fzus61 kbuf 051402
glflo 
expires:202605052100;;055573

open lake forecast for lake ontario
national weather service buffalo ny
1002 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. a 
29.6 inch low will track across the lake early saturday, followed by 
a 29.7 inch low that will track near or just south of the lake for 
later sunday.


loz063>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt tue may 5 2026

.rest of today...southwest winds 15 to 20 knots becoming west. a
chance of showers late 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 051402
glflo 
expires:202605052100;;055572

open lake forecast for lake ontario
national weather service buffalo ny
1002 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. a 
29.6 inch low will track across the lake early saturday, followed by 
a 29.7 inch low that will track near or just south of the lake for 
later sunday.


loz062-052100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt tue may 5 2026

.rest of today...southwest winds 15 to 20 knots becoming west. a
chance of showers early this afternoon. 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 051325
glfle 
expires:202605052015;;054409

open lake forecast for lake erie
national weather service cleveland oh
925 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...
a cold front will move east across the region 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>166-052015-
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-
925 am edt tue may 5 2026

.rest of today...southwest winds 10 to 15 knots becoming
northwest. a chance of rain late this morning, then a chance of
rain with a slight chance of thunderstorms early this afternoon.
rain with a slight chance of thunderstorms late. 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 051325
glfle 
expires:202605052015;;054410

open lake forecast for lake erie
national weather service cleveland oh
925 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...
a cold front will move east across the region 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>169-052015-
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-
925 am edt tue may 5 2026

.rest of today...southwest winds 5 to 15 knots becoming west. a
slight chance of rain late this morning, then a chance of rain
and thunderstorms early this afternoon. rain with a chance of
thunderstorms late. 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 051345
glfsc 
expires:202605052200;;054892

lake st clair forecast
national weather service detroit/pontiac mi
945 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...a cold front will ease across western lake erie into
the lower great lakes this evening. low pressure will develop
along this front over the ohio valley, causing wind over the
central great lakes to organize out of the northeast on
wednesday. broad high pressure then builds into the ohio valley
and southern great lakes thursday into friday.


lcz460-052200-
lake st clair-
945 am edt tue may 5 2026

.rest of today...northwest winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. 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 051343
glflh 
expires:202605052200;;054844

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 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...a cold front will ease across western lake erie into
the lower great lakes this evening. low pressure will develop
along this front over the ohio valley, causing wind over the
central great lakes to organize out of the northeast on
wednesday. broad high pressure then builds into the ohio valley
and southern great lakes thursday into friday.


lhz362-363-052200-
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-
943 am edt tue may 5 2026

.rest of today...southwest winds 5 to 10 knots. waves 2 to
4 feet. 
.tonight...north winds 5 to 10 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet in the late evening and overnight. 
.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 051343
glflh 
expires:202605052200;;054843

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 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...a cold front will ease across western lake erie into
the lower great lakes this evening. low pressure will develop
along this front over the ohio valley, causing wind over the
central great lakes to organize out of the northeast on
wednesday. broad high pressure then builds into the ohio valley
and southern great lakes thursday into friday.


lhz361-052200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
943 am edt tue may 5 2026

.rest of 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 1 to 3 feet. 
.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 2 feet or less. 


$$

fzus63 kdtx 051343
glflh 
expires:202605052200;;054845

open lake forecast for lake huron
national weather service detroit/pontiac mi
943 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...a cold front will ease across western lake erie into
the lower great lakes this evening. low pressure will develop
along this front over the ohio valley, causing wind over the
central great lakes to organize out of the northeast on
wednesday. broad high pressure then builds into the ohio valley
and southern great lakes thursday into friday.


lhz462>464-052200-
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-
943 am edt tue may 5 2026

.rest of today...north winds 5 to 10 knots veering to the
southeast late in the afternoon. a chance of showers. waves
2 feet or less. 
.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 051349
glflm 
expires:202605052130;;055094

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 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...

west to northwest winds expected through this morning, becoming 
light and variable by this afternoon and through tonight as a 
weak surface high around 29.9 inches passes over the lake. mainly
light to modest winds are expected wednesday afternoon and night,
before south to southwest winds return thursday into friday. winds
become westerly for a brief period into saturday behind a cold
front before becoming southwesterly once again. gales are not 
forecast at this time.


lmz261-362-364-366-563-565-567-868-052130-
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-
849 am cdt tue may 5 2026

sheboygan wi to pentwater mi north...

.rest of today...west winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.tonight...west winds 10 to 15 kt becoming northwest. waves 1 to
2 ft. 
.wednesday...northwest winds 5 to 10 kt backing to south 10 to
15 kt. 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 2 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 1 to 2 ft.  

$$

fzus63 kmkx 051349
glflm 
expires:202605052130;;055095

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 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...

west to northwest winds expected through this morning, becoming 
light and variable by this afternoon and through tonight as a 
weak surface high around 29.9 inches passes over the lake. mainly
light to modest winds are expected wednesday afternoon and night,
before south to southwest winds return thursday into friday. winds
become westerly for a brief period into saturday behind a cold
front before becoming southwesterly once again. gales are not 
forecast at this time.


lmz080-669-671-673-675-777-779-870-872-874-876-878-052130-
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-
849 am cdt tue may 5 2026

sheboygan wi to pentwater mi south...

.rest of today...northwest winds 10 to 15 kt backing to south.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.tonight...south winds 10 to 15 kt veering to north. waves 1 to
2 ft. 
.wednesday...north winds 5 to 10 kt becoming northeast. 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 1 to
3 ft.  

$$

fzus63 kmqt 051401
glfls 
expires:202605052000;;055490

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



lsz267-052000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt tue may 5 2026

.rest of today...west winds 20 to 30 knots. waves 4 to 7 feet
occasionally to 9 feet 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. 

$$

fzus63 kmqt 051401
glfls 
expires:202605052000;;055485

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue may 5 2026 /901 am cdt tue may 5 2026/

.rest of today...west winds 15 to 25 knots. waves 3 to 5 feet
occasionally to 7 feet 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 051401
glfls 
expires:202605052000;;055486

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



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-
1001 am edt tue may 5 2026

.rest of today...west winds 15 to 25 knots. waves 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 051401
glfls 
expires:202605052000;;055487

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



lsz264-052000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt tue may 5 2026

.rest of today...west winds 15 to 25 knots. waves 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 051401
glfls 
expires:202605052000;;055488

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



lsz265-052000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt tue may 5 2026

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 1 to 3 feet 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 051401
glfls 
expires:202605052000;;055489

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
lifts into northern quebec this evening and tonight as 30.2 inch 
ridging builds east of the canadian rockies. wednesday, the 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. 
high pressure toi 30.1 inches builds back over the plains by sunday.



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-
1001 am edt tue may 5 2026

.rest of today...west winds 20 to 30 knots. waves 4 to 7 feet
occasionally to 9 feet 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. 

$$