fzus61 kbuf 131402
glflo 
expires:202605132100;;491747

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 13 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 29.6 inch low over the central great lakes this 
morning will move slowly east, just to the north of lake ontario by 
this evening, then will weaken into a trough as it slowly drifts 
over eastern new york and new england thursday. a 30.0 inch high 
will then build from the central great lakes and ohio valley 
thursday night to the lower great lakes and mid atlantic friday, 
then off the carolina coast saturday. a 29.3 inch low over the 
central plains will then push its' warm front into the lower great 
lakes region sunday and sunday night.


loz063>065-132100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed may 13 2026

.rest of today...south winds 15 to 25 knots becoming southwest.
showers likely late this morning, then showers likely with a
chance of thunderstorms early this afternoon. a chance of showers
and thunderstorms late. waves 3 to 5 feet subsiding to 2 to
4 feet. 
.tonight...southwest winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.thursday...southwest winds 10 knots or less becoming northwest.
a chance of showers in the afternoon. waves 2 feet or less. 
.thursday night...west winds 5 to 10 knots becoming northwest. a
chance of showers. waves 2 feet or less. 
.friday...northwest winds 5 to 15 knots becoming south. a chance
of showers during the day. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming west. a chance of
showers. waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming east. a chance of
showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 131402
glflo 
expires:202605132100;;491746

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 13 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 29.6 inch low over the central great lakes this 
morning will move slowly east, just to the north of lake ontario by 
this evening, then will weaken into a trough as it slowly drifts 
over eastern new york and new england thursday. a 30.0 inch high 
will then build from the central great lakes and ohio valley 
thursday night to the lower great lakes and mid atlantic friday, 
then off the carolina coast saturday. a 29.3 inch low over the 
central plains will then push its' warm front into the lower great 
lakes region sunday and sunday night.


loz062-132100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt wed may 13 2026

.rest of today...south winds 15 to 20 knots becoming southwest. a
chance of showers. waves 2 to 4 feet. 
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers. waves 2 feet or less. 
.thursday night...northwest winds 5 to 10 knots. a chance of
showers in the evening. waves 1 foot or less. 
.friday...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.saturday...southwest winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 knots or less becoming east. a
chance of showers. waves 2 feet or less. 

$$

fzus61 kcle 131353
glfle 
expires:202605132015;;491396

open lake forecast for lake erie
national weather service cleveland oh
953 am edt wed may 13 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.60 inches continues to move across the eastern 
great lakes today, allowing for a cold front to exit to the east 
across lake erie late this morning. a trough averaging 29.90 
inches will remain across the lake through thursday. high pressure
30.10 inches will build across the region thursday night into 
friday. this high will move east friday night to allow a warm 
front to lift across the lake friday night into saturday.


lez165>167-132015-
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-
953 am edt wed may 13 2026

.rest of today...west winds 15 to 20 knots. a slight chance of
showers late this morning. waves 4 to 6 feet. 
.tonight...west winds 15 to 20 knots becoming northwest. a chance
of showers. waves 3 to 5 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely in the morning, then a chance of showers
in the afternoon. waves 3 to 5 feet subsiding to 2 to 3 feet. 
.thursday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...west winds 10 knots or less becoming south 10 to
15 knots. waves 1 to 3 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers saturday night. waves 1 to 3 feet. 
.sunday...southeast winds 5 to 10 knots becoming south. a chance
of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131353
glfle 
expires:202605132015;;491397

open lake forecast for lake erie
national weather service cleveland oh
953 am edt wed may 13 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.60 inches continues to move across the eastern 
great lakes today, allowing for a cold front to exit to the east 
across lake erie late this morning. a trough averaging 29.90 
inches will remain across the lake through thursday. high pressure
30.10 inches will build across the region thursday night into 
friday. this high will move east friday night to allow a warm 
front to lift across the lake friday night into saturday.


lez061-168-169-132015-
ripley to buffalo ny extending from 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-
953 am edt wed may 13 2026

.rest of today...southwest winds 15 to 20 knots becoming west. a
chance of showers with a slight chance of thunderstorms late this
morning, then a slight chance of showers and thunderstorms early
this afternoon. waves 3 to 6 feet. 
.tonight...west winds 15 to 20 knots. a chance of showers through
the early overnight, then showers likely late. waves 3 to 5 feet.
.thursday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely in the morning, then a chance of showers
in the afternoon. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...west winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers saturday night. waves 1 to 2 feet. 
.sunday...southeast winds 10 knots or less. a chance of showers.
waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131353
glfle 
expires:202605132015;;491395

open lake forecast for lake erie
national weather service cleveland oh
953 am edt wed may 13 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
low pressure 29.60 inches continues to move across the eastern 
great lakes today, allowing for a cold front to exit to the east 
across lake erie late this morning. a trough averaging 29.90 
inches will remain across the lake through thursday. high pressure
30.10 inches will build across the region thursday night into 
friday. this high will move east friday night to allow a warm 
front to lift across the lake friday night into saturday.


lez162>164-132015-
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-
953 am edt wed may 13 2026

.rest of today...west winds 15 to 20 knots. waves 3 to 5 feet. 
.tonight...northwest winds 15 to 20 knots. a slight chance of
showers early, then a chance of showers. a slight chance of
showers late. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of showers in the morning. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday night...north winds 10 knots or less becoming
southwest. waves 2 feet or less. 
.friday...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...southwest winds 5 to 15 knots. a chance of showers
saturday night. waves 2 feet or less. 
.sunday...southeast winds 5 to 15 knots becoming south. a chance
of showers and thunderstorms during the day, then a chance of
showers sunday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 131347
glfsc 
expires:202605132200;;491384

lake st clair forecast
national weather service detroit/pontiac mi
947 am edt wed may 13 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 of 29.60 inches tracking through lake
huron this morning will bring gusty west winds of 25 to 30 knots.
much lighter winds for thursday as high pressure arrives.


lcz460-132200-
lake st clair-
947 am edt wed may 13 2026

...small craft advisory in effect through this evening...

.rest of today...west winds 15 to 20 knots. mostly cloudy. waves 1
to 3 feet.
.tonight...northwest winds 15 to 20 knots. mostly cloudy. waves 1 to
3 feet.
.thursday...northwest winds 15 to 20 knots becoming north 10 to 15
knots early in the afternoon. mostly sunny. waves 1 to 3 feet.
.thursday night...north winds 10 to 15 knots diminishing to 5 to 10
knots by midnight...then becoming light and variable after midnight.
mostly clear. waves 2 feet or less.
.friday...southwest winds 5 to 10 knots becoming south 10 to 15
knots in the afternoon and evening. partly cloudy. waves 2 feet or
less.
.saturday...southwest winds 15 to 20 knots. mostly clear. waves 2
feet or less.
.sunday...southeast winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 131347
glflh 
expires:202605132200;;491381

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt wed may 13 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 of 29.60 inches tracking through lake
huron this morning will bring gusty west winds of 25 to 30 knots.
much lighter winds for thursday as high pressure arrives.


lhz361-362-132200-
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-
947 am edt wed may 13 2026

.rest of today...northwest winds 15 to 20 knots with gusts to
around 30 knots increasing to 20 to 25 knots with gusts to around
30 knots late in the afternoon. a chance of showers. waves 6 to
9 feet. waves occasionally around 12 feet. 
.tonight...northwest winds 15 to 20 knots. gusts to 30 knots in
the evening. a chance of showers in the evening. waves 6 to
9 feet. waves occasionally around 12 feet. 
.thursday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and afternoon. waves 3 to 5 feet. 
.thursday night...north winds 5 to 10 knots backing to the west
by midnight...then becoming light and variable after midnight.
waves 2 to 4 feet subsiding to 2 feet or less in the late evening
and overnight. 
.friday...south winds 5 to 10 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday...south winds 15 to 20 knots becoming southwest 10 to
15 knots until early evening...then becoming northwest 5 to
10 knots by midnight. waves 4 to 6 feet. 
.sunday...northeast winds 5 to 10 knots veering to the east early
in the evening...then increasing to 10 to 15 knots by midnight. a
chance of showers . waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and early afternoon...then building to 4 to
6 feet . waves occasionally around 8 feet. 


$$

fzus63 kdtx 131347
glflh 
expires:202605132200;;491382

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt wed may 13 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 of 29.60 inches tracking through lake
huron this morning will bring gusty west winds of 25 to 30 knots.
much lighter winds for thursday as high pressure arrives.


lhz363-462>464-132200-
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-
947 am edt wed may 13 2026

.rest of today...west winds 15 to 20 knots. a chance of showers
in the afternoon. waves 5 to 7 feet building to 6 to 9 feet late
in the afternoon. waves occasionally around 12 feet. 
.tonight...northwest winds 15 to 20 knots. gusts to 30 knots in
the evening. a chance of showers in the evening. waves 6 to
9 feet. waves occasionally around 12 feet. 
.thursday...northwest winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.thursday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 3 to 5 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.friday...south winds 5 to 10 knots increasing to 15 to 20 knots.
waves 2 feet or less building to 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday...southwest winds 10 to 15 knots. waves 3 to 5 feet. 
.sunday...north winds 5 to 10 knots veering to the northeast
until early evening...then increasing to 10 to 15 knots by
midnight. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet until early evening...then building to 2 to 4 feet by
midnight. 


$$

fzus63 kmkx 131407
glflm 
expires:202605132115;;491991

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
907 am cdt wed may 13 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...

gusty northwest winds will continue into today, as low
pressure around 29.6 inches over southeast ontario moves east of 
the region. a few gale force gusts may occur. lighter winds are 
then expected thursday, as high pressure around 30.1 inches moves 
southeast through the region. breezy southerly winds are expected 
to develop friday, with a few gales possible friday afternoon and 
evening in northern portions of the lake. south to southwest winds
then linger friday night into saturday. winds should then 
increase gradually for sunday, as a warm front moves northward 
into the region, ahead of low pressure around 29.2 inches in the 
central plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-132115-
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-
907 am cdt wed may 13 2026

sheboygan wi to pentwater mi south...

.rest of today...northwest winds to 30 kt becoming north. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...southeast winds 5 to 10 kt becoming south 10 to
20 kt overnight. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally
to 12 ft. 
.friday night...south winds to 30 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...southeast winds 10 to 20 kt. chance of rain showers.
waves 2 to 4 ft.  

$$

fzus63 kmkx 131407
glflm 
expires:202605132115;;491990

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
907 am cdt wed may 13 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...

gusty northwest winds will continue into today, as low
pressure around 29.6 inches over southeast ontario moves east of 
the region. a few gale force gusts may occur. lighter winds are 
then expected thursday, as high pressure around 30.1 inches moves 
southeast through the region. breezy southerly winds are expected 
to develop friday, with a few gales possible friday afternoon and 
evening in northern portions of the lake. south to southwest winds
then linger friday night into saturday. winds should then 
increase gradually for sunday, as a warm front moves northward 
into the region, ahead of low pressure around 29.2 inches in the 
central plains.


lmz261-362-364-366-563-565-567-868-132115-
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-
907 am cdt wed may 13 2026

sheboygan wi to pentwater mi north...

.rest of today...northwest winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.tonight...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 3 ft. 
.thursday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt increasing to gales to 35 kt.
chance of rain showers in the morning. waves 4 to 7 ft
occasionally to 9 ft building to 7 to 10 ft occasionally to
13 ft. 
.friday night...south gales to 35 kt becoming southwest to 30 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.saturday...southwest winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...northeast winds 10 to 20 kt becoming east. chance of
rain showers. waves 2 to 4 ft.  

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491713

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz162-132000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed may 13 2026 /901 am cdt wed may 13 2026/

.rest of today...northwest winds 5 to 15 knots backing southwest
late. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots backing northeast after
midnight, then veering east late. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.thursday night...east winds 15 to 25 knots veering south after
midnight. rain showers likely. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday night...southwest winds 20 to 30 knots veering west after
midnight. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots becoming northeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers, then rain showers likely.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491714

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz263-132000-
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 wed may 13 2026

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

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491715

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz264-132000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt wed may 13 2026

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

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491716

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz265-132000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt wed may 13 2026

.rest of today...northwest winds 20 to 30 knots diminishing to
15 to 25 knots late. waves 4 to 7 feet occasionally to 9 feet
subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering east in the
afternoon, then increasing to 15 to 25 knots late. waves building
to 2 to 4 feet. 
.thursday night...southeast winds 20 to 30 knots veering south
after midnight. a chance of rain showers after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots. a chance of rain showers
through early afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...south winds 20 to 30 knots veering west after
midnight. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.saturday...west gales to 40 knots becoming east 5 to 15 knots.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to calm to 2 feet. 
.sunday...east winds 15 to 25 knots increasing to 20 to 30 knots.
rain showers likely. waves building to 4 to 7 feet occasionally
to 9 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491717

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz266-132000-
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 wed may 13 2026

.rest of today...north winds 20 to 30 knots backing northwest in
the afternoon. waves 5 to 8 feet occasionally to 10 feet
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
waves subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots veering southeast in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.thursday night...southeast winds 20 to 30 knots becoming south
gales to 35 knots after midnight. a chance of rain showers after
midnight. waves building to 4 to 7 feet occasionally to 9 feet. 
.friday...south gales to 35 knots. rain showers likely through
early afternoon. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday night...south gales to 35 knots becoming southwest 20 to
30 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.saturday...west gales to 40 knots becoming north 5 to 15 knots.
waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 20 to 30 knots.
rain showers likely. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202605132000;;491718

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 13 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 29.6 inch low departs the region today, tracking over eastern 
ontario where it will stall through thursday morning. ridging moves 
back over lake superior in its wake and builds to 30.1 inches 
tonight into thursday. this ridging is pressed southeast to the 
lower great lakes late thursday into friday while a 29.1 inch low 
emanates off the canadian rockies. this low is expected to bring 
troughing of 29.6 inches over lake superior friday and friday night 
as it tracks to near james bay at 29.3 inches by saturday morning. 
ridging of 30.1 inches builds over the lake from northern ontario 
saturday night into sunday, followed by another 29.7 inch trough 
extending from the central plains early next week.



lsz267-132000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt wed may 13 2026

.rest of today...north winds 20 to 30 knots backing northwest in
the afternoon. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest in the
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south winds 20 to 30 knots. a chance of rain showers
through early afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 35 knots becoming northeast 5 to
15 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$