. however, breezy easterly 
winds are expected over the northern tip of the lake this
afternoon into friday, as the warm front will stall before 
reaching said location. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 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.


lmz364-366-563-565-567-868-240400-
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-
224 pm cdt thu apr 23 2026

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

.tonight...south winds 15 to 25 kt becoming southeast 10 to
20 kt. patchy fog this evening. chance of rain showers and slight
chance of thunderstorms overnight. waves 3 to 5 ft. 
.friday...southeast winds 10 to 20 kt veering to west. patchy
fog. chance of rain showers and slight chance of thunderstorms.
waves 3 to 5 ft. 
.friday night...north winds 10 to 20 kt. patchy fog in the
evening. waves 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 20 kt becoming east 5 to
10 kt overnight. waves 1 to 3 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 2 ft. 
.sunday night...northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. waves 1 to 3 ft building to 4 to 6 ft occasionally
to 8 ft. 
.monday...east winds 15 to 25 kt becoming southeast to 30 kt.
waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...southwest winds to 30 kt. chance of rain showers.
waves 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 231924
glflm 
expires:202604240400;;869286

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
224 pm 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...

areas of fog will continue over the lake into tonight and friday 
due to relatively mild and moist air flowing over the cold lake 
surface. modest south to southeast winds developing this afternoon
and lasting into friday as a trough of low pressure and cold 
front approaches from the great plains. however, breezy easterly 
winds are expected over the northern tip of the lake this
afternoon into friday, as the warm front will stall before 
reaching said location. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240400-
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-
224 pm cdt thu apr 23 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers and thunderstorms overnight. waves 3 to
5 ft. 
.friday...south winds 10 to 20 kt veering to west. chance of rain
showers and thunderstorms in the morning, then chance of rain
showers and slight chance of thunderstorms in the afternoon.
waves 3 to 5 ft. 
.friday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.saturday night...north winds 10 to 20 kt becoming east 10 to
15 kt. waves 2 to 4 ft. 
.sunday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft. 
.sunday night...east winds 10 to 20 kt. waves 2 to 4 ft building
to 4 to 7 ft occasionally to 9 ft. 
.monday...southeast winds to 30 kt. chance of rain showers and
thunderstorms. waves 7 to 10 ft occasionally to 13 ft. 
.tuesday...southwest winds to 30 kt. waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870381

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu apr 23 2026 /301 pm cdt thu apr 23 2026/

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

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870382

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz263-240800-
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-
401 pm edt thu apr 23 2026

.late this afternoon...east winds 15 to 25 knots. a slight chance
of showers and thunderstorms. waves 4 to 8 feet occasionally to
10 feet. 
.tonight...southeast winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 7 to 10 feet
occasionally to 13 feet. 
.friday...west winds 20 to 30 knots diminishing to 10 to
20 knots. rain showers and a slight chance of thunderstorms
through early afternoon, then a chance of rain showers by mid
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet.
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then backing northwest late. waves
subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...east winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers, then rain showers likely.
waves building to 6 to 9 feet occasionally to 11 feet. 
.tuesday...west gales to 35 knots diminishing to 15 to 25 knots.
a chance of rain showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870383

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

.late this afternoon...east winds 20 to 30 knots. waves 5 to
9 feet occasionally to 11 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 8 to 11 feet occasionally to
14 feet. 
.friday...southeast gales to 35 knots 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 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 5 to 15 knots veering north after
midnight. a slight chance of rain showers through midnight. waves
subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.saturday night...east winds less than 10 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east gales to 40 knots. a chance of rain showers, then
rain showers likely. waves building to 7 to 10 feet occasionally
to 13 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots.
a chance of rain showers. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870384

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu apr 23 2026

.late this afternoon...southeast winds to 30 knots with a few
gale force gusts to 35 knots possible. waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet. 
.tonight...southeast winds 20 to 30 knots. a chance of showers
and thunderstorms. waves 4 to 7 feet occasionally to 9 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 through early afternoon,
then a chance of rain showers by mid afternoon. waves building to
5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.friday night...west winds 10 to 20 knots veering northwest after
midnight. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 10 to 20 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...east gales to 35 knots becoming southeast gales to
40 knots. a chance of rain showers, then rain showers likely.
waves building to 7 to 11 feet occasionally to 14 feet. 
.tuesday...west gales to 40 knots. a chance of rain showers.
waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870385

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz266-240800-
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-
401 pm edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

.late this afternoon...southeast winds 20 to 30 knots. waves 4 to
8 feet occasionally to 10 feet. 
.tonight...southeast gales to 35 knots. a chance of rain showers
and a slight chance of thunderstorms. waves building to 8 to
11 feet occasionally to 14 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots late. a chance of rain showers through early afternoon.
a slight chance of thunderstorms. rain showers by mid afternoon.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...west winds 10 to 20 knots veering northwest after
midnight. a chance of rain showers. waves subsiding to 1 to
3 feet. 
.saturday...northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...east gales to 40 knots veering southeast. a chance of
rain showers, then rain showers likely. waves building to 7 to
10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots. a chance of rain showers.
waves subsiding to 6 to 9 feet occasionally to 11 feet, then
building to 7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 232002
glfls 
expires:202604240800;;870386

open lake forecast for lake superior
national weather service marquette mi
401 pm 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...

a rather tight longitudinal pressure gradient sits across lake 
superior this afternoon, with 30.0 inches at whitefish bay and 29.7 
inches near duluth, thanks to ridging over james bay and a 29.2 inch 
low sitting just north of north dakota in canada. between now and 
friday evening, the james bay high persists while the canadian low 
swings north into manitoba, sending troughing of around 29.6 inches 
across lake superior. late friday and into saturday, the parent low 
weakens considerably as remnant troughing moves south and 30.0 inch 
ridging builds over lake superior by late saturday. this ridge 
builds to 30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

.late this afternoon...southeast winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet. 
.tonight...southeast winds 20 to 30 knots increasing to gales to
35 knots after midnight. a slight chance of rain showers after
midnight. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 5 to 8 feet occasionally to 10 feet. 
.friday...southeast gales to 40 knots diminishing to 20 to
30 knots late. a slight chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...southeast winds 10 to 20 knots backing east late.
rain showers likely through midnight, then a chance of rain
showers after midnight. waves subsiding to 1 to 3 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...southeast gales to 40 knots. rain showers likely. waves
building to 5 to 9 feet occasionally to 11 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots. rain showers likely, then a chance of rain showers.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 

$$