fzus61 kbuf 172002
glflo 
expires:202506180300;;913296

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue jun 17 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 29.4 inch low pressure passing to our north will encourage a warm 
front to lift towards the lake while deepening to 29.2 inches as it 
advances across quebec tonight. another wave of low pressure 
averaging 29.5 is then forecast to track northeast towards the 
central great lakes along this frontal boundary on wednesday. this 
low is forecast to drag its cold front across the lake thursday. a 
30.1 inch high builds northeast across the lake friday, and exits 
east of the lake on saturday.


loz063>065-180300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue jun 17 2025

.tonight...southeast winds 10 to 15 knots becoming south. waves
2 feet or less. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms in the afternoon. waves
2 feet or less. 
.wednesday night...south winds 10 knots or less increasing to
10 to 15 knots. a chance of showers and thunderstorms in the
evening, then showers likely overnight. waves 2 feet or less. 
.thursday...south winds 15 to 20 knots becoming west. showers
likely with a chance of thunderstorms in the morning, then
showers likely in the afternoon. waves 1 to 3 feet building to
3 to 6 feet. 
.thursday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers in the evening. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.friday...west winds 5 to 10 knots becoming southwest. waves 1 to
3 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers during the day, then a chance of showers and
thunderstorms saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 172002
glflo 
expires:202506180300;;913295

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue jun 17 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 29.4 inch low pressure passing to our north will encourage a warm 
front to lift towards the lake while deepening to 29.2 inches as it 
advances across quebec tonight. another wave of low pressure 
averaging 29.5 is then forecast to track northeast towards the 
central great lakes along this frontal boundary on wednesday. this 
low is forecast to drag its cold front across the lake thursday. a 
30.1 inch high builds northeast across the lake friday, and exits 
east of the lake on saturday.


loz062-180300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt tue jun 17 2025

.tonight...southeast winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots becoming south. waves
1 foot or less. 
.wednesday night...southeast winds 5 to 15 knots becoming
southwest 15 to 20 knots. showers likely with a chance of
thunderstorms. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...southwest winds 15 to 20 knots becoming west. showers
likely in the morning, then a chance of showers in the afternoon.
waves 3 to 5 feet. 
.thursday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers in the evening. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.friday...west winds 10 to 15 knots becoming southwest. waves
1 to 2 feet. 
.saturday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers during the day, then a chance of
showers and thunderstorms saturday night. waves 1 to 3 feet
building to 2 to 4 feet. 
.sunday...southwest winds 10 to 15 knots. a chance of showers
during the day. waves 2 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171951
glfle 
expires:202506180215;;912680

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt tue jun 17 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 centered over the northern great lakes deepens to 
29.40 inches and will drag a cold front east across lake erie on 
wednesday night. high pressure 30.00 inches will build across the 
region this weekend.


lez162>164-180215-
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-
351 pm edt tue jun 17 2025

.tonight...south winds around 10 knots becoming southwest. a
slight chance of showers and thunderstorms. waves 1 foot or less.
.wednesday...southwest winds 10 to 15 knots. a slight chance of
showers and thunderstorms through early afternoon, then a chance
of showers and thunderstorms late. waves 2 feet or less. 
.wednesday night...south winds 10 to 15 knots becoming southwest
15 to 20 knots. showers and thunderstorms. waves 1 to 3 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers and thunderstorms. waves 1 to
3 feet. 
.thursday night...west winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.friday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171951
glfle 
expires:202506180215;;912682

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt tue jun 17 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 centered over the northern great lakes deepens to 
29.40 inches and will drag a cold front east across lake erie on 
wednesday night. high pressure 30.00 inches will build across the 
region this weekend.


lez061-168-169-180215-
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-
351 pm edt tue jun 17 2025

.tonight...south winds 5 to 10 knots. a slight chance of showers
and thunderstorms. waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots. a slight chance of
showers and thunderstorms early, then a chance of showers and
thunderstorms from late morning on. waves 1 foot or less. 
.wednesday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. showers and thunderstorms likely. waves 1 to
3 feet building to 2 to 4 feet. 
.thursday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers and thunderstorms. waves 2 to
4 feet. 
.thursday night...west winds 5 to 15 knots becoming southwest.
waves 2 to 4 feet subsiding to 1 to 2 feet. 
.friday...southwest winds 5 to 10 knots. waves 1 to 2 feet. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171951
glfle 
expires:202506180215;;912681

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt tue jun 17 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 centered over the northern great lakes deepens to 
29.40 inches and will drag a cold front east across lake erie on 
wednesday night. high pressure 30.00 inches will build across the 
region this weekend.


lez165>167-180215-
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-
351 pm edt tue jun 17 2025

.tonight...south winds 5 to 10 knots becoming southwest. a slight
chance of showers and thunderstorms. waves 1 to 2 feet. 
.wednesday...southwest winds 5 to 10 knots. a slight chance of
showers and thunderstorms in the morning, then a chance of
showers and thunderstorms in the afternoon. waves 1 to 2 feet. 
.wednesday night...south winds 10 to 15 knots becoming southwest
15 to 20 knots. showers and thunderstorms. waves 1 to 3 feet
building to 3 to 5 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers and thunderstorms. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 10 knots becoming southwest.
waves 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots. waves 1 to 2 feet. 
.saturday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 171943
glfsc 
expires:202506180345;;912321

lake st clair forecast
national weather service detroit/pontiac mi
343 pm edt tue jun 17 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...a low pressure system lifting across eastern ontario
has draped a warm sector over the central great lakes. a few
showers and thunderstorms are possible late today and into the
overnight hours. a stronger low lifts into the region wednesday
providing several rounds of thunderstorms, some of which may be
severe. active pattern could continue through the end of the week
as the system's cold front stalls across the great lakes thursday
followed by another weak low heading into the weekend.


lcz460-180345-
lake st clair-
343 pm edt tue jun 17 2025

.tonight...south winds 10 to 15 knots becoming southwest 5 to 10
knots after midnight. partly cloudy. waves 2 feet or less.
.wednesday...south winds 5 to 10 knots increasing to 10 to 15 knots
late in the afternoon. partly sunny. a chance of thunderstorms in
the afternoon. some thunderstorms may produce heavy rainfall in the
afternoon. waves 2 feet or less.
.wednesday night...southwest winds 15 to 20 knots. mostly cloudy.
showers likely and a chance of thunderstorms in the evening.. then
light showers likely after midnight. some thunderstorms may produce
heavy rainfall in the evening. locally heavy rainfall possible in
the evening. waves 1 to 3 feet.
.thursday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots in the late morning and afternoon. partly sunny. waves 1 to
3 feet.
.thursday night...west winds 5 to 10 knots backing to the southwest
after midnight. mostly clear. waves 2 feet or less.
.friday...southwest winds 5 to 10 knots increasing to 10 to 15 knots
in the evening. mostly sunny becoming partly cloudy. waves 2 feet or
less.
.saturday...southwest winds 15 to 20 knots. partly cloudy. waves 1
to 3 feet.
.sunday...southwest winds 15 to 20 knots. clear. waves 2 feet or
less.

$$

fzus63 kdtx 171942
glflh 
expires:202506180345;;912267

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt tue jun 17 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...a low pressure system lifting across eastern ontario
has draped a warm sector over the central great lakes. a few
showers and thunderstorms are possible late today and into the
overnight hours. a stronger low lifts into the region wednesday
providing several rounds of thunderstorms, some of which may be
severe. active pattern could continue through the end of the week
as the system's cold front stalls across the great lakes thursday
followed by another weak low heading into the weekend.


lhz361-362-180345-
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-
342 pm edt tue jun 17 2025

.tonight...north winds 5 to 10 knots in the evening becoming
light and variable. waves 1 to 3 feet. 
.wednesday...light and variable winds becoming east 5 to 10 knots
late in the afternoon. showers likely in the afternoon. waves
2 feet or less. 
.wednesday night...northeast winds 5 to 10 knots becoming north
10 to 15 knots in the late evening and overnight. showers and a
chance of thunderstorms in the evening...then showers likely
after midnight. some thunderstorms may produce heavy rainfall in
the evening. waves 2 feet or less. 
.thursday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and afternoon. a chance of showers.
waves 2 to 4 feet. 
.thursday night...west winds 5 to 10 knots backing to the south
after midnight. a chance of showers after midnight. waves 1 to
3 feet. 
.friday...south winds 5 to 10 knots backing to the southeast late
in the afternoon...then becoming south 10 to 15 knots late in the
evening. a chance of thunderstorms late in the morning. a chance
of showers. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots early in the evening decreasing to
5 to 10 knots in the late evening and early morning. showers
likely early in the morning. a chance of thunderstorms until
early evening. a chance of showers early in the evening. waves
2 to 4 feet. 
.sunday...south winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet. 


$$

fzus63 kdtx 171942
glflh 
expires:202506180345;;912268

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt tue jun 17 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...a low pressure system lifting across eastern ontario
has draped a warm sector over the central great lakes. a few
showers and thunderstorms are possible late today and into the
overnight hours. a stronger low lifts into the region wednesday
providing several rounds of thunderstorms, some of which may be
severe. active pattern could continue through the end of the week
as the system's cold front stalls across the great lakes thursday
followed by another weak low heading into the weekend.


lhz363-462>464-180345-
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-
342 pm edt tue jun 17 2025

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


$$

fzus63 kmkx 171925
glflm 
expires:202506180315;;911853

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
225 pm cdt tue jun 17 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... 

low pressure around 29.5 inches will move from ontario into 
quebec this evening. its cold front extending southward over 
eastern upper michigan and wisconsin will weaken and stall as it 
moves over lake michigan late this afternoon and evening. 

another low pressure area of 29.7 inches will track from northern
missouri to southern lake michigan on wednesday, followed by a
weak ridge of high pressure by thursday afternoon.

expect light to modest southerly winds becoming light and 
variable late today and tonight as the front weakens and stalls 
over the lake. variable winds are expected for wednesday as low 
pressure moves across southern lake michigan in the afternoon.  
modest north to northwest winds are then forecast in the wake of 
the low for wednesday night into thursday morning then turning 
westerly.


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-
225 pm cdt tue jun 17 2025

sheboygan wi to pentwater mi north...

.tonight...southwest winds 10 to 15 kt backing to southeast.
patchy fog overnight. slight chance of showers overnight. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday...southeast winds 5 to 10 kt becoming east late in the
morning, then becoming 10 to 20 kt early in the afternoon
becoming northeast late. patchy fog. chance of showers and slight
chance of thunderstorms in the morning, then showers with a
chance of thunderstorms in the afternoon. waves 1 to 2 ft
building to 1 to 3 ft. 
.wednesday night...northeast winds 15 to 25 kt becoming north
late in the evening, then becoming northwest 10 to 20 kt after
midnight diminishing to 10 to 15 kt late. patchy fog in the
evening. showers likely with a chance of thunderstorms in the
evening. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...west winds 10 to 20 kt becoming southwest. waves 1 to
2 ft. 
.thursday night...southwest winds 10 to 15 kt. chance of showers
and thunderstorms in the evening, then chance of showers
overnight. waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt becoming south. chance of
showers. waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt increasing to 15 to
25 kt. chance of showers and thunderstorms. waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft. 
.saturday...south winds to 30 kt. chance of showers and
thunderstorms. waves 4 to 7 ft occasionally to 9 ft. 
.sunday...south winds 15 to 25 kt increasing to 30 kt. waves 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 171925
glflm 
expires:202506180315;;911854

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
225 pm cdt tue jun 17 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... 

low pressure around 29.5 inches will move from ontario into 
quebec this evening. its cold front extending southward over 
eastern upper michigan and wisconsin will weaken and stall as it 
moves over lake michigan late this afternoon and evening. 

another low pressure area of 29.7 inches will track from northern
missouri to southern lake michigan on wednesday, followed by a
weak ridge of high pressure by thursday afternoon.

expect light to modest southerly winds becoming light and 
variable late today and tonight as the front weakens and stalls 
over the lake. variable winds are expected for wednesday as low 
pressure moves across southern lake michigan in the afternoon.  
modest north to northwest winds are then forecast in the wake of 
the low for wednesday night into thursday morning then turning 
westerly.


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-
225 pm cdt tue jun 17 2025

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt becoming southwest 10 to 15 kt
late this evening, then becoming west 5 to 10 kt after midnight
backing to southeast 10 to 15 kt late. chance of showers and
thunderstorms. patchy fog overnight. waves 1 to 2 ft. 
.wednesday...southeast winds 10 to 15 kt increasing to 10 to
20 kt late in the morning, then becoming southeast 10 to 20 kt
early in the afternoon becoming east 15 to 25 kt late. patchy
fog. chance of showers and thunderstorms in the morning, then
showers likely with a chance of thunderstorms in the afternoon.
waves 1 to 3 ft. 
.wednesday night...northwest winds 15 to 25 kt diminishing to
10 to 20 kt. patchy fog in the evening. chance of showers and
thunderstorms in the evening, then chance of showers overnight.
waves 3 to 5 ft. 
.thursday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday night...southwest winds 10 to 15 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt becoming south. waves 1 to
3 ft. 
.friday night...south winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft. 
.saturday...south winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.sunday...south winds 15 to 25 kt. waves 4 to 7 ft occasionally
to 9 ft.  

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913222

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



lsz265-180800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue jun 17 2025

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing east in the
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering west after
midnight, then veering northwest late. a slight chance of showers
through midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots veering northeast by mid
afternoon. a chance of showers by mid afternoon. waves calm to
2 feet. 
.thursday night...southeast winds 5 to 15 knots. a chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.friday...southeast winds 10 to 20 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots. showers and a
chance of thunderstorms. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots veering southeast. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.sunday...south winds 15 to 25 knots veering southwest. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913223

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



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 tue jun 17 2025

.late this afternoon...west winds 10 to 20 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...south winds 5 to 15 knots veering southwest late.
patchy fog after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing northeast in
the afternoon, then veering east late. a chance of showers.
patchy fog by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots backing
northwest after midnight. a slight chance of rain showers. waves
calm to 2 feet. 
.thursday...north winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.friday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots. a chance of
showers through midnight. a chance of thunderstorms. showers
after midnight. waves building to 1 to 3 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers
and thunderstorms. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.sunday...south winds 15 to 25 knots. a chance of showers. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913224

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



lsz267-180800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue jun 17 2025

.late this afternoon...west winds 10 to 20 knots. patchy fog.
waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to
4 feet. 
.tonight...south winds 5 to 15 knots. patchy fog. waves subsiding
to calm to 2 feet. 
.wednesday...south winds 5 to 15 knots backing east in the
afternoon, then backing northeast late. a chance of showers.
patchy dense fog by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots backing north
after midnight, then becoming northwest 10 to 20 knots late. a
chance of rain showers. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.friday...south winds 10 to 20 knots backing southeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots. a chance of
showers through midnight. showers after midnight. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots. showers likely. a
chance of thunderstorms. a chance of showers. waves building to
1 to 3 feet. 
.sunday...south winds 15 to 25 knots. a chance of showers. waves
building to 2 to 4 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913219

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue jun 17 2025 /301 pm cdt tue jun 17 2025/

.late this afternoon...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing south late. patchy
dense fog through early afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots veering west after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. a chance of showers through early
afternoon, then showers likely and a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. showers likely
through midnight. a chance of thunderstorms. a chance of showers
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots backing northeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.friday night...northeast winds 10 to 20 knots. showers and a
chance of thunderstorms. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots becoming southwest 15 to
25 knots. a chance of showers and thunderstorms. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913220

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



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 tue jun 17 2025

.late this afternoon...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then diminishing to less than 10 knots
late. waves subsiding to calm to 2 feet. 
.wednesday...west winds less than 10 knots becoming south 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots becoming west less
than 10 knots after midnight, then becoming north 5 to 15 knots
late. a slight chance of showers after midnight. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. showers likely
through midnight. a chance of thunderstorms. a chance of showers
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.friday night...east winds 5 to 15 knots. showers and a chance of
thunderstorms. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering southwest. a chance
of showers and thunderstorms. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202506180800;;913221

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 17 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...

a 29.5 inch low over far northeastern ontario will continue 
departing to the northeast, reaching northern quebec by wednesday 
morning at 29.3 inches. meanwhile, weak ridging gradually builds 
over lake superior in the wake of this low, rising to 29.8 inches 
over the lake by wednesday morning. by late wednesday, a 29.6 inch 
low approaches lake michigan from the southwest while another 29.7 
inch trough approaches lake superior from the northwest. these two 
features merge into a 29.5 inch low over georgian bay wednesday 
night while a 30.0 inch high moves over northern ontario. weak 30.0 
inch ridging then remains over lake superior until friday. on 
saturday, a 29.6 inch trough moves over lake superior.



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 tue jun 17 2025

.late this afternoon...southwest winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering west late. waves subsiding
to calm to 2 feet. 
.wednesday...west winds less than 10 knots backing south in the
afternoon. patchy fog through early afternoon. waves calm to
2 feet. 
.wednesday night...southeast winds less than 10 knots veering
northwest after midnight, then becoming north 5 to 15 knots late.
a slight chance of rain showers after midnight. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.friday...southeast winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. a chance of
showers through midnight. showers after midnight. waves calm to
2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. a chance
of showers. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming southwest 10 to
20 knots. a chance of showers. waves building to 2 to 4 feet. 

$$