fzus63 kdtx 150753
glflh 
expires:202605151600;;588761

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 am edt fri may 15 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.00 inches, exits the ohio valley
this morning resulting in light southwest flow that ramps up
through the afternoon. breezy winds develop by this evening ahead
of surface troughing that generates periods of showers and
thunderstorms this weekend into early next week.


lhz361-362-151600-
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-
353 am edt fri may 15 2026

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


$$

fzus63 kdtx 150753
glflh 
expires:202605151600;;588762

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 am edt fri may 15 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.00 inches, exits the ohio valley
this morning resulting in light southwest flow that ramps up
through the afternoon. breezy winds develop by this evening ahead
of surface troughing that generates periods of showers and
thunderstorms this weekend into early next week.


lhz363-462>464-151600-
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-
353 am edt fri may 15 2026

.today...light and variable winds becoming south 10 to 15 knots.
waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. 
.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots after midnight...then decreasing to 10 to 15 knots early
in the morning. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots. a chance of showers in
the morning. waves 3 to 5 feet. 
.saturday night...north winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.sunday...north winds 5 to 10 knots veering to the east late in
the morning...then increasing to 10 to 15 knots late in the
afternoon becoming southeast 15 to 20 knots late in the evening.
a chance of showers late in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet late in the evening. 
.monday...south winds 15 to 20 knots. a chance of showers. a
chance of thunderstorms. rain showers likely by midnight. waves
3 to 5 feet. 
.tuesday...south winds 15 to 20 knots. showers likely early in
the morning. a chance of showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kmkx 150809
glflm 
expires:202605151515;;589797

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
309 am cdt fri may 15 2026

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

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

.synopsis...

southerly winds will increase through the rest of this morning
behind departing high pressure of 30.0 inches and low pressure of
29.0 inches moving from central manitoba into ontario. winds will
peak this afternoon into tonight, leading to a period of 
southerly gales. a gale warning has been issued for the northern 
third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday and moreso on tuesday. multiple rounds 
of showers and storms will be possible this weekend into early 
next week.


lmz261-362-364-563-151515-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
309 am cdt fri may 15 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect from 1 pm cdt this afternoon through
late tonight...

.today...south winds to 30 kt increasing to gales to 35 kt. waves
3 to 5 ft building to 7 to 10 ft occasionally to 13 ft. 
.tonight...south gales to 35 kt becoming southwest to 30 kt.
slight chance of showers and thunderstorms overnight. waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft. 
.saturday...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to
5 ft. 
.saturday night...northeast winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...east winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers in the afternoon. waves 1 to 3 ft building
to 3 to 5 ft. 
.sunday night...east winds to 30 kt becoming southeast. chance of
showers. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...south gales to 40 kt becoming southwest gales to
35 kt. chance of showers. waves 8 to 11 ft occasionally to 14 ft.
 

$$

fzus63 kmkx 150809
glflm 
expires:202605151515;;589798

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
309 am cdt fri may 15 2026

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

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

.synopsis...

southerly winds will increase through the rest of this morning
behind departing high pressure of 30.0 inches and low pressure of
29.0 inches moving from central manitoba into ontario. winds will
peak this afternoon into tonight, leading to a period of 
southerly gales. a gale warning has been issued for the northern 
third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday and moreso on tuesday. multiple rounds 
of showers and storms will be possible this weekend into early 
next week.


lmz366-565-567-868-151515-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
309 am cdt fri may 15 2026

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

.today...south winds 15 to 25 kt increasing to 30 kt. waves 3 to
5 ft building to 7 to 10 ft occasionally to 13 ft. 
.tonight...south winds to 30 kt diminishing to 15 to 25 kt.
chance of showers and slight chance of thunderstorms overnight.
waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.saturday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt backing to east. waves
1 to 3 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.sunday night...southeast winds 15 to 25 kt becoming south.
chance of showers. waves 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 150809
glflm 
expires:202605151515;;589799

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
309 am cdt fri may 15 2026

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

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

.synopsis...

southerly winds will increase through the rest of this morning
behind departing high pressure of 30.0 inches and low pressure of
29.0 inches moving from central manitoba into ontario. winds will
peak this afternoon into tonight, leading to a period of 
southerly gales. a gale warning has been issued for the northern 
third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday and moreso on tuesday. multiple rounds 
of showers and storms will be possible this weekend into early 
next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-151515-
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-
309 am cdt fri may 15 2026

sheboygan wi to pentwater mi south...

.today...south winds 15 to 25 kt increasing to 30 kt. waves 2 to
4 ft building to 7 to 10 ft occasionally to 13 ft. 
.tonight...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers and slight chance of thunderstorms overnight.
waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.saturday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
chance of showers in the morning. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.saturday night...south winds 5 to 10 kt becoming southeast 10 to
15 kt. chance of showers overnight. waves 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers in the morning. waves 2 to 4 ft building to
4 to 6 ft occasionally to 8 ft. 
.sunday night...south winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589069

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt fri may 15 2026 /301 am cdt fri may 15 2026/

.early this morning...south winds 10 to 20 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...southwest winds 10 to 20 knots increasing to 20 to
30 knots. waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to calm to 2 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. waves
building to 8 to 11 feet occasionally to 14 feet. 
.sunday night...northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 2 to 4 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...northeast gales to 40 knots becoming west 20 to
30 knots. a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589070

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz263-152000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 am edt fri may 15 2026

.early this morning...south winds 20 to 30 knots. a chance of
showers. waves 4 to 7 feet occasionally to 9 feet. 
.today...south winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 5 to 8 feet occasionally to 10 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.saturday night...east winds 5 to 15 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.sunday...east winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. rain showers likely by mid afternoon.
waves building to 6 to 9 feet occasionally to 11 feet. 
.sunday night...east gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 2 to 4 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...north gales to 40 knots becoming northwest gales to
35 knots. rain showers likely. waves building to 6 to 10 feet
occasionally to 13 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589071

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt fri may 15 2026

.early this morning...south winds 15 to 25 knots. showers. waves
3 to 6 feet occasionally to 8 feet. 
.today...south winds 15 to 25 knots veering southwest late. a
slight chance of showers through early afternoon. waves building
to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 2 to 4 feet. 
.sunday night...east winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
35 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.tuesday...north gales to 40 knots becoming northwest 20 to
30 knots. rain showers likely. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589072

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt fri may 15 2026

.early this morning...south winds 15 to 25 knots. showers. waves
3 to 5 feet occasionally to 7 feet. 
.today...south winds 15 to 25 knots. a chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 
.tonight...southwest winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then becoming northwest 15 to 25 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.saturday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...east winds 20 to 30 knots veering southeast after
midnight. showers and a chance of thunderstorms. waves building
to 5 to 8 feet occasionally to 10 feet. 
.monday...north winds 15 to 25 knots veering northeast. rain
showers. waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.tuesday...west gales to 35 knots. rain showers likely. waves
building to 7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589073

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz266-152000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 am edt fri may 15 2026

.early this morning...south winds 20 to 30 knots. a chance of
rain showers. waves 4 to 7 feet occasionally to 9 feet. 
.today...south winds 20 to 30 knots. a chance of showers through
early afternoon. waves building to 5 to 8 feet occasionally to
10 feet. 
.tonight...south winds 20 to 30 knots becoming southwest to
30 knots with a few gale force gusts to 35 knots possible after
midnight, then diminishing to 15 to 25 knots late. a slight
chance of showers and thunderstorms through midnight. waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots veering northwest late.
waves subsiding to 1 to 3 feet. 
.saturday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...east gales to 35 knots veering southeast after
midnight. rain showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday...south winds 15 to 25 knots becoming east gales to
35 knots. rain showers likely. waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.tuesday...south gales to 35 knots veering west. rain showers
likely. waves building to 6 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202605152000;;589074

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri may 15 2026

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

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

.synopsis... 

a 29.1 inch low over the canadian prairies will move to northern 
ontario today. this low is expected to bring troughing of 29.6 
inches over lake superior through saturday as it tracks to near 
james bay at 29.2 inches by saturday morning. ridging of 30.1 inches 
builds over the lake from northern ontario saturday night into 
sunday. this is followed by another 29.7 inch trough extending 
northeast toward the upper great lakes from the central plains by 
monday midday, which lingers over the area through tuesday.



lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt fri may 15 2026

.early this morning...south winds 15 to 25 knots. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet. 
.today...south winds 15 to 25 knots increasing to 30 knots with a
few gale force gusts to 35 knots possible. a chance of rain
showers through early afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tonight...south winds 20 to 30 knots becoming southwest 15 to
25 knots late. a slight chance of thunderstorms through midnight.
a slight chance of rain showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southwest winds 15 to 25 knots veering northwest
late. waves subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots becoming
northeast 5 to 15 knots after midnight. waves subsiding to calm
to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...east winds 20 to 30 knots becoming southeast
gales to 35 knots after midnight. rain showers. waves building to
4 to 7 feet occasionally to 9 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots. rain showers likely. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...south winds 20 to 30 knots veering west. rain showers
likely. a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$