fzus63 kdtx 211359
glflh 
expires:202605212200;;402761

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am edt thu may 21 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, 30.40 inches, will slowly build
eastward from the northern great lakes to the eastern great lakes
through friday. northeast wind veers east and strengthens into
saturday as low pressure tracks in from the mid-mississippi
valley.


lhz361-212200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
959 am edt thu may 21 2026

.rest of today...east winds 5 to 10 knots. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots early in the evening becoming
light and variable...then becoming east 5 to 10 knots after
midnight. waves 2 feet or less. 
.friday...east winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. waves 1 to 3 feet building to
2 to 4 feet early in the afternoon. 
.friday night...east winds 10 to 15 knots increasing to 15 to
20 knots after midnight. waves 2 to 4 feet building to 4 to
6 feet after midnight. waves occasionally around 8 feet. 
.saturday...east winds 20 to 25 knots increasing to 30 knots late
in the morning...then decreasing to 15 to 20 knots late in the
evening. gusts to 35 knot gales. showers likely...then a chance
of showers late in the afternoon. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.sunday...southeast winds 5 to 10 knots early in the morning
veering to the south...then backing to the northeast early in the
evening becoming light and variable. waves 3 to 5 feet subsiding
to 2 feet or less . 
.monday...light and variable winds becoming north 5 to 10 knots
early in the evening...then backing to the southwest by midnight.
waves 2 feet or less. 


$$

fzus63 kdtx 211359
glflh 
expires:202605212200;;402762

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am edt thu may 21 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, 30.40 inches, will slowly build
eastward from the northern great lakes to the eastern great lakes
through friday. northeast wind veers east and strengthens into
saturday as low pressure tracks in from the mid-mississippi
valley.


lhz362-363-212200-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
959 am edt thu may 21 2026

.rest of today...northeast winds 10 to 15 knots decreasing to
5 to 10 knots late in the afternoon. waves 2 to 4 feet. 
.tonight...northeast winds 5 to 10 knots increasing to 10 to
15 knots early in the morning. waves 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet early in the afternoon. 
.friday night...northeast winds 10 to 15 knots becoming east
15 to 20 knots after midnight. a chance of showers after
midnight. waves 3 to 5 feet. 
.saturday...east winds 20 to 25 knots with gusts to 35 knot gales
becoming southeast 10 to 15 knots late in the evening. showers.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.sunday...southeast winds 5 to 10 knots becoming light and
variable. waves 3 to 5 feet subsiding to 2 feet or less . 
.monday...light and variable winds becoming west 5 to 10 knots in
the late morning and early afternoon...then veering to the north
early in the evening veering to the southeast by midnight. waves
2 feet or less. 


$$

fzus63 kdtx 211359
glflh 
expires:202605212200;;402763

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am edt thu may 21 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, 30.40 inches, will slowly build
eastward from the northern great lakes to the eastern great lakes
through friday. northeast wind veers east and strengthens into
saturday as low pressure tracks in from the mid-mississippi
valley.


lhz462>464-212200-
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-
959 am edt thu may 21 2026

.rest of today...northeast winds 10 to 15 knots. waves 2 to
4 feet. 
.tonight...northeast winds 10 to 15 knots veering to the east
early in the morning. waves 2 to 4 feet subsiding to 1 to 3 feet
after midnight. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet early in the afternoon. 
.friday night...east winds 10 to 15 knots increasing to 15 to
20 knots after midnight. showers likely after midnight. waves
3 to 5 feet. 
.saturday...east winds 20 to 25 knots with gusts to 35 knot gales
becoming southeast 10 to 15 knots late in the evening. showers. a
chance of showers late in the afternoon. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
. a chance of showers. waves 2 to 4 feet subsiding to 2 feet or
less. 
.monday...light and variable winds becoming north 5 to 10 knots
early in the evening...then becoming light and variable by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 211357
glflm 
expires:202605212115;;402705

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
857 am cdt thu may 21 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...

high pressure of 30.4 inches centered over lake superior will 
will gradually shift eastward through the end of the week. 
persistent east to northeast winds of 10 to 20 knots are expected 
through friday, with winds becoming northerly on saturday as low 
pressure of 29.8 inches lifts northeast into southern michigan. 
winds could increase a bit friday night into saturday, depending 
on the exact track and strength of the low, though winds are 
likely to stay below gale force. southerly winds are then expected
to develop early next week.


lmz261-362-364-366-563-565-567-868-212115-
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-
857 am cdt thu may 21 2026

sheboygan wi to pentwater mi north...

.rest of today...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.tonight...northeast winds 10 to 20 kt becoming east. waves 1 to
3 ft. 
.friday...east winds 10 to 20 kt becoming northeast to 30 kt.
waves 2 to 4 ft building to 3 to 5 ft. 
.friday night...east winds 15 to 25 kt increasing to 30 kt.
showers likely overnight. waves 3 to 5 ft. 
.saturday...east winds to 30 kt becoming northeast. showers
likely in the morning, then chance of showers in the afternoon.
waves 4 to 7 ft occasionally to 9 ft. 
.saturday night...northeast winds to 30 kt veering to south 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft. 
.sunday...south winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 to 2 ft. 
.monday...southwest winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 211357
glflm 
expires:202605212115;;402706

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
857 am cdt thu may 21 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...

high pressure of 30.4 inches centered over lake superior will 
will gradually shift eastward through the end of the week. 
persistent east to northeast winds of 10 to 20 knots are expected 
through friday, with winds becoming northerly on saturday as low 
pressure of 29.8 inches lifts northeast into southern michigan. 
winds could increase a bit friday night into saturday, depending 
on the exact track and strength of the low, though winds are 
likely to stay below gale force. southerly winds are then expected
to develop early next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-212115-
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-
857 am cdt thu may 21 2026

sheboygan wi to pentwater mi south...

.rest of today...northeast winds 10 to 20 kt becoming north 15 to
25 kt. waves 3 to 5 ft. 
.tonight...northeast winds 15 to 25 kt becoming east. waves 3 to
5 ft. 
.friday...east winds 15 to 25 kt becoming northeast 10 to 20 kt.
waves 2 to 4 ft. 
.friday night...east winds 15 to 25 kt. chance of showers in the
evening, then showers overnight. waves 4 to 6 ft occasionally to
8 ft. 
.saturday...northeast winds 15 to 25 kt becoming north 10 to
20 kt. chance of showers. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.saturday night...north winds 10 to 15 kt veering to south. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.sunday...south winds 5 to 10 kt. waves 1 to 2 ft. 
.monday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402802

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz162-212000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu may 21 2026 /900 am cdt thu may 21 2026/

.rest of today...east winds 5 to 15 knots becoming northeast
10 to 20 knots late. waves calm to 2 feet building to 1 to
3 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering east late. waves subsiding
to calm to 2 feet. 
.friday...east winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. rain showers likely through early
afternoon, then a chance of rain showers by mid afternoon. waves
subsiding to 1 to 3 feet. 
.saturday night...northeast winds 5 to 15 knots becoming west
less than 10 knots after midnight. waves subsiding to calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402803

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz263-212000-
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 thu may 21 2026

.rest of today...southeast winds less than 10 knots becoming
northeast 5 to 15 knots in the afternoon. waves calm to 2 feet
building to 1 to 3 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. waves subsiding to calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 3 to 5 feet occasionally to 7 feet. 
.friday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers after midnight.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots. rain showers through early
afternoon, then a chance of rain showers by mid afternoon. waves
building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...east winds 5 to 15 knots veering west after
midnight. waves subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402804

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz264-212000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt thu may 21 2026

.rest of today...south winds less than 10 knots becoming
southeast 5 to 15 knots in the afternoon. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.friday...southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 10 to 20 knots. waves building to 2 to
4 feet. 
.saturday...east winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. rain showers likely. waves building to
3 to 6 feet occasionally to 8 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402805

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz265-212000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt thu may 21 2026

.rest of today...southeast winds 10 to 20 knots backing east in
the afternoon. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.friday...southeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday night...southeast winds 15 to 25 knots backing east after
midnight. a slight chance of rain showers after midnight. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...east winds 15 to 25 knots. rain showers likely
through early afternoon, then a chance of rain showers by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots backing southwest. waves calm
to 2 feet. 
.monday...southeast winds 10 to 20 knots veering south. waves
calm to 2 feet. 

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402806

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz266-212000-
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 thu may 21 2026

.rest of today...south winds 5 to 15 knots backing east late.
waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 15 to 25 knots. a slight chance of
rain showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...east winds 15 to 25 knots. showers likely through
early afternoon, then a chance of showers by mid afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday...south winds 5 to 15 knots increasing to 10 to 20 knots.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 211401
glfls 
expires:202605212000;;402807

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu may 21 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 30.4 inch high pressure remains over lake superior today before 
shifting east through friday into new england and quebec. meanwhile, 
a 29.7 inch low develops over the plains and lifts toward the great 
lakes. the low gradually weakens to 29.9 inches as it lifts over 
lower michigan and the eastern great lakes saturday into sunday. 
weak troughing of 30.0 inches passes northward over lake superior 
saturday night into sunday before ridging of around 30.0 inches 
returns on monday.



lsz267-212000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt thu may 21 2026

.rest of today...east winds 5 to 15 knots backing northeast in
the afternoon, then increasing to 10 to 20 knots late. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.friday...east winds 10 to 20 knots. waves building to 1 to
3 feet. 
.friday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...east winds 20 to 30 knots veering southeast by mid
afternoon. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a chance of rain showers. waves
subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 
.monday...southeast winds 5 to 15 knots veering south. waves calm
to 2 feet. 

$$