fzus61 kbuf 132010
glflo 
expires:202604140300;;314502

open lake forecast for lake ontario
national weather service buffalo ny
410 pm edt mon apr 13 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 
tuesday morning before weakening across the saint lawrence valley 
tuesday night. another 29.6 inch low will move into the central 
great lakes wednesday night before reaching southern quebec thursday 
night. a 30.0 inch high is then forecast to build from the central 
great lakes friday to the lower great lakes saturday.


loz062-140300-
lake ontario open waters from the niagara river to hamlin beach-
410 pm edt mon apr 13 2026

.tonight...west winds 15 to 20 knots becoming east and
diminishing to 5 to 10 knots. waves 2 to 4 feet subsiding to
1 foot or less. 
.tuesday...southeast winds 10 to 15 knots becoming southwest
15 to 20 knots. showers with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 1 to 2 feet building to 3 to 5 feet. 
.tuesday night...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. a chance of showers and thunderstorms in the
evening, then showers with a chance of thunderstorms overnight.
waves 3 to 5 feet subsiding to 1 to 2 feet. 
.wednesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. showers with a chance of thunderstorms in the morning,
then showers likely in the afternoon. waves 1 to 2 feet. 
.wednesday night...southwest winds 15 to 20 knots becoming south
and diminishing to 5 to 10 knots. showers. waves 1 to 2 feet. 
.thursday...south winds 10 to 15 knots becoming southwest.
showers. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming east. a chance of
showers during the day. waves 1 to 3 feet subsiding to 1 foot or
less. 
.saturday...southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. showers likely. waves 1 to 3 feet
building to 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 132010
glflo 
expires:202604140300;;314503

open lake forecast for lake ontario
national weather service buffalo ny
410 pm edt mon apr 13 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 
tuesday morning before weakening across the saint lawrence valley 
tuesday night. another 29.6 inch low will move into the central 
great lakes wednesday night before reaching southern quebec thursday 
night. a 30.0 inch high is then forecast to build from the central 
great lakes friday to the lower great lakes saturday.


loz063>065-140300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
410 pm edt mon apr 13 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131954
glfle 
expires:202604140215;;313214

open lake forecast for lake erie
national weather service cleveland oh
354 pm edt mon apr 13 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 stalled frontal boundary lingers across the central great lakes
through midweek. several waves of low pressure will track along 
this boundary including low pressure of 29.50 inches on thursday. 
a ridge averaging 30.00 inches will be over the lake on friday. 
another low pressure 29.50 inches will track through the northern 
great lakes on saturday. 


lez162>165-140215-
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-
354 pm edt mon apr 13 2026

.tonight...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a slight chance of showers and thunderstorms early,
then a chance of showers with a slight chance of thunderstorms. a
chance of showers and thunderstorms late. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers and thunderstorms in the morning,
then a slight chance of showers and thunderstorms early in the
afternoon. a chance of showers and thunderstorms late. waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. a chance of showers and thunderstorms in the
evening, then showers with a chance of thunderstorms overnight.
waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers. waves 1 to 3 feet. 
.wednesday night...southwest winds 10 to 15 knots. showers with a
chance of thunderstorms in the evening, then showers overnight.
waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots. showers likely during
the day, then a chance of showers thursday night. waves 1 to
3 feet. 
.friday...west winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.saturday...south winds 15 to 25 knots becoming west. showers
likely during the day, then a chance of showers saturday night.
waves 2 to 4 feet building to 3 to 5 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131954
glfle 
expires:202604140215;;313215

open lake forecast for lake erie
national weather service cleveland oh
354 pm edt mon apr 13 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 stalled frontal boundary lingers across the central great lakes
through midweek. several waves of low pressure will track along 
this boundary including low pressure of 29.50 inches on thursday. 
a ridge averaging 30.00 inches will be over the lake on friday. 
another low pressure 29.50 inches will track through the northern 
great lakes on saturday. 


lez061-166>169-140215-
ripley to buffalo ny extending from 5nm 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-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-
354 pm edt mon apr 13 2026

.tonight...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of showers with a slight chance of
thunderstorms late this evening. a slight chance of showers and
thunderstorms after midnight, then a chance of showers and
thunderstorms late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely with a chance of thunderstorms early,
then a chance of showers with a slight chance of thunderstorms
late in the morning. a chance of showers and thunderstorms in the
afternoon. waves 2 to 4 feet. 
.tuesday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. a chance of showers and thunderstorms in the
evening, then showers with a chance of thunderstorms overnight.
waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers with a chance of thunderstorms in the morning,
then showers in the afternoon. waves 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming south.
showers with a chance of thunderstorms. waves 1 to 2 feet. 
.thursday...southwest winds 10 to 15 knots. showers likely during
the day, then a chance of showers thursday night. waves 1 to
3 feet. 
.friday...west winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming southwest.
showers likely. waves 2 to 4 feet building to 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 131950
glfsc 
expires:202604140400;;313058

lake st clair forecast
national weather service detroit/pontiac mi
350 pm edt mon apr 13 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...several disturbances ripple along a stalled warm front
this week, leading to multiple periods of showers and
thunderstorms especially overnight. a few of these storms may be
strong to severe.


lcz460-140400-
lake st clair-
350 pm edt mon apr 13 2026

.tonight...southwest winds 5 to 10 knots backing to the south late
in the evening...then increasing to 10 to 15 knots after midnight.
partly cloudy this evening becoming mostly cloudy. a chance of light
showers in the evening. a chance of thunderstorms. light showers
likely after midnight. waves 2 feet or less.
.tuesday...southwest winds 15 to 20 knots. partly sunny. light
showers likely and a chance of thunderstorms early in the morning. a
chance of showers and thunderstorms in the afternoon. waves 1 to 3
feet.
.tuesday night...southwest winds 10 to 15 knots. showers and a
chance of thunderstorms. waves 1 to 3 feet.
.wednesday...southwest winds 10 to 15 knots. showers early in the
morning...then a chance of light showers in the late morning and
early afternoon. rain showers early in the afternoon. waves 2 feet
or less.
.wednesday night...south winds 5 to 10 knots increasing to 10 to 15
knots after midnight. showers and a chance of thunderstorms .. then
light showers likely after midnight. waves 2 feet or less.
.thursday...southwest winds 10 to 15 knots. mostly cloudy. light
showers likely in the morning...then light showers likely and a
chance of thunderstorms in the afternoon and evening. waves 1 to 3
feet.
.friday...southeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.
.saturday...southwest winds 20 to 25 knots. mostly cloudy with light
showers likely. waves 1 to 3 feet.

$$

fzus63 kdtx 131949
glflh 
expires:202604140400;;313056

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt mon apr 13 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...several disturbances ripple along a stalled warm front
this week, leading to multiple periods of showers and
thunderstorms especially overnight. a few of these storms may be
strong to severe.


lhz363-462>464-140400-
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-
349 pm edt mon apr 13 2026

.tonight...north winds 5 to 10 knots veering to the east by
midnight...then increasing to 10 to 15 knots early in the
morning. patchy fog. showers and a chance of thunderstorms after
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.tuesday...south winds 10 to 15 knots increasing to 15 to
20 knots late in the morning...then becoming southwest 10 to
15 knots in the afternoon. a chance of showers and thunderstorms
in the morning. patchy dense fog. waves 3 to 5 feet. 
.tuesday night...north winds 5 to 10 knots veering to the
southeast after midnight. showers and a chance of thunderstorms
in the evening...then showers likely and a chance of
thunderstorms after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.wednesday...north winds 5 to 10 knots. a chance of showers.
waves 1 to 3 feet. 
.wednesday night...north winds 5 to 10 knots veering to the east
in the late evening and overnight. a chance of showers and
thunderstorms in the evening...then showers likely after
midnight. waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots veering to the southwest
late in the afternoon...then veering to the southwest 10 to
15 knots late in the evening. showers likely...then a chance of
showers late in the evening. waves 2 to 4 feet. 
.friday...north winds 10 to 15 knots decreasing to 5 to 10 knots
until early evening...then becoming southeast 10 to 15 knots by
midnight. a chance of. waves 2 to 4 feet subsiding to 1 to 3 feet
early in the evening...then building to 4 to 6 feet by midnight.
waves occasionally around 8 feet. 
.saturday...south winds 20 to 25 knots decreasing to 15 to
20 knots early in the evening...then becoming southwest 20 to
25 knots by midnight. showers likely until afternoon. a chance of
showers . waves 5 to 7 feet. waves occasionally around 10 feet. 


$$

fzus63 kdtx 131949
glflh 
expires:202604140400;;313055

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt mon apr 13 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...several disturbances ripple along a stalled warm front
this week, leading to multiple periods of showers and
thunderstorms especially overnight. a few of these storms may be
strong to severe.


lhz361-362-140400-
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-
349 pm edt mon apr 13 2026

.tonight...north winds 5 to 10 knots veering to the east after
midnight...then increasing to 10 to 15 knots early in the
morning. showers and a chance of thunderstorms after midnight.
patchy fog after midnight. locally heavy rainfall possible after
midnight. waves 3 to 5 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.tuesday...east winds 10 to 15 knots becoming south 5 to 10 knots
late in the afternoon. a chance of showers in the morning. patchy
fog. waves 3 to 5 feet. 
.tuesday night...north winds 5 to 10 knots veering to the east in
the late evening and overnight. a chance of showers. 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...northeast winds 5 to 10 knots veering to the
east in the late evening and overnight. a chance of showers.
waves 1 to 3 feet. 
.thursday...east winds 10 to 15 knots veering to the southwest
late in the afternoon...then veering to the northwest late in the
evening. showers likely. a chance of showers late in the
afternoon. waves 2 to 4 feet. 
.friday...north winds 10 to 15 knots becoming northeast 5 to
10 knots in the late morning and early afternoon...then becoming
east 10 to 15 knots early in the evening becoming southeast 15 to
20 knots by midnight. a chance of. waves 2 to 4 feet building to
5 to 7 feet. waves occasionally around 10 feet. 
.saturday...southeast winds 20 to 25 knots with gusts to around
30 knots veering to the southwest with gusts to around 30 knots
by midnight. a chance of showers early in the morning...then
showers likely until early evening. a chance of rain and snow
showers by midnight. waves 6 to 9 feet. waves occasionally around
11 feet. 


$$

fzus63 kmkx 132026
glflm 
expires:202604140315;;315267

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
326 pm cdt mon apr 13 2026

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

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

.synopsis...

low pressure around 29.5 inches over nebraska will continue to
lift into the upper great lakes region this evening with a warm
front extending out ahead of it. will see shower and thunderstorm
activity along this boundary tonight as the low pressure lifts 
east-northeastward. expect light winds across the lake to vary
with the front and passing low. then expecting another a couple 
passing low pressure system to develop in the plains and track
across lake michigan again on tuesday and wednesday. each system
will bring a chance for showers and thunderstorms through the 
middle of the week. areas of dense fog will likely occur at times 
due to a relatively mild and humid airmass over the cold waters
paired with lighter winds.


lmz261-362-364-366-563-565-567-868-140315-
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-
326 pm cdt mon apr 13 2026

sheboygan wi to pentwater mi north...

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

.tonight...east winds 10 to 20 kt becoming southeast 15 to 25 kt.
patchy dense fog this evening, then areas of dense fog overnight.
rain showers with a chance of thunderstorms. waves 1 to 3 ft
building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt backing to south 10 to 15 kt.
patchy fog in the morning, then patchy dense fog in the
afternoon. slight chance of rain showers in the morning, then
slight chance of rain showers and thunderstorms in the afternoon.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. patchy dense fog in the evening. chance of rain showers.
waves 2 to 4 ft. 
.wednesday...northeast winds 5 to 10 kt. chance of rain showers
in the afternoon. waves 1 to 3 ft. 
.wednesday night...northeast winds 5 to 10 kt becoming east 10 to
15 kt. chance of rain showers in the evening, then rain showers
likely overnight. waves 1 to 3 ft. 
.thursday...east winds 10 to 15 kt backing to northwest. chance
of rain showers. waves 2 to 4 ft. 
.thursday night...north winds 10 to 15 kt becoming northeast.
waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt becoming southeast 10 to 20 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.saturday...south winds to 30 kt becoming southwest. rain showers
likely. waves 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmkx 132026
glflm 
expires:202604140315;;315268

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
326 pm cdt mon apr 13 2026

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

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

.synopsis...

low pressure around 29.5 inches over nebraska will continue to
lift into the upper great lakes region this evening with a warm
front extending out ahead of it. will see shower and thunderstorm
activity along this boundary tonight as the low pressure lifts 
east-northeastward. expect light winds across the lake to vary
with the front and passing low. then expecting another a couple 
passing low pressure system to develop in the plains and track
across lake michigan again on tuesday and wednesday. each system
will bring a chance for showers and thunderstorms through the 
middle of the week. areas of dense fog will likely occur at times 
due to a relatively mild and humid airmass over the cold waters
paired with lighter winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-140315-
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-
326 pm cdt mon apr 13 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt increasing to 30 kt late this
evening, then becoming south to 30 kt after midnight becoming
southwest late. patchy fog. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 4 to 7 ft occasionally
to 9 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. patchy fog in the morning, then patchy dense fog in the
afternoon. slight chance of rain showers in the morning, then
chance of rain showers and thunderstorms in the afternoon. waves
4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...south winds 10 to 20 kt becoming southwest. rain
showers with a chance of thunderstorms in the evening, then rain
showers likely overnight. waves 2 to 4 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. chance
of rain showers in the morning, then rain showers likely in the
afternoon. waves 2 to 4 ft. 
.wednesday night...southeast winds 10 to 15 kt becoming south
10 to 20 kt. rain showers with a chance of thunderstorms in the
evening, then rain showers likely with a chance of thunderstorms
overnight. waves 2 to 4 ft. 
.thursday...southwest winds 10 to 20 kt. rain showers likely.
waves 2 to 4 ft. 
.thursday night...northwest winds 10 to 15 kt becoming north.
waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt becoming southeast 10 to 20 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.saturday...south winds to 30 kt becoming southwest. rain showers
likely. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313475

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz266-140800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 pm edt mon apr 13 2026

.late this afternoon...east winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then backing northeast late. patchy fog. a slight
chance of thunderstorms through midnight. a chance of rain
showers. waves building to 1 to 3 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. patchy fog. a slight chance of rain showers. waves
subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight, then veering north late. a slight
chance of rain showers. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots backing north by mid
afternoon. a chance of rain showers. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots becoming east 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...southeast winds 20 to 30 knots becoming south gales to
40 knots. rain showers. waves building to 9 to 12 feet
occasionally to 15 feet. 
.saturday...west gales to 40 knots becoming northwest gales to
45 knots. a chance of rain and snow showers. waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 9 to
12 feet occasionally to 15 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313471

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt mon apr 13 2026 /300 pm cdt mon apr 13 2026/

.late this afternoon...east winds 5 to 15 knots. a slight chance
of rain showers. waves calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
patchy fog. a chance of rain showers. waves building to 2 to
4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. patchy fog. a chance of rain showers. waves
subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots backing north
after midnight, then veering northeast late. waves calm to
2 feet. 
.wednesday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...east winds 10 to 20 knots becoming west 20 to 30 knots.
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 winds 20 to 30 knots becoming northwest gales to
35 knots. a chance of rain showers. a chance of snow showers.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313476

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz267-140800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt mon apr 13 2026

.late this afternoon...west winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then backing northeast late. patchy fog. a chance
of rain showers. waves subsiding to calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. patchy fog through early afternoon. a
slight chance of rain showers through early afternoon. waves calm
to 2 feet. 
.tuesday night...north winds 5 to 15 knots backing west after
midnight, then veering northwest late. a slight chance of rain
showers after midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots backing north by mid
afternoon. a chance of rain showers. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots becoming southeast gales to
35 knots. a chance of rain showers. waves building to 7 to
10 feet occasionally to 13 feet. 
.saturday...west gales to 40 knots. rain showers likely. a chance
of snow showers. a chance of rain showers. waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 9 to
12 feet occasionally to 15 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313472

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz263-140800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 pm edt mon apr 13 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots backing northeast late.
patchy fog. a chance of rain showers. waves building to 2 to
4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. patchy fog. a chance of rain showers.
waves subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight, then veering northeast late.
waves subsiding to calm to 2 feet. 
.wednesday...northeast winds less than 10 knots increasing to
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...east winds 15 to 25 knots becoming southeast gales to
35 knots. a chance of rain showers, then rain showers. waves
building to 8 to 11 feet occasionally to 14 feet. 
.saturday...west gales to 35 knots becoming northwest gales to
40 knots. a chance of rain showers. a chance of snow showers.
waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313473

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz264-140800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt mon apr 13 2026

.late this afternoon...southeast winds less than 10 knots. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast late.
patchy fog. a chance of rain showers. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. patchy fog. a chance of
rain showers. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds less than 10 knots veering east by
mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots becoming east
10 to 20 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...east winds 15 to 25 knots becoming southeast gales to
35 knots. rain showers. waves building to 8 to 11 feet
occasionally to 14 feet. 
.saturday...west gales to 40 knots veering northwest. a chance of
rain showers. a chance of snow showers. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202604140800;;313474

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 13 2026

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

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

.synopsis...

a 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz265-140800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt mon apr 13 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then backing northeast late. patchy fog. a slight
chance of thunderstorms through midnight. rain showers likely.
waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots. patchy fog. waves calm
to 2 feet. 
.tuesday night...north winds 5 to 15 knots backing northwest
after midnight, then veering north late. a slight chance of rain
showers through midnight. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots backing north by mid
afternoon. a chance of rain showers. waves calm to 2 feet. 
.thursday night...east winds 10 to 20 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.friday...southeast winds 20 to 30 knots increasing to gales to
35 knots. rain showers. waves building to 6 to 9 feet
occasionally to 11 feet. 
.saturday...west gales to 35 knots becoming northwest gales to
40 knots. a chance of rain showers. a chance of snow showers.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 7 to 10 feet occasionally to 13 feet. 

$$