fzus61 kbuf 042002
glflo 
expires:202605050300;;015752

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon may 4 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 29.1 inch low over hudson bay tonight through tuesday 
will weaken to 29.3 inches as it moves to northern quebec through 
wednesday. its trailing wavy cold front will slowly cross the lake 
late tuesday, then will drift across new england wednesday and out 
to sea thursday. a 30.1 inch high over the tennessee and ohio 
valleys thursday night will slide to the mid-atlantic coastline 
friday.


loz062-050300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt mon may 4 2026

.tonight...southwest winds 15 to 20 knots. a chance of showers
late this evening. waves 2 to 4 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers through early afternoon, then
showers likely late. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots becoming east.
rain likely in the evening, then rain overnight. waves 2 feet or
less. 
.wednesday...northeast winds 5 to 10 knots becoming west. rain in
the morning, then showers likely in the afternoon. waves 1 foot
or less. 
.wednesday night...west winds 5 to 10 knots. waves 1 foot or
less. 
.thursday...west winds 5 to 10 knots. waves 1 foot or less. 
.friday...west winds 5 to 10 knots becoming southwest. waves 1 to
2 feet. 
.saturday...southwest winds 5 to 10 knots becoming west. a chance
of showers. waves 1 to 2 feet. 

$$

fzus61 kbuf 042002
glflo 
expires:202605050300;;015753

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon may 4 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 29.1 inch low over hudson bay tonight through tuesday 
will weaken to 29.3 inches as it moves to northern quebec through 
wednesday. its trailing wavy cold front will slowly cross the lake 
late tuesday, then will drift across new england wednesday and out 
to sea thursday. a 30.1 inch high over the tennessee and ohio 
valleys thursday night will slide to the mid-atlantic coastline 
friday.


loz063>065-050300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon may 4 2026

.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers after midnight. waves 1 to 3 feet
building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers early, then showers likely late in
the morning. showers likely with a chance of thunderstorms in the
afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots becoming south less
than 10 knots. rain with a chance of thunderstorms in the
evening, then rain overnight. waves 1 to 3 feet subsiding to
1 foot or less. 
.wednesday...north winds 5 to 10 knots becoming northwest. rain
in the morning, then showers in the afternoon. waves 1 foot or
less. 
.wednesday night...west winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 
.thursday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest. waves 1 to
3 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 041942
glfle 
expires:202605050215;;015202

open lake forecast for lake erie
national weather service cleveland oh
342 pm edt mon may 4 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 cold front will move east across lake erie during the day
tuesday before exiting to the east tuesday evening. high pressure
30.10 inches will slowly build east over the region wednesday and
thursday with low pressure 29.90 inches moving east across the 
great lakes friday and saturday.


lez162>166-050215-
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-
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-
342 pm edt mon may 4 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 041942
glfle 
expires:202605050215;;015203

open lake forecast for lake erie
national weather service cleveland oh
342 pm edt mon may 4 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 cold front will move east across lake erie during the day
tuesday before exiting to the east tuesday evening. high pressure
30.10 inches will slowly build east over the region wednesday and
thursday with low pressure 29.90 inches moving east across the 
great lakes friday and saturday.


lez061-167>169-050215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
342 pm edt mon may 4 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 041941
glfsc 
expires:202605050345;;015184

lake st clair forecast
national weather service detroit/pontiac mi
341 pm edt mon may 4 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...southwest winds continue through this evening. a cold
front moves through tonight into tomorrow morning which veers
wind direction from southwest to north. behind the front, winds
across the region will be lighter and variable in direction.
another low pressure system organizes well south of the area
tuesday into wednesday, favoring the gradual development of
northeast winds. as this low moves over the northeast mid to late
week, northeast winds will back from the northeast to northerly,
and eventually take on a more westerly component by thursday.


lcz460-050345-
lake st clair-
341 pm edt mon may 4 2026

.tonight...southwest winds 15 to 20 knots. gusts to 30 knots early
in the evening. partly cloudy becoming mostly cloudy. light showers
likely late in the evening. a chance of light showers after
midnight. waves 1 to 3 feet.
.tuesday...west winds 10 to 15 knots becoming northwest 5 to 10
knots in the late morning and afternoon. cloudy. a chance of light
showers in the morning...then light showers likely in the afternoon.
waves 2 feet or less.
.tuesday night...west winds 5 to 10 knots veering to the north after
midnight. cloudy. light showers likely ...then a chance of light
showers after midnight. waves 2 feet or less.
.wednesday...north winds 5 to 10 knots. mostly cloudy. a chance of
light showers early in the morning. waves 2 feet or less.
.wednesday night...northeast winds 5 to 10 knots backing to the west
by midnight...then veering to the northwest after midnight. mostly
cloudy becoming partly cloudy. waves 2 feet or less.
.thursday...northwest winds 5 to 10 knots. partly cloudy. waves 2
feet or less.
.friday...southwest winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.saturday...west winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 041940
glflh 
expires:202605050345;;015181

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm edt mon may 4 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...southwest winds continue through this evening. a cold
front moves through tonight into tomorrow morning which veers
wind direction from southwest to north. behind the front, winds
across the region will be lighter and variable in direction.
another low pressure system organizes well south of the area
tuesday into wednesday, favoring the gradual development of
northeast winds. as this low moves over the northeast mid to late
week, northeast winds will back from the northeast to northerly,
and eventually take on a more westerly component by thursday.


lhz362-363-050345-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
340 pm edt mon may 4 2026

.tonight...southeast winds 15 to 20 knots with gusts to around
30 knots becoming north 10 to 15 knots late in the evening...then
backing to the northwest after midnight becoming west 5 to
10 knots early in the morning. a chance of showers in the
evening. waves 4 to 6 feet. waves occasionally around 8 feet. 
.tuesday...west winds 5 to 10 knots backing to the southwest
early in the afternoon...then veering to the southwest 5 to
10 knots late in the afternoon. waves 2 to 4 feet. 
.tuesday night...north winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.wednesday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.wednesday night...north winds 5 to 10 knots backing to the
northwest after midnight. waves 1 to 3 feet. 
.thursday...west winds 5 to 10 knots backing to the east late in
the afternoon...then veering to the south late in the evening.
waves 2 feet or less. 
.friday...west winds 5 to 10 knots backing to the southeast early
in the evening...then veering to the south by midnight. waves
2 feet or less. 
.saturday...west winds 5 to 10 knots backing to the southeast
early in the evening...then becoming west 10 to 15 knots by
midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 041940
glflh 
expires:202605050345;;015182

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm edt mon may 4 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...southwest winds continue through this evening. a cold
front moves through tonight into tomorrow morning which veers
wind direction from southwest to north. behind the front, winds
across the region will be lighter and variable in direction.
another low pressure system organizes well south of the area
tuesday into wednesday, favoring the gradual development of
northeast winds. as this low moves over the northeast mid to late
week, northeast winds will back from the northeast to northerly,
and eventually take on a more westerly component by thursday.


lhz462>464-050345-
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-
340 pm edt mon may 4 2026

.tonight...south winds 15 to 20 knots becoming southwest 10 to
15 knots after midnight...then veering to the northwest early in
the morning. waves 3 to 5 feet. 
.tuesday...north winds 5 to 10 knots backing to the west in the
late morning and early afternoon...then backing to the southeast
late in the afternoon. waves 1 to 3 feet. 
.tuesday night...southeast winds 5 to 10 knots backing to the
northeast in the late evening and overnight. waves 2 feet or
less. 
.wednesday...north winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots veering to the northeast
late in the afternoon...then backing to the southwest late in the
evening. waves 2 feet or less. 
.friday...west winds 5 to 10 knots backing to the east early in
the evening...then veering to the south by midnight. waves 2 feet
or less. 
.saturday...southwest winds 5 to 10 knots backing to the
southeast early in the evening...then backing to the southeast
5 to 10 knots by midnight. a chance of showers early in the
evening. waves 2 feet or less. 


$$

fzus63 kdtx 041940
glflh 
expires:202605050345;;015180

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm edt mon may 4 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...southwest winds continue through this evening. a cold
front moves through tonight into tomorrow morning which veers
wind direction from southwest to north. behind the front, winds
across the region will be lighter and variable in direction.
another low pressure system organizes well south of the area
tuesday into wednesday, favoring the gradual development of
northeast winds. as this low moves over the northeast mid to late
week, northeast winds will back from the northeast to northerly,
and eventually take on a more westerly component by thursday.


lhz361-050345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
340 pm edt mon may 4 2026

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


$$

fzus63 kmkx 042143 aaa
glflm 
expires:202605050315;;019828

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
443 pm cdt mon may 4 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...

gusty southwesterly winds will linger until early this evening, 
ahead of an approaching cold front. the cold front is in 
association with low pressure of 28.9 inches over north central 
ontario, which will track northeast toward james bay through 
tuesday. 

as this occurs, the cold front will sink southeast over lake 
michigan through this evening and clear the lake tonight, shifting
winds to northwesterly. scattered storms may occur along the 
front, supportive of gusty winds.

west to northwest winds then persist through the first half of 
tuesday. winds will become light and variable tuesday afternoon 
into wednesday morning, as a weak surface ridge passes over the 
lake. similar winds are expected wednesday, before southerly 
return thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-050315-
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-
443 pm cdt mon may 4 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 15 to 25 kt veering to northwest 10 to
20 kt. chance of rain showers and slight chance of thunderstorms
this evening, then chance of rain showers overnight. waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.tuesday...northwest winds 10 to 15 kt veering to east. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday night...south winds 5 to 10 kt veering to northwest.
waves 1 to 2 ft. 
.wednesday...northwest winds 10 to 15 kt becoming north. waves
1 to 2 ft. 
.wednesday night...south winds 5 to 10 kt veering to west. waves
1 to 2 ft. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 042143 aaa
glflm 
expires:202605050315;;019827

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
443 pm cdt mon may 4 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...

gusty southwesterly winds will linger until early this evening, 
ahead of an approaching cold front. the cold front is in 
association with low pressure of 28.9 inches over north central 
ontario, which will track northeast toward james bay through 
tuesday. 

as this occurs, the cold front will sink southeast over lake 
michigan through this evening and clear the lake tonight, shifting
winds to northwesterly. scattered storms may occur along the 
front, supportive of gusty winds.

west to northwest winds then persist through the first half of 
tuesday. winds will become light and variable tuesday afternoon 
into wednesday morning, as a weak surface ridge passes over the 
lake. similar winds are expected wednesday, before southerly 
return thursday.


lmz261-362-364-366-563-565-567-868-050315-
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-
443 pm cdt mon may 4 2026

sheboygan wi to pentwater mi north...

.tonight...southwest to west winds 15 to 25 kt early, veering 
northwest and diminishing to 10 to 20 kt. slight chance of rain 
showers this evening. waves 4 to 7 ft occasionally to 9 ft 
subsiding to 2 to 4 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest 10 to 15 kt.
waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt veering to north
5 to 10 kt. waves 1 to 2 ft. 
.wednesday...northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. waves 1 to 2 ft. 
.wednesday night...southwest winds 10 to 15 kt veering to north.
waves 1 to 2 ft. 
.thursday...southwest winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday...west winds 10 to 15 kt becoming southwest. waves 2 to
4 ft.  

$$

fzus63 kmkx 041934
glflm 
expires:202605050315;;015017

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
234 pm cdt mon may 4 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...

gusty southerly to southwesterly winds will persist this
afternoon ahead of an approaching cold front. a gale warning
remains in effect over the northern third of the lake through 4pm
cdt this afternoon. 

this cold front is in association with low pressure of 28.9 
inches over north central ontario, which will track northeast 
toward james bay through tuesday. as this occurs, the cold front 
will sink southeast over lake michigan through this afternoon and 
clear the lake tonight, ending gales and changing winds to
northwesterly. some scattered storms may occur along the front,
supportive of gusty winds.

west to northwest winds then persist through tonight through the
first half of tuesday, with winds becoming light and variable
tuesday afternoon into wednesday morning as a weak surface ridge
passes over the lake. similar winds are expected wednesday, before
southerly return thursday.


lmz261-362-364-563-050315-
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 rock island passage to sturgeon bay wi-
234 pm cdt mon may 4 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect until 4 pm cdt this afternoon...

.tonight...northwest winds 15 to 25 kt becoming west 10 to 20 kt.
slight chance of rain showers this evening. waves 4 to 7 ft
occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest 10 to 15 kt.
waves 1 to 3 ft. 
.tuesday night...west winds 10 to 15 kt becoming northwest 5 to
10 kt. waves 1 to 2 ft. 
.wednesday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft. 
.wednesday night...west winds 10 to 15 kt veering to northeast
less than 10 kt overnight. waves 1 to 2 ft. 
.thursday...southwest winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...southwest winds 5 to 10 kt becoming west. waves
1 to 2 ft. 
.friday...west winds 10 to 15 kt becoming southwest. waves 1 to
2 ft. 
.saturday...west winds 10 to 15 kt becoming southwest. waves 1 to
2 ft.  

$$

fzus63 kmkx 041934
glflm 
expires:202605050315;;015018

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
234 pm cdt mon may 4 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...

gusty southerly to southwesterly winds will persist this
afternoon ahead of an approaching cold front. a gale warning
remains in effect over the northern third of the lake through 4pm
cdt this afternoon. 

this cold front is in association with low pressure of 28.9 
inches over north central ontario, which will track northeast 
toward james bay through tuesday. as this occurs, the cold front 
will sink southeast over lake michigan through this afternoon and 
clear the lake tonight, ending gales and changing winds to
northwesterly. some scattered storms may occur along the front,
supportive of gusty winds.

west to northwest winds then persist through tonight through the
first half of tuesday, with winds becoming light and variable
tuesday afternoon into wednesday morning as a weak surface ridge
passes over the lake. similar winds are expected wednesday, before
southerly return thursday.


lmz366-565-567-868-050315-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
234 pm cdt mon may 4 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

.tonight...west winds 15 to 25 kt becoming northwest late this
evening, then becoming north 10 to 20 kt after midnight becoming
northwest 10 to 15 kt late. chance of sprinkles this evening.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday...northwest winds 10 to 15 kt backing to southwest.
waves 1 to 3 ft. 
.tuesday night...southwest winds 5 to 10 kt veering to north.
waves 1 to 2 ft. 
.wednesday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft. 
.wednesday night...southwest winds 5 to 10 kt veering to
northwest. waves 1 ft or less. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south. waves 1 to
3 ft. 
.saturday...west winds 10 to 15 kt becoming south. waves 2 to
4 ft.  

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015647

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz264-050800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt mon may 4 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...west gales to 35 knots. waves 6 to 9 feet
occasionally to 11 feet. 
.tonight...west winds 20 to 30 knots becoming northwest 15 to
25 knots after midnight, then backing west late. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015648

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz265-050800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt mon may 4 2026

.late this afternoon...west winds to 30 knots with a few gale
force gusts to 35 knots possible. waves 3 to 6 feet occasionally
to 8 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight, then backing west late. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots backing west. waves
calm to 2 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015645

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz162-050800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon may 4 2026 /301 pm cdt mon may 4 2026/

.late this afternoon...west winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015650

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz267-050800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt mon may 4 2026

.late this afternoon...west 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...west winds 20 to 30 knots. waves building to 4 to
8 feet occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...west winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.wednesday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...west winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots. waves building to 1 to
3 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015649

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz266-050800-
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 mon may 4 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...west winds 20 to 30 knots. waves 6 to
9 feet occasionally to 11 feet. 
.tonight...west winds 20 to 30 knots. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday night...west winds 15 to 25 knots becoming northwest
10 to 20 knots late. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots veering northwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202605050800;;015646

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon may 4 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.1 inch low over far-northeast ontario will lift to james bay at 
29.2 inches by tuesday morning as 30.2 inch ridging builds east of 
the canadian rockies. the low continues lifting into far northern 
quebec through wednesday as high pressure over the canadian prairie 
splits and moves to the canadian four corners and the southern 
plains at 30.0 inches and 30.2 inches respectively. by thursday 
afternoon, lake superior will be between a 29.5 inch low over hudson 
bay, a 29.4 inch low over the mouth of the st lawrence river, a low 
of 29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows will work to pass a 29.8 
inch trough over lake superior thursday night into friday, with the 
lows consolidating over quebec and the canadian maritimes by 
saturday morning, leaving remnant 29.8 inch troughing over lake 
superior.



lsz263-050800-
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 mon may 4 2026

.late this afternoon...west winds 20 to 30 knots. waves 5 to
8 feet occasionally to 10 feet. 
.tonight...west winds 20 to 30 knots becoming northwest 15 to
25 knots after midnight, then becoming west 10 to 20 knots late.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$