fzus61 kbuf 180209
glflo 
expires:202603180900;;875416

open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt tue mar 17 2026

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 30.4 inch surface high centered over the lower ohio 
valley will ridge northward, across the lake tonight. the high will 
then shift east of the lake wednesday and reach the east coast by 
wednesday evening. a 30.2 inch high will move into the great lakes 
region thursday. a 29.8 inch low will move from james bay to the 
canadian maritimes friday. this may result in a cold front crossing 
the lake through friday night while also sending a 29.8 inch sfc low 
across the lake through. a 30.2 inch sfc high over the southeast us 
will briefly ridge north to the lake saturday into early sunday 
before another cold front crosses the region.


loz063>065-180900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1009 pm edt tue mar 17 2026

.rest of tonight...northwest winds 15 to 25 knots diminishing to
10 to 15 knots. lake effect snow showers, then a chance of snow
showers late. waves 5 to 9 feet subsiding to 3 to 6 feet. waves
occasionally around 11 feet. 
.wednesday...west winds 5 to 10 knots becoming southeast. snow
showers likely early, then a chance of snow showers late in the
morning. waves 2 to 4 feet subsiding to 2 feet or less. 
.wednesday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. waves 2 feet or less building to 2 to 4 feet. 
.thursday...south winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...southwest winds around 10 knots becoming west.
a chance of rain showers. waves 2 feet or less. 
.friday...west winds 5 to 10 knots becoming north and increasing
to 15 to 25 knots. a chance of rain and snow showers friday
night. waves 1 to 3 feet building to 3 to 6 feet. 
.saturday...northeast winds to 30 knots becoming west. a chance
of rain and snow showers. waves 4 to 7 feet building to 7 to
10 feet. waves occasionally around 13 feet. 
.sunday...northwest winds to 30 knots. a chance of rain and snow
showers. waves 7 to 11 feet. waves occasionally around 14 feet. 

$$

fzus61 kbuf 180209
glflo 
expires:202603180900;;875415

open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt tue mar 17 2026

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 30.4 inch surface high centered over the lower ohio 
valley will ridge northward, across the lake tonight. the high will 
then shift east of the lake wednesday and reach the east coast by 
wednesday evening. a 30.2 inch high will move into the great lakes 
region thursday. a 29.8 inch low will move from james bay to the 
canadian maritimes friday. this may result in a cold front crossing 
the lake through friday night while also sending a 29.8 inch sfc low 
across the lake through. a 30.2 inch sfc high over the southeast us 
will briefly ridge north to the lake saturday into early sunday 
before another cold front crosses the region.


loz062-180900-
lake ontario open waters from the niagara river to hamlin beach-
1009 pm edt tue mar 17 2026

.rest of tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers late this evening. waves 4 to
7 feet subsiding to 2 to 4 feet. waves occasionally around
9 feet. 
.wednesday...southwest winds 5 to 15 knots becoming south. waves
1 to 3 feet. 
.wednesday night...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southwest. a
chance of rain showers in the afternoon. waves 1 to 3 feet. 
.thursday night...west winds 5 to 10 knots becoming northwest. a
chance of rain showers. waves 1 to 2 feet. 
.friday...west winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. a chance of rain showers during the
day, then a chance of rain and snow showers friday night. waves
1 to 3 feet building to 3 to 6 feet. 
.saturday...northeast winds 15 to 25 knots becoming west to
30 knots. a chance of rain and snow showers during the day, then
a chance of rain showers saturday night. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.sunday...northwest winds to 30 knots. a chance of rain and snow
showers. waves 6 to 9 feet subsiding to 5 to 8 feet. waves
occasionally around 11 feet. 

$$

fzus61 kcle 180128
glfle 
expires:202603180830;;874434

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt tue mar 17 2026

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...
a high pressure ridge averaging 30.40 inches builds eastward
across lake erie tonight and then exits slowly toward the east and
south wednesday through saturday. in addition, a warm front will
sweep northward across lake erie wednesday night. on sunday, a
cold front should sweep southward across lake erie as a low moves
northeastward from southern quebec toward labrador and deepens to
29.00 inches. 


lez061-168-169-180830-
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-
928 pm edt tue mar 17 2026

.rest of tonight...west winds 5 to 15 knots becoming southwest. a
chance of snow showers late this evening, then a chance of snow
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...southwest winds 5 to 10 knots becoming south. a
chance of snow early. waves 1 to 3 feet. 
.wednesday night...south winds 5 to 15 knots. waves 1 to 2 feet. 
.thursday...south winds 5 to 10 knots becoming west. a chance of
rain. waves 1 to 2 feet. 
.thursday night...west winds 10 knots or less. a chance of rain
in the evening. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming southeast. a
chance of rain friday night. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming north. a chance
of rain and snow during the day. waves 2 to 4 feet building to
3 to 5 feet, then subsiding to 2 to 4 feet. 

$$

fzus61 kcle 180128
glfle 
expires:202603180830;;874432

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt tue mar 17 2026

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...
a high pressure ridge averaging 30.40 inches builds eastward
across lake erie tonight and then exits slowly toward the east and
south wednesday through saturday. in addition, a warm front will
sweep northward across lake erie wednesday night. on sunday, a
cold front should sweep southward across lake erie as a low moves
northeastward from southern quebec toward labrador and deepens to
29.00 inches. 


lez162>164-180830-
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-
928 pm edt tue mar 17 2026

.rest of tonight...west winds 10 to 15 knots becoming southwest.
a slight chance of snow showers late this evening. waves 1 to
3 feet. 
.wednesday...south winds 10 to 15 knots. a slight chance of snow
late in the morning. waves 1 to 2 feet. 
.wednesday night...south winds 10 to 15 knots becoming southwest.
waves 1 to 2 feet. 
.thursday...southwest winds 5 to 10 knots. rain likely. waves
2 feet or less. 
.thursday night...southwest winds 5 to 10 knots becoming
northeast. a chance of rain in the evening. waves 1 foot or less.
.friday...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 15 to 20 knots becoming north. waves
1 to 3 feet building to 2 to 4 feet. 

$$

fzus61 kcle 180128
glfle 
expires:202603180830;;874433

open lake forecast for lake erie
national weather service cleveland oh
928 pm edt tue mar 17 2026

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...
a high pressure ridge averaging 30.40 inches builds eastward
across lake erie tonight and then exits slowly toward the east and
south wednesday through saturday. in addition, a warm front will
sweep northward across lake erie wednesday night. on sunday, a
cold front should sweep southward across lake erie as a low moves
northeastward from southern quebec toward labrador and deepens to
29.00 inches. 


lez165>167-180830-
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-
928 pm edt tue mar 17 2026

.rest of tonight...west winds 10 to 15 knots becoming southwest.
a chance of snow showers late this evening, then a slight chance
of snow after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.wednesday...south winds 10 to 15 knots. a slight chance of snow
early. waves 1 to 3 feet. 
.wednesday night...south winds 10 to 15 knots. waves 1 to 3 feet.
.thursday...south winds 5 to 15 knots becoming west. a chance of
rain in the morning, then rain likely in the afternoon. waves
1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots becoming north.
rain likely in the evening. waves 1 foot or less. 
.friday...southeast winds 5 to 15 knots. a chance of rain friday
night. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet building to 2 to 4 feet. 
.sunday...southwest winds 15 to 20 knots becoming north. a chance
of rain during the day. waves 3 to 5 feet. 

$$

fzus63 kdtx 180149
glfsc 
expires:202603181000;;874749

lake st clair forecast
national weather service detroit/pontiac mi
949 pm edt tue mar 17 2026

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 ridge of high pressure averaging 30.20 inches will
provide light winds tonight. moderate southerly winds return
tomorrow as a warm front lifts through the central great lakes
region. light winds on thursday as a weakening cold front
approaches and washes out.


lcz460-181000-
lake st clair-
949 pm edt tue mar 17 2026

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

$$

fzus63 kdtx 180148
glflh 
expires:202603181000;;874746

open lake forecast for lake huron
national weather service detroit/pontiac mi
948 pm edt tue mar 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 ridge of high pressure averaging 30.20 inches will
provide light winds tonight. moderate southerly winds return
tomorrow as a warm front lifts through the central great lakes
region. light winds on thursday as a weakening cold front
approaches and washes out.


lhz363-462>464-181000-
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-
948 pm edt tue mar 17 2026

.rest of tonight...west winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the morning. 
.wednesday...south winds 10 to 15 knots increasing to 15 to
25 knots in the late morning and afternoon. waves 1 to 3 feet 
building to 4 to 6 feet in the late morning and afternoon. waves 
occasionally around 8 feet. 
.wednesday night...south winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. waves 4 to 6 feet. 
.thursday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. a chance of rain and
snow. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and afternoon. waves occasionally around 8 feet. 
.thursday night...west winds 5 to 10 knots becoming west after
midnight. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the morning...then backing to the east late in
the evening. a chance of rain late in the morning. waves 1 to
3 feet. 
.saturday...north winds 10 to 15 knots veering to the south until
early evening...then increasing to 15 to 20 knots by midnight.
waves 3 to 5 feet. 
.sunday...west winds 15 to 20 knots veering to the north. a
chance of rain and snow until afternoon. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kdtx 180148
glflh 
expires:202603181000;;874745

open lake forecast for lake huron
national weather service detroit/pontiac mi
948 pm edt tue mar 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 ridge of high pressure averaging 30.20 inches will
provide light winds tonight. moderate southerly winds return
tomorrow as a warm front lifts through the central great lakes
region. light winds on thursday as a weakening cold front
approaches and washes out.


lhz361-362-181000-
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-
948 pm edt tue mar 17 2026

.rest of tonight...southwest winds 10 to 15 knots backing to the
south early in the morning. waves 3 to 5 feet subsiding to 1 to
3 feet early in the morning. 
.wednesday...south winds 10 to 15 knots increasing to 20 to
25 knots with gusts to around 30 knots. freezing spray in the
afternoon. waves 2 to 4 feet building to 6 to 9 feet. waves
occasionally around 12 feet. 
.wednesday night...south winds 15 to 20 knots becoming southwest
10 to 15 knots after midnight. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.thursday...southwest winds 10 to 15 knots. waves 3 to 5 feet
subsiding to 1 to 3 feet early in the afternoon. 
.thursday night...west winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...southwest winds 10 to 15 knots backing to the east late
in the afternoon. a chance of snow in the morning...then a chance
of rain and snow. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...north winds 15 to 20 knots veering to the southeast
until early evening...then veering to the south by midnight. a
chance of snow by midnight. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.sunday...north winds 15 to 20 knots increasing to 20 to 25 knots
in the late morning and early afternoon...then decreasing to
15 to 20 knots . a chance of snow and rain until afternoon. waves
5 to 7 feet. waves occasionally around 10 feet. 

wave heights are for ice free areas.

$$

fzus63 kmkx 180145
glflm 
expires:202603180915;;874686

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
845 pm cdt tue mar 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...

light to moderate southwest to south winds are expected across 
the lake as high pressure around 30.2 inches moves east north east from
southern illinois toward the southern new england states. a 
modest to breezy southwest winds will prevail into wednesday 
night as low pressure of 29.7 inches progresses through the 
southern canadian prairies into ontario. a weak cold front will 
then slowly pass thursday into thursday evening with light and 
variable winds.


lmz261-362-364-366-563-565-567-868-180915-
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-
845 pm cdt tue mar 17 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 10 to 15 kt increasing to
15 to 25 kt. slight chance of snow through early evening, then
chance of snow overnight. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.wednesday...south winds 15 to 25 kt becoming southwest. chance
of snow with areas of light freezing drizzle in the morning, then
chance of snow in the afternoon. waves 4 to 7 ft occasionally to
9 ft building to 6 to 9 ft occasionally to 12 ft. 
.wednesday night...southwest winds 15 to 25 kt diminishing to
10 to 15 kt. chance of rain showers, light freezing rain and snow
showers overnight. waves 4 to 7 ft occasionally to 9 ft subsiding
to 2 to 4 ft. 
.thursday...west winds 5 to 10 kt veering to north. chance of
light freezing rain in the morning. waves 1 to 3 ft. 
.thursday night...north winds 5 to 10 kt backing to southwest
10 to 15 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
chance of rain and snow showers. waves 2 to 4 ft. 
.friday night...east winds 10 to 20 kt becoming southeast 10 to
15 kt. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...northeast winds 15 to 25 kt becoming north. chance of
snow. waves 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 180145
glflm 
expires:202603180915;;874687

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
845 pm cdt tue mar 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...

light to moderate southwest to south winds are expected across 
the lake as high pressure around 30.2 inches moves east north east from
southern illinois toward the southern new england states. a 
modest to breezy southwest winds will prevail into wednesday 
night as low pressure of 29.7 inches progresses through the 
southern canadian prairies into ontario. a weak cold front will 
then slowly pass thursday into thursday evening with light and 
variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180915-
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-
845 pm cdt tue mar 17 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southwest winds 10 to 20 kt becoming south
15 to 25 kt. chance of snow overnight. waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft. 
.wednesday...south winds 15 to 25 kt becoming southwest. chance
of snow with areas of light freezing drizzle in the morning.
waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...southwest winds 10 to 20 kt diminishing to
5 to 10 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft. 
.thursday...south winds 5 to 10 kt backing to north. chance of
rain showers. waves 1 to 2 ft. 
.thursday night...north winds 5 to 10 kt veering to south. waves
1 to 2 ft. 
.friday...south winds 10 to 15 kt becoming southwest. waves 1 to
3 ft. 
.friday night...northwest winds 10 to 15 kt becoming northeast.
waves 2 to 4 ft. 
.saturday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.sunday...west winds 15 to 25 kt becoming north. waves 6 to 9 ft
occasionally to 12 ft.  

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874987

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



lsz264-180800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt tue mar 17 2026

.rest of tonight...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a slight chance of snow showers. waves
calm to 2 feet building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...south winds 10 to 20 knots veering southwest in the
afternoon, then becoming west 15 to 25 knots late. a slight
chance of snow showers through early afternoon. waves building to
3 to 6 feet occasionally to 8 feet. 
.wednesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then veering north late. a slight
chance of rain showers through midnight. waves subsiding to 1 to
3 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. a chance of snow
showers. a chance of rain showers after midnight. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...north winds 5 to 15 knots veering northeast by mid
afternoon. a chance of rain showers. waves building to 1 to
3 feet. 
.friday night...east winds 10 to 20 knots veering south after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday...southeast winds 10 to 20 knots becoming northeast
20 to 30 knots. a chance of snow showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.sunday...north winds 15 to 25 knots diminishing to 10 to
20 knots. freezing spray. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874988

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



lsz265-180800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt tue mar 17 2026

.rest of tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a slight chance of snow showers after
midnight. waves calm to 2 feet building to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots veering southwest in the
afternoon, then becoming west 10 to 20 knots late. a slight
chance of snow showers through early afternoon. waves subsiding
to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots veering northwest
late. a slight chance of rain and snow showers. waves calm to
2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of snow showers. a chance
of rain showers after midnight. waves calm to 2 feet. 
.friday...north winds 15 to 25 knots veering northeast by mid
afternoon. a chance of snow showers through early afternoon. a
chance of rain showers. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots veering south after
midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming north 20 to
30 knots. a chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...north winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874985

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt tue mar 17 2026 /900 pm cdt tue mar 17 2026/

.rest of tonight...south winds 15 to 25 knots veering southwest
late. a chance of snow showers. waves 1 to 3 feet building to
3 to 5 feet occasionally to 7 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.wednesday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight, then veering north late. a slight
chance of rain showers. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. a chance of snow
and rain showers. waves calm to 2 feet. 
.friday...northeast winds 10 to 20 knots. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering south after
midnight. waves building to 1 to 3 feet. 
.saturday...east winds 10 to 20 knots becoming northeast 15 to
25 knots. a chance of rain and snow showers. waves building to
3 to 5 feet occasionally to 7 feet. 
.sunday...north winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874990

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



lsz267-180800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt tue mar 17 2026

.rest of tonight...southwest winds 10 to 20 knots backing south
after midnight, then increasing to 15 to 25 knots late. a slight
chance of snow showers. waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...south winds 20 to 30 knots becoming southwest 15 to
25 knots late. a chance of snow showers. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.wednesday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering west late. a slight
chance of snow showers. a slight chance of freezing rain after
midnight. waves subsiding to 1 to 3 feet. 
.thursday...north winds 10 to 20 knots backing northwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. a chance of snow showers after
midnight. waves building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots backing east by mid
afternoon. a chance of snow showers. a chance of rain showers by
mid afternoon. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.friday night...east winds 15 to 25 knots veering southeast after
midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of snow showers, possibly mixed with rain.
waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of snow showers. freezing spray. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874989

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



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-
1000 pm edt tue mar 17 2026

.rest of tonight...southwest winds 10 to 20 knots becoming south
15 to 25 knots after midnight, then increasing to 20 to 30 knots
late. a chance of snow showers. freezing spray after midnight.
waves 1 to 3 feet building to 3 to 6 feet occasionally to 8 feet.
.wednesday...south winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon. freezing spray through early
afternoon. a chance of snow showers. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering northwest late. a slight
chance of rain and snow showers. a slight chance of freezing rain
after midnight. waves subsiding to 1 to 3 feet. 
.thursday...north winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.thursday night...southwest winds 10 to 20 knots becoming south
15 to 25 knots after midnight. a chance of snow showers. a chance
of rain showers after midnight. waves building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots backing northeast by mid
afternoon. a chance of rain and snow showers. waves subsiding to
1 to 3 feet. 
.friday night...east winds 15 to 25 knots veering south after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday...south winds 20 to 30 knots backing northeast. a
chance of snow showers, possibly mixed with rain. waves building
to 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202603180800;;874986

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 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...

a 30.1 ridge departing the upper great lakes this evening gives way 
to a weakening 29.7 inch clipper low moving across the canadian 
prairies and northern ontario tonight into wednesday. behind this 
low, weak ridging of around 30.1 inches returns over lake superior 
on thursday ahead of another clipper low approaching the region on 
friday at around 29.7 inches. another pair of clipper lows moving 
through the plains and northern ontario this weekend brings 
troughing down to around 29.6 inches over lake superior by saturday 
ahead of a cold front, before ridging behind the front increases up 
to around 30.4 inches by sunday.



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-
1000 pm edt tue mar 17 2026

.rest of tonight...south winds 10 to 20 knots. a chance of snow
showers. waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 15 to
25 knots late. a slight chance of snow showers through early
afternoon. waves 3 to 5 feet occasionally to 7 feet. 
.wednesday night...west winds 5 to 15 knots veering north late. a
slight chance of rain showers. waves subsiding to calm to 2 feet.
.thursday...northeast winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. a chance of snow
and rain showers. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of snow
showers. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...southeast winds 10 to 20 knots becoming northeast
20 to 30 knots. a chance of snow showers, possibly mixed with
rain. waves building to 4 to 7 feet occasionally to 9 feet. 
.sunday...north winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$