fzus61 kbuf 192002
glflo 
expires:202605200300;;308217

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue may 19 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...an 29.6 inch area of low pressure over western quebec 
this evening will swing a cold front across the lake late tonight. a 
large 30.4 inch area of surface high pressure will then build across 
the entire great lakes region wednesday afternoon through thursday, 
before sliding east off the new england coast late friday. this 
surface high will then strengthen to 30.6 inches as it anchors over 
atlantic canada through sunday.  a 29.9 inch low and attendant warm 
front will then slowly approach the lake later friday night and 
saturday, before weakening and sliding eastward sunday with the 
large area of high pressure over atlantic canada.


loz063>065-200300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue may 19 2026

.tonight...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers and thunderstorms early, then
showers likely with a chance of thunderstorms late this evening.
showers likely after midnight. waves 2 to 4 feet. 
.wednesday...west winds 15 to 20 knots. a chance of showers
early. waves 2 to 4 feet building to 3 to 6 feet. 
.wednesday night...west winds 15 to 20 knots becoming north 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming west. waves
1 to 3 feet subsiding to 1 foot or less. 
.thursday night...west winds less than 10 knots. waves 1 foot or
less. 
.friday...east winds 5 to 15 knots increasing to 15 to 20 knots.
a chance of showers friday night. waves 1 to 3 feet. 
.saturday...east winds 15 to 20 knots becoming southeast. showers
likely. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.sunday...southeast winds 15 to 20 knots becoming south 10 to
15 knots. showers likely during the day, then a chance of showers
sunday night. waves 2 to 4 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 192002
glflo 
expires:202605200300;;308216

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue may 19 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...an 29.6 inch area of low pressure over western quebec 
this evening will swing a cold front across the lake late tonight. a 
large 30.4 inch area of surface high pressure will then build across 
the entire great lakes region wednesday afternoon through thursday, 
before sliding east off the new england coast late friday. this 
surface high will then strengthen to 30.6 inches as it anchors over 
atlantic canada through sunday.  a 29.9 inch low and attendant warm 
front will then slowly approach the lake later friday night and 
saturday, before weakening and sliding eastward sunday with the 
large area of high pressure over atlantic canada.


loz062-200300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt tue may 19 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191937
glfle 
expires:202605200215;;307424

open lake forecast for lake erie
national weather service cleveland oh
337 pm edt tue may 19 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front tracks southeast across lake erie tonight. pressure
rises wednesday and a ridge averaging 30.30 inches over the lake 
builds in for thursday. low pressure 30.00 inches moves in from 
the southwest over the western end of lake erie friday into 
saturday. 



lez164-200215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
337 pm edt tue may 19 2026

...severe thunderstorm watch 230 in effect until 7 pm edt this
evening...

.tonight...southwest winds 15 to 20 knots becoming northwest
10 to 15 knots. showers with thunderstorms likely early, then
showers with a chance of thunderstorms. a chance of showers with
a slight chance of thunderstorms late. some thunderstorms may
produce damaging winds early. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.wednesday...north winds 10 to 15 knots becoming northeast. a
slight chance of showers early. waves 1 to 3 feet. 
.wednesday night...northeast winds 10 to 15 knots increasing to
15 to 20 knots. waves 2 to 4 feet. 
.thursday...northeast winds 15 to 20 knots. waves 3 to 5 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east.
waves 3 to 5 feet. 
.friday...east winds 15 to 20 knots. showers likely during the
day, then showers with a chance of thunderstorms friday night.
waves 3 to 5 feet. 
.saturday...southeast winds 15 to 20 knots becoming southwest
5 to 15 knots. showers likely with a chance of thunderstorms
during the day, then a chance of showers saturday night. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming north. a chance
of showers and thunderstorms during the day. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191937
glfle 
expires:202605200215;;307423

open lake forecast for lake erie
national weather service cleveland oh
337 pm edt tue may 19 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front tracks southeast across lake erie tonight. pressure
rises wednesday and a ridge averaging 30.30 inches over the lake 
builds in for thursday. low pressure 30.00 inches moves in from 
the southwest over the western end of lake erie friday into 
saturday. 



lez165>167-200215-
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-
337 pm edt tue may 19 2026

.tonight...southwest winds 15 to 20 knots becoming northwest
10 to 15 knots. showers with a chance of thunderstorms through
the early overnight, then a chance of showers with a slight
chance of thunderstorms late. waves 2 to 4 feet. 
.wednesday...north winds 10 to 15 knots. a slight chance of
showers early. waves 1 to 3 feet. 
.wednesday night...north winds 10 to 15 knots becoming northeast
15 to 20 knots. waves 2 to 4 feet. 
.thursday...northeast winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 5 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east.
waves 3 to 5 feet. 
.friday...east winds 15 to 20 knots. a chance of showers during
the day, then showers friday night. waves 3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming south 5 to
15 knots. showers with a chance of thunderstorms during the day,
then a chance of showers saturday night. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.sunday...south winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers sunday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191937
glfle 
expires:202605200215;;307425

open lake forecast for lake erie
national weather service cleveland oh
337 pm edt tue may 19 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front tracks southeast across lake erie tonight. pressure
rises wednesday and a ridge averaging 30.30 inches over the lake 
builds in for thursday. low pressure 30.00 inches moves in from 
the southwest over the western end of lake erie friday into 
saturday. 



lez061-168-169-200215-
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-
337 pm edt tue may 19 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191937
glfle 
expires:202605200215;;307422

open lake forecast for lake erie
national weather service cleveland oh
337 pm edt tue may 19 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front tracks southeast across lake erie tonight. pressure
rises wednesday and a ridge averaging 30.30 inches over the lake 
builds in for thursday. low pressure 30.00 inches moves in from 
the southwest over the western end of lake erie friday into 
saturday. 



lez162-163-200215-
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-
337 pm edt tue may 19 2026

...severe thunderstorm watch 230 in effect until 7 pm edt this
evening...

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 192038
glflh 
expires:202605200445;;310149

open lake forecast for lake huron
national weather service detroit/pontiac mi
438 pm edt tue may 19 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region this evening,
veering winds from southwest to northwest. strong to severe
thunderstorms will be possible ahead of this cold front. high
pressure, 30.50 inches, then builds in mid-week.


lhz362-363-462-200445-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
438 pm edt tue may 19 2026

.today...south winds 10 to 15 knots increasing to 15 to 20 knots
in the late morning and afternoon. scattered showers in the
afternoon. waves 3 to 5 feet building to 5 to 7 feet in the
afternoon. waves occasionally around 10 feet. 
.tonight...southwest winds 15 to 20 knots veering to the
northwest in the late evening and overnight. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.wednesday...northwest winds 15 to 20 knots. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.wednesday night...north winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. waves 3 to 5 feet. 
.thursday...northeast winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.friday...east winds 10 to 15 knots becoming northeast 15 to
20 knots . a chance of showers by midnight. waves 1 to 3 feet
building to 4 to 6 feet . waves occasionally around 8 feet. 
.saturday...east winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. showers likely until
afternoon...then a chance of showers . waves 4 to 6 feet. 


$$

fzus63 kdtx 192038
glflh 
expires:202605200445;;310150

open lake forecast for lake huron
national weather service detroit/pontiac mi
438 pm edt tue may 19 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region this evening,
veering winds from southwest to northwest. strong to severe
thunderstorms will be possible ahead of this cold front. high
pressure, 30.50 inches, then builds in mid-week.


lhz463-464-200445-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
438 pm edt tue may 19 2026

.today...south winds 5 to 10 knots increasing to 10 to 15 knots
late in the morning...then increasing to 15 to 20 knots early in
the afternoon decreasing to 10 to 15 knots late in the afternoon.
scattered showers and thunderstorms in the afternoon. some
thunderstorms may be severe with damaging winds and large hail.
waves 2 to 4 feet. 
.tonight...southwest winds 10 to 15 knots. a chance of showers
and scattered thunderstorms in the evening...then a chance of
showers after midnight. some thunderstorms may be severe with
damaging winds and large hail. waves 3 to 5 feet. 
.wednesday...north winds 10 to 15 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.wednesday night...north winds 10 to 15 knots. waves 3 to 5 feet.
.thursday...north winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet late in the morning...then building to
2 to 4 feet late in the afternoon. 
.friday...east winds 10 to 15 knots increasing to 15 to 20 knots
by midnight. a chance of showers early in the evening. rain
showers likely by midnight. waves 2 to 4 feet building to 4 to
6 feet . waves occasionally around 8 feet. 
.saturday...east winds 20 to 25 knots decreasing to 10 to
15 knots. showers likely until afternoon...then a chance of
showers . waves 4 to 6 feet subsiding to 1 to 3 feet by midnight.
waves occasionally around 8 feet. 


$$

fzus63 kdtx 192038
glflh 
expires:202605200445;;310148

open lake forecast for lake huron
national weather service detroit/pontiac mi
438 pm edt tue may 19 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region this evening,
veering winds from southwest to northwest. strong to severe
thunderstorms will be possible ahead of this cold front. high
pressure, 30.50 inches, then builds in mid-week.


lhz361-200445-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
438 pm edt tue may 19 2026

.today...east winds 5 to 10 knots increasing to 10 to 15 knots
late in the morning...then veering to the south early in the
afternoon becoming southwest 15 to 20 knots late in the
afternoon. scattered showers. waves 2 to 4 feet building to 3 to
5 feet in the late morning and afternoon. 
.tonight...northwest winds 15 to 20 knots increasing to 20 to
25 knots early in the morning. scattered showers in the evening.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
afternoon. waves 5 to 7 feet. waves occasionally around 10 feet. 
.wednesday night...northwest winds 15 to 20 knots becoming north
5 to 10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet after
midnight. 
.thursday...northeast winds 5 to 10 knots veering to the east.
waves 2 feet or less. 
.friday...east winds 5 to 10 knots increasing to 15 to 20 knots.
a chance of. waves 2 feet or less building to 5 to 7 feet. waves
occasionally around 10 feet. 
.saturday...east winds 20 to 25 knots with gusts to around
30 knots increasing to 30 knots with gusts to 35 knot gales in
the late morning and early afternoon...then decreasing to 20 to
25 knots with gusts to around 30 knots early in the evening
decreasing to 15 to 20 knots by midnight. a chance of showers.
waves 6 to 9 feet subsiding to 3 to 5 feet by midnight. waves
occasionally around 12 feet. 


$$

fzus63 kdtx 191846
glfsc 
expires:202605200300;;305447

lake st clair forecast
national weather service detroit/pontiac mi
246 pm edt tue may 19 2026

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

.synopsis...a cold front sweeps across the region this evening,
veering winds from southwest to northwest. strong to severe
thunderstorms will be possible ahead of this cold front. high
pressure, 30.50 inches, then builds in mid-week.


lcz460-200300-
lake st clair-
246 pm edt tue may 19 2026

...small craft advisory in effect until 10 pm edt this evening...
...severe thunderstorm watch 230 in effect until 7 pm edt this
evening...

.tonight...southwest winds 15 to 20 knots diminishing to 10 to 15
knots late in the evening...then veering to the northwest after
midnight becoming north 15 to 20 knots early in the morning. partly
cloudy this evening becoming mostly cloudy. numerous showers and
thunderstorms early in the evening.. then a chance of light showers
by midnight. some thunderstorms may produce damaging winds and large
hail early in the evening. waves 1 to 3 feet.
.wednesday...north winds 15 to 20 knots diminishing to 10 to 15
knots late in the morning...then diminishing to 5 to 10 knots early
in the afternoon becoming northeast 10 to 15 knots late in the
afternoon. mostly cloudy. waves 1 to 3 feet.
.wednesday night...northeast winds 15 to 20 knots diminishing to 10
to 15 knots after midnight. mostly cloudy early in the evening
becoming partly cloudy. waves 1 to 3 feet.
.thursday...northeast winds 10 to 15 knots. mostly sunny. waves 2
feet or less.
.thursday night...northeast winds 10 to 15 knots increasing to 15 to
20 knots after midnight. partly cloudy. waves 1 to 3 feet.
.friday...east winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to 30 knots in the evening. mostly cloudy. a chance of
showers in the afternoon. rain showers likely in the evening. waves
1 to 3 feet building to 2 to 4 feet in the evening. a small craft
advisory may be needed.
.saturday...east winds 20 to 25 knots with gusts to 30 knots.
showers. waves 2 to 4 feet.
.sunday...west winds 5 to 10 knots. mostly cloudy with a chance of
showers. waves 2 feet or less.

$$

fzus63 kmkx 192018
glflm 
expires:202605200330;;309460

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
318 pm cdt tue may 19 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 westerly winds are developing in the wake of a cold front
this afternoon. gusts up to 30 kt will be possible right behind
the front and then winds will gradually diminish overnight. high 
pressure around 30.4 inches will then move into the northern great
lakes on wednesday. modest northeast winds are expected wednesday
afternoon through thursday, especially over the south half. winds
will remain easterly through saturday as strong high pressure
around 30.5 tracks across ontario and quebec and a weak low 
pressure trough around 29.8 inches sets up in the plains. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
318 pm cdt tue may 19 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.wednesday night...north winds 15 to 25 kt becoming northeast
10 to 20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft. 
.thursday...east winds 10 to 15 kt becoming north 10 to 20 kt.
waves 2 to 4 ft. 
.thursday night...northeast winds 10 to 20 kt becoming east.
waves 3 to 5 ft. 
.friday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
chance of rain showers. waves 3 to 5 ft. 
.friday night...east winds 15 to 25 kt. showers likely. waves
4 to 6 ft occasionally to 8 ft. 
.saturday...east winds 10 to 20 kt becoming north 10 to 15 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...west winds 5 to 10 kt backing to southeast. waves 1 ft
or less.  

$$

fzus63 kmkx 192018
glflm 
expires:202605200330;;309459

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
318 pm cdt tue may 19 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 westerly winds are developing in the wake of a cold front
this afternoon. gusts up to 30 kt will be possible right behind
the front and then winds will gradually diminish overnight. high 
pressure around 30.4 inches will then move into the northern great
lakes on wednesday. modest northeast winds are expected wednesday
afternoon through thursday, especially over the south half. winds
will remain easterly through saturday as strong high pressure
around 30.5 tracks across ontario and quebec and a weak low 
pressure trough around 29.8 inches sets up in the plains. 


lmz261-362-364-366-563-565-567-868-200330-
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-
318 pm cdt tue may 19 2026

sheboygan wi to pentwater mi north...

.tonight...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft subsiding to 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt. waves 1 to 3 ft. 
.thursday...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.thursday night...northeast winds 10 to 20 kt becoming east 10 to
15 kt. waves 1 to 3 ft. 
.friday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.friday night...east winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.saturday...east winds to 30 kt becoming northeast. chance of
showers. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...southwest winds 10 to 15 kt. waves 1 ft or less.  

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308169

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz265-200800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue may 19 2026

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

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308170

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz266-200800-
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 19 2026

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

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308167

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz263-200800-
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 19 2026

.late this afternoon...west winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest in
the afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. a chance of rain showers.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308166

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue may 19 2026 /301 pm cdt tue may 19 2026/

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing south in the
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots backing
northeast after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...northeast winds 10 to 20 knots. a chance of rain
showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308171

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz267-200800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue may 19 2026

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

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308168

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz264-200800-
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 19 2026

.late this afternoon...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...north winds 10 to 20 knots backing northwest after
midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest
late. waves subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves building to 1 to
3 feet. 
.saturday...east winds 10 to 20 knots becoming southeast 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$