fzus61 kbuf 121410
glflo 
expires:202604122100;;245971

open lake forecast for lake ontario
national weather service buffalo ny
1009 am 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 drift east 
into new england today, before sliding off the coast tonight. a 29.4 
inch low over the upper midwest today, will move quickly 
northeastward to near james bay tonight, while pushing an attendant 
warm front across the lake this afternoon. 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.


loz062-122100-
lake ontario open waters from the niagara river to hamlin beach-
1010 am edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 121410
glflo 
expires:202604122100;;245972

open lake forecast for lake ontario
national weather service buffalo ny
1009 am 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 drift east 
into new england today, before sliding off the coast tonight. a 29.4 
inch low over the upper midwest today, will move quickly 
northeastward to near james bay tonight, while pushing an attendant 
warm front across the lake this afternoon. 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>065-122100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1010 am edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121710
glfle 
expires:202604122015;;251669

open lake forecast for lake erie
national weather service cleveland oh
110 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...
a warm front will lift across lake erie this afternoon with a cold
front approaching from the northwest on monday. the cold front
will slow to the north of the lake tuesday and wednesday before
low pressure 20.60 inches passes to the northwest of lake erie on
thursday.


lez061-168-169-122015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
110 pm edt sun apr 12 2026

.this afternoon...southeast winds 5 to 15 knots becoming south. a
slight chance of showers. waves 2 feet or less. 
.tonight...south winds 15 to 20 knots becoming southwest. showers
likely late. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...southwest winds 15 to 20 knots. showers likely in the
morning, then a chance of showers in the afternoon. waves 3 to
5 feet. 
.monday night...southwest winds 15 to 20 knots becoming south
10 to 15 knots. a chance of showers in the evening, then showers
likely overnight. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.tuesday...southwest winds 10 to 15 knots. showers likely with a
chance of thunderstorms. waves 1 to 3 feet. 
.wednesday...southwest winds 5 to 10 knots. showers likely. waves
1 to 3 feet building to 2 to 4 feet. 
.thursday...southwest winds 5 to 15 knots. showers likely during
the day, then a chance of showers thursday night. waves 1 to
3 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121710
glfle 
expires:202604122015;;251668

open lake forecast for lake erie
national weather service cleveland oh
110 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...
a warm front will lift across lake erie this afternoon with a cold
front approaching from the northwest on monday. the cold front
will slow to the north of the lake tuesday and wednesday before
low pressure 20.60 inches passes to the northwest of lake erie on
thursday.


lez164>167-122015-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
110 pm edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121710
glfle 
expires:202604122015;;251667

open lake forecast for lake erie
national weather service cleveland oh
110 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...
a warm front will lift across lake erie this afternoon with a cold
front approaching from the northwest on monday. the cold front
will slow to the north of the lake tuesday and wednesday before
low pressure 20.60 inches passes to the northwest of lake erie on
thursday.


lez162-163-122015-
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-
110 pm edt sun apr 12 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121352
glfsc 
expires:202604122200;;245037

lake st clair forecast
national weather service detroit/pontiac mi
952 am 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.


lcz460-122200-
lake st clair-
952 am edt sun apr 12 2026

.rest of today...southeast winds 10 to 15 knots becoming south 15 to
20 knots late in the afternoon. mostly cloudy. waves 1 to 3 feet.
.tonight...southwest winds 15 to 20 knots. partly cloudy this
evening becoming mostly cloudy. a chance of light showers after
midnight. light showers likely early in the morning. waves 1 to 3
feet.
.monday...southwest winds 15 to 20 knots diminishing to 10 to 15
knots early in the afternoon. cloudy early in the morning becoming
partly sunny. light showers likely early in the morning...then a
chance of light showers in the late morning and early afternoon.
waves 1 to 3 feet.
.monday night...southwest winds 10 to 15 knots. partly cloudy early
in the evening becoming mostly cloudy. a chance of light showers.
light showers likely and a chance of thunderstorms after midnight.
waves 1 to 3 feet.
.tuesday...southwest winds 15 to 20 knots diminishing to 10 to 15
knots in the evening. mostly cloudy in the morning. a chance of
thunderstorms. a chance of light showers in the afternoon.. then
light showers in the evening. waves 1 to 3 feet.
.wednesday...southwest winds 10 to 15 knots. light showers and a
chance of thunderstorms. waves 2 feet or less.
.thursday...west winds 15 to 20 knots. mostly cloudy. light showers
and a chance of thunderstorms. waves 1 to 3 feet.

$$

fzus63 kdtx 121351
glflh 
expires:202604122200;;245031

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am 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>464-122200-
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-
951 am edt sun apr 12 2026

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


$$

fzus63 kdtx 121351
glflh 
expires:202604122200;;245030

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am 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.


lhz361-362-122200-
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-
951 am edt sun apr 12 2026

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


$$

fzus63 kmkx 121347
glflm 
expires:202604122115;;245019

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 am 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 tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half later this afternoon 
into early monday morning. gale conditions expected.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, 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.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-122115-
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-
847 am cdt sun apr 12 2026

two rivers wi to manistee mi south...

.rest of today...south winds to 30 kt. patchy fog. rain showers
likely with a chance of thunderstorms through mid morning, then
chance of rain showers and slight chance of thunderstorms this
afternoon. waves 7 to 10 ft occasionally to 13 ft. 
.tonight...southwest gales to 35 kt diminishing to 30 kt. patchy
fog. rain showers likely with a chance of thunderstorms in the
evening, then chance of rain showers and slight chance of
thunderstorms overnight. waves 8 to 11 ft occasionally to 14 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.monday...southwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the morning, then becoming south early in the afternoon
diminishing to 10 to 15 kt late. chance of rain showers 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 becoming southwest 15 to
25 kt. rain showers likely 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 7 ft occasionally to 9 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft. 
.tuesday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. rain showers with a chance of thunderstorms. waves 2 to
4 ft. 
.wednesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers. waves 2 to 4 ft. 
.thursday...southwest winds 10 to 20 kt becoming west. chance of
rain showers. waves 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 121347
glflm 
expires:202604122115;;245018

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 am 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 tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half later this afternoon 
into early monday morning. gale conditions expected.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, 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.


lmz261-362-364-366-563-565-122115-
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-
847 am cdt sun apr 12 2026

two rivers wi to manistee mi north...

...gale watch in effect from 5 pm cdt this afternoon through late
tonight...

.rest of today...southeast winds to 30 kt becoming south gales to
35 kt. areas of fog. chance of rain showers and thunderstorms.
waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft
occasionally to 13 ft. 
.tonight...south gales to 35 kt becoming southwest. areas of fog.
chance of rain showers and slight chance of thunderstorms in the
evening, then slight chance of rain showers overnight. waves 8 to
12 ft occasionally to 16 ft 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 dense fog in the
morning. waves 6 to 9 ft occasionally to 12 ft subsiding to 2 to
4 ft. 
.monday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. rain showers with a chance of thunderstorms. waves 2 to
4 ft building to 3 to 5 ft. 
.tuesday...southwest winds 10 to 20 kt diminishing to 10 to
15 kt. chance of rain showers in the afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...northeast winds 10 to 15 kt increasing to 10 to
20 kt. chance of rain showers. waves 2 to 4 ft. 
.wednesday...northeast winds 10 to 20 kt becoming east 10 to
15 kt. chance of rain showers. waves 2 to 4 ft. 
.thursday...southwest winds 10 to 20 kt veering to northwest.
chance of rain showers. waves 4 to 7 ft occasionally to 9 ft. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245388

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz267-122000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt sun apr 12 2026

.rest of today...southeast winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots in
the afternoon. a chance of rain showers. a chance of
thunderstorms by mid afternoon. waves 4 to 8 feet occasionally to
10 feet. 
.tonight...south winds 20 to 30 knots veering southwest after
midnight, then becoming west 15 to 25 knots late. a chance of
thunderstorms through midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 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 and a slight
chance of thunderstorms through midnight, then rain showers after
midnight. waves building to 1 to 3 feet. 
.tuesday...northeast 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...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots. a chance of rain showers.
waves building to 2 to 4 feet. 
.thursday...north winds 10 to 20 knots increasing to 15 to
25 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245384

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz263-122000-
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-
1000 am edt sun apr 12 2026

.rest of today...southeast winds 10 to 20 knots veering south
late. a chance of showers and thunderstorms. waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a chance of rain showers and a slight chance of
thunderstorms through midnight. waves subsiding to calm to
2 feet. 
.monday...northwest winds 5 to 15 knots becoming northeast less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. a slight chance of rain showers by mid afternoon. waves
calm to 2 feet. 
.monday night...east winds 10 to 20 knots backing northeast after
midnight. rain showers likely 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 5 to 15 knots. 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 backing northeast. a chance
of rain showers. waves building to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245383

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sun apr 12 2026 /900 am cdt sun apr 12 2026/

.rest of today...east winds 10 to 20 knots backing northeast in
the afternoon. a chance of showers and thunderstorms. waves 1 to
3 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. waves
subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering northeast in the
afternoon, then veering east late. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots. rain showers
likely 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...northeast winds 5 to 15 knots. a chance of rain
showers. waves building to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast 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. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245385

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz264-122000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt sun apr 12 2026

.rest of today...southeast winds 15 to 25 knots becoming south
10 to 20 knots late. a chance of showers and thunderstorms. waves
6 to 9 feet occasionally to 11 feet subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tonight...south winds 10 to 20 knots veering west after
midnight, then diminishing to 5 to 15 knots late. a chance of
rain showers and a slight chance of thunderstorms through
midnight. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots veering northeast late.
waves subsiding to calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. a slight chance of thunderstorms through
midnight. rain showers likely. waves building to 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots. 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. a chance of rain showers.
waves building to 2 to 4 feet. 
.thursday...northeast 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. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245386

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt sun apr 12 2026

.rest of today...southeast winds 15 to 25 knots veering south
late. a chance of showers and thunderstorms. waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 6 feet occasionally to
8 feet. 
.tonight...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight. a chance of thunderstorms through
midnight. a chance of rain showers. waves subsiding to 1 to
3 feet. 
.monday...northwest winds 10 to 20 knots becoming east 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. a slight chance of thunderstorms through
midnight. rain showers. waves building to 1 to 3 feet. 
.tuesday...northeast 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...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots. 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. 

$$

fzus63 kmqt 121401
glfls 
expires:202604122000;;245387

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 the northern plains this morning lifts 
northeast through northwestern lake superior late this afternoon 
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



lsz266-122000-
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-
1000 am edt sun apr 12 2026

.rest of today...south winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots in the
afternoon. a chance of showers and thunderstorms. waves 5 to
9 feet occasionally to 11 feet. 
.tonight...south winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight, then veering northwest late. a chance of
thunderstorms through midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.monday...northwest winds 10 to 20 knots becoming north 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.monday night...east winds 10 to 20 knots. a slight chance of
thunderstorms through midnight. rain showers. waves building to
1 to 3 feet. 
.tuesday...northeast 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...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots increasing to 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...north winds 10 to 20 knots becoming southeast 15 to
25 knots. waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet. 

$$