fzus63 kdtx 130743
glflh 
expires:202605131545;;478805

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 am edt wed may 13 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure of 29.60 inches tracking through lake
huron this morning will bring gusty west winds of 25 to 30 knots.
much lighter winds for thursday as high pressure arrives.


lhz363-462>464-131545-
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-
343 am edt wed may 13 2026

.today...southwest winds 15 to 25 knots veering to the west in 
the afternoon. a chance of showers in the afternoon. waves 5 to 7 
feet building to 6 to 9 feet late in the afternoon. waves 
occasionally around 12 feet. 
.tonight...northwest winds 15 to 20 knots. gusts to 30 knots in
the evening. a chance of showers in the evening. waves 6 to
9 feet. waves occasionally around 12 feet. 
.thursday...northwest winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.thursday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 3 to 5 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.friday...south winds 5 to 10 knots increasing to 15 to 20 knots.
waves 2 feet or less building to 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday...southwest winds 10 to 15 knots. waves 3 to 5 feet. 
.sunday...north winds 5 to 10 knots veering to the northeast
until early evening...then increasing to 10 to 15 knots by
midnight. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet until early evening...then building to 2 to 4 feet by
midnight. 


$$

fzus63 kdtx 130743
glflh 
expires:202605131545;;478804

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 am edt wed may 13 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure of 29.60 inches tracking through lake
huron this morning will bring gusty west winds of 25 to 30 knots.
much lighter winds for thursday as high pressure arrives.


lhz361-362-131545-
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-
343 am edt wed may 13 2026

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


$$

fzus63 kmkx 130806
glflm 
expires:202605131530;;479467

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt wed may 13 2026

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

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

.synopsis...

gusty northwest winds will continue into today, as low pressure 
around 29.6 inches moves east of the region. a few gale force 
gusts may occur. lighter winds are then expected thursday, as high
pressure around 30.1 inches moves southeast through the region. 
breezy southerly winds are expected to develop friday, with a few 
gales possible friday afternoon and evening in northern portions 
of the lake. south to southwest winds then linger friday night 
into saturday. winds should then increase gradually for sunday, 
as a warm front moves northward into the region, ahead of low 
pressure around 29.2 inches in the central plains. 


lmz261-362-364-366-563-565-567-868-131530-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
306 am cdt wed may 13 2026

sheboygan wi to pentwater mi north...

.today...northwest winds to 30 kt. waves 4 to 7 ft occasionally
to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tonight...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 3 ft. 
.thursday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt increasing to gales to 35 kt.
chance of rain showers in the morning. waves 4 to 7 ft
occasionally to 9 ft building to 7 to 10 ft occasionally to
13 ft. 
.friday night...south gales to 35 kt becoming southwest to 30 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.saturday...southwest winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...northeast winds 10 to 20 kt becoming east. chance of
rain showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 130806
glflm 
expires:202605131530;;479468

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt wed may 13 2026

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

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

.synopsis...

gusty northwest winds will continue into today, as low pressure 
around 29.6 inches moves east of the region. a few gale force 
gusts may occur. lighter winds are then expected thursday, as high
pressure around 30.1 inches moves southeast through the region. 
breezy southerly winds are expected to develop friday, with a few 
gales possible friday afternoon and evening in northern portions 
of the lake. south to southwest winds then linger friday night 
into saturday. winds should then increase gradually for sunday, 
as a warm front moves northward into the region, ahead of low 
pressure around 29.2 inches in the central plains. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-131530-
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-
306 am cdt wed may 13 2026

sheboygan wi to pentwater mi south...

.today...northwest winds to 30 kt becoming north. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.tonight...north winds to 30 kt becoming northwest 10 to 15 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...southeast winds 5 to 10 kt becoming south 10 to
20 kt overnight. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally
to 12 ft. 
.friday night...south winds to 30 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...southeast winds 10 to 20 kt. chance of rain showers.
waves 2 to 4 ft.  

$$

fzus63 kmkx 130221
glflm 
expires:202605130915;;465663

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
921 pm cdt tue may 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 of 29.7 inches is currently centered over lower
michigan state, with a cold front trailings southeast over the
middle of the lake and into southeast wisconsin. this front is
expected to continue to move southeast with southerly gales
continuing just ahead of the front. these gales should largely
diminish through 11 pm cdt and a gale warning will continue over
the middle third of the lake through that time.

gusty west to northwest winds will arrive behind the cold front 
later tonight into wednesday. northwest gusts could approach gale
force for a time tonight into early wednesday, but are expected 
to mainly stay below gales. lighter northerly winds are then 
likely thursday as high pressure of 30.2 inches moves overhead. 
breezy southerly winds are expected to develop friday ahead of the
next approaching low pressure system.


lmz261-362-130915-
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-
921 pm cdt tue may 12 2026

rock island passage to charlevoix mi north...

.rest of tonight...east winds 15 to 25 kt backing to northwest to
30 kt. isolated rain showers and slight chance of thunderstorms
late this evening, then slight chance of rain showers overnight.
waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...northwest winds to 30 kt. slight chance of rain
showers in the morning. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.wednesday night...northwest winds 15 to 25 kt becoming north
10 to 15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft. 
.thursday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft. 
.saturday...southwest winds 15 to 25 kt becoming west. waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...east winds 10 to 15 kt increasing to 10 to 20 kt.
chance of rain showers. waves 1 to 2 ft building to 1 to 3 ft.  

$$

fzus63 kmkx 130221
glflm 
expires:202605130915;;465664

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
921 pm cdt tue may 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 of 29.7 inches is currently centered over lower
michigan state, with a cold front trailings southeast over the
middle of the lake and into southeast wisconsin. this front is
expected to continue to move southeast with southerly gales
continuing just ahead of the front. these gales should largely
diminish through 11 pm cdt and a gale warning will continue over
the middle third of the lake through that time.

gusty west to northwest winds will arrive behind the cold front 
later tonight into wednesday. northwest gusts could approach gale
force for a time tonight into early wednesday, but are expected 
to mainly stay below gales. lighter northerly winds are then 
likely thursday as high pressure of 30.2 inches moves overhead. 
breezy southerly winds are expected to develop friday ahead of the
next approaching low pressure system.


lmz364-366-563-565-567-868-130915-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
921 pm cdt tue may 12 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

...gale warning in effect until 11 pm cdt this evening...

.rest of tonight...west winds to 30 kt becoming northwest. slight
chance of thunderstorms with isolated rain showers late this
evening, then slight chance of rain showers overnight. waves 4 to
7 ft occasionally to 9 ft. 
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt. waves 1 to 2 ft. 
.thursday night...south winds 5 to 10 kt increasing to 10 to
20 kt overnight. waves 1 ft or less building to 2 to 4 ft.
.friday...south winds to 30 kt. chance of rain showers. waves
5 to 8 ft occasionally to 10 ft building to 7 to 10 ft
occasionally to 13 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.saturday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 130221
glflm 
expires:202605130915;;465665

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
921 pm cdt tue may 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 of 29.7 inches is currently centered over lower
michigan state, with a cold front trailings southeast over the
middle of the lake and into southeast wisconsin. this front is
expected to continue to move southeast with southerly gales
continuing just ahead of the front. these gales should largely
diminish through 11 pm cdt and a gale warning will continue over
the middle third of the lake through that time.

gusty west to northwest winds will arrive behind the cold front 
later tonight into wednesday. northwest gusts could approach gale
force for a time tonight into early wednesday, but are expected 
to mainly stay below gales. lighter northerly winds are then 
likely thursday as high pressure of 30.2 inches moves overhead. 
breezy southerly winds are expected to develop friday ahead of the
next approaching low pressure system.


lmz669-671-673-675-870-872-874-876-130915-
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 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-
921 pm cdt tue may 12 2026

sheboygan wi to pentwater mi south to winthrop harbor il to south
haven mi...

...gale warning in effect until 11 pm cdt this evening...

.rest of tonight...west gales to 35 kt becoming northwest to
30 kt. scattered rain showers and slight chance of thunderstorms
late this evening. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.wednesday night...north winds to 30 kt becoming northwest 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...south winds 5 to 10 kt increasing to 10 to
20 kt overnight. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft. 
.friday night...south winds to 30 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.saturday...southwest winds 10 to 20 kt. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 3 to 5 ft.  

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479099

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz162-132000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt wed may 13 2026 /301 am cdt wed may 13 2026/

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

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479100

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz263-132000-
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 wed may 13 2026

.early this morning...northwest winds 5 to 15 knots. waves 2 to
4 feet. 
.today...northwest winds 5 to 15 knots backing west in the
afternoon. waves subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering northeast after
midnight, then becoming east less than 10 knots late. waves calm
to 2 feet. 
.thursday...east winds less than 10 knots increasing to 10 to
20 knots. waves building to 2 to 4 feet. 
.thursday night...southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. a chance of rain showers through
midnight, then rain showers likely after midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 15 to 25 knots veering southwest by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.friday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.saturday...west gales to 35 knots becoming east 5 to 15 knots.
waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to calm to 2 feet. 
.sunday...east winds 20 to 30 knots. rain showers likely. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479101

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz264-132000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt wed may 13 2026

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

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479102

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz265-132000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt wed may 13 2026

.early this morning...northwest winds 20 to 30 knots. a slight
chance of rain. waves 4 to 7 feet occasionally to 9 feet. 
.today...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering east in the
afternoon, then increasing to 15 to 25 knots late. waves building
to 2 to 4 feet. 
.thursday night...southeast winds 20 to 30 knots veering south
after midnight. a chance of rain showers after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots. a chance of rain showers
through early afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...south winds 20 to 30 knots veering west after
midnight. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.saturday...west gales to 40 knots becoming east 5 to 15 knots.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to calm to 2 feet. 
.sunday...east winds 15 to 25 knots increasing to 20 to 30 knots.
rain showers likely. waves building to 4 to 7 feet occasionally
to 9 feet. 

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479103

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz266-132000-
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 wed may 13 2026

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

$$

fzus63 kmqt 130801
glfls 
expires:202605132000;;479104

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed may 13 2026

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

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

.synopsis... 

a 29.6 inch low will depart the region today, tracking over lake 
huron to eastern ontario where it will stall through thursday 
morning. ridging moves back over lake superior in its wake and 
builds to 30.1 inches tonight into thursday. this ridging is pressed 
southeast to the lower great lakes late thursday into friday while a 
29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz267-132000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt wed may 13 2026

.early this morning...north winds 15 to 25 knots. a chance of
rain. waves 3 to 6 feet occasionally to 8 feet. 
.today...north winds 20 to 30 knots backing northwest in the
afternoon. patchy fog through early afternoon. a slight chance of
rain through early afternoon. waves 3 to 6 feet occasionally to
8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest in the
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south winds 20 to 30 knots. a chance of rain showers
through early afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 35 knots becoming northeast 5 to
15 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$