fzus61 kbuf 050802
glflo 
expires:202605051500;;042497

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue may 5 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 29.1 inch low over hudson bay today will weaken to 
29.3 inches as it moves to northern quebec through wednesday. a 
trailing wavy cold front will slowly cross the lake late this 
afternoon, then drift across new england wednesday and out to sea 
thursday. a 30.1 inch high over the tennessee and ohio valleys 
thursday night will slide to the mid-atlantic coastline friday.


loz063>065-051500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue may 5 2026

.today...southwest winds 15 to 20 knots becoming west. a chance
of showers this morning, then a chance of showers and
thunderstorms early this afternoon. showers likely with a chance
of thunderstorms late. waves 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming southeast and
diminishing to 10 knots or less after midnight. showers with a
chance of thunderstorms early, then showers from late evening on.
waves 1 to 3 feet. 
.wednesday...east winds 5 to 10 knots becoming northwest.
showers. waves 1 foot or less. 
.wednesday night...west winds 5 to 10 knots. a chance of showers
in the evening. waves 2 feet or less. 
.thursday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.friday...west winds 5 to 15 knots becoming south. a chance of
showers friday night. waves 1 to 3 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. showers
likely. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 050802
glflo 
expires:202605051500;;042496

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue may 5 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 29.1 inch low over hudson bay today will weaken to 
29.3 inches as it moves to northern quebec through wednesday. a 
trailing wavy cold front will slowly cross the lake late this 
afternoon, then drift across new england wednesday and out to sea 
thursday. a 30.1 inch high over the tennessee and ohio valleys 
thursday night will slide to the mid-atlantic coastline friday.


loz062-051500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt tue may 5 2026

.today...southwest winds 15 to 20 knots becoming west. a chance
of showers early. a chance of showers early this afternoon, then
showers likely late. waves 2 to 3 feet. 
.tonight...west winds 15 to 20 knots becoming southeast and
diminishing to 5 to 10 knots. showers. waves 1 to 3 feet
subsiding to 1 foot or less. 
.wednesday...east winds 5 to 10 knots becoming south. showers
likely. waves 1 foot or less. 
.wednesday night...west winds 5 to 10 knots. waves 1 foot or
less. 
.thursday...west winds 5 to 10 knots. waves 2 feet or less. 
.friday...west winds 5 to 15 knots becoming southwest. a chance
of showers friday night. waves 1 to 2 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 

$$

fzus61 kcle 050750
glfle 
expires:202605051430;;042114

open lake forecast for lake erie
national weather service cleveland oh
350 am edt tue may 5 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...
low pressure 29.10 inches moving across hudson bay this morning
will drag a cold front across lake erie late this morning. the
front will slowly exit the region tonight allowing high pressure 
30.10 inches to slowly build east over the region late wednesday 
and thursday. weak low pressure 29.80 inches will move east 
across the great lakes friday into saturday, dragging a cold front
across the lake.


lez162>166-051430-
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-
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-
350 am edt tue may 5 2026

.today...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of rain this morning, then rain with a slight
chance of thunderstorms this afternoon. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 10 knots becoming northeast. rain
with a slight chance of thunderstorms early, then rain from late
evening on. waves 2 feet or less. 
.wednesday...northeast winds 5 to 10 knots becoming northwest.
rain likely in the morning, then a chance of showers in the
afternoon. waves 2 feet or less. 
.wednesday night...southwest winds 5 to 10 knots becoming
northwest. waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
1 foot or less building to 1 to 3 feet. 
.friday...southwest winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers
during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 050750
glfle 
expires:202605051430;;042115

open lake forecast for lake erie
national weather service cleveland oh
350 am edt tue may 5 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...
low pressure 29.10 inches moving across hudson bay this morning
will drag a cold front across lake erie late this morning. the
front will slowly exit the region tonight allowing high pressure 
30.10 inches to slowly build east over the region late wednesday 
and thursday. weak low pressure 29.80 inches will move east 
across the great lakes friday into saturday, dragging a cold front
across the lake.


lez061-167>169-051430-
ripley to buffalo ny extending from 5nm 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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
350 am edt tue may 5 2026

.today...southwest winds 15 to 20 knots becoming west 5 to
15 knots. a chance of showers this morning, then rain with a
chance of thunderstorms this afternoon. waves 3 to 5 feet. 
.tonight...west winds 10 knots or less becoming northeast. rain
with a slight chance of thunderstorms early, then rain from late
evening on. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.wednesday...northeast winds 5 to 10 knots becoming north. rain
likely in the morning, then a chance of showers in the afternoon.
waves 2 feet or less. 
.wednesday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.friday...southwest winds 5 to 15 knots. a chance of showers
friday night. waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers
during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 050704
glfsc 
expires:202605051515;;040437

lake st clair forecast
national weather service detroit/pontiac mi
304 am edt tue may 5 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...north flow turns lighter and more variable this
afternoon in the wake of a cold front. another low pressure
system organizes well south of the area through wednesday,
favoring the gradual development of northeast winds. as this low
moves over the northeast mid to late week, northeast winds will
back from the northeast to northerly, and eventually take on a
more westerly component by thursday.


lcz460-051515-
lake st clair-
304 am edt tue may 5 2026

.today...west winds 10 to 15 knots. mostly cloudy with a chance of
light showers. waves 2 feet or less.
.tonight...southwest winds 5 to 10 knots this evening becoming light
and variable...then becoming northwest 5 to 10 knots early in the
morning. mostly cloudy with a chance of light showers. waves 2 feet
or less.
.wednesday...north winds 5 to 10 knots backing to the west early in
the afternoon. partly sunny. a chance of light showers early in the
morning. waves 2 feet or less.
.wednesday night...northwest winds 5 to 10 knots. mostly cloudy
early in the evening becoming partly cloudy. waves 2 feet or less.
.thursday...west winds 5 to 10 knots increasing to 10 to 15 knots in
the evening. partly cloudy. waves 2 feet or less.
.friday...southwest winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.saturday...southwest winds 10 to 15 knots. partly cloudy. a chance
of showers. waves 2 feet or less.

$$

fzus63 kdtx 050704
glflh 
expires:202605051515;;040433

open lake forecast for lake huron
national weather service detroit/pontiac mi
304 am edt tue may 5 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...north flow turns lighter and more variable this
afternoon in the wake of a cold front. another low pressure
system organizes well south of the area through wednesday,
favoring the gradual development of northeast winds. as this low
moves over the northeast mid to late week, northeast winds will
back from the northeast to northerly, and eventually take on a
more westerly component by thursday.


lhz361-051515-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
304 am edt tue may 5 2026

.today...west winds 10 to 15 knots. waves 2 to 4 feet. 
.tonight...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 in the late evening and overnight. 
.wednesday...west winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and afternoon. waves 2 feet or less.
.wednesday night...west winds 10 to 15 knots becoming northwest
5 to 10 knots in the late evening and overnight. waves 1 to
3 feet. 
.thursday...west winds 5 to 10 knots. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the east early
in the evening...then veering to the south by midnight. waves
2 feet or less. 
.saturday...west winds 5 to 10 knots becoming southwest 10 to
15 knots early in the evening...then decreasing to 5 to 10 knots
by midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 050704
glflh 
expires:202605051515;;040434

open lake forecast for lake huron
national weather service detroit/pontiac mi
304 am edt tue may 5 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...north flow turns lighter and more variable this
afternoon in the wake of a cold front. another low pressure
system organizes well south of the area through wednesday,
favoring the gradual development of northeast winds. as this low
moves over the northeast mid to late week, northeast winds will
back from the northeast to northerly, and eventually take on a
more westerly component by thursday.


lhz362-363-051515-
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-
304 am edt tue may 5 2026

.today...west winds 5 to 10 knots backing to the southwest early
in the afternoon...then backing to the northeast late in the
afternoon. waves 2 to 4 feet. 
.tonight...north winds 5 to 10 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet after midnight. 
.wednesday...north winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...north winds 5 to 10 knots backing to the
northwest after midnight. waves 1 to 3 feet. 
.thursday...west winds 5 to 10 knots backing to the southwest
late in the morning...then backing to the southeast late in the
afternoon veering to the southwest late in the evening. waves
2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the southeast
early in the evening...then veering to the south by midnight.
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots. waves 1 to 3 feet. 


$$

fzus63 kdtx 050704
glflh 
expires:202605051515;;040435

open lake forecast for lake huron
national weather service detroit/pontiac mi
304 am edt tue may 5 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...north flow turns lighter and more variable this
afternoon in the wake of a cold front. another low pressure
system organizes well south of the area through wednesday,
favoring the gradual development of northeast winds. as this low
moves over the northeast mid to late week, northeast winds will
back from the northeast to northerly, and eventually take on a
more westerly component by thursday.


lhz462>464-051515-
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-
304 am edt tue may 5 2026

.today...west winds 5 to 10 knots backing to the southeast late
in the afternoon. a chance of showers. waves 1 to 3 feet. 
.tonight...southeast winds 5 to 10 knots backing to the north
after midnight. waves 2 feet or less. 
.wednesday...north winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...northeast winds 5 to 10 knots early in the
evening becoming light and variable. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots backing to the east late in
the afternoon...then veering to the southwest late in the
evening. waves 2 feet or less. 
.friday...west winds 5 to 10 knots backing to the south. a chance
of showers by midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots backing to the south by
midnight. a chance of showers. waves 2 feet or less. 


$$

fzus63 kmkx 050728
glflm 
expires:202605051515;;041246

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
228 am cdt tue may 5 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...

the cold front in association with low pressure around 29.0 inches  
moving east across james bay through today has largely pushed out
shifting winds to the northwest across the lake. these winds have
been weaker as well.

west to northwest winds then persist through the first half of 
today. winds will become light and variable by this afternoon and
through tonight, as a weak surface ridge passes over the lake. 
mainly light to modest winds are expected wednesday afternoon and 
night, before south to southwest winds return thursday into 
friday. gales are not currently forecast at this time.


lmz080-669-671-673-675-777-779-870-872-874-876-878-051515-
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-
228 am cdt tue may 5 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 10 to 15 kt backing to south. isolated
rain showers this morning. waves 2 to 4 ft subsiding to 1 to
2 ft. 
.tonight...south winds 5 to 10 kt veering to north. waves 1 to
2 ft. 
.wednesday...north winds 5 to 10 kt becoming northeast 10 to
15 kt. waves 1 to 2 ft. 
.wednesday night...southwest winds 5 to 10 kt becoming west.
waves 1 to 2 ft. 
.thursday...west winds 10 to 15 kt becoming southwest. waves 1 to
2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming south. waves 1 to
3 ft. 
.saturday...west winds 10 to 15 kt becoming south. waves 2 to
4 ft.  

$$

fzus63 kmkx 050728
glflm 
expires:202605051515;;041245

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
228 am cdt tue may 5 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...

the cold front in association with low pressure around 29.0 inches  
moving east across james bay through today has largely pushed out
shifting winds to the northwest across the lake. these winds have
been weaker as well.

west to northwest winds then persist through the first half of 
today. winds will become light and variable by this afternoon and
through tonight, as a weak surface ridge passes over the lake. 
mainly light to modest winds are expected wednesday afternoon and 
night, before south to southwest winds return thursday into 
friday. gales are not currently forecast at this time.


lmz261-362-364-366-563-565-567-868-051515-
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-
228 am cdt tue may 5 2026

sheboygan wi to pentwater mi north...

.today...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft. 
.tonight...west winds 10 to 15 kt becoming northwest 5 to 10 kt.
waves 1 to 2 ft. 
.wednesday...northwest winds 5 to 10 kt increasing to 10 to 15 kt
late in the morning, then becoming west 10 to 20 kt early in the
afternoon becoming southwest late. waves 1 to 2 ft. 
.wednesday night...west winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south. waves 1 to
3 ft. 
.saturday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042393

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue may 5 2026 /301 am cdt tue may 5 2026/

.early this morning...northwest winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.today...west winds 15 to 25 knots. a slight chance of rain and
snow showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots veering northwest after
midnight. a slight chance of rain and snow showers through
midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots late. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots veering northwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 
.saturday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042394

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz263-052000-
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 am edt tue may 5 2026

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

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042395

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz264-052000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt tue may 5 2026

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

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042396

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz265-052000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt tue may 5 2026

.early this morning...west winds 20 to 30 knots. waves 1 to
3 feet. 
.today...west winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. waves building to 2 to 4 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots veering south. waves calm to
2 feet. 
.saturday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042397

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz266-052000-
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 am edt tue may 5 2026

.early this morning...west winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...west winds 20 to 30 knots. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots. waves subsiding to 2 to
4 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042398

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz267-052000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt tue may 5 2026

.early this morning...west winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...west winds 20 to 30 knots. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots veering northwest late.
waves subsiding to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 

$$