fzus61 kbuf 182002
glflo 
expires:202606190300;;975741

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu jun 18 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...an unseasonably strong 29.1 inch low will move across 
southern quebec through tonight. this low will then move slowly east 
to the canadian maritimes friday while filling to 29.4 inches, 
eventually moving east of newfoundland by saturday night. a weak 
ridge of high pressure averaging 29.9 inches will then build into 
the great lakes saturday night through sunday. a 29.6 inch low is 
then forecast to move over or just south of the lower great lakes 
monday, before moving off the new england coast by tuesday.


loz062-190300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu jun 18 2026

.tonight...west winds to 30 knots diminishing to 15 to 20 knots.
waves 5 to 9 feet subsiding to 4 to 7 feet. waves occasionally
around 11 feet. 
.friday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.friday night...west winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.saturday night...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.sunday...west winds 10 knots or less becoming southeast. a
chance of showers sunday night. waves 1 foot or less. 
.monday...east winds 10 to 15 knots becoming north. a chance of
showers. waves 1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots. waves 1 to 2 feet. 

$$

fzus61 kbuf 182002
glflo 
expires:202606190300;;975742

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu jun 18 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...an unseasonably strong 29.1 inch low will move across 
southern quebec through tonight. this low will then move slowly east 
to the canadian maritimes friday while filling to 29.4 inches, 
eventually moving east of newfoundland by saturday night. a weak 
ridge of high pressure averaging 29.9 inches will then build into 
the great lakes saturday night through sunday. a 29.6 inch low is 
then forecast to move over or just south of the lower great lakes 
monday, before moving off the new england coast by tuesday.


loz063>065-190300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu jun 18 2026

.tonight...west winds to 30 knots. waves 7 to 10 feet building to
9 to 12 feet, then subsiding to 7 to 10 feet. waves occasionally
around 15 feet. 
.friday...west winds 20 to 25 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.friday night...west winds 15 to 25 knots. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.saturday...west winds 15 to 20 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.saturday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.sunday...west winds 10 knots or less becoming south. a chance of
showers sunday night. waves 2 feet or less. 
.monday...southeast winds 5 to 15 knots becoming north. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms monday night. waves 2 feet or
less. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 182200
glfle 
expires:202606190215;;981015

open lake forecast for lake erie
national weather service cleveland oh
600 pm edt thu jun 18 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 trough averaging 29.60 inches lingers over the lake through 
friday before a high pressure ridge averaging 30.00 inches 
overspreads lake erie from the west on saturday through sunday. 
during sunday night through monday, a trough averaging 29.80 
inches should impact lake erie as the parent low wobbles east- 
northeastward from near the mid mississippi valley to near 
central new york and deepens to 29.60 inches. behind the low, a 
ridge averaging 30.00 inches should build from the north-central 
united states and vicinity monday night through this tuesday.


lez165>168-190215-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
600 pm edt thu jun 18 2026

.tonight...west winds 15 to 25 knots diminishing to 10 to
15 knots. waves 6 to 9 feet subsiding to 2 to 4 feet. waves
occasionally around 11 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 1 to 3 feet. 
.saturday night...west winds 5 to 10 knots becoming northwest. a
chance of showers. waves around 1 foot. 
.sunday...northwest winds 10 knots or less becoming east and
increasing to 15 to 20 knots. showers likely sunday night. waves
1 to 3 feet. 
.monday...east winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers during the day. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.tuesday...north winds 5 to 15 knots. waves 1 to 3 feet subsiding
to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 182200
glfle 
expires:202606190215;;981014

open lake forecast for lake erie
national weather service cleveland oh
600 pm edt thu jun 18 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 trough averaging 29.60 inches lingers over the lake through 
friday before a high pressure ridge averaging 30.00 inches 
overspreads lake erie from the west on saturday through sunday. 
during sunday night through monday, a trough averaging 29.80 
inches should impact lake erie as the parent low wobbles east- 
northeastward from near the mid mississippi valley to near 
central new york and deepens to 29.60 inches. behind the low, a 
ridge averaging 30.00 inches should build from the north-central 
united states and vicinity monday night through this tuesday.


lez162>164-190215-
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-
600 pm edt thu jun 18 2026

.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.friday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. a chance of thunderstorms
in the afternoon. waves 2 feet or less. 
.saturday night...west winds 5 to 15 knots becoming northwest.
waves 2 feet or less. 
.sunday...northwest winds 10 knots or less becoming east and
increasing to 15 to 20 knots. a chance of showers during the day,
then showers with a chance of thunderstorms sunday night. waves
2 feet or less building to 2 to 4 feet. 
.monday...east winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.tuesday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 182200
glfle 
expires:202606190215;;981016

open lake forecast for lake erie
national weather service cleveland oh
600 pm edt thu jun 18 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 trough averaging 29.60 inches lingers over the lake through 
friday before a high pressure ridge averaging 30.00 inches 
overspreads lake erie from the west on saturday through sunday. 
during sunday night through monday, a trough averaging 29.80 
inches should impact lake erie as the parent low wobbles east- 
northeastward from near the mid mississippi valley to near 
central new york and deepens to 29.60 inches. behind the low, a 
ridge averaging 30.00 inches should build from the north-central 
united states and vicinity monday night through this tuesday.


lez061-169-190215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
600 pm edt thu jun 18 2026

.tonight...west winds 15 to 25 knots diminishing to 10 to
15 knots. a slight chance of showers early. waves 7 to 10 feet
subsiding to 2 to 3 feet. waves occasionally around 13 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots.
a slight chance of showers late in the morning. a slight chance
of showers and thunderstorms in the afternoon. waves 2 to 4 feet.
.friday night...west winds 10 to 15 knots becoming northwest.
waves 2 to 4 feet subsiding to 1 to 2 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 2 feet. 
.saturday night...west winds 10 knots or less. a chance of
showers. waves 1 to 2 feet. 
.sunday...northwest winds less than 10 knots becoming east 10 to
15 knots. showers likely sunday night. waves 1 foot or less. 
.monday...east winds 15 to 20 knots becoming north 10 to
15 knots. showers likely with a chance of thunderstorms during
the day. waves 2 feet or less. 
.tuesday...north winds 5 to 10 knots becoming northwest. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 181957
glfsc 
expires:202606190400;;975491

lake st clair forecast
national weather service detroit/pontiac mi
357 pm edt thu jun 18 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...breezy west flow persists today before a ridge of high
pressure, 29.90 inches, builds in late tonight through tomorrow
morning. this will reduce winds speeds and gust potential through
the weekend. the next low pressure system, 29.60 inches, will
arrive late sunday into monday morning, bringins renewed rain and
thunderstorm chances along with elevated winds speeds across the
southern great lakes.


lcz460-190400-
lake st clair-
357 pm edt thu jun 18 2026

...small craft advisory in effect until 8 pm edt this evening...

.tonight...west winds 15 to 20 knots diminishing to 10 to 15 knots
in the late evening and overnight. mostly clear. waves 1 to 3 feet.
.friday...west winds 10 to 15 knots. sunny. waves 2 feet or less.
.friday night...northwest winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. mostly clear. waves 2 feet or less.
.saturday...west winds 5 to 10 knots. mostly sunny. a chance of
showers and thunderstorms early in the afternoon. waves 2 feet or
less.
.saturday night...northwest winds 5 to 10 knots. mostly clear. a
chance of light showers early in the evening. waves 2 feet or less.
.sunday...north winds 5 to 10 knots veering to the southeast in the
afternoon...then increasing to 10 to 15 knots in the evening. mostly
sunny becoming partly sunny in the afternoon becoming mostly cloudy.
showers likely in the evening. waves 2 feet or less.
.monday...north winds 20 to 25 knots with gusts to 30 knots. partly
cloudy. showers likely. waves 1 to 3 feet. a small craft advisory
may be needed.
.tuesday...northeast winds 10 to 15 knots. mostly clear. waves 2
feet or less.

$$

fzus63 kdtx 181957
glflh 
expires:202606190400;;975448

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt thu jun 18 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...breezy west flow persists today before a ridge of high
pressure, 29.90 inches, builds in late tonight through tomorrow
morning. this will reduce winds speeds and gust potential through
the weekend. the next low pressure system, 29.60 inches, will
arrive late sunday into monday morning, bringins renewed rain and
thunderstorm chances along with elevated winds speeds across the
southern great lakes.


lhz361-190400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 pm edt thu jun 18 2026

.tonight...west winds 15 to 20 knots decreasing to 10 to 15 knots
in the late evening and overnight. waves 2 to 4 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots
in the afternoon. waves 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming northwest 5 to
10 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight. 
.saturday...west winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...west winds 5 to 10 knots. waves 2 feet or less.
.sunday...west winds 5 to 10 knots. waves 2 feet or less. 
.monday...north winds 5 to 10 knots becoming northwest 10 to
15 knots . waves 1 to 3 feet. 
.tuesday...north winds 5 to 10 knots backing to the west early in
the evening...then veering to the northwest by midnight. waves
2 feet or less. 


$$

fzus63 kdtx 181957
glflh 
expires:202606190400;;975449

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt thu jun 18 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...breezy west flow persists today before a ridge of high
pressure, 29.90 inches, builds in late tonight through tomorrow
morning. this will reduce winds speeds and gust potential through
the weekend. the next low pressure system, 29.60 inches, will
arrive late sunday into monday morning, bringins renewed rain and
thunderstorm chances along with elevated winds speeds across the
southern great lakes.


lhz362-363-190400-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
357 pm edt thu jun 18 2026

.tonight...west winds 10 to 15 knots. waves 3 to 5 feet. 
.friday...west winds 10 to 15 knots. waves 3 to 5 feet. 
.friday night...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 3 to 5 feet. 
.saturday...west winds 5 to 10 knots early in the morning
becoming light and variable. waves 1 to 3 feet. 
.saturday night...light and variable winds becoming west 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.sunday...northwest winds 5 to 10 knots in the morning becoming
light and variable...then becoming east 5 to 10 knots late in the
evening. waves 2 feet or less. 
.monday...northeast winds 5 to 10 knots becoming north 10 to
15 knots. waves 1 to 3 feet. 
.tuesday...northwest winds 10 to 15 knots becoming light and
variable. waves 2 feet or less. 


$$

fzus63 kdtx 181957
glflh 
expires:202606190400;;975450

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt thu jun 18 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...breezy west flow persists today before a ridge of high
pressure, 29.90 inches, builds in late tonight through tomorrow
morning. this will reduce winds speeds and gust potential through
the weekend. the next low pressure system, 29.60 inches, will
arrive late sunday into monday morning, bringins renewed rain and
thunderstorm chances along with elevated winds speeds across the
southern great lakes.


lhz462>464-190400-
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-
357 pm edt thu jun 18 2026

.tonight...west winds 10 to 15 knots. waves 2 to 4 feet. 
.friday...west winds 10 to 15 knots decreasing to 5 to 10 knots
in the afternoon. waves 1 to 3 feet. 
.friday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.saturday...west winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.saturday night...light and variable winds. waves 2 feet or less.
.sunday...light and variable winds becoming northeast 5 to
10 knots late in the afternoon. waves 2 feet or less. 
.monday...east winds 10 to 15 knots backing to the north. a
chance of showers early in the morning. waves 2 to 4 feet. 
.tuesday...north winds 10 to 15 knots becoming light and
variable. waves 2 feet or less. 


$$

fzus63 kmkx 181958
glflm 
expires:202606190315;;975500

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
258 pm cdt thu jun 18 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...

northwest wind are expected to diminish this evening as low
pressure of 29.3 inches moves northeast through quebec and high 
pressure around 30.0 inches build into the mid mississippi valley.
light northwest wind are expected through friday morning. winds 
may briefly turn southwesterly friday night as weak low pressure 
around 29.9 inches moves through the region, but high pressure 
will rapidly regain dominance by saturday, keeping winds light and
variable. stronger low pressure will approach from the central 
plains on sunday, bringing more widespread rain and thunderstorms 
and turning winds to northeasterly. northeast winds will continue 
into early next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190315-
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-
258 pm cdt thu jun 18 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...northwest winds 10 to 20 kt backing to south 10 to
15 kt. waves 1 to 3 ft. 
.friday night...south winds 10 to 15 kt becoming west 10 to
20 kt. waves 1 to 2 ft. 
.saturday...west winds 10 to 20 kt. waves 1 to 3 ft. 
.saturday night...north winds 5 to 10 kt becoming northeast.
waves 1 to 2 ft. 
.sunday...east winds 10 to 15 kt becoming northeast 15 to 25 kt
in the afternoon. chance of showers. waves 1 ft or less building
to 2 to 4 ft. 
.sunday night...northeast winds to 30 kt. chance of showers.
waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.monday...northeast winds to 30 kt becoming north gales to 35 kt.
waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. waves 2 to 4 ft subsiding to 1 to 3 ft.  

$$

fzus63 kmkx 181958
glflm 
expires:202606190315;;975499

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
258 pm cdt thu jun 18 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...

northwest wind are expected to diminish this evening as low
pressure of 29.3 inches moves northeast through quebec and high 
pressure around 30.0 inches build into the mid mississippi valley.
light northwest wind are expected through friday morning. winds 
may briefly turn southwesterly friday night as weak low pressure 
around 29.9 inches moves through the region, but high pressure 
will rapidly regain dominance by saturday, keeping winds light and
variable. stronger low pressure will approach from the central 
plains on sunday, bringing more widespread rain and thunderstorms 
and turning winds to northeasterly. northeast winds will continue 
into early next week.


lmz261-362-364-366-563-565-567-868-190315-
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-
258 pm cdt thu jun 18 2026

sheboygan wi to pentwater mi north...

.tonight...southwest winds 10 to 20 kt becoming northwest. slight
chance of showers this evening. waves 1 to 3 ft. 
.friday...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.friday night...southwest winds 10 to 20 kt becoming west 5 to
10 kt. waves 1 to 3 ft. 
.saturday...west winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.saturday night...northwest winds 10 to 15 kt becoming north.
waves 1 ft or less. 
.sunday...north winds 5 to 10 kt increasing to 10 to 20 kt in the
afternoon. waves 1 to 2 ft. 
.sunday night...northeast winds 10 to 20 kt. waves 1 to 3 ft
building to 3 to 5 ft. 
.monday...north winds 15 to 25 kt increasing to 30 kt. waves 3 to
5 ft. 
.tuesday...north winds 10 to 15 kt becoming northwest. waves 1 to
2 ft.  

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975608

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz265-190800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu jun 18 2026

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...west winds 15 to 25 knots. waves building to 1 to
3 feet. 
.friday...west winds 15 to 25 knots diminishing to 5 to 15 knots.
waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. a slight chance of showers. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...west winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...north winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering west. waves calm to
2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975609

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz266-190800-
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 thu jun 18 2026

.late this afternoon...west winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.friday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.friday night...west winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots backing west
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.sunday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975606

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz263-190800-
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 thu jun 18 2026

.late this afternoon...west winds 10 to 20 knots. a slight chance
of showers and thunderstorms. waves 1 to 3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. a slight chance of showers through
midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west late.
a slight chance of showers through midnight. waves subsiding to
calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. a slight chance of showers. waves calm to 2 feet. 
.saturday night...southwest winds less than 10 knots veering west
after midnight. waves calm to 2 feet. 
.sunday...northwest winds less than 10 knots becoming northeast
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots diminishing to less than
10 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975605

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu jun 18 2026 /301 pm cdt thu jun 18 2026/

.late this afternoon...west winds 10 to 20 knots. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon. a chance of showers and a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975610

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz267-190800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu jun 18 2026

.late this afternoon...west winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves 2 to 4 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots backing west
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots becoming north 5 to
15 knots. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202606190800;;975607

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jun 18 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... 

29.2 inch low pressure currently over southern quebec by this 
afternoon slowly fills in on friday over the st. lawrence seaway 
while a 30.0 inch high builds over the mid-mississippi valley, 
persisting into saturday. 30.0 inch high pressure ridging develops 
over lake superior on saturday and remains through sunday as ridging 
progressively increases from northern canada. the ridging over lake 
superior increases to 30.2 inches by monday as the parent high in 
northern canada moves into western hudson bay. however, with a weak 
30.0 inch clipper low approaching lake superior on tuesday, expect 
the ridging over the lake to weaken to 30.1 inches by late in the 
day. the clipper low then arrives in lower michigan on wednesday. 




lsz264-190800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu jun 18 2026

.late this afternoon...west winds 10 to 20 knots. a slight chance
of showers and thunderstorms. waves 1 to 3 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots becoming west less
than 10 knots late. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots. a slight chance of showers
through early afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...west winds less than 10 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...north winds less than 10 knots increasing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.tuesday...west winds less than 10 knots. waves calm to 2 feet. 

$$