fzus63 kdtx 171938
glflh 
expires:202605180345;;726705

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sun may 17 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 frontal boundary remains stalled over southern lake
huron this afternoon, before lifting north as a warm front
overnight. a few strong to severe thunderstorms will be possible
this afternoon and evening with additional chances both monday
and tuesday afternoon. breezy southerly flow develops early week
as well.


lhz361-180345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
338 pm edt sun may 17 2026

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


$$

fzus63 kdtx 171938
glflh 
expires:202605180345;;726706

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sun may 17 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 frontal boundary remains stalled over southern lake
huron this afternoon, before lifting north as a warm front
overnight. a few strong to severe thunderstorms will be possible
this afternoon and evening with additional chances both monday
and tuesday afternoon. breezy southerly flow develops early week
as well.


lhz362-363-180345-
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-
338 pm edt sun may 17 2026

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


$$

fzus63 kdtx 171938
glflh 
expires:202605180345;;726707

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sun may 17 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 frontal boundary remains stalled over southern lake
huron this afternoon, before lifting north as a warm front
overnight. a few strong to severe thunderstorms will be possible
this afternoon and evening with additional chances both monday
and tuesday afternoon. breezy southerly flow develops early week
as well.


lhz462>464-180345-
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-
338 pm edt sun may 17 2026

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


$$

fzus63 kmkx 171959
glflm 
expires:202605180315;;727136

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 pm cdt sun may 17 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 northeast winds continue across north of the warm front
across much of the lake. expect to see the front gradually return
north as a warm front overnight tonight, with winds veering 
southerly and becoming gusty as low pressure around 29.5 inches 
approaches from the west. breezy south winds will then continue 
through monday and into tuesday followed by a wind shift to the 
northwest late tuesday afternoon and evening with the passage of a
cold front. high pressure and light and variable winds will then 
take hold from late wednesday into thursday.


lmz261-362-364-366-563-565-567-868-180315-
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-
259 pm cdt sun may 17 2026

sheboygan wi to pentwater mi north...

.tonight...east winds to 30 kt veering to south. patchy fog. rain
showers with a chance of thunderstorms this evening, then chance
of rain showers and slight chance of thunderstorms overnight.
waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. patchy fog. chance of showers and
slight chance of thunderstorms. waves 6 to 9 ft occasionally to
12 ft. 
.monday night...south winds to 30 kt. areas of dense fog in the
evening. chance of showers in the evening, then showers with a
chance of thunderstorms overnight. waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.tuesday...south gales to 35 kt becoming southwest. showers in
the morning. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday night...northwest winds to 30 kt diminishing to 15 to
25 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft. 
.wednesday...northwest winds 15 to 25 kt becoming north. waves
2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
5 to 10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday...east winds 5 to 10 kt becoming northeast 10 to 20 kt.
waves 1 ft or less. 
.friday...southeast winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 171959
glflm 
expires:202605180315;;727137

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 pm cdt sun may 17 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 northeast winds continue across north of the warm front
across much of the lake. expect to see the front gradually return
north as a warm front overnight tonight, with winds veering 
southerly and becoming gusty as low pressure around 29.5 inches 
approaches from the west. breezy south winds will then continue 
through monday and into tuesday followed by a wind shift to the 
northwest late tuesday afternoon and evening with the passage of a
cold front. high pressure and light and variable winds will then 
take hold from late wednesday into thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180315-
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-
259 pm cdt sun may 17 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 15 to 25 kt becoming south to 30 kt.
patchy fog this evening. slight chance of rain showers overnight.
waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers and
thunderstorms. patchy fog in the afternoon. waves 5 to 8 ft
occasionally to 10 ft. 
.monday night...south winds 15 to 25 kt increasing to 30 kt.
chance of showers and thunderstorms. waves 4 to 7 ft occasionally
to 9 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday night...west winds 15 to 25 kt becoming northwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.wednesday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt. waves 3 to 5 ft. 
.thursday...east winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft.  

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727376

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun may 17 2026 /301 pm cdt sun may 17 2026/

...gale warning in effect until 11 pm edt /10 pm cdt/ this
evening...

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

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727377

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz263-180800-
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 pm edt sun may 17 2026

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

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727378

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz264-180800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sun may 17 2026

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

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727379

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz265-180800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sun may 17 2026

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

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727380

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz266-180800-
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 pm edt sun may 17 2026

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

$$

fzus63 kmqt 172002
glfls 
expires:202605180800;;727381

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun may 17 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... 

ridging of 30.1 inches shifts east into quebec tonight as a 29.2 
inch low moves out of colorado. this low will weaken to 29.7 inches 
as it reaches lake superior late tonight. another low pressure will 
follow it, reaching lake superior by tuesday morning at 29.7 inches. 
thereafter, a 30.1 inch high will build into the midwest tuesday 
night, strengthening to 30.4 inches over lake superior wednesday 
night. the high pressure will shift east on thursday with weaker 
ridging of 30.1 inches over the lake continuing into at least 
friday morning.



lsz267-180800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sun may 17 2026

.late this afternoon...northeast winds 10 to 20 knots. a slight
chance of showers. waves calm to 2 feet. 
.tonight...east winds 15 to 25 knots increasing to 20 to 30 knots
after midnight, then veering southeast late. rain showers likely
and a chance of thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.monday...southeast winds 15 to 25 knots becoming south 10 to
20 knots in the afternoon, then veering northwest late. showers
likely through early afternoon. a slight chance of thunderstorms.
a chance of showers by mid afternoon. waves subsiding to calm to
2 feet. 
.monday night...west winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then becoming southeast 15 to 25 knots
late. a chance of rain showers through midnight. a slight chance
of thunderstorms. rain showers likely after midnight. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 20 to 30 knots becoming west gales to
35 knots by mid afternoon. rain showers through early afternoon.
a slight chance of thunderstorms. a slight chance of rain showers
by mid afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tuesday night...northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. waves subsiding to 7 to 10 feet
occasionally to 13 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west winds 5 to 15 knots backing south after
midnight. waves subsiding to calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots. waves calm to 2 feet. 

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