fzus61 kbuf 122252
glflo 
expires:202605130315;;459167

open lake forecast for lake ontario
national weather service buffalo ny
652 pm edt tue may 12 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 30.3 inch high draped from the carolinas to new york 
state will settle off the mid-atlantic coast this evening. a 29.6 
inch low over the central great lakes tonight will move to a little 
north of lake ontario by wednesday evening, then weaken into a 
trough over eastern new york and new england thursday. a 30.1 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 29.2 inch low over the 
central plains will then push its warm front into the lower lakes 
region on sunday.


loz062-130315-
lake ontario open waters from the niagara river to hamlin beach-
652 pm edt tue may 12 2026

.tonight...east winds 5 to 10 knots becoming southeast and
increasing to 15 to 20 knots. a chance of showers early, then
showers from late evening on. waves 1 to 3 feet. 
.wednesday...south winds 15 to 20 knots becoming southwest.
showers early, then a chance of showers. waves 2 to 4 feet. 
.wednesday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.thursday...west winds 5 to 15 knots becoming northwest. waves
1 to 2 feet. 
.thursday night...northwest winds 5 to 10 knots. waves around
1 foot. 
.friday...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.saturday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming east. waves 2 feet or
less. 

$$

fzus61 kbuf 122252
glflo 
expires:202605130315;;459168

open lake forecast for lake ontario
national weather service buffalo ny
652 pm edt tue may 12 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 30.3 inch high draped from the carolinas to new york 
state will settle off the mid-atlantic coast this evening. a 29.6 
inch low over the central great lakes tonight will move to a little 
north of lake ontario by wednesday evening, then weaken into a 
trough over eastern new york and new england thursday. a 30.1 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 29.2 inch low over the 
central plains will then push its warm front into the lower lakes 
region on sunday.


loz063>065-130315-
lake ontario open waters from hamlin beach to the saint lawrence
river-
652 pm edt tue may 12 2026

.tonight...east winds 5 to 15 knots becoming southeast 15 to
20 knots. showers from late evening on. waves 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots becoming southwest.
showers in the morning, then showers likely in the afternoon.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.wednesday night...southwest winds 5 to 15 knots. a chance of
showers. waves 1 to 3 feet. 
.thursday...southwest winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.thursday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.friday...northwest winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.saturday...south winds 10 to 15 knots becoming west. a chance of
showers. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming southeast. waves 1 to
3 feet subsiding to 1 foot or less. 

$$

fzus61 kcle 121943
glfle 
expires:202605130215;;452177

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt tue may 12 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a warm front will cross the lake today. low pressure 29.60 inches
will move southeast across the great lakes tonight into wednesday.
this low will extend a cold front across the lake by wednesday
night. a trough averaging 29.90 inches will remain across the lake
on thursday. high pressure 30.10 inches will move through the
region thursday night into friday. a warm front will move across
the lake on friday night into saturday.


lez162>164-130215-
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-
343 pm edt tue may 12 2026

.tonight...southeast winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers with a slight
chance of thunderstorms late this evening. showers with a slight
chance of thunderstorms after midnight, then showers likely late.
waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west. a
slight chance of showers early. waves 2 to 4 feet. 
.wednesday night...northwest winds 15 to 20 knots. waves 2 to
4 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 1 to 3 feet. 
.thursday night...north winds 10 knots or less becoming
southwest. waves 2 feet or less. 
.friday...southwest winds 5 to 15 knots becoming south. waves
2 feet or less. 
.saturday...southwest winds 5 to 15 knots becoming northwest.
waves 1 to 2 feet. 
.sunday...east winds 5 to 15 knots becoming south. a chance of
showers and thunderstorms during the day, then a chance of
showers sunday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121943
glfle 
expires:202605130215;;452178

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt tue may 12 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a warm front will cross the lake today. low pressure 29.60 inches
will move southeast across the great lakes tonight into wednesday.
this low will extend a cold front across the lake by wednesday
night. a trough averaging 29.90 inches will remain across the lake
on thursday. high pressure 30.10 inches will move through the
region thursday night into friday. a warm front will move across
the lake on friday night into saturday.


lez165>167-130215-
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-
343 pm edt tue may 12 2026

.tonight...east winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. a slight chance of showers early,
then a chance of showers with a slight chance of thunderstorms
late this evening. showers with a slight chance of thunderstorms
after midnight. waves 1 to 3 feet building to 3 to 6 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west. a
chance of showers early, then a slight chance of showers late in
the morning. waves 3 to 6 feet building to 4 to 7 feet, then
subsiding to 3 to 5 feet. waves occasionally around 9 feet. 
.wednesday night...west winds 15 to 20 knots becoming northwest.
a chance of showers overnight. waves 3 to 5 feet subsiding to
2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 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...southwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.sunday...east winds 5 to 15 knots becoming south. a chance of
showers sunday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121943
glfle 
expires:202605130215;;452179

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt tue may 12 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a warm front will cross the lake today. low pressure 29.60 inches
will move southeast across the great lakes tonight into wednesday.
this low will extend a cold front across the lake by wednesday
night. a trough averaging 29.90 inches will remain across the lake
on thursday. high pressure 30.10 inches will move through the
region thursday night into friday. a warm front will move across
the lake on friday night into saturday.


lez061-168-169-130215-
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-
343 pm edt tue may 12 2026

.tonight...east winds 5 to 10 knots becoming south and increasing
to 15 to 20 knots. a slight chance of showers this evening, then
showers with a slight chance of thunderstorms after midnight.
waves 1 foot or less building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west.
showers early, then a chance of showers with a slight chance of
thunderstorms late in the morning. a slight chance of showers and
thunderstorms early in the afternoon. waves 3 to 5 feet building
to 4 to 7 feet. waves occasionally around 9 feet. 
.wednesday night...west winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 3 to 5 feet subsiding to
2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers in the morning. waves 2 to 4 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...southwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.sunday...southeast winds 10 knots or less. a chance of showers
sunday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121939
glfsc 
expires:202605130345;;452004

lake st clair forecast
national weather service detroit/pontiac mi
339 pm edt tue may 12 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 29.70 inches will track west to east
across the northern great lakes through wednesday. this system
will bring increasing south winds this afternoon and evening,
followed by gusty west and northwest winds for wednesday. showers
and a few thunderstorms accompany the arrival of this system this
evening and into the overnight hours.


lcz460-130345-
lake st clair-
339 pm edt tue may 12 2026

...small craft advisory in effect from 10 pm edt this evening
through wednesday evening...

.tonight...southeast winds 15 to 20 knots becoming southwest 20 to
25 knots after midnight. light showers by midnight. a chance of
light showers early in the morning. waves 1 to 3 feet.
.wednesday...west winds 15 to 20 knots. mostly cloudy. waves 1 to 3
feet.
.wednesday night...northwest winds 15 to 20 knots. cloudy. waves 1
to 3 feet.
.thursday...north winds 15 to 20 knots. mostly cloudy early in the
morning becoming 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...west 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 and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 121938
glflh 
expires:202605130345;;452002

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt tue may 12 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 29.70 inches will track west to east
across the northern great lakes through wednesday. this system
will bring increasing south winds this afternoon and evening,
followed by gusty west and northwest winds for wednesday. showers
and a few thunderstorms accompany the arrival of this system this
evening and into the overnight hours.


lhz363-462>464-130345-
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-
338 pm edt tue may 12 2026

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


$$

fzus63 kdtx 121938
glflh 
expires:202605130345;;452001

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt tue may 12 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 29.70 inches will track west to east
across the northern great lakes through wednesday. this system
will bring increasing south winds this afternoon and evening,
followed by gusty west and northwest winds for wednesday. showers
and a few thunderstorms accompany the arrival of this system this
evening and into the overnight hours.


lhz361-362-130345-
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-
338 pm edt tue may 12 2026

.tonight...east winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots early in the morning. a
chance of showers. waves 8 to 12 feet. waves occasionally around
15 feet. 
.wednesday...north winds 10 to 15 knots becoming west 15 to
20 knots late in the morning...then becoming northwest 20 to
25 knots with gusts to around 30 knots in the afternoon. a chance
of showers in the morning...then showers likely in the afternoon.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.wednesday night...northwest winds 15 to 20 knots. a chance of
showers in the evening. waves 5 to 7 feet. waves occasionally
around 10 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...west winds 5 to 10 knots  becoming light and
variable. waves 2 to 4 feet subsiding to 2 feet or less in the
late evening and overnight. 
.friday...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers late in the evening. waves 1 to
3 feet building to 4 to 6 feet. waves occasionally around 8 feet.
.saturday...southwest winds 15 to 20 knots veering to the west
early in the evening...then becoming northwest 10 to 15 knots by
midnight. a chance of showers early in the morning. waves 4 to
6 feet. 
.sunday...northwest winds 5 to 10 knots veering to the northeast
in the late morning and early afternoon...then becoming east
10 to 15 knots early in the evening increasing to 15 to 20 knots
by midnight. a chance of showers . waves 2 to 4 feet building to
4 to 6 feet . waves occasionally around 8 feet. 


$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457383

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz261-362-130330-
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-
501 pm cdt tue may 12 2026

rock island passage to charlevoix mi north...

.tonight...southeast winds 15 to 25 kt backing to northwest to
30 kt. rain showers and slight chance of thunderstorms this
evening, then chance of rain showers overnight. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday...northwest winds to 30 kt. slight chance of rain
showers in the morning. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.wednesday night...northwest winds 15 to 25 kt becoming north
10 to 20 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft. 
.thursday night...southwest 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 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft. 
.saturday...southwest winds 15 to 25 kt becoming west. waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...east winds 10 to 15 kt increasing to 10 to 20 kt.
chance of rain showers. waves 1 to 2 ft building to 1 to 3 ft.  

$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457384

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz364-366-563-565-567-868-130330-
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-
501 pm cdt tue may 12 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

...gale warning in effect until 11 pm cdt this evening...

.tonight...south gales to 35 kt veering to northwest winds to 30
kt around midnight. chance of rain showers and slight chance of 
thunderstorms this evening, then slight chance of rain showers 
overnight. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...north winds to 30 kt diminishing to 10 to
20 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.thursday night...south winds 5 to 10 kt increasing to 10 to
20 kt overnight. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
5 to 8 ft occasionally to 10 ft building to 7 to 10 ft
occasionally to 13 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft. 
.saturday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457385

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz669-671-870-872-130330-
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 whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
501 pm cdt tue may 12 2026

sheboygan wi to pentwater mi south to north point light wi to
grand haven mi...

...gale warning in effect until 11 pm cdt this evening...

.tonight...southwest gales to 35 kt veering to northwest winds to
30 kt around midnight. chance of rain showers and thunderstorms 
this evening. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 
to 6 ft occasionally to 8 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...north winds to 30 kt becoming northwest 10 to
20 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.thursday night...southeast winds 10 to 15 kt becoming south
10 to 20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.saturday...southwest winds 10 to 20 kt. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457386

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz080-673-675-777-779-874-876-878-130330-
lake michigan from michigan city in to st. joseph mi 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 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-
501 pm cdt tue may 12 2026

north point light wi to grand haven mi south...

.tonight...southwest winds to 30 kt veering to northwest. chance
of showers and slight chance of thunderstorms this evening. waves
4 to 6 ft occasionally to 8 ft. 
.wednesday...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. 
.wednesday night...north winds to 30 kt becoming northwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.thursday night...southeast winds 10 to 15 kt becoming south.
waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds 15 to 25 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt. chance of showers. waves
3 to 5 ft.  

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452565

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue may 12 2026 /301 pm cdt tue may 12 2026/

.late this afternoon...north winds 15 to 25 knots. scattered rain
showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots diminishing to 5 to
15 knots after midnight, then backing northwest late. a slight
chance of rain showers through midnight. waves subsiding to 1 to
3 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots becoming south 20 to
30 knots after midnight. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...west winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 25 knots becoming northeast 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.sunday...northeast winds 20 to 30 knots. a chance of rain
showers, then rain showers likely. waves building to 3 to 6 feet
occasionally to 8 feet. 

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452566

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz263-130800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt tue may 12 2026

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

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452567

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt tue may 12 2026

...gale warning in effect until 6 pm edt this evening...

.late this afternoon...east winds 20 to 30 knots. numerous rain
showers, possibly mixed with snow. waves 5 to 8 feet occasionally
to 10 feet. 
.tonight...northeast winds 15 to 25 knots backing north after
midnight. a slight chance of snow showers through midnight. a
chance of rain showers. waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 15 to 25 knots becoming south
20 to 30 knots 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 building to 4 to 8 feet occasionally to 10 feet.
.friday night...southwest winds 15 to 25 knots becoming west
gales to 35 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then 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 15 to 25 knots veering southeast. a chance
of rain showers. waves building to 4 to 7 feet occasionally to
9 feet. 

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452568

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue may 12 2026

...gale warning in effect until 6 pm edt this evening...

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

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452569

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz266-130800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt tue may 12 2026

...gale warning in effect until 6 pm edt this evening...

.late this afternoon...southeast winds 20 to 30 knots. numerous
rain showers. waves 5 to 8 feet occasionally to 10 feet. 
.tonight...east winds 20 to 30 knots backing north after
midnight. rain showers likely through midnight, then a chance of
rain showers after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 5 to 8 feet occasionally
to 10 feet. 
.wednesday...north winds 20 to 30 knots backing northwest in the
afternoon. a slight chance of rain showers through early
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet.
.wednesday night...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 less than 10 knots becoming southeast
10 to 20 knots by mid afternoon. 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 40 knots. rain showers likely through
early afternoon. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.saturday...west gales to 35 knots becoming north 10 to 20 knots.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 1 to 3 feet. 
.sunday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. a chance of rain showers, then rain showers likely.
waves building to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 122002
glfls 
expires:202605130800;;452570

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 12 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 29.7 inch clipper low will move across upper michigan through this 
evening. as the clipper departs eastward early wednesday, ridging 
moves back over lake superior and builds to 30.1 inches wednesday 
night 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 into 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.



lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue may 12 2026

.late this afternoon...southeast winds 20 to 30 knots. numerous
rain showers. waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet. 
.tonight...east winds 20 to 30 knots becoming northeast 10 to
20 knots after midnight, then becoming north 15 to 25 knots late.
rain showers likely through midnight, then a chance of rain
showers after midnight. waves subsiding to 2 to 4 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 20 to 30 knots backing northwest in the
afternoon. a chance of rain showers through early afternoon.
waves 3 to 6 feet occasionally to 8 feet. 
.wednesday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves subsiding to 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. rain showers likely 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, then building to 4 to 7 feet occasionally
to 9 feet. 
.saturday...west gales to 35 knots becoming northwest 10 to
20 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 1 to 3 feet. 
.sunday...east winds 10 to 20 knots becoming southeast 15 to
25 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 

$$