fzus61 kbuf 152003
glflo 
expires:202604160300;;424695

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed apr 15 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 29.6 inch low will move into the central great lakes 
tonight before reaching southern quebec thursday night, then drift 
off the new england coast by friday night. a 30.0 inch high is then 
forecast to build from the central great lakes friday to the lower 
great lakes saturday morning, then off the east coast saturday 
night. a 29.3 inch surface low to the north of lake superior 
saturday will deepen to 28.9 inches by sunday, with a trailing cold 
front crossing the lake saturday night. a 30.4 inch surface high 
will push from the plains to the upper ohio valley from sunday 
through monday.


loz062-160300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt wed apr 15 2026

.tonight...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms this evening, then showers with a chance of
thunderstorms after midnight. waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers in the morning, then showers likely
in the afternoon. waves 1 to 3 feet. 
.thursday night...southwest winds 15 to 20 knots becoming west
and diminishing to around 10 knots. showers likely in the
evening, then a chance of showers overnight. waves 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming southeast. a
chance of showers in the morning. waves 2 feet or less. 
.friday night...east winds 10 knots or less. waves 1 foot or
less. 
.saturday...southeast winds 10 to 15 knots becoming west 15 to
20 knots. showers likely. waves 2 feet or less building to 3 to
6 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. a chance
of rain and snow showers during the day, then a chance of rain
showers sunday night. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.monday...northwest winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
2 to 3 feet. waves occasionally around 9 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 152003
glflo 
expires:202604160300;;424696

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed apr 15 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 29.6 inch low will move into the central great lakes 
tonight before reaching southern quebec thursday night, then drift 
off the new england coast by friday night. a 30.0 inch high is then 
forecast to build from the central great lakes friday to the lower 
great lakes saturday morning, then off the east coast saturday 
night. a 29.3 inch surface low to the north of lake superior 
saturday will deepen to 28.9 inches by sunday, with a trailing cold 
front crossing the lake saturday night. a 30.4 inch surface high 
will push from the plains to the upper ohio valley from sunday 
through monday.


loz063>065-160300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed apr 15 2026

.tonight...south winds 5 to 10 knots. a chance of showers through
the early overnight, then showers likely late. waves 2 feet or
less. 
.thursday...south winds 5 to 10 knots becoming southwest.
showers. waves 2 feet or less. 
.thursday night...southwest winds 5 to 10 knots becoming west.
showers in the evening, then showers likely overnight. waves
2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming west. a chance
of showers in the morning. waves 2 feet or less. 
.friday night...northwest winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.saturday...southeast winds 15 to 25 knots becoming southwest.
showers likely. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.sunday...west winds to 30 knots becoming northwest. rain showers
likely during the day, then a chance of rain and snow showers
sunday night. waves 5 to 9 feet building to 7 to 10 feet. waves
occasionally around 13 feet. 
.monday...northwest winds 15 to 25 knots becoming west. waves
5 to 9 feet subsiding to 3 to 5 feet. waves occasionally around
11 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151940
glfle 
expires:202604160215;;423936

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt wed apr 15 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...
lake erie resides along the northwestern flank of a high 
pressure ridge averaging 29.80 inches before a cold front sweeps 
southeastward across the lake thursday night. behind the front, a 
separate ridge averaging 30.00 inches builds from the northern great 
lakes through friday. during friday night through saturday morning, 
the ridge should exit eastward and allow a warm front to sweep 
northward across lake erie. a cold front should then sweep eastward 
across lake erie saturday evening through saturday night.
behind the cold front, a trough averaging 29.90 inches should linger 
over lake erie through sunday before a ridge averaging 30.30 inches 
builds from the west by monday.


lez162>165-160215-
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-
340 pm edt wed apr 15 2026

...severe thunderstorm watch 120 in effect until 9 pm edt this
evening...

.tonight...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms early, then showers with a chance of
thunderstorms from late evening on. waves 1 to 2 feet. 
.thursday...south winds 10 to 15 knots becoming southwest. a
chance of showers and thunderstorms early, then showers likely
with a slight chance of thunderstorms. showers likely with a
chance of thunderstorms late. waves 1 to 2 feet. 
.thursday night...west winds 5 to 15 knots becoming northwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 2 feet or less. 
.friday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.friday night...east winds 5 to 15 knots becoming southeast. a
chance of showers overnight. waves 2 feet or less. 
.saturday...south winds 15 to 20 knots becoming west. showers
with a chance of thunderstorms during the day, then a chance of
showers saturday night. waves 2 to 4 feet building to 3 to
6 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. waves
3 to 6 feet. 
.monday...northwest winds 15 to 20 knots becoming south. waves
3 to 5 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151940
glfle 
expires:202604160215;;423937

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt wed apr 15 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...
lake erie resides along the northwestern flank of a high 
pressure ridge averaging 29.80 inches before a cold front sweeps 
southeastward across the lake thursday night. behind the front, a 
separate ridge averaging 30.00 inches builds from the northern great 
lakes through friday. during friday night through saturday morning, 
the ridge should exit eastward and allow a warm front to sweep 
northward across lake erie. a cold front should then sweep eastward 
across lake erie saturday evening through saturday night.
behind the cold front, a trough averaging 29.90 inches should linger 
over lake erie through sunday before a ridge averaging 30.30 inches 
builds from the west by monday.


lez166>169-160215-
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-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-
340 pm edt wed apr 15 2026

...severe thunderstorm watch 120 in effect until 9 pm edt this
evening...

.tonight...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms early, then showers with a chance of thunderstorms
from late evening on. waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots. a chance of showers
with a slight chance of thunderstorms early, then showers likely
with a slight chance of thunderstorms. showers likely with a
chance of thunderstorms late. waves 1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots becoming
northwest. showers likely with a chance of thunderstorms in the
evening, then a chance of showers overnight. waves 1 to 2 feet. 
.friday...northwest winds 10 knots or less becoming north. waves
1 foot or less. 
.friday night...east winds 10 knots or less becoming southeast
10 to 15 knots. waves 2 feet or less. 
.saturday...south winds 15 to 20 knots becoming west. showers
with a chance of thunderstorms during the day, then a chance of
showers saturday night. waves 2 to 4 feet building to 3 to
6 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. a chance
of rain showers during the day. waves 4 to 7 feet subsiding to
3 to 6 feet. waves occasionally around 9 feet. 
.monday...northwest winds 15 to 20 knots becoming south. waves
3 to 5 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151940
glfle 
expires:202604160215;;423938

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt wed apr 15 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...
lake erie resides along the northwestern flank of a high 
pressure ridge averaging 29.80 inches before a cold front sweeps 
southeastward across the lake thursday night. behind the front, a 
separate ridge averaging 30.00 inches builds from the northern great 
lakes through friday. during friday night through saturday morning, 
the ridge should exit eastward and allow a warm front to sweep 
northward across lake erie. a cold front should then sweep eastward 
across lake erie saturday evening through saturday night.
behind the cold front, a trough averaging 29.90 inches should linger 
over lake erie through sunday before a ridge averaging 30.30 inches 
builds from the west by monday.


lez061-160215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
340 pm edt wed apr 15 2026

.tonight...southwest winds around 10 knots. showers with a chance
of thunderstorms. waves 1 to 2 feet. 
.thursday...southwest winds around 10 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 1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots becoming west.
showers likely with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 to 3 feet. 
.friday...west winds 10 knots or less becoming northwest. waves
around 1 foot. 
.friday night...light and variable winds becoming southeast 5 to
10 knots. waves 1 foot or less. 
.saturday...south winds 10 to 15 knots becoming west. a chance of
showers during the day, then showers likely saturday night. waves
2 feet or less building to 2 to 4 feet. 
.sunday...west winds 10 to 15 knots becoming northwest. a chance
of rain and snow showers during the day. waves 3 to 5 feet. 
.monday...northwest winds 5 to 15 knots becoming south. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 151948
glflh 
expires:202604160400;;424143

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 pm edt wed apr 15 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...stalled frontal boundary over the central great lakes
will lead to multiple episodes of showers and thunderstorms over
the next 2 days. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lhz361-362-160400-
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-
348 pm edt wed apr 15 2026

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


$$

fzus63 kdtx 151948
glfsc 
expires:202604160400;;424146

lake st clair forecast
national weather service detroit/pontiac mi
348 pm edt wed apr 15 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...stalled frontal boundary over the central great lakes
will lead to multiple episodes of showers and thunderstorms over
the next 2 days. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lcz460-160400-
lake st clair-
348 pm edt wed apr 15 2026

.tonight...southwest winds 5 to 10 knots increasing to 10 to 15
knots after midnight. showers likely in the evening. a chance of
thunderstorms. rain showers after midnight. waves 2 feet or less.
.thursday...southwest winds 10 to 15 knots. light showers likely in
the morning...then showers and a chance of thunderstorms in the
afternoon. waves 2 feet or less.
.thursday night...west winds 10 to 15 knots becoming north 5 to 10
knots in the late evening and overnight. partly cloudy. a chance of
showers and thunderstorms early in the evening. waves 2 feet or
less.
.friday...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming southeast 5 to 10 knots early in
the afternoon. partly sunny. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots increasing to 10 to 15
knots in the late evening and overnight. partly cloudy becoming
mostly cloudy. a chance of light showers after midnight. waves 2
feet or less.
.saturday...south winds 15 to 20 knots becoming southwest 20 to 25
knots in the afternoon...then becoming west 15 to 20 knots in the
evening. becoming partly cloudy in the evening. light showers. a
chance of thunderstorms in the afternoon and evening. light showers
likely in the evening. waves 1 to 3 feet building to 2 to 4 feet in
the afternoon...then subsiding to 1 to 3 feet in the evening.
.sunday...northwest winds 20 to 25 knots. partly cloudy. waves 1 to
3 feet.
.monday...south winds 15 to 20 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 151948
glflh 
expires:202604160400;;424144

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 pm edt wed apr 15 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...stalled frontal boundary over the central great lakes
will lead to multiple episodes of showers and thunderstorms over
the next 2 days. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lhz363-462>464-160400-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
348 pm edt wed apr 15 2026

.tonight...southeast winds 5 to 10 knots. a chance of showers and
thunderstorms in the evening...then showers likely and a chance
of thunderstorms after midnight. waves 2 feet or less. 
.thursday...south winds 5 to 10 knots. a chance of showers. waves
1 to 3 feet. 
.thursday night...north winds 5 to 10 knots. waves 2 feet or
less. 
.friday...north winds 5 to 10 knots veering to the east early in
the afternoon. waves 2 feet or less. 
.friday night...east winds 5 to 10 knots becoming southeast 10 to
15 knots by midnight...then becoming south 15 to 20 knots after
midnight. a chance of showers after midnight. waves 1 to 3 feet
building to 3 to 5 feet in the late evening and overnight. 
.saturday...south winds 15 to 20 knots veering to the west late
in the afternoon. a chance of showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.sunday...west winds 20 to 25 knots becoming northwest 15 to
20 knots early in the evening...then increasing to 20 to 25 knots
by midnight. waves 8 to 12 feet. waves occasionally around
15 feet. 
.monday...northwest winds 20 to 25 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
northwest 10 to 15 knots early in the evening becoming south
15 to 20 knots by midnight. waves 8 to 12 feet subsiding to 4 to
6 feet . waves occasionally around 15 feet. 


$$

fzus63 kmkx 152036
glflm 
expires:202604160315;;426455

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
336 pm cdt wed apr 15 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

a stationary front will remain parked over the middle third of
the lake this afternoon, slowly sinking south to the southern 
end of the lake by noon thursday. a marine dense fog advisory 
continues until thursday morning while this front lingers. 
winds will remain southerly south of the front and modestly 
breezy, while winds north of the front will remain light and 
variable to northerly during this time. the front will then 
clear the lake thursday afternoon and northerly winds will 
prevail over whole lake. winds will become light and variable 
briefly thursday night as a weak ridge passes over the lake, 
with winds then becoming southerly and breezy friday ahead of 
low pressure of 29.6 inches approaching from the west. gusty
northwest winds then return following a cold front friday night. 

additional thunderstorms are forecast over the southern 
third of lake michigan this evening into tonight. a few storms 
could be severe with large hail being the primary concern. 
additional storms are possible friday into saturday, with a few 
stronger storms possible.


lmz080-669-671-673-675-777-779-870-872-874-876-878-160315-
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-
336 pm cdt wed apr 15 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 7 am cdt thursday...

.tonight...south winds 10 to 20 kt becoming southwest 15 to
25 kt. patchy dense fog this evening, then areas of dense fog
overnight. rain showers likely with a chance of thunderstorms
this evening, then chance of rain showers and thunderstorms
overnight. waves 1 to 3 ft. 
.thursday...west winds 10 to 20 kt becoming north 10 to 15 kt.
areas of dense fog in the morning, then patchy fog in the
afternoon. chance of rain showers and slight chance of
thunderstorms in the morning, then slight chance of rain showers
in the afternoon. waves 1 to 3 ft. 
.thursday night...north winds 10 to 15 kt veering to south.
patchy fog in the evening. waves 1 to 3 ft. 
.friday...southeast winds 10 to 15 kt increasing to 15 to 25 kt
in the afternoon. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.friday night...southeast winds to 30 kt becoming south. rain
showers likely with a chance of thunderstorms in the evening,
then rain showers with a chance of thunderstorms overnight. waves
5 to 8 ft occasionally to 10 ft. 
.saturday...west winds 15 to 25 kt. rain showers in the morning,
then chance of rain showers in the afternoon. waves 5 to 8 ft
occasionally to 10 ft. 
.saturday night...west winds to 30 kt. waves 6 to 9 ft
occasionally to 12 ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft. 
.monday...east winds 10 to 20 kt becoming southeast. waves 3 to
5 ft.  

$$

fzus63 kmkx 152036
glflm 
expires:202604160315;;426454

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
336 pm cdt wed apr 15 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

a stationary front will remain parked over the middle third of
the lake this afternoon, slowly sinking south to the southern 
end of the lake by noon thursday. a marine dense fog advisory 
continues until thursday morning while this front lingers. 
winds will remain southerly south of the front and modestly 
breezy, while winds north of the front will remain light and 
variable to northerly during this time. the front will then 
clear the lake thursday afternoon and northerly winds will 
prevail over whole lake. winds will become light and variable 
briefly thursday night as a weak ridge passes over the lake, 
with winds then becoming southerly and breezy friday ahead of 
low pressure of 29.6 inches approaching from the west. gusty
northwest winds then return following a cold front friday night. 

additional thunderstorms are forecast over the southern 
third of lake michigan this evening into tonight. a few storms 
could be severe with large hail being the primary concern. 
additional storms are possible friday into saturday, with a few 
stronger storms possible.


lmz261-362-364-366-563-565-567-868-160315-
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-
336 pm cdt wed apr 15 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 7 am cdt thursday...

.tonight...east winds 5 to 10 kt becoming northeast. areas of
dense fog. chance of rain showers and slight chance of
thunderstorms. waves 1 to 2 ft. 
.thursday...north winds 10 to 15 kt. chance of rain showers and
slight chance of thunderstorms in the morning. areas of dense fog
in the morning, then patchy fog in the afternoon. waves 1 to
3 ft. 
.thursday night...northwest winds 5 to 10 kt veering to
southeast. patchy fog in the evening. waves 1 to 2 ft subsiding
to 1 ft or less. 
.friday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.friday night...south winds to 30 kt. rain showers. waves 5 to
8 ft occasionally to 10 ft. 
.saturday...west winds to 30 kt diminishing to 15 to 25 kt. rain
showers in the morning, then chance of rain showers in the
afternoon. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft. 
.saturday night...west winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
.sunday...northwest winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft. 
.monday...west winds 10 to 20 kt becoming south. waves 3 to 5 ft.
 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424458

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt wed apr 15 2026

...dense fog advisory in effect until 11 am edt thursday...

.late this afternoon...north winds less than 10 knots. patchy
dense fog. waves calm to 2 feet. 
.tonight...north winds less than 10 knots backing southwest after
midnight, then veering west late. areas of dense fog. waves calm
to 2 feet. 
.thursday...southwest winds less than 10 knots becoming south
5 to 15 knots late. areas of dense fog through early afternoon,
then patchy fog by mid afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots increasing to
15 to 25 knots. patchy fog through midnight. waves calm to
2 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of rain showers by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday night...south winds 20 to 30 knots veering northwest
after midnight. rain showers through midnight, then a chance of
rain showers, possibly mixed with snow after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.saturday...west gales to 35 knots. waves building to 6 to 9 feet
occasionally to 11 feet. 
.saturday night...northwest gales to 35 knots. waves building to
9 to 12 feet occasionally to 15 feet. 
.sunday...northwest gales to 35 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet. 
.monday...south winds 10 to 20 knots increasing to 20 to
30 knots. waves subsiding to 1 to 3 feet, then building to 4 to
7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424459

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt wed apr 15 2026

...dense fog advisory in effect until 11 am edt thursday...

.late this afternoon...north winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots veering southeast after
midnight, then backing north late. areas of dense fog. waves calm
to 2 feet. 
.thursday...north winds 5 to 15 knots veering east late. areas of
dense fog through early afternoon, then patchy fog by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. patchy fog through midnight. waves
calm to 2 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a slight chance of rain showers by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday night...south gales to 35 knots veering west after
midnight. rain showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 40 knots. a chance of rain showers
through early afternoon. a chance of snow showers. waves building
to 7 to 10 feet occasionally to 13 feet. 
.saturday night...northwest gales to 40 knots. a chance of snow
showers. waves building to 9 to 12 feet occasionally to 15 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves subsiding to 2 to 4 feet. 
.monday...southeast winds 15 to 25 knots becoming south 20 to
30 knots. waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424460

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz266-160800-
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 wed apr 15 2026

...dense fog advisory in effect until 11 am edt thursday...

.late this afternoon...north winds 5 to 15 knots. areas of dense
fog. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots backing west after midnight,
then veering northwest late. a slight chance of rain showers
through midnight. areas of dense fog. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north late.
areas of dense fog through early afternoon, then patchy fog by
mid afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots increasing to
15 to 25 knots. patchy fog through midnight. waves calm to
2 feet. 
.friday...southeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of rain showers by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday night...south gales to 35 knots veering west after
midnight. rain showers. waves building to 4 to 8 feet
occasionally to 10 feet. 
.saturday...west gales to 40 knots. a chance of rain showers
through early afternoon. a chance of snow showers. waves building
to 10 to 14 feet occasionally to 18 feet. 
.saturday night...west gales to 40 knots veering northwest after
midnight. a chance of snow showers. waves building to 12 to
17 feet occasionally to 21 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday...south winds 15 to 25 knots increasing to gales to
35 knots. waves subsiding to 2 to 4 feet, then building to 5 to
8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424461

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt wed apr 15 2026

...dense fog advisory in effect until 11 am edt thursday...

.late this afternoon...west winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. a
slight chance of rain showers through midnight. areas of dense
fog. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest in the
afternoon. areas of dense fog through early afternoon, then
patchy fog by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.friday night...southeast gales to 35 knots veering south after
midnight. rain showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 40 knots. a chance of rain and snow
showers. waves building to 10 to 14 feet occasionally to 18 feet.
.saturday night...west gales to 35 knots becoming northwest gales
to 40 knots after midnight. a chance of snow showers. waves
building to 12 to 17 feet occasionally to 21 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday...south winds 10 to 20 knots increasing to 20 to
30 knots. waves subsiding to 1 to 3 feet, then building to 4 to
7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424456

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed apr 15 2026 /301 pm cdt wed apr 15 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/
thursday...

.late this afternoon...northeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...northeast winds less than 10 knots increasing to 5 to
15 knots late. areas of dense fog. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming east 10 to
20 knots late. areas of dense fog through early afternoon. waves
calm to 2 feet. 
.thursday night...northeast winds 10 to 20 knots. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. rain showers likely and a chance of
thunderstorms by mid afternoon. waves building to 2 to 4 feet. 
.friday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. rain showers likely through
midnight. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming west 10 to 20 knots.
waves building to 2 to 4 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202604160800;;424457

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed apr 15 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...

weak ridging of around 29.8 inches persists over lake superior 
tonight through thursday and into friday, before troughing averaging 
29.5 inches moves across the lake friday evening and saturday 
morning. ridging builds into lake superior for the remainder of 
saturday and throughout sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to troughing monday evening as a low 
swings southeast through ontario toward james bay, decreasing to 
around 29.6 by monday evening.



lsz263-160800-
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 wed apr 15 2026

...dense fog advisory in effect until 11 am edt thursday...

.late this afternoon...northeast winds less than 10 knots. patchy
dense fog. waves calm to 2 feet. 
.tonight...northeast winds less than 10 knots veering east after
midnight. areas of dense fog. waves calm to 2 feet. 
.thursday...south winds less than 10 knots becoming southwest
5 to 15 knots in the afternoon, then backing east late. areas of
dense fog through early afternoon, then patchy fog by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers and a slight chance of
thunderstorms by mid afternoon. waves building to 2 to 4 feet. 
.friday night...west winds 20 to 30 knots. rain showers through
midnight, then a chance of rain and snow showers after midnight.
waves building to 4 to 7 feet occasionally to 9 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet. 
.saturday night...northwest gales to 35 knots. waves building to
8 to 11 feet occasionally to 14 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.monday...south winds 10 to 20 knots increasing to 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$