fzus61 kbuf 182102
glflo 
expires:202511190400;;098154

open lake forecast for lake ontario
national weather service buffalo ny
402 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 28.8 inch low near the northern labrador/quebec border 
will move northeast towards the north atlantic tonight through 
wednesday. a 30.2 inch high centered over the upper great lakes 
today will build to the lower great lakes wednesday and to new 
england thursday. a 29.5 inch surface low along the southern 
shoreline of hudson bay will swing a cold front east across the 
lower great lakes friday, followed by a 30.0 inch high building over 
the ohio valley and lower great lakes saturday. a weak 29.7 inch 
wave of low pressure will then move across ontario province and the 
lower lakes on sunday.


loz064-065-190400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est tue nov 18 2025

.tonight...northwest winds 5 to 10 knots becoming north. waves
1 to 3 feet subsiding to 1 foot or less. 
.wednesday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.wednesday night...northwest winds less than 10 knots. waves
1 foot or less. 
.thursday...southeast winds 5 to 10 knots. waves 1 foot or less. 
.thursday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. showers likely overnight. waves 1 to 3 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers during the day. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. a chance
of rain showers sunday night. waves 1 to 3 feet. 

$$

fzus61 kbuf 182102
glflo 
expires:202511190400;;098153

open lake forecast for lake ontario
national weather service buffalo ny
402 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 28.8 inch low near the northern labrador/quebec border 
will move northeast towards the north atlantic tonight through 
wednesday. a 30.2 inch high centered over the upper great lakes 
today will build to the lower great lakes wednesday and to new 
england thursday. a 29.5 inch surface low along the southern 
shoreline of hudson bay will swing a cold front east across the 
lower great lakes friday, followed by a 30.0 inch high building over 
the ohio valley and lower great lakes saturday. a weak 29.7 inch 
wave of low pressure will then move across ontario province and the 
lower lakes on sunday.


loz063-190400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est tue nov 18 2025

.tonight...northwest winds 5 to 10 knots becoming north. waves
1 to 2 feet. 
.wednesday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.wednesday night...northwest winds less than 10 knots. waves
1 foot or less. 
.thursday...southeast winds 10 knots or less. waves 1 foot or
less. 
.thursday night...south winds 5 to 15 knots becoming southwest. a
chance of showers overnight. waves 2 feet or less. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of rain showers during the day. waves 2 to
4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus61 kbuf 182102
glflo 
expires:202511190400;;098152

open lake forecast for lake ontario
national weather service buffalo ny
402 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 28.8 inch low near the northern labrador/quebec border 
will move northeast towards the north atlantic tonight through 
wednesday. a 30.2 inch high centered over the upper great lakes 
today will build to the lower great lakes wednesday and to new 
england thursday. a 29.5 inch surface low along the southern 
shoreline of hudson bay will swing a cold front east across the 
lower great lakes friday, followed by a 30.0 inch high building over 
the ohio valley and lower great lakes saturday. a weak 29.7 inch 
wave of low pressure will then move across ontario province and the 
lower lakes on sunday.


loz062-190400-
lake ontario open waters from the niagara river to hamlin beach-
402 pm est tue nov 18 2025

.tonight...northwest winds 10 knots or less becoming northeast.
waves 2 feet or less. 
.wednesday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.wednesday night...north winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds less than 10 knots. waves 1 foot or
less. 
.thursday night...south winds 10 knots or less becoming southwest
10 to 15 knots. a chance of showers in the evening, then showers
likely overnight. waves 2 feet or less. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers likely during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus61 kcle 182004
glfle 
expires:202511190315;;095453

open lake forecast for lake erie
national weather service cleveland oh
304 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley this evening into tonight. high pressure 30.10 inches
will build southeast over the region tonight through wednesday 
night before a cold front tracks east across the great lakes late 
thursday into friday. high pressure 29.90 inches will return to 
the great lakes over the weekend.


lez162>164-190315-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
304 pm est tue nov 18 2025

.tonight...east winds 5 to 10 knots becoming northeast. rain
likely early, then a chance of rain late this evening. waves
2 feet or less. 
.wednesday...northeast winds 5 to 10 knots. waves 2 feet or less.
.wednesday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.thursday...light and variable winds. waves 1 foot or less. 
.thursday night...south winds 5 to 10 knots becoming southwest. a
chance of rain. waves 1 foot or less. 
.friday...west winds 10 knots or less becoming north. a chance of
rain friday night. waves 1 foot or less. 
.saturday...northeast winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds around 10 knots. waves 1 foot or less. 

$$

fzus61 kcle 182004
glfle 
expires:202511190315;;095454

open lake forecast for lake erie
national weather service cleveland oh
304 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley this evening into tonight. high pressure 30.10 inches
will build southeast over the region tonight through wednesday 
night before a cold front tracks east across the great lakes late 
thursday into friday. high pressure 29.90 inches will return to 
the great lakes over the weekend.


lez165>167-190315-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
304 pm est tue nov 18 2025

.tonight...southeast winds 10 knots or less becoming northeast.
rain likely early, then a chance of rain late this evening. a
slight chance of rain after midnight. waves 2 feet or less. 
.wednesday...northeast winds 5 to 15 knots. waves 1 to 2 feet. 
.wednesday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.thursday night...south winds 5 to 15 knots becoming southwest. a
chance of rain. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming north. waves 1 to
3 feet. 
.saturday...northeast winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus61 kcle 182004
glfle 
expires:202511190315;;095455

open lake forecast for lake erie
national weather service cleveland oh
304 pm est tue nov 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley this evening into tonight. high pressure 30.10 inches
will build southeast over the region tonight through wednesday 
night before a cold front tracks east across the great lakes late 
thursday into friday. high pressure 29.90 inches will return to 
the great lakes over the weekend.


lez061-168-169-190315-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
304 pm est tue nov 18 2025

.tonight...south winds 10 knots or less becoming northeast. a
chance of rain this evening, then a slight chance of rain after
midnight. waves 1 foot or less. 
.wednesday...northeast winds 10 knots or less. waves 2 feet or
less. 
.wednesday night...northeast winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds less than 10 knots becoming south.
waves 1 foot or less. 
.thursday night...south winds 5 to 15 knots becoming southwest.
rain likely overnight. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming north. waves 1 to
3 feet. 
.saturday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.sunday...southwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus63 kdtx 182050
glfsc 
expires:202511190500;;097569

lake st clair forecast
national weather service detroit/pontiac mi
350 pm est tue nov 18 2025

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, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lcz460-190500-
lake st clair-
350 pm est tue nov 18 2025

.tonight...northeast winds 5 to 10 knots. mostly cloudy with a
chance of light rain until early morning...then mostly clear early
in the morning. waves 2 feet or less.
.wednesday...northeast winds 5 to 10 knots until late afternoon
becoming light and variable. mostly sunny until late afternoon
becoming mostly cloudy. waves 2 feet or less.
.wednesday night...light and variable winds. mostly cloudy until
early morning becoming partly cloudy. waves nearly calm.
.thursday...light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. mostly cloudy. waves 2 feet or less.
.thursday night...south winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. mostly cloudy with a
chance of light rain. waves 2 feet or less.
.friday...northwest winds 10 to 15 knots diminishing to 5 to 10
knots in the afternoon and evening. partly sunny becoming mostly
sunny in the afternoon becoming partly cloudy. waves 2 feet or less.
.saturday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.sunday...west winds 10 to 15 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 182049
glflh 
expires:202511190500;;097567

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm est tue nov 18 2025

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, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lhz363-462>464-190500-
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-
349 pm est tue nov 18 2025

.tonight...light and variable winds becoming north 5 to 10 knots
in the late evening and overnight. waves 2 feet or less. 
.wednesday...north winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds becoming south 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.thursday...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. a chance of rain in
the afternoon. waves 1 to 3 feet building to 2 to 4 feet early in
the afternoon. 
.thursday night...southwest winds 15 to 20 knots. rain likely in
the evening...then a chance of rain after midnight. waves 3 to
5 feet. 
.friday...west winds 15 to 20 knots becoming northwest 5 to
10 knots. waves 3 to 5 feet. 
.saturday...northwest winds 5 to 10 knots backing to the
southwest until early evening...then increasing to 10 to 15 knots
in the late evening and early morning. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kdtx 182049
glflh 
expires:202511190500;;097566

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm est tue nov 18 2025

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, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lhz361-362-190500-
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-
349 pm est tue nov 18 2025

.tonight...northwest winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds becoming south 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.thursday...southwest winds 10 to 15 knots becoming south 15 to
20 knots early in the afternoon. a chance of rain in the
afternoon. waves 1 to 3 feet building to 2 to 4 feet early in the
afternoon. 
.thursday night...southwest winds 15 to 20 knots veering to the
west after midnight. rain likely in the evening. waves 3 to
5 feet. 
.friday...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 3 to 5 feet. 
.saturday...west winds 5 to 10 knots backing to the southwest
until early evening...then increasing to 10 to 15 knots in the
late evening and early morning. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kmkx 182049
glflm 
expires:202511190415;;097563

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cst tue nov 18 2025

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...

29.8 inch low pressure is positioned over the middle mississippi
valley this afternoon, resulting in breezy east winds across the 
southern half of lake michigan. winds are lighter further north, 
where higher surface pressure is in place. winds will gradually 
taper across all of the lake michigan late tonight through 
wednesday as 30.2 inch high pressure builds across the western 
great lakes. 29.6 inch low pressure will develop along the 
ontario-manitoba border wednesday night, deepening to near 29.5 
inches over the hudson bay by thursday afternoon. the low's 
development and progression will result in a southwest wind shift 
across lake michigan, with winds becoming gusty late thursday 
morning and afternoon. highest gusts are expected over the 
northern third of the waters, where 20-25 kt readings are 
currently forecast. gales aren't expected, though trends will 
continue to be monitored. a cold front will cross the waters 
thursday night, resulting in northwest winds friday into saturday 
morning. rain showers will continue into this afternoon over the 
southern half of lake michigan. a few wet snowflakes could mix in 
over the middle portion of the lake. additional rain is possible 
thursday, particularly over the northern third of the waters.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190415-
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-
249 pm cst tue nov 18 2025

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of sprinkles this evening. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.wednesday...east winds 10 to 15 kt becoming southeast 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming southwest.
waves 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt. chance of rain in the
afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.thursday night...west winds 10 to 20 kt becoming northwest.
chance of rain in the evening. waves 3 to 5 ft. 
.friday...northwest winds 10 to 20 kt. waves 3 to 5 ft. 
.friday night...north winds 10 to 15 kt becoming northeast. waves
1 to 3 ft. 
.saturday...southeast winds 10 to 15 kt becoming south. waves
1 to 3 ft. 
.sunday...west winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 182049
glflm 
expires:202511190415;;097562

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cst tue nov 18 2025

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...

29.8 inch low pressure is positioned over the middle mississippi
valley this afternoon, resulting in breezy east winds across the 
southern half of lake michigan. winds are lighter further north, 
where higher surface pressure is in place. winds will gradually 
taper across all of the lake michigan late tonight through 
wednesday as 30.2 inch high pressure builds across the western 
great lakes. 29.6 inch low pressure will develop along the 
ontario-manitoba border wednesday night, deepening to near 29.5 
inches over the hudson bay by thursday afternoon. the low's 
development and progression will result in a southwest wind shift 
across lake michigan, with winds becoming gusty late thursday 
morning and afternoon. highest gusts are expected over the 
northern third of the waters, where 20-25 kt readings are 
currently forecast. gales aren't expected, though trends will 
continue to be monitored. a cold front will cross the waters 
thursday night, resulting in northwest winds friday into saturday 
morning. rain showers will continue into this afternoon over the 
southern half of lake michigan. a few wet snowflakes could mix in 
over the middle portion of the lake. additional rain is possible 
thursday, particularly over the northern third of the waters.


lmz261-362-364-366-563-565-567-868-190415-
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-
249 pm cst tue nov 18 2025

sheboygan wi to pentwater mi north...

.tonight...northeast winds 5 to 10 kt becoming north. waves 1 to
2 ft. 
.wednesday...northwest winds less than 10 kt backing to
southwest. waves 1 ft or less. 
.wednesday night...southwest winds 10 to 15 kt increasing to
10 to 20 kt. waves 1 to 3 ft. 
.thursday...southwest winds 15 to 25 kt. chance of rain in the
morning, then rain likely in the afternoon. waves 3 to 5 ft. 
.thursday night...west winds 15 to 25 kt becoming northwest 10 to
20 kt. waves 3 to 5 ft. 
.friday...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.friday night...northwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.saturday...southwest winds 10 to 20 kt. waves 1 to 2 ft building
to 1 to 3 ft. 
.sunday...west winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100448

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz266-190900-
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-
420 pm est tue nov 18 2025

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by late
morning, then increasing to 10 to 20 knots by mid afternoon.
waves calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. a chance of rain showers after
midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday night...northwest winds 20 to 30 knots. a chance of
rain showers. waves building to 4 to 7 feet occasionally to
9 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a chance of rain showers in the
morning. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.friday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 15 to
25 knots. a chance of rain showers. waves building to 2 to
4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100449

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz267-190900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
420 pm est tue nov 18 2025

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots backing west late.
waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots backing southwest. waves
calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. a slight chance of rain showers after
midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. rain showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.thursday night...west winds 20 to 30 knots veering northwest
after midnight. rain showers likely in the evening, then a chance
of rain showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots. a chance of rain and
snow showers. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 15 to
25 knots. a chance of rain showers. waves building to 2 to
4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves 2 to 4 feet. 

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100444

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz162-190900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
420 pm est tue nov 18 2025 /320 pm cst tue nov 18 2025/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southwest winds less than 10 knots increasing to 5 to
15 knots by midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. a slight chance of rain showers in the afternoon. waves
building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight, then diminishing to 10 to 20 knots
late. a chance of rain showers in the evening, then rain showers
likely after midnight. waves building to 2 to 4 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of rain showers in the
morning. waves subsiding to 1 to 3 feet. 
.thursday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100445

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz263-190900-
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-
420 pm est tue nov 18 2025

.late this afternoon...northwest winds less than 10 knots. waves
calm to 2 feet. 
.tonight...west winds less than 10 knots becoming southwest 5 to
15 knots late. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. a chance of rain showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots veering west in the
afternoon. rain showers likely in the morning, then a slight
chance of rain showers in the afternoon. waves 3 to 5 feet
occasionally to 7 feet. 
.thursday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.friday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100446

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz264-190900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
420 pm est tue nov 18 2025

.late this afternoon...northwest winds less than 10 knots. waves
calm to 2 feet. 
.tonight...northwest winds less than 10 knots becoming west 5 to
15 knots by midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. a chance of rain showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots veering west in the
afternoon. rain showers in the morning, then a chance of rain
showers in the afternoon. waves 3 to 5 feet occasionally to
7 feet. 
.thursday night...northwest winds 15 to 25 knots backing west
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.friday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves building to 2 to 4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 182120 cca
glfls 
expires:202511190900;;100447

open lake forecast for lake superior...corrected
national weather service marquette mi
420 pm est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior as a 
28.8 inch low retrogrades back into far northern quebec. 30.2 inch 
ridging continues to encompass the great lakes basin wednesday, 
shifting into new england wednesday night and thursday as a 29.7 
inch low develops over northern ontario. high pressure ridging of 
around 30.1 inches develops over the northern plains and upper 
midwest on friday before moving into the great lakes region by 
saturday. meanwhile, troughing of 29.8 inches moves over lake
superior on saturday before weakening to 29.9 inches over the lake by
sunday morning. 



lsz265-190900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
420 pm est tue nov 18 2025

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. a chance of rain showers after
midnight. waves calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. rain showers likely. waves building to
2 to 4 feet. 
.thursday night...west winds 20 to 30 knots. waves 2 to 4 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 15 to
25 knots. waves calm to 2 feet. 
.sunday...west winds 15 to 25 knots. waves calm to 2 feet. 

$$