fzus61 kbuf 122009
glflo 
expires:202604130300;;261053

open lake forecast for lake ontario
national weather service buffalo ny
409 pm edt sun apr 12 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 30.5 inch area of high pressure will slide off the 
east coast tonight. a 29.3 inch low over the upper midwest this 
evening, will move quickly northeastward to near james bay tonight. 
this low will strengthen to 29.2 inches while continuing to trek 
northeast into northern quebec monday, with a trailing cold front 
stalling near the lake monday through tuesday. a 29.5 inch surface 
low advancing through the upper great lakes wednesday will lift this 
frontal boundary northward into canada. this 29.5 inch low will 
continue northeast into southern quebec on thursday while dragging 
an attendant cold front across the lake. a 30.2 inch high will then 
build over the lower great lakes on friday.


loz062-130300-
lake ontario open waters from the niagara river to hamlin beach-
409 pm edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 122009
glflo 
expires:202604130300;;261054

open lake forecast for lake ontario
national weather service buffalo ny
409 pm edt sun apr 12 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 30.5 inch area of high pressure will slide off the 
east coast tonight. a 29.3 inch low over the upper midwest this 
evening, will move quickly northeastward to near james bay tonight. 
this low will strengthen to 29.2 inches while continuing to trek 
northeast into northern quebec monday, with a trailing cold front 
stalling near the lake monday through tuesday. a 29.5 inch surface 
low advancing through the upper great lakes wednesday will lift this 
frontal boundary northward into canada. this 29.5 inch low will 
continue northeast into southern quebec on thursday while dragging 
an attendant cold front across the lake. a 30.2 inch high will then 
build over the lower great lakes on friday.


loz063>065-130300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
409 pm edt sun apr 12 2026

.tonight...southeast winds 15 to 25 knots becoming south. showers
likely early, then a chance of showers late this evening. waves
1 to 3 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.monday...southwest winds 15 to 25 knots. showers in the morning,
then a chance of showers early in the afternoon. waves 3 to
6 feet. 
.monday night...southwest winds 15 to 20 knots becoming south and
diminishing to less than 10 knots overnight. a chance of showers.
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. showers likely in the morning, then showers with a
chance of thunderstorms in the afternoon. waves 1 to 3 feet. 
.tuesday night...southwest winds 10 to 15 knots. showers with a
chance of thunderstorms. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.wednesday...southwest winds 5 to 15 knots becoming south.
showers likely. waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. showers likely. waves 1 to 3 feet. 
.friday...west winds 15 to 20 knots becoming south 5 to 15 knots.
waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 122000
glfle 
expires:202604130215;;260240

open lake forecast for lake erie
national weather service cleveland oh
400 pm edt sun apr 12 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...
low pressure of 29.40 inches will track across the upper great 
lakes towards hudson bay tonight, leaving a stalled frontal 
boundary across the central great lakes. several waves of low 
pressure will track along this boundary through mid-week including
low pressure of 29.50 inches on thursday. a ridge averaging 30.00
inches will be over the lake on friday. 


lez061-166>169-130215-
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-
400 pm edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 122000
glfle 
expires:202604130215;;260239

open lake forecast for lake erie
national weather service cleveland oh
400 pm edt sun apr 12 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...
low pressure of 29.40 inches will track across the upper great 
lakes towards hudson bay tonight, leaving a stalled frontal 
boundary across the central great lakes. several waves of low 
pressure will track along this boundary through mid-week including
low pressure of 29.50 inches on thursday. a ridge averaging 30.00
inches will be over the lake on friday. 


lez162>165-130215-
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-
400 pm edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121957
glfsc 
expires:202604130400;;260103

lake st clair forecast
national weather service detroit/pontiac mi
357 pm edt sun apr 12 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...a warm front lifts across the region today, then
stalls across the northern great lakes through much of the week.
multiple passing disturbances bring rounds of showers,
thunderstorms, and gusty winds through friday.


lcz460-130400-
lake st clair-
357 pm edt sun apr 12 2026

...small craft advisory in effect from 10 pm edt this evening
through monday morning...

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

$$

fzus63 kdtx 121957
glflh 
expires:202604130400;;260054

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt sun apr 12 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...a warm front lifts across the region today, then
stalls across the northern great lakes through much of the week.
multiple passing disturbances bring rounds of showers,
thunderstorms, and gusty winds through friday.


lhz361-362-130400-
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-
357 pm edt sun apr 12 2026

.tonight...southeast winds 15 to 20 knots becoming south 20 to
25 knots with gusts to around 30 knots in the late evening and
overnight. showers and a chance of thunderstorms in the evening...
then a chance of showers after midnight. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots in the afternoon. a chance of showers in the morning.
waves 5 to 7 feet subsiding to 3 to 5 feet late in the afternoon.
waves occasionally around 10 feet. 
.monday night...north winds 5 to 10 knots becoming east 10 to
15 knots after midnight. a chance of thunderstorms after
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.tuesday...east winds 15 to 20 knots decreasing to 10 to 15 knots
in the late morning and early afternoon...then backing to the
east 10 to 15 knots early in the afternoon. a chance of showers.
waves 3 to 5 feet. 
.tuesday night...north winds 5 to 10 knots. a chance of showers.
waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening
and overnight. 
.wednesday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the morning...then becoming east 10 to 15 knots
late in the evening. a chance of showers. showers likely late in
the evening. waves 1 to 3 feet building to 3 to 5 feet late in
the evening. 
.thursday...east winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then veering
to the southwest . showers likely early in the morning...then a
chance of showers until early evening. waves 3 to 5 feet. 
.friday...northwest winds 10 to 15 knots veering to the east
early in the evening...then becoming southeast 15 to 20 knots by
midnight. a chance of showers by midnight. waves 2 to 4 feet
building to 5 to 7 feet. waves occasionally around 10 feet. 


$$

fzus63 kdtx 121957
glflh 
expires:202604130400;;260055

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt sun apr 12 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...a warm front lifts across the region today, then
stalls across the northern great lakes through much of the week.
multiple passing disturbances bring rounds of showers,
thunderstorms, and gusty winds through friday.


lhz363-462>464-130400-
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-
357 pm edt sun apr 12 2026

.tonight...southeast winds 15 to 20 knots becoming south 20 to
25 knots with gusts to around 30 knots in the late evening and
overnight. a chance of showers in the evening...then showers
after midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots late in the afternoon. a chance of showers in the
morning. waves 5 to 7 feet subsiding to 3 to 5 feet late in the
afternoon. waves occasionally around 10 feet. 
.monday night...north winds 5 to 10 knots veering to the east by
midnight...then increasing to 10 to 15 knots after midnight. a
chance of showers in the evening...then 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 15 to 20 knots becoming southwest 10 to
15 knots early in the afternoon. a chance of showers and
thunderstorms in the morning...then a chance of showers in the
afternoon. waves 3 to 5 feet. 
.tuesday night...southwest winds 10 to 15 knots becoming
southeast 5 to 10 knots in the late evening and overnight. a
chance of showers and thunderstorms in the evening...then showers
likely after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet
in the late evening and overnight. 
.wednesday...southwest winds 10 to 15 knots backing to the east
late in the evening. a chance of showers. showers likely late in
the afternoon. waves 1 to 3 feet building to 2 to 4 feet late in
the evening. 
.thursday...southeast winds 15 to 20 knots becoming southwest
10 to 15 knots. showers likely early in the morning...then a
chance of showers until early evening. waves 3 to 5 feet
subsiding to 2 to 4 feet by midnight. 
.friday...west winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and early afternoon...then backing to the
southeast early in the evening becoming south 15 to 20 knots by
midnight. a chance of. waves 2 to 4 feet building to 4 to 6 feet
by midnight. waves occasionally around 8 feet. 


$$

fzus63 kmkx 121953
glflm 
expires:202604130315;;260027

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt sun apr 12 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 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early monday morning. this 
will bring breezy south winds to all of lake michigan, but with 
the gales over the north third this evening into early monday 
morning. thus have upgraded to a gale warning.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, another passing low pressure systems along the 
stalled front will lead to intermittent 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.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-130315-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from two rivers to sheboygan wi 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 pentwater to manistee mi 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-
253 pm cdt sun apr 12 2026

two rivers wi to manistee mi south...

.tonight...southwest gales to 35 kt diminishing to 30 kt. patchy
fog this evening, then areas of dense fog overnight. rain showers
and slight chance of thunderstorms this evening, then chance of
rain showers overnight. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft. 
.monday...southwest winds 15 to 25 kt becoming south 10 to 20 kt.
patchy fog. slight chance of rain showers and thunderstorms in
the afternoon. waves 5 to 8 ft occasionally to 10 ft subsiding to
2 to 4 ft. 
.monday night...south winds 10 to 20 kt increasing to 15 to 25 kt
late in the evening, then increasing to 30 kt after midnight
becoming southwest late. patchy fog in the evening. rain showers
with a chance of thunderstorms in the evening, then chance of
rain showers and thunderstorms overnight. waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers and thunderstorms in the afternoon.
waves 4 to 7 ft occasionally to 9 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming west 15 to
25 kt. rain showers with a chance of thunderstorms in the
evening, then rain showers overnight. waves 3 to 5 ft. 
.wednesday...northwest winds 15 to 25 kt backing to southeast
10 to 20 kt. rain showers likely in the morning, then rain
showers in the afternoon. waves 3 to 5 ft. 
.wednesday night...south winds 10 to 20 kt. rain showers likely.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of rain showers. waves 4 to 6 ft occasionally to
8 ft. 
.friday...southeast winds 10 to 20 kt becoming south. waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 121953
glflm 
expires:202604130315;;260026

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt sun apr 12 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 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early monday morning. this 
will bring breezy south winds to all of lake michigan, but with 
the gales over the north third this evening into early monday 
morning. thus have upgraded to a gale warning.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, another passing low pressure systems along the 
stalled front will lead to intermittent 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.


lmz261-362-364-366-563-565-130315-
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-
253 pm cdt sun apr 12 2026

two rivers wi to manistee mi north...

...gale warning in effect through late tonight...

.tonight...south gales to 35 kt becoming southwest. patchy fog
this evening, then areas of dense fog overnight. rain showers
likely with a chance of thunderstorms this evening, then slight
chance of rain showers overnight. waves 8 to 11 ft occasionally
to 14 ft building to 8 to 12 ft occasionally to 16 ft, then
subsiding to 8 to 11 ft occasionally to 14 ft. 
.monday...west winds to 30 kt diminishing to 10 to 20 kt late in
the morning, then veering to northeast 10 to 15 kt early in the
afternoon veering to southeast late. areas of fog in the morning.
waves 6 to 9 ft occasionally to 12 ft subsiding to 2 to 4 ft. 
.monday night...east winds 10 to 20 kt becoming southeast. rain
showers with a chance of thunderstorms. waves 3 to 5 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south 10 to
15 kt. chance of rain showers in the afternoon. waves 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt becoming north 10 to
20 kt. chance of rain showers. waves 2 to 4 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of rain showers. waves 1 to 3 ft. 
.wednesday night...east winds 10 to 20 kt. rain showers likely.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday...south winds 10 to 20 kt becoming southwest. chance of
rain showers. waves 4 to 6 ft occasionally to 8 ft. 
.friday...southeast winds 10 to 20 kt becoming south. waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260312

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz266-130800-
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 sun apr 12 2026

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

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

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260313

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt sun apr 12 2026

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

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

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260310

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt sun apr 12 2026

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

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

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260308

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun apr 12 2026 /300 pm cdt sun apr 12 2026/

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

.late this afternoon...northeast winds 10 to 20 knots. patchy
dense fog. a chance of rain showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then diminishing to 5 to 15 knots late. a slight
chance of showers and thunderstorms through midnight. areas of
dense fog through midnight, then patchy fog after midnight. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northeast in the
afternoon, then veering east late. a slight chance of rain
showers by mid afternoon. waves calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. rain showers and a slight chance of thunderstorms through
midnight, then a chance of rain showers after midnight. waves
building to 2 to 4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a slight chance of rain showers
through early afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a chance of
rain showers. waves building to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.friday...northeast winds 15 to 25 knots becoming northwest 20 to
30 knots. a chance of rain showers, then rain showers likely,
possibly mixed with snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260309

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz263-130800-
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 sun apr 12 2026

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

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

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260311

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun apr 12 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt sun apr 12 2026

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

.late this afternoon...south winds 15 to 25 knots. patchy fog. a
chance of showers and thunderstorms. waves 3 to 5 feet
occasionally to 7 feet. 
.tonight...south winds 20 to 30 knots veering west after
midnight, then diminishing to 15 to 25 knots late. areas of dense
fog. a slight chance of thunderstorms through midnight. a chance
of rain showers. waves subsiding to 2 to 4 feet. 
.monday...west winds 10 to 20 knots veering northwest in the
afternoon, then becoming east 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. rain showers and a slight chance of
thunderstorms. waves building to 1 to 3 feet. 
.tuesday...east winds 10 to 20 knots backing north by mid
afternoon. a slight chance of rain showers through early
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots veering east by mid
afternoon. a chance of rain showers. waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of rain showers. waves building
to 2 to 4 feet. 
.thursday...north winds 10 to 20 knots becoming southeast 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet. 
.friday...southeast winds 20 to 30 knots becoming northwest gales
to 35 knots. a chance of rain showers, then rain showers,
possibly mixed with snow. waves building to 7 to 10 feet
occasionally to 13 feet. 

$$