fzus61 kbuf 200802
glflo 
expires:202610201500;;874391

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue oct 20 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...30.4 inch high pressure will maintain influence over the 
lower great lakes this week. the high may briefly weaken to 30.2 
inches wednesday and thursday.


loz062-201500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt tue oct 20 2026

.today...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northeast winds 5 to 10 knots becoming east. waves
1 to 2 feet. 
.wednesday...east winds 10 knots or less becoming northeast.
waves 1 to 2 feet. 
.wednesday night...light and variable winds becoming northwest
5 to 10 knots. waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. waves 1 foot or less building to
2 to 4 feet. 
.friday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet subsiding to 1 foot or less. 
.saturday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 

$$

fzus61 kbuf 200802
glflo 
expires:202610201500;;874392

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue oct 20 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...30.4 inch high pressure will maintain influence over the 
lower great lakes this week. the high may briefly weaken to 30.2 
inches wednesday and thursday.


loz063>065-201500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue oct 20 2026

.today...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.tonight...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.wednesday...east winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.wednesday night...light and variable winds becoming northwest
5 to 10 knots. waves 1 foot or less. 
.thursday...north winds 5 to 15 knots becoming northeast and
increasing to 15 to 25 knots. waves 2 feet or less building to
3 to 5 feet. 
.friday...northeast winds 15 to 20 knots becoming southeast and
diminishing to 5 to 10 knots. waves 3 to 5 feet subsiding to
1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 

$$

fzus61 kcle 200740
glfle 
expires:202610201415;;873724

open lake forecast for lake erie
national weather service cleveland oh
340 am edt tue oct 20 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 30.40 inches remains in control this week. the high
will briefly weaken to 30.20 inches wednesday and thursday.


lez162-163-201415-
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 am edt tue oct 20 2026

.today...northeast winds 10 knots or less becoming east. waves
1 foot or less. 
.tonight...east winds 5 to 15 knots. waves 1 to 3 feet. 
.wednesday...northeast winds less than 10 knots. waves 1 to
3 feet subsiding to 1 foot or less. 
.wednesday night...light and variable winds. waves 1 foot or
less. 
.thursday...north winds 10 knots or less becoming northeast and
increasing to 15 to 20 knots. waves 2 feet or less. 
.friday...northeast winds 10 to 15 knots becoming southeast.
waves 2 feet or less. 
.saturday...southeast winds 10 knots or less becoming south.
waves 2 feet or less. 

$$

fzus61 kcle 200740
glfle 
expires:202610201415;;873725

open lake forecast for lake erie
national weather service cleveland oh
340 am edt tue oct 20 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 30.40 inches remains in control this week. the high
will briefly weaken to 30.20 inches wednesday and thursday.


lez164>168-201415-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
340 am edt tue oct 20 2026

.today...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...northeast winds 15 to 20 knots becoming east 10 to
15 knots. waves 2 to 4 feet. 
.wednesday...east winds 10 knots or less becoming northeast.
waves 1 to 3 feet. 
.wednesday night...northeast winds 10 knots or less becoming
north. waves 1 foot or less. 
.thursday...north winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. waves 1 foot or less building to
1 to 3 feet. 
.friday...east winds 5 to 15 knots becoming southeast. waves 1 to
3 feet. 
.saturday...southeast winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 

$$

fzus61 kcle 200740
glfle 
expires:202610201415;;873726

open lake forecast for lake erie
national weather service cleveland oh
340 am edt tue oct 20 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 30.40 inches remains in control this week. the high
will briefly weaken to 30.20 inches wednesday and thursday.


lez061-169-201415-
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-
340 am edt tue oct 20 2026

.today...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...northeast winds 15 to 20 knots becoming east 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...east winds 10 knots or less becoming northeast.
waves 1 to 3 feet subsiding to 1 foot or less. 
.wednesday night...northeast winds less than 10 knots. waves
1 foot or less. 
.thursday...north winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. waves 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots becoming southeast. waves
1 to 3 feet subsiding to 1 foot or less. 
.saturday...southeast winds 10 knots or less becoming south.
waves 2 feet or less. 

$$

fzus63 kdtx 200733
glfsc 
expires:202610201545;;873479

lake st clair forecast
national weather service detroit/pontiac mi
333 am edt tue oct 20 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...high pressure, 30.50 inches, drifts from the northern
great lakes to southern quebec over the next 24 hours. a dry cold
front washes out over the area wednesday night, then another area
of high pressure then stalls overhead through the end of the
week.


lcz460-201545-
lake st clair-
333 am edt tue oct 20 2026

.today...northeast winds 5 to 10 knots in the morning becoming light
and variable. mostly sunny. waves 2 feet or less.
.tonight...light and variable winds becoming east 5 to 10 knots in
the late evening and overnight. mostly clear. waves 2 feet or less.
.wednesday...northeast winds 5 to 10 knots until late afternoon
becoming light and variable. sunny. waves 2 feet or less.
.wednesday night...light and variable winds. clear. waves nearly
calm.
.thursday...north winds 5 to 10 knots becoming northeast 15 to 20
knots. clear. waves 2 feet or less.
.friday...east winds 10 to 15 knots. clear. waves 2 feet or less.
.saturday...southeast winds 5 to 10 knots. mostly clear. waves 2
feet or less.

$$

fzus63 kdtx 200732
glflh 
expires:202610201545;;873466

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am edt tue oct 20 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...high pressure, 30.50 inches, drifts from the northern
great lakes to southern quebec over the next 24 hours. a dry cold
front washes out over the area wednesday night, then another area
of high pressure then stalls overhead through the end of the
week.


lhz363-462>464-201545-
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-
332 am edt tue oct 20 2026

.today...east winds 10 to 15 knots decreasing to 5 to 10 knots in
the afternoon. waves 1 to 3 feet. 
.tonight...northeast winds 5 to 10 knots becoming southeast 10 to
15 knots after midnight. waves 1 to 3 feet. 
.wednesday...southeast winds 10 to 15 knots becoming south 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.wednesday night...southeast winds 5 to 10 knots veering to the
southwest by midnight...then veering to the northwest after
midnight. waves 2 feet or less. 
.thursday...north winds 10 to 15 knots veering to the northeast
late in the evening. waves 1 to 3 feet. 
.friday...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday...southeast winds 5 to 10 knots becoming south 10 to
15 knots . waves 1 to 3 feet building to 2 to 4 feet by midnight.


$$

fzus63 kdtx 200732
glflh 
expires:202610201545;;873465

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am edt tue oct 20 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...high pressure, 30.50 inches, drifts from the northern
great lakes to southern quebec over the next 24 hours. a dry cold
front washes out over the area wednesday night, then another area
of high pressure then stalls overhead through the end of the
week.


lhz361-362-201545-
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-
332 am edt tue oct 20 2026

.today...east winds 10 to 15 knots. waves 2 to 4 feet. 
.tonight...east winds 5 to 10 knots veering to the south early in
the morning. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots. waves 1 to 3 feet. 
.wednesday night...south winds 5 to 10 knots veering to the
northwest after midnight. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots becoming light and
variable...then becoming northeast 5 to 10 knots late in the
evening. waves 2 feet or less. 
.friday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots . waves 1 to 3 feet building to 2 to 4 feet by midnight.


$$

fzus63 kmkx 200811
glflm 
expires:202610201530;;875444

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
311 am cdt tue oct 20 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...

high pressure of 30.5 centered over the upper great lakes region
will slowly drift east through wednesday with amother high
pressure of 30.4 moving in from the great plains and replacing it
later this week. winds will remain light through to moderate
through the week. east winds will prevail today, southerly winds 
on wednesday, and light and variable winds on thursday. breezy 
southerlies may finally return saturday as low pressure moves 
through the central plains of canada toward hudson bay.


lmz261-362-364-366-563-565-567-868-201530-
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-
311 am cdt tue oct 20 2026

sheboygan wi to pentwater mi north...

.today...east winds 10 to 20 kt becoming southeast. waves 1 to
3 ft. 
.tonight...southeast winds 10 to 20 kt becoming south. waves 1 to
3 ft. 
.wednesday...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.wednesday night...southwest winds 10 to 15 kt veering to north.
waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt. waves 1 ft or less. 
.thursday night...east winds 5 to 10 kt becoming southeast. waves
1 to 3 ft. 
.friday...southeast winds 10 to 20 kt becoming south. waves 2 to
4 ft. 
.saturday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 200811
glflm 
expires:202610201530;;875445

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
311 am cdt tue oct 20 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...

high pressure of 30.5 centered over the upper great lakes region
will slowly drift east through wednesday with amother high
pressure of 30.4 moving in from the great plains and replacing it
later this week. winds will remain light through to moderate
through the week. east winds will prevail today, southerly winds 
on wednesday, and light and variable winds on thursday. breezy 
southerlies may finally return saturday as low pressure moves 
through the central plains of canada toward hudson bay.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201530-
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-
311 am cdt tue oct 20 2026

sheboygan wi to pentwater mi south...

.today...east winds 5 to 10 kt. patchy dense fog this morning.
waves 1 ft or less. 
.tonight...east winds 5 to 10 kt becoming south. waves 1 to 2 ft.
.wednesday...south winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday night...south winds 5 to 10 kt veering to west. waves
1 ft or less. 
.thursday...northeast winds 5 to 10 kt. waves 1 ft or less. 
.thursday night...northeast winds 5 to 10 kt becoming southeast.
waves 1 to 2 ft building to 1 to 3 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 200800
glfls 
expires:202610202000;;874291

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz266-202000-
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-
400 am edt tue oct 20 2026

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 10 to 20 knots. waves building to 1 to
3 feet. 
.tonight...south winds 15 to 25 knots veering southwest late.
waves building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering northwest late. a slight
chance of showers. waves subsiding to calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...south winds 15 to 25 knots increasing to 20 to
30 knots. waves building to 2 to 4 feet. 
.saturday...south gales to 40 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202610202000;;874287

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue oct 20 2026 /300 am cdt tue oct 20 2026/

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...southeast winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.tonight...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west late.
waves calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots increasing
to 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 5 to 15 knots becoming south 15 to 25 knots.
waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 20 to
30 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 200800
glfls 
expires:202610202000;;874292

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue oct 20 2026

.early this morning...southeast winds 10 to 20 knots. waves calm
to 2 feet. 
.today...southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. a slight
chance of showers by mid afternoon. waves subsiding to calm to
2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...south winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday...south winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202610202000;;874288

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz263-202000-
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-
400 am edt tue oct 20 2026

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 2 to 4 feet. 
.saturday...south winds 20 to 30 knots veering southwest. waves
building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202610202000;;874289

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue oct 20 2026

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight. waves building to 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots veering west in the
afternoon, then becoming northwest 5 to 15 knots late. a slight
chance of showers through early afternoon. waves subsiding to
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds less than 10 knots becoming southeast 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...south winds 10 to 20 knots. waves building to 2 to
4 feet. 
.saturday...south winds 20 to 30 knots becoming southwest 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202610202000;;874290

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 30.4 inch high over lake superior and northeastern ontario shifts 
east today. this high builds to 30.5 inches over western quebec this 
afternoon as a 29.9 inch low moves from northern manitoba into 
western hudson bay. wednesday morning, the high weakens slightly to 
30.4 inches but expands over much of southern quebec while the low 
deepens to 29.7 inches over eastern hudson bay. meanwhile, a 30.3 
inch high moves over the north dakota/manitoba/saskatchewan 
tripoint. with the low moving across northern quebec, the highs 
merge into a 30.3 inch high over the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low approaches lake winnipeg.




lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue oct 20 2026

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then becoming north 5 to 15 knots
late. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.friday...south winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.saturday...south gales to 35 knots becoming southwest 20 to
30 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 

$$