fzus61 kbuf 151402
glflo 
expires:202605152100;;601449

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri may 15 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 30.1 inch high will slide southeast from the ohio 
valley to the carolinas today, then off the carolina coast tonight. 
a 29.1 inch low well to the north over hudson bay will swing a warm 
front into the lower great lakes on saturday, with an attendant cold 
front approaching then stalling just north of the lake saturday 
night. a 29.4 inch low over the central plains on sunday will weaken 
to 29.7 inches as it moves northeast into the upper great lakes 
sunday night while swinging an attendant warm front across the lake. 
another area of low pressure will develop over the central plains 
monday. the low will weaken from 29.4 inches to 29.6 inches as it 
tracks northeast to the upper great lakes monday night into tuesday 
morning, then to near the southern tip of james bay on tuesday.


loz063>065-152100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt fri may 15 2026

.this afternoon...northwest winds 5 to 10 knots becoming west.
waves 2 feet or less. 
.tonight...southwest winds 5 to 15 knots becoming south. waves
1 to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers in the afternoon. waves 1 to 2 feet. 
.saturday night...southwest winds 5 to 15 knots becoming west. a
chance of showers. waves 1 to 3 feet. 
.sunday...west winds 10 knots or less becoming southeast. waves
2 feet or less. 
.monday...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.tuesday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely with a chance of thunderstorms tuesday night.
waves 1 to 3 feet building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 151402
glflo 
expires:202605152100;;601448

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri may 15 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 30.1 inch high will slide southeast from the ohio 
valley to the carolinas today, then off the carolina coast tonight. 
a 29.1 inch low well to the north over hudson bay will swing a warm 
front into the lower great lakes on saturday, with an attendant cold 
front approaching then stalling just north of the lake saturday 
night. a 29.4 inch low over the central plains on sunday will weaken 
to 29.7 inches as it moves northeast into the upper great lakes 
sunday night while swinging an attendant warm front across the lake. 
another area of low pressure will develop over the central plains 
monday. the low will weaken from 29.4 inches to 29.6 inches as it 
tracks northeast to the upper great lakes monday night into tuesday 
morning, then to near the southern tip of james bay on tuesday.


loz062-152100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt fri may 15 2026

.this afternoon...west winds 5 to 15 knots becoming southwest.
waves 1 foot or less. 
.tonight...southwest winds 10 to 15 knots. waves 1 to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers in the afternoon. waves 1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots becoming west. a
chance of showers in the evening. waves 1 to 3 feet. 
.sunday...west winds 10 knots or less becoming east. waves 1 foot
or less. 
.monday...southeast winds 5 to 15 knots becoming southwest. a
chance of showers monday night. waves 1 foot or less building to
1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots. a chance of showers
during the day, then showers likely tuesday night. waves 1 to
3 feet building to 3 to 5 feet. 

$$

fzus61 kcle 151405
glfle 
expires:202605152015;;601567

open lake forecast for lake erie
national weather service cleveland oh
1005 am edt fri may 15 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 of 30.10 inches overhead will build east tonight. 
a warm front will lift north across the lake friday night into 
saturday. a nearly stationary boundary of 30.00 inches will 
settle near lake erie on sunday before lifting north as a warm 
front sunday night. a surface ridge averaging 30.10 inches will 
persist over the eastern great lakes on monday followed by low 
pressure of 29.60 inches tracking east through the upper great 
lakes into quebec on tuesday.


lez061-165>169-152015-
ripley to buffalo ny extending from 5nm 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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
1005 am edt fri may 15 2026

.this afternoon...west winds 10 knots or less becoming south.
waves 1 foot or less. 
.tonight...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...south winds 15 to 20 knots becoming southwest. a
chance of showers. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers. waves 1 to 3 feet. 
.sunday...south winds 5 to 15 knots. waves 2 feet or less. 
.monday...south winds 10 to 15 knots. a chance of showers monday
night. waves 1 to 3 feet. 
.tuesday...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms during the day, then showers likely with a
chance of thunderstorms tuesday night. waves 1 to 3 feet building
to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151405
glfle 
expires:202605152015;;601566

open lake forecast for lake erie
national weather service cleveland oh
1005 am edt fri may 15 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 of 30.10 inches overhead will build east tonight. 
a warm front will lift north across the lake friday night into 
saturday. a nearly stationary boundary of 30.00 inches will 
settle near lake erie on sunday before lifting north as a warm 
front sunday night. a surface ridge averaging 30.10 inches will 
persist over the eastern great lakes on monday followed by low 
pressure of 29.60 inches tracking east through the upper great 
lakes into quebec on tuesday.


lez162>164-152015-
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-
1005 am edt fri may 15 2026

.this afternoon...southwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.tonight...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest.
showers likely with a chance of thunderstorms in the morning,
then a chance of showers and thunderstorms in the afternoon.
waves 1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers. waves 2 feet or less. 
.sunday...south winds 5 to 15 knots. waves 2 feet or less. 
.monday...south winds 10 to 15 knots. a chance of showers and
thunderstorms monday night. waves 1 to 2 feet. 
.tuesday...southwest winds 15 to 20 knots. showers likely with a
chance of thunderstorms. waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 151322
glfsc 
expires:202605152130;;600630

lake st clair forecast
national weather service detroit/pontiac mi
922 am edt fri may 15 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, 30.00 inches, exits the ohio valley
this morning resulting in light southwest flow that ramps up
through the afternoon. breezy winds develop by this evening ahead
of surface troughing that generates periods of showers and
thunderstorms this weekend into early next week.


lcz460-152130-
lake st clair-
922 am edt fri may 15 2026

.rest of today...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the afternoon. partly sunny. waves 2 feet or less.
.tonight...south winds 10 to 15 knots. mostly clear. waves 2 feet or
less.
.saturday...southwest winds 10 to 15 knots. mostly cloudy. light
showers likely until late afternoon...then a chance of light showers
early in the afternoon. waves 2 feet or less.
.saturday night...southwest winds 10 to 15 knots diminishing to 5 to
10 knots by midnight...then veering to the northwest after midnight.
partly cloudy. a chance of light showers early in the evening. a
chance of light showers after midnight. waves 2 feet or less.
.sunday...northeast winds 5 to 10 knots veering to the southeast in
the afternoon...then increasing to 10 to 15 knots in the evening.
mostly cloudy in the morning becoming partly cloudy. waves 2 feet or
less.
.monday...southwest winds 15 to 20 knots. mostly clear. waves 1 to 3
feet.
.tuesday...southwest winds 20 to 25 knots with gusts to 30 knots.
partly cloudy. showers likely and a chance of thunderstorms. waves 2
to 4 feet. a small craft advisory may be needed.

$$

fzus63 kdtx 151321
glflh 
expires:202605152130;;600599

open lake forecast for lake huron
national weather service detroit/pontiac mi
921 am edt fri may 15 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, 30.00 inches, exits the ohio valley
this morning resulting in light southwest flow that ramps up
through the afternoon. breezy winds develop by this evening ahead
of surface troughing that generates periods of showers and
thunderstorms this weekend into early next week.


lhz363-462>464-152130-
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-
921 am edt fri may 15 2026

.rest of today...south winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. waves 1 to 3 feet building to 2 to
4 feet late in the afternoon. 
.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots after midnight...then decreasing to 10 to 15 knots early
in the morning. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots. a chance of showers in
the morning. waves 3 to 5 feet. 
.saturday night...north winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.sunday...north winds 5 to 10 knots veering to the east late in
the morning...then increasing to 10 to 15 knots late in the
afternoon becoming southeast 15 to 20 knots late in the evening.
a chance of showers late in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet late in the evening. 
.monday...south winds 15 to 20 knots. a chance of showers. a
chance of thunderstorms. rain showers likely by midnight. waves
3 to 5 feet. 
.tuesday...south winds 15 to 20 knots. showers likely early in
the morning. a chance of showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kdtx 151321
glflh 
expires:202605152130;;600598

open lake forecast for lake huron
national weather service detroit/pontiac mi
921 am edt fri may 15 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, 30.00 inches, exits the ohio valley
this morning resulting in light southwest flow that ramps up
through the afternoon. breezy winds develop by this evening ahead
of surface troughing that generates periods of showers and
thunderstorms this weekend into early next week.


lhz361-362-152130-
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-
921 am edt fri may 15 2026

.rest of today...south winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon. waves 1 to 3 feet building to
3 to 5 feet in the afternoon. 
.tonight...south winds 15 to 20 knots. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.saturday...south winds 10 to 15 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.saturday night...west winds 10 to 15 knots becoming northwest
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight. 
.sunday...north winds 5 to 10 knots veering to the east late in
the morning...then increasing to 10 to 15 knots late in the
afternoon increasing to 15 to 20 knots late in the evening. a
chance of showers late in the afternoon. waves 1 to 3 feet
building to 4 to 6 feet. waves occasionally around 8 feet. 
.monday...southeast winds 15 to 20 knots becoming south 10 to
15 knots by midnight. a chance of showers early in the morning. a
chance of thunderstorms. rain showers likely . waves 5 to 7 feet.
waves occasionally around 10 feet. 
.tuesday...south winds 15 to 20 knots. showers likely early in
the morning. a chance of showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kmkx 151349
glflm 
expires:202605152115;;601091

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 am cdt fri may 15 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...

southerly winds will increase through the rest of this morning
behind departing high pressure around 30.0 inches and low 
pressure around 29.0 inches moving from central manitoba into 
ontario. winds will peak this afternoon into tonight, leading to a
period of southerly gales. a gale warning has been issued for the
northern third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday, but more likely for tuesday. multiple 
rounds of showers and storms will be possible this weekend into 
early next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-152115-
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 fri may 15 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 15 to 25 kt increasing to 30 kt.
waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft. 
.tonight...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers and thunderstorms overnight. waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.saturday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
chance of showers in the morning. waves 3 to 5 ft subsiding to
2 to 4 ft. 
.saturday night...south winds 5 to 10 kt becoming southeast 10 to
15 kt. chance of showers overnight. waves 1 to 2 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers in the morning. waves 2 to 4 ft building to
4 to 6 ft occasionally to 8 ft. 
.sunday night...south winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 151349
glflm 
expires:202605152115;;601090

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 am cdt fri may 15 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...

southerly winds will increase through the rest of this morning
behind departing high pressure around 30.0 inches and low 
pressure around 29.0 inches moving from central manitoba into 
ontario. winds will peak this afternoon into tonight, leading to a
period of southerly gales. a gale warning has been issued for the
northern third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday, but more likely for tuesday. multiple 
rounds of showers and storms will be possible this weekend into 
early next week.


lmz366-565-567-868-152115-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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 fri may 15 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

.rest of today...south winds 15 to 25 kt increasing to 30 kt.
waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft. 
.tonight...south winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers and slight chance of thunderstorms
overnight. waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 7 ft occasionally to 9 ft. 
.saturday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt backing to east. waves
1 to 3 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.sunday night...southeast winds 15 to 25 kt becoming south.
chance of showers. waves 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 151349
glflm 
expires:202605152115;;601089

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 am cdt fri may 15 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...

southerly winds will increase through the rest of this morning
behind departing high pressure around 30.0 inches and low 
pressure around 29.0 inches moving from central manitoba into 
ontario. winds will peak this afternoon into tonight, leading to a
period of southerly gales. a gale warning has been issued for the
northern third of the open waters.

southerly winds will persist on saturday, while becoming lighter
saturday morning into saturday afternoon as the low over canada 
pulls away to the northeast. southerly winds will then pick back 
up sunday afternoon into monday ahead of approaching low pressure.
gales are possible monday, but more likely for tuesday. multiple 
rounds of showers and storms will be possible this weekend into 
early next week.


lmz261-362-364-563-152115-
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 rock island passage to sturgeon bay wi-
849 am cdt fri may 15 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect from 1 pm cdt this afternoon through
late tonight...

.rest of today...south winds to 30 kt increasing to gales to
35 kt. chance of sprinkles through mid morning. waves 3 to 5 ft
building to 6 to 9 ft occasionally to 12 ft. 
.tonight...south gales to 35 kt becoming southwest to 30 kt.
chance of rain showers and slight chance of thunderstorms
overnight. waves 7 to 10 ft occasionally to 13 ft subsiding to
6 to 9 ft occasionally to 12 ft. 
.saturday...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.saturday night...northeast winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...east winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers in the afternoon. waves 1 to 3 ft building
to 3 to 5 ft. 
.sunday night...east winds to 30 kt becoming southeast. chance of
showers. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...south gales to 40 kt becoming southwest gales to
35 kt. chance of showers. waves 8 to 11 ft occasionally to 14 ft.
 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601444

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz266-152000-
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 fri may 15 2026

.rest of today...south winds 20 to 30 knots. a slight chance of
showers by late morning. waves 4 to 8 feet occasionally to
10 feet. 
.tonight...south winds 20 to 30 knots becoming southwest to
30 knots with a few gale force gusts to 35 knots possible after
midnight, then diminishing to 15 to 25 knots late. a slight
chance of showers and thunderstorms through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots veering northwest late.
waves subsiding to 1 to 3 feet. 
.saturday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...east gales to 35 knots veering southeast after
midnight. rain showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday...south winds 15 to 25 knots becoming east gales to
35 knots. rain showers likely. waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 5 to 8 feet occasionally
to 10 feet. 
.tuesday...south gales to 35 knots veering west. rain showers
likely. waves building to 7 to 11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601445

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt fri may 15 2026

.rest of today...south winds 15 to 25 knots increasing to
30 knots with a few gale force gusts to 35 knots possible. a
chance of showers by late morning. waves 3 to 6 feet occasionally
to 8 feet building to 4 to 7 feet occasionally to 9 feet. 
.tonight...south winds 20 to 30 knots becoming southwest 15 to
25 knots late. a slight chance of thunderstorms through midnight.
a slight chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots veering northwest
late. waves subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots becoming
northeast 5 to 15 knots after midnight. waves subsiding to calm
to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. a slight chance of rain showers by mid
afternoon. waves building to 2 to 4 feet. 
.sunday night...east winds 20 to 30 knots becoming southeast
gales to 35 knots after midnight. rain showers. waves building to
4 to 8 feet occasionally to 10 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots. rain showers likely. waves subsiding to 1 to 3 feet,
then building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south winds 20 to 30 knots veering west. rain showers
likely. a chance of rain showers. waves building to 8 to 11 feet
occasionally to 14 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601440

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt fri may 15 2026 /901 am cdt fri may 15 2026/

.rest of today...southwest winds 10 to 20 knots increasing to
20 to 30 knots. waves 3 to 5 feet occasionally to 7 feet building
to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to calm to 2 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.sunday night...northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
10 to 14 feet occasionally to 18 feet. 
.tuesday...northeast gales to 40 knots becoming west 20 to
30 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601441

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz263-152000-
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 fri may 15 2026

.rest of today...southwest winds 15 to 25 knots increasing to
20 to 30 knots late. waves 3 to 6 feet occasionally to 8 feet
building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.saturday night...east winds 5 to 15 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.sunday...east winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. a slight chance of rain showers
through early afternoon, then rain showers likely and a slight
chance of thunderstorms by mid afternoon. waves building to 6 to
9 feet occasionally to 11 feet. 
.sunday night...east gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
10 to 14 feet occasionally to 18 feet. 
.tuesday...north gales to 40 knots becoming northwest gales to
35 knots. rain showers likely. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601442

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt fri may 15 2026

.rest of today...south winds 15 to 25 knots veering southwest
late. waves 3 to 6 feet occasionally to 8 feet building to 4 to
7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...east winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
35 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
8 to 11 feet occasionally to 14 feet. 
.tuesday...north gales to 40 knots becoming northwest 20 to
30 knots. rain showers likely. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601443

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt fri may 15 2026

.rest of today...south winds 15 to 25 knots. waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...southwest winds 15 to 25 knots. waves subsiding to
1 to 3 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then becoming northwest 15 to 25 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.saturday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday night...east winds 20 to 30 knots veering southeast after
midnight. showers and a chance of thunderstorms. waves building
to 4 to 8 feet occasionally to 10 feet. 
.monday...north winds 15 to 25 knots veering northeast. rain
showers. waves subsiding to 2 to 4 feet, then building to 5 to
8 feet occasionally to 10 feet. 
.tuesday...west gales to 35 knots. rain showers likely. waves
building to 5 to 9 feet occasionally to 11 feet. 

$$