fzus61 kbuf 152002
glflo 
expires:202605160300;;615650

open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 off the carolina coast 
tonight. a 29.1 inch low well to the north over hudson bay will 
swing a warm front across the lower great lakes tomorrow, with an 
attendant cold front approaching and stalling near 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. a 
cold front from this low will cross the lake wednesday.


loz063>065-160300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri may 15 2026

.tonight...southwest winds 5 to 10 knots becoming south. waves
1 to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers early in the afternoon. showers likely with a
chance of thunderstorms late. waves 2 feet or less. 
.saturday night...southwest winds 5 to 15 knots becoming west. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 2 to 4 feet subsiding to 1 to 3 feet.
.sunday...west winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...south winds 10 knots or less becoming east. waves
1 foot or less. 
.monday...southeast winds 10 to 15 knots becoming south. waves
2 feet or less. 
.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. 
.wednesday...southwest winds 10 to 15 knots becoming west.
showers likely during the day. waves 2 to 4 feet building to 3 to
5 feet, then subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 152002
glflo 
expires:202605160300;;615649

open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 off the carolina coast 
tonight. a 29.1 inch low well to the north over hudson bay will 
swing a warm front across the lower great lakes tomorrow, with an 
attendant cold front approaching and stalling near 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. a 
cold front from this low will cross the lake wednesday.


loz062-160300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt fri may 15 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151953
glfle 
expires:202605160215;;615273

open lake forecast for lake erie
national weather service cleveland oh
353 pm 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 30.10 inches shifts east of lake erie tonight. a
warm front lifts northward, then will become stationary over the
lake through the weekend, then riding averaging 30.00 inches
through early next week.



lez162>165-160215-
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-
353 pm edt fri may 15 2026

.tonight...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest.
showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. waves 1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms in the evening, then a chance of
showers overnight. waves 1 to 3 feet. 
.sunday...southwest winds 10 knots or less becoming east. a
chance of showers. waves 1 foot or less. 
.sunday night...east winds 5 to 15 knots becoming south. a chance
of showers and thunderstorms in the evening. 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. 
.wednesday...west winds 10 to 15 knots becoming north. a chance
of showers during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151953
glfle 
expires:202605160215;;615274

open lake forecast for lake erie
national weather service cleveland oh
353 pm 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 30.10 inches shifts east of lake erie tonight. a
warm front lifts northward, then will become stationary over the
lake through the weekend, then riding averaging 30.00 inches
through early next week.



lez061-166>169-160215-
ripley to buffalo ny extending from 5nm 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-
353 pm edt fri may 15 2026

.tonight...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. a
chance of showers with a slight chance of thunderstorms late in
the morning. 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 and thunderstorms in the evening. waves 1 to 3 feet. 
.sunday...southwest winds 10 knots or less becoming northeast. a
chance of showers. waves 2 feet or less. 
.sunday night...east winds 5 to 15 knots becoming south. 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. showers with a chance
of thunderstorms. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...west winds 10 to 15 knots becoming north. a chance
of showers during the day. waves 2 to 4 feet subsiding to 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 151945
glfsc 
expires:202605160345;;615126

lake st clair forecast
national weather service detroit/pontiac mi
345 pm 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...low pressure trough, averaging 29.80 inches, tracks
through the great lakes saturday morning leading to showers and
thunderstorms. southwest winds become variable with localized
gusty winds over 30 knots possible in any thunderstorm activity.
a shallow cold front stalls south of lake huron saturday night
before high pressure arrives sunday.


lcz460-160345-
lake st clair-
345 pm edt fri may 15 2026

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

$$

fzus63 kdtx 151944
glflh 
expires:202605160345;;615123

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm 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...low pressure trough, averaging 29.80 inches, tracks
through the great lakes saturday morning leading to showers and
thunderstorms. southwest winds become variable with localized
gusty winds over 30 knots possible in any thunderstorm activity.
a shallow cold front stalls south of lake huron saturday night
before high pressure arrives sunday.


lhz361-362-160345-
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-
344 pm edt fri may 15 2026

.tonight...south winds 15 to 20 knots. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots late in the morning...then becoming southwest 10 to
15 knots in the afternoon. a chance of showers in the morning.
waves 4 to 6 feet. waves occasionally around 8 feet. 
.saturday night...northwest winds 10 to 15 knots becoming west
5 to 10 knots after midnight. waves 2 to 4 feet. 
.sunday...northwest winds 5 to 10 knots veering to the east early
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet early
in the afternoon. 
.sunday night...east winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. a chance of showers.
waves 4 to 6 feet. 
.monday...southeast winds 15 to 20 knots veering to the south
late in the morning...then decreasing to 10 to 15 knots late in
the evening. showers likely and a chance of thunderstorms. waves
5 to 7 feet. waves occasionally around 10 feet. 
.tuesday...south winds 15 to 20 knots veering to the southwest by
midnight. a chance of thunderstorms early in the morning. rain
showers likely early in the morning. a chance of showers . waves
5 to 7 feet. waves occasionally around 10 feet. 
.wednesday...west winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots until early evening...then
becoming northwest 15 to 20 knots by midnight. waves 6 to 9 feet.
waves occasionally around 12 feet. 


$$

fzus63 kdtx 151944
glflh 
expires:202605160345;;615124

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm 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...low pressure trough, averaging 29.80 inches, tracks
through the great lakes saturday morning leading to showers and
thunderstorms. southwest winds become variable with localized
gusty winds over 30 knots possible in any thunderstorm activity.
a shallow cold front stalls south of lake huron saturday night
before high pressure arrives sunday.


lhz363-462>464-160345-
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-
344 pm edt fri may 15 2026

.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 increasing to 15 to
20 knots late in the morning...then becoming southwest 10 to
15 knots in the afternoon. 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 northeast
early in the afternoon. waves 1 to 3 feet. 
.sunday night...east winds 10 to 15 knots becoming southeast
15 to 20 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet in the late evening and overnight. 
.monday...south winds 15 to 20 knots. a chance of showers late in
the afternoon. rain showers likely late in the evening. waves
4 to 6 feet. waves occasionally around 8 feet. 
.tuesday...south winds 15 to 20 knots. a chance of showers early
in the morning...then a chance of showers and thunderstorms .
waves 4 to 6 feet. 
.wednesday...west winds 10 to 15 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 


$$

fzus63 kmkx 151943
glflm 
expires:202605160315;;615120

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

low pressure around 29.1 inches tracking across ontario is 
bringing increasing southerly winds across lake michigan this 
afternoon into the evening. still looking at a few gale force 
gusts to occur over the northern third of lake michigan into this 
evening and the gale warning remains in effect. then a line of 
showers and thunderstorms will push across the region overnight 
into early saturday morning along the low pressure's cold front. 
looking at the the front to bring more southwesterly winds into 
saturday as the front stalls south of lake michigan. then another 
low pressure around 29.2 inches is progged to develop over the 
plains sunday and lift into the upper midwest into the start of 
next week. this will bring increasing southerly winds and 
additional shower and thunderstorm potential through monday 
night/tuesday. then high pressure looks to build in for midweek 
behind the early week low pressure system.


lmz080-669-671-673-675-777-779-870-872-874-876-878-160315-
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-
243 pm cdt fri may 15 2026

sheboygan wi to pentwater mi south...

.tonight...south winds to 30 kt diminishing to 15 to 25 kt. rain
showers likely with a chance of thunderstorms overnight. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.saturday...southwest winds 10 to 20 kt becoming south 10 to
15 kt. slight chance of showers and thunderstorms in the morning.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt becoming southeast.
chance of rain showers overnight. waves 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers. waves 2 to 4 ft building to 3 to 5 ft. 
.sunday night...south winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds to 30 kt. showers likely with a
chance of thunderstorms. 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. 
.wednesday...northwest winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 151943
glflm 
expires:202605160315;;615119

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

low pressure around 29.1 inches tracking across ontario is 
bringing increasing southerly winds across lake michigan this 
afternoon into the evening. still looking at a few gale force 
gusts to occur over the northern third of lake michigan into this 
evening and the gale warning remains in effect. then a line of 
showers and thunderstorms will push across the region overnight 
into early saturday morning along the low pressure's cold front. 
looking at the the front to bring more southwesterly winds into 
saturday as the front stalls south of lake michigan. then another 
low pressure around 29.2 inches is progged to develop over the 
plains sunday and lift into the upper midwest into the start of 
next week. this will bring increasing southerly winds and 
additional shower and thunderstorm potential through monday 
night/tuesday. then high pressure looks to build in for midweek 
behind the early week low pressure system.


lmz366-565-567-868-160315-
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-
243 pm cdt fri may 15 2026

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

.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. 
.saturday...southwest winds 10 to 20 kt. chance of showers in the
morning. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.saturday night...southwest winds 10 to 15 kt backing to
northeast. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 2 to 4 ft building to 3 to 5 ft. 
.sunday night...southeast winds to 30 kt becoming south. chance
of showers in the evening. waves 5 to 8 ft occasionally to 10 ft.
.monday...south winds to 30 kt. chance of showers in the morning,
then showers likely in the afternoon. waves 6 to 9 ft
occasionally to 12 ft. 
.monday night...south winds to 30 kt. showers likely with a
chance of thunderstorms. 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. 
.wednesday...west winds 10 to 20 kt becoming northwest. waves
3 to 5 ft.  

$$

fzus63 kmkx 151943
glflm 
expires:202605160315;;615118

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

low pressure around 29.1 inches tracking across ontario is 
bringing increasing southerly winds across lake michigan this 
afternoon into the evening. still looking at a few gale force 
gusts to occur over the northern third of lake michigan into this 
evening and the gale warning remains in effect. then a line of 
showers and thunderstorms will push across the region overnight 
into early saturday morning along the low pressure's cold front. 
looking at the the front to bring more southwesterly winds into 
saturday as the front stalls south of lake michigan. then another 
low pressure around 29.2 inches is progged to develop over the 
plains sunday and lift into the upper midwest into the start of 
next week. this will bring increasing southerly winds and 
additional shower and thunderstorm potential through monday 
night/tuesday. then high pressure looks to build in for midweek 
behind the early week low pressure system.


lmz261-362-364-563-160315-
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-
243 pm cdt fri may 15 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect until 1 am cdt saturday...

.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
5 to 8 ft occasionally to 10 ft. 
.saturday...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. slight chance of showers and thunderstorms in the morning.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.saturday night...northwest winds 10 to 15 kt veering to
northeast. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...east winds 10 to 20 kt increasing to 15 to 25 kt. waves
1 to 3 ft building to 2 to 4 ft. 
.sunday night...southeast winds to 30 kt becoming south. 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 becoming southwest. showers likely
in the afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds to 30 kt. showers likely with a
chance of thunderstorms. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...south gales to 35 kt becoming southwest. chance of
showers. waves 8 to 11 ft occasionally to 14 ft. 
.wednesday...west winds to 30 kt becoming northwest. waves 4 to
6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615885

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
405 pm edt fri may 15 2026 /305 pm cdt fri may 15 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...southwest winds 15 to 25 knots becoming west 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then becoming northwest 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.saturday night...north winds 5 to 15 knots becoming east 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.sunday...northeast winds 20 to 30 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 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 3 to 6 feet occasionally to
8 feet. 
.monday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. rain showers likely. waves 3 to 6 feet
occasionally to 8 feet. 
.monday night...northeast gales to 40 knots. rain showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 40 knots diminishing to 15 to 25 knots.
a chance of rain showers. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615886

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz263-160800-
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-
405 pm edt fri may 15 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming west 5 to 15 knots 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...northeast winds 5 to 15 knots veering east
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers and a slight chance of
thunderstorms by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday night...east winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.monday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. rain showers likely and a chance of
thunderstorms. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.monday night...northeast gales to 40 knots. rain showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots.
a chance of rain showers. waves subsiding to 8 to 11 feet
occasionally to 14 feet, then building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday...west winds 20 to 30 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615887

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
405 pm edt fri may 15 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming west 5 to 15 knots late.
waves subsiding to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots veering northwest late.
waves subsiding to 1 to 3 feet, then building to 2 to 4 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 2 to 4 feet. 
.sunday night...east winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet. 
.monday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. rain showers likely. a chance of
thunderstorms by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.monday night...northeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. rain showers and a chance of
thunderstorms. waves building to 8 to 11 feet occasionally to
14 feet. 
.tuesday...west gales to 35 knots. a chance of rain showers.
waves subsiding to 7 to 10 feet occasionally to 13 feet, then
building to 9 to 12 feet occasionally to 15 feet. 
.wednesday...west gales to 35 knots diminishing to 5 to 15 knots.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615888

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
405 pm edt fri may 15 2026

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

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615889

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz266-160800-
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-
405 pm edt fri may 15 2026

.late this afternoon...south winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet. 
.tonight...south winds 20 to 30 knots veering southwest after
midnight, then diminishing to 15 to 25 knots late. a slight
chance of thunderstorms through midnight. a slight chance of
showers. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots veering northwest late.
waves subsiding to 2 to 4 feet. 
.saturday night...north winds 10 to 20 knots becoming northeast
5 to 15 knots late. 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 4 to 8 feet
occasionally to 10 feet. 
.monday...south winds 15 to 25 knots. rain showers likely and a
chance of thunderstorms. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday 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. 
.tuesday...west gales to 35 knots. a chance of rain showers.
waves building to 9 to 12 feet occasionally to 15 feet. 
.wednesday...west gales to 40 knots becoming northwest 15 to
25 knots. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 152005
glfls 
expires:202605160800;;615890

open lake forecast for lake superior
national weather service marquette mi
405 pm 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 29.2 inch low pressure tracking through northern ontario is 
sending 29.5 inch troughing over lake superior late this afternoon. 
this continues to sweep through overnight into early saturday as the 
parent low tracks to near james bay. 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. then, ridging of 30.2 
inches builds over the lake wednesday.



lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
405 pm edt fri may 15 2026

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

$$