fzus61 kbuf 172002
glflo 
expires:202609180300;;618665

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 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 weak front stalled just south of the lake this evening 
will move southeast and away from the lake overnight. a 30.3 inch 
high will then build from northwest ontario province friday to 
southern quebec saturday, then off the new england coast saturday 
night. a weak 29.9 inch low is then forecast to move east across 
ohio and pennsylvania late saturday night through sunday. another 
30.3 inch high will then build from northwest ontario province 
sunday night to quebec by tuesday and wednesday while gradually 
strengthening to 30.6 inches.


loz062-180300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu sep 17 2026

.tonight...northwest winds 5 to 15 knots becoming north. waves
1 to 2 feet. 
.friday...north winds 5 to 15 knots diminishing to less than
10 knots. waves 2 feet or less. 
.friday night...north winds 5 to 15 knots becoming east 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet. 
.saturday...east winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday night...east winds 10 to 15 knots. a chance of showers
overnight. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. a chance of showers during the day. waves 1 to 3 feet
building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots. waves 5 to 8 feet.
waves occasionally around 10 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers. waves 5 to 9 feet. waves occasionally around 11 feet. 

$$

fzus61 kbuf 172002
glflo 
expires:202609180300;;618666

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 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 weak front stalled just south of the lake this evening 
will move southeast and away from the lake overnight. a 30.3 inch 
high will then build from northwest ontario province friday to 
southern quebec saturday, then off the new england coast saturday 
night. a weak 29.9 inch low is then forecast to move east across 
ohio and pennsylvania late saturday night through sunday. another 
30.3 inch high will then build from northwest ontario province 
sunday night to quebec by tuesday and wednesday while gradually 
strengthening to 30.6 inches.


loz063>065-180300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu sep 17 2026

.tonight...northwest winds 5 to 15 knots becoming north. waves
2 feet or less. 
.friday...north winds 10 to 15 knots. waves 1 to 3 feet. 
.friday night...north winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...east winds 5 to 10 knots. a chance of showers
overnight. waves 2 feet or less. 
.sunday...east winds 10 to 15 knots becoming northeast and
increasing to 15 to 25 knots. a chance of showers during the day.
waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.tuesday...northeast winds 15 to 25 knots becoming east. a chance
of showers. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 

$$

fzus61 kcle 171940
glfle 
expires:202609180215;;618019

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt thu sep 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...
high pressure 30.20 inches will build south 
across the great lakes into friday. low pressure 29.90 inches will 
track east across the great lakes on saturday and extend a cold 
front through the area on sunday. a trough averaging 29.90 inches 
will linger behind the front into early next week.


lez164>167-180215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
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-
340 pm edt thu sep 17 2026

.tonight...north winds 10 knots or less becoming northeast 10 to
15 knots. waves 2 feet or less building to 2 to 3 feet. 
.friday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...northeast winds 5 to 15 knots becoming east.
waves 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
1 to 3 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast.
showers. waves 1 to 3 feet. 
.sunday...northeast winds 15 to 25 knots. showers likely during
the day. waves 2 to 4 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.monday...east winds to 30 knots becoming northeast. a chance of
showers monday night. waves 7 to 11 feet. waves occasionally
around 14 feet. 
.tuesday...east winds to 30 knots. a chance of showers. waves
7 to 11 feet subsiding to 6 to 9 feet. waves occasionally around
14 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171940
glfle 
expires:202609180215;;618020

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt thu sep 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...
high pressure 30.20 inches will build south 
across the great lakes into friday. low pressure 29.90 inches will 
track east across the great lakes on saturday and extend a cold 
front through the area on sunday. a trough averaging 29.90 inches 
will linger behind the front into early next week.


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-
340 pm edt thu sep 17 2026

.tonight...northwest winds 10 knots or less becoming northeast
10 to 15 knots. waves 2 feet or less. 
.friday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.friday night...northeast winds 10 to 15 knots becoming east.
waves 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...east winds 5 to 15 knots. showers likely in the
evening, then showers overnight. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. a chance of showers during the day. waves 1 to 3 feet
building to 3 to 6 feet. 
.monday...northeast winds to 30 knots becoming east. a chance of
showers monday night. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.tuesday...east winds to 30 knots diminishing to 15 to 25 knots.
a chance of showers. waves 5 to 8 feet. waves occasionally around
10 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171940
glfle 
expires:202609180215;;618018

open lake forecast for lake erie
national weather service cleveland oh
340 pm edt thu sep 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...
high pressure 30.20 inches will build south 
across the great lakes into friday. low pressure 29.90 inches will 
track east across the great lakes on saturday and extend a cold 
front through the area on sunday. a trough averaging 29.90 inches 
will linger behind the front into early next week.


lez162-163-180215-
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-
340 pm edt thu sep 17 2026

.tonight...northeast winds 10 knots or less increasing to 10 to
15 knots. a slight chance of showers and thunderstorms. waves
1 to 3 feet. 
.friday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday night...northeast winds 10 to 15 knots becoming east.
waves 2 feet or less. 
.saturday...east winds around 10 knots. showers likely. waves
2 feet or less. 
.saturday night...east winds around 10 knots becoming northeast.
showers. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. showers likely with a chance of thunderstorms during
the day. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.monday...northeast winds to 30 knots. a chance of showers. waves
6 to 9 feet. waves occasionally around 11 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers. waves 5 to 9 feet subsiding to 4 to 7 feet. waves
occasionally around 11 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 171950
glfsc 
expires:202609180400;;618202

lake st clair forecast
national weather service detroit/pontiac mi
350 pm edt thu sep 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...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lcz460-180400-
lake st clair-
350 pm edt thu sep 17 2026

.tonight...northeast winds 5 to 10 knots becoming north 10 to 15
knots in the late evening and overnight. partly cloudy. waves 2 feet
or less.
.friday...north winds 10 to 15 knots becoming northeast 5 to 10
knots early in the afternoon...then increasing to 10 to 15 knots
late in the afternoon. mostly sunny. waves 2 feet or less.
.friday night...northeast winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. partly cloudy early in
the evening becoming mostly cloudy. waves 1 to 3 feet.
.saturday...east winds 10 to 15 knots diminishing to 5 to 10 knots
in the late morning and early afternoon...then increasing to 10 to
15 knots early in the afternoon. mostly cloudy with showers likely.
waves 2 feet or less.
.saturday night...east winds 10 to 15 knots. light showers .. then
showers likely after midnight. waves 2 feet or less.
.sunday...northeast winds 10 to 15 knots increasing to 15 to 20
knots in the evening. mostly cloudy with showers likely in the
morning...then partly cloudy with a chance of light showers in the
afternoon and evening. waves 1 to 3 feet.
.monday...northeast winds to 30 knots. mostly cloudy. waves 2 to 4
feet. a small craft advisory may be needed.
.tuesday...northeast winds to 30 knots. partly cloudy. a chance of
showers. waves 2 to 4 feet.

$$

fzus63 kdtx 171950
glflh 
expires:202609180400;;618198

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt thu sep 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...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lhz361-180400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
350 pm edt thu sep 17 2026

.tonight...light and variable winds becoming northwest 5 to
10 knots late in the evening...then increasing to 10 to 15 knots
after midnight. waves 2 feet or less. 
.friday...northeast winds 10 to 15 knots becoming light and
variable. waves 2 feet or less. 
.friday night...light and variable winds becoming east 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming southeast 10 to
15 knots in the late morning and early afternoon...then becoming
east 5 to 10 knots early in the afternoon. waves 2 feet or less. 
.saturday night...east winds 5 to 10 knots early in the evening
becoming light and variable...then becoming northeast 5 to
10 knots after midnight. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots becoming northeast 15 to
20 knots with gusts to around 30 knots late in the evening. waves
2 feet or less building to 3 to 5 feet late in the evening. 
.monday...northeast winds 15 to 20 knots becoming east 10 to
15 knots in the late morning and early afternoon...then becoming
northeast 5 to 10 knots early in the evening becoming east 15 to
20 knots by midnight. waves 3 to 5 feet subsiding to 1 to 3 feet
early in the evening...then building to 2 to 4 feet by midnight. 
.tuesday...east winds 15 to 20 knots decreasing to 10 to 15 knots
with gusts to around 30 knots . waves 3 to 5 feet. 


$$

fzus63 kdtx 171950
glflh 
expires:202609180400;;618199

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt thu sep 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...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lhz362-363-180400-
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-
350 pm edt thu sep 17 2026

.tonight...light and variable winds becoming north 15 to
20 knots. waves 2 feet or less. 
.friday...north winds 15 to 20 knots becoming northeast 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
afternoon. 
.friday night...northeast winds 5 to 10 knots veering to the east
after midnight. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots. a chance of showers in the
morning. waves 2 feet or less. 
.saturday night...east winds 5 to 10 knots backing to the
northeast after midnight. a chance of showers in the evening.
waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots increasing to 20 to
25 knots late in the evening. waves 1 to 3 feet building to 5 to
7 feet. waves occasionally around 10 feet. 
.monday...northeast winds 15 to 20 knots. gusts to 30 knots early
in the evening. waves 4 to 6 feet. 
.tuesday...east winds 15 to 20 knots. gusts to 30 knots. waves
4 to 6 feet. 


$$

fzus63 kdtx 171950
glflh 
expires:202609180400;;618200

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt thu sep 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...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lhz462>464-180400-
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-
350 pm edt thu sep 17 2026

.tonight...north winds 5 to 10 knots increasing to 10 to 15 knots
after midnight. waves 1 to 3 feet. 
.friday...north winds 15 to 20 knots decreasing to 10 to 15 knots
in the late morning and afternoon. waves 2 to 4 feet. 
.friday night...northeast winds 10 to 15 knots veering to the
east after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet
after midnight. 
.saturday...east winds 10 to 15 knots becoming southeast 5 to
10 knots in the late morning and afternoon. a chance of showers.
waves 2 feet or less. 
.saturday night...east winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. a chance of showers. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 20 to
25 knots. waves 1 to 3 feet building to 4 to 6 feet. waves
occasionally around 8 feet. 
.monday...northeast winds 15 to 20 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.tuesday...northeast winds 15 to 20 knots becoming east 20 to
25 knots by midnight. waves 3 to 5 feet. 


$$

fzus63 kmkx 171946
glflm 
expires:202609180315;;618143

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
246 pm cdt thu sep 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 and variable winds over the north half of the lake this
afternoon and light northeast winds over the south half, will 
become a steady and modest east northeast wind over the entire 
lake tonight and friday. this will occur as an area of 30.4 inch 
high pressure will shift from manitoba into ontario. 

29.9 inch low pressure will develop near the middle missouri 
river friday afternoon then gradually shifting to the northern 
ohio valley for saturday afternoon and night, and persist into
early next week. breezy east southeast winds will develop over 
the south half of the lake friday night and saturday becoming
northeast late saturday night into early next week. widespread 
showers and storms will accompany the approaching and passing low 
friday night through at least saturday night, with widespread 
severe weather not expected.


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-
246 pm cdt thu sep 17 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 10 to 20 kt becoming northeast. slight
chance of drizzle this evening. waves 2 to 4 ft. 
.friday...east winds 10 to 20 kt becoming northeast. waves 3 to
5 ft. 
.friday night...east winds 10 to 20 kt increasing to 30 kt.
chance of showers in the evening, then showers overnight. waves
2 to 4 ft building to 6 to 9 ft occasionally to 12 ft. 
.saturday...southeast winds to 30 kt. showers. waves 8 to 11 ft
occasionally to 14 ft. 
.saturday night...east winds 10 to 20 kt becoming northeast.
showers. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.sunday...northeast winds 15 to 25 kt increasing to 30 kt. chance
of showers. waves 6 to 9 ft occasionally to 12 ft building to
8 to 11 ft occasionally to 14 ft. 
.sunday night...northeast winds to 30 kt becoming east. chance of
showers. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft. 
.monday...east winds to 30 kt becoming northeast. chance of
showers. waves 8 to 11 ft occasionally to 14 ft building to 8 to
12 ft occasionally to 16 ft. 
.tuesday...east winds 15 to 25 kt becoming northeast. waves 6 to
9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 171946
glflm 
expires:202609180315;;618142

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
246 pm cdt thu sep 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 and variable winds over the north half of the lake this
afternoon and light northeast winds over the south half, will 
become a steady and modest east northeast wind over the entire 
lake tonight and friday. this will occur as an area of 30.4 inch 
high pressure will shift from manitoba into ontario. 

29.9 inch low pressure will develop near the middle missouri 
river friday afternoon then gradually shifting to the northern 
ohio valley for saturday afternoon and night, and persist into
early next week. breezy east southeast winds will develop over 
the south half of the lake friday night and saturday becoming
northeast late saturday night into early next week. widespread 
showers and storms will accompany the approaching and passing low 
friday night through at least saturday night, with widespread 
severe weather not expected.


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-
246 pm cdt thu sep 17 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft. 
.friday...northeast winds 10 to 20 kt. chance of showers in the
afternoon. waves 2 to 4 ft. 
.friday night...east winds 10 to 20 kt becoming southeast 15 to
25 kt. showers likely in the evening, then showers overnight.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.saturday...southeast winds 15 to 25 kt becoming east. chance of
showers. waves 6 to 9 ft occasionally to 12 ft. 
.saturday night...east winds 10 to 20 kt becoming northeast.
chance of showers. waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft. 
.sunday...northeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 5 to 8 ft occasionally
to 10 ft. 
.sunday night...northeast winds to 30 kt becoming east 15 to
25 kt. waves 6 to 9 ft occasionally to 12 ft. 
.monday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618576

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then veering east late. waves building
to 1 to 3 feet. 
.friday...east winds 10 to 20 knots. a slight chance of showers
by mid afternoon. waves 1 to 3 feet. 
.friday night...east winds 10 to 20 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.saturday...east winds 15 to 25 knots backing northeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots becoming east gales to
35 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...east winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.tuesday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618577

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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 thu sep 17 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then veering east late. waves building
to 1 to 3 feet. 
.friday...east winds 5 to 15 knots. waves 1 to 3 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...east winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618578

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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 thu sep 17 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...north winds 5 to 15 knots veering northeast after
midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.sunday night...northeast winds 10 to 20 knots veering east after
midnight. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.monday...east winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618579

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering northeast after
midnight, then increasing to 15 to 25 knots late. waves calm to
2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
late. waves building to 1 to 3 feet. 
.friday night...southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming north 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northeast winds 20 to 30 knots becoming east
15 to 25 knots after midnight. waves 2 to 4 feet. 
.monday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618580

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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 thu sep 17 2026

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight, then becoming northeast 15 to 25 knots late. waves
building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming north 15 to
25 knots after midnight. waves calm to 2 feet. 
.sunday...northeast winds 20 to 30 knots backing north by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.sunday night...northeast winds 15 to 25 knots veering east after
midnight. waves 2 to 4 feet. 
.monday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.tuesday...east winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202609180800;;618581

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

30.4 inch ridging continues to move over lake superior tonight into 
friday as a high presure center moves eastward across southern 
ontario. ridging weakens to 30.1 saturday before restrenghtening 
with the southward motion and strengthening of a high pressure 
center over central ontario sunday, reaching 30.3 inches early 
monday morning. 30.3 inch ridging remains over the area through 
wednesday next week.




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

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

$$