fzus61 kbuf 301410
glflo 
expires:202603302100;;540011

open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt mon mar 30 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 frontal zone will stall near the lake tonight through 
tuesday. a 29.6 inch low will then move across southern ontario 
province tuesday evening before reaching the canadian maritimes 
wednesday, with a trailing cold front moving south across the lake. 
a 30.6 inch high will then build east across ontario and quebec 
wednesday through thursday. a 29.6 inch low is then forecast to move 
into the central great lakes thursday night before reaching southern 
quebec late friday.


loz062-302100-
lake ontario open waters from the niagara river to hamlin beach-
1009 am edt mon mar 30 2026

.this afternoon...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 3 feet. 
.tonight...southwest winds 5 to 15 knots becoming east. a chance
of showers late in the evening. showers with a chance of
thunderstorms after midnight. waves 1 to 3 feet. 
.tuesday...east winds 10 to 15 knots becoming southeast 15 to
20 knots. rain showers with a chance of thunderstorms. waves 1 to
3 feet building to 2 to 4 feet. 
.tuesday night...south winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms. waves 2 to 4 feet
building to 3 to 6 feet. 
.wednesday...northwest winds 15 to 25 knots becoming northeast.
rain showers likely during the day, then a chance of rain and
snow showers wednesday night. waves 3 to 5 feet building to 3 to
6 feet. 
.thursday...east winds to 30 knots becoming southeast. rain and
snow showers during the day, then rain showers thursday night.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.friday...south winds 15 to 25 knots becoming north and
diminishing to 10 to 15 knots. showers during the day, then a
chance of showers friday night. waves 3 to 6 feet subsiding to
2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 301410
glflo 
expires:202603302100;;540012

open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt mon mar 30 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 frontal zone will stall near the lake tonight through 
tuesday. a 29.6 inch low will then move across southern ontario 
province tuesday evening before reaching the canadian maritimes 
wednesday, with a trailing cold front moving south across the lake. 
a 30.6 inch high will then build east across ontario and quebec 
wednesday through thursday. a 29.6 inch low is then forecast to move 
into the central great lakes thursday night before reaching southern 
quebec late friday.


loz063>065-302100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1009 am edt mon mar 30 2026

.this afternoon...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.tonight...southwest winds 5 to 10 knots becoming northeast. a
chance of rain showers late in the evening. rain showers after
midnight, then rain showers with a chance of thunderstorms late.
waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots becoming east. rain
showers with a chance of thunderstorms. waves 2 feet or less. 
.tuesday night...south winds 10 to 15 knots becoming west 15 to
20 knots. rain showers with a chance of thunderstorms. waves
2 feet or less building to 3 to 6 feet. 
.wednesday...west winds 15 to 20 knots becoming northeast. rain
showers during the day, then a chance of rain and snow showers
wednesday night. waves 3 to 6 feet subsiding to 3 to 5 feet. 
.thursday...northeast winds 15 to 25 knots becoming southeast.
rain and snow showers during the day, then rain showers thursday
night. waves 4 to 7 feet. waves occasionally around 9 feet. 
.friday...south winds 15 to 25 knots becoming north. rain
showers. waves 3 to 6 feet subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301329
glfle 
expires:202603302015;;538636

open lake forecast for lake erie
national weather service cleveland oh
929 am edt mon mar 30 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 and remain north of the
lake through tuesday. low pressure 29.70 inches will enter the
great lakes on tuesday night and extend a cold front across the
lake by wednesday morning. this front will linger south of the
lake on wednesday and lift north of the lake on thursday. low
pressure 29.50 inches will enter the western lakes on thursday
night and extend a cold front across the lake on friday.


lez061-168-169-302015-
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-
929 am edt mon mar 30 2026

.this afternoon...southwest winds 10 to 15 knots. a chance of
showers late. waves 1 to 3 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. showers with a slight chance of thunderstorms in the
evening, then showers with a chance of thunderstorms after
midnight. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers in the afternoon. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms. waves 3 to 5 feet. 
.wednesday...northwest winds 5 to 15 knots becoming northeast
15 to 20 knots. a chance of rain showers during the day, then
rain showers likely wednesday night. waves 2 to 4 feet. 
.thursday...northeast winds 15 to 20 knots becoming south. rain
showers likely during the day, then rain likely thursday night.
waves 2 to 4 feet. 
.friday...southwest winds 15 to 20 knots becoming east 5 to
15 knots. rain likely during the day, then a chance of rain
friday night. waves 2 to 4 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301329
glfle 
expires:202603302015;;538634

open lake forecast for lake erie
national weather service cleveland oh
929 am edt mon mar 30 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 and remain north of the
lake through tuesday. low pressure 29.70 inches will enter the
great lakes on tuesday night and extend a cold front across the
lake by wednesday morning. this front will linger south of the
lake on wednesday and lift north of the lake on thursday. low
pressure 29.50 inches will enter the western lakes on thursday
night and extend a cold front across the lake on friday.


lez162>164-302015-
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-
929 am edt mon mar 30 2026

.this afternoon...southwest winds 10 to 15 knots. a slight chance
of showers and thunderstorms late. waves 1 to 2 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms early, then
showers likely with a chance of thunderstorms late in the
evening. a chance of showers and thunderstorms after midnight.
waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 20 knots. a chance of showers
and thunderstorms in the morning, then a chance of showers in the
afternoon. waves 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.wednesday...north winds 10 to 15 knots becoming east 15 to
20 knots. a chance of rain showers during the day, then rain
showers likely wednesday night. waves 1 to 3 feet building to
3 to 5 feet. 
.thursday...east winds 15 to 25 knots becoming southwest. a
chance of rain showers and thunderstorms during the day, then
rain thursday night. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 15 to 20 knots becoming east. rain
likely during the day, then a chance of rain friday night. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301329
glfle 
expires:202603302015;;538635

open lake forecast for lake erie
national weather service cleveland oh
929 am edt mon mar 30 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 and remain north of the
lake through tuesday. low pressure 29.70 inches will enter the
great lakes on tuesday night and extend a cold front across the
lake by wednesday morning. this front will linger south of the
lake on wednesday and lift north of the lake on thursday. low
pressure 29.50 inches will enter the western lakes on thursday
night and extend a cold front across the lake on friday.


lez165>167-302015-
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-
929 am edt mon mar 30 2026

.this afternoon...southwest winds 10 to 15 knots. a slight chance
of showers and thunderstorms late. waves 2 to 3 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers with a slight chance of
thunderstorms early, then showers with a chance of thunderstorms
from late evening on. waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots. a chance of showers
and thunderstorms in the morning, then a chance of showers in the
afternoon. waves 3 to 6 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms. waves 3 to 6 feet. 
.wednesday...north winds 10 to 15 knots becoming east 15 to
20 knots. a chance of rain showers during the day, then rain
showers likely wednesday night. waves 3 to 5 feet. 
.thursday...east winds 15 to 25 knots becoming southwest. a
chance of rain showers and thunderstorms during the day, then
rain likely with a chance of thunderstorms thursday night. waves
3 to 6 feet. 
.friday...southwest winds 15 to 25 knots becoming northeast 15 to
20 knots. rain likely during the day, then a chance of rain
friday night. waves 3 to 5 feet subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 301323
glfsc 
expires:202603302130;;538581

lake st clair forecast
national weather service detroit/pontiac mi
923 am edt mon mar 30 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 front stalls around central lake huron today with
southwest wind over southern lower mi and the south half of lake
huron. wind turns from the ne across central and northern lake
huron. showers and thunderstorms develop along and near this
frontal zone tonight and tuesday, with potential for strong to
severe storms as a strong cold front sweeps across the great
lakes tuesday night. marine conditions turn colder and remain
unsettled mid to late week.


lcz460-302130-
lake st clair-
923 am edt mon mar 30 2026

.rest of today...southwest winds 10 to 15 knots. partly sunny. waves
2 feet or less.
.tonight...south winds 10 to 15 knots. mostly cloudy. a chance of
light rain by midnight. a chance of thunderstorms after midnight.
light rain likely early in the morning. waves 2 feet or less.
.tuesday...southwest winds 15 to 20 knots. a chance of thunderstorms
early in the morning. a chance of light rain until late
afternoon...then light rain and a chance of thunderstorms early in
the afternoon. waves 1 to 3 feet.
.tuesday night...southwest winds 15 to 20 knots veering to the
northwest after midnight. rain and a chance of thunderstorms ...
then a chance of rain after midnight. waves 1 to 3 feet.
.wednesday...north winds 10 to 15 knots becoming northeast 15 to 20
knots in the evening. mostly cloudy with a chance of light rain.
waves 1 to 3 feet.
.thursday...south winds 15 to 20 knots. light rain. waves 1 to 3
feet.
.friday...north winds 20 to 25 knots. light rain. waves 2 to 4 feet.

$$

fzus63 kdtx 301322
glflh 
expires:202603302130;;538575

open lake forecast for lake huron
national weather service detroit/pontiac mi
922 am edt mon mar 30 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 front stalls around central lake huron today with
southwest wind over southern lower mi and the south half of lake
huron. wind turns from the ne across central and northern lake
huron. showers and thunderstorms develop along and near this
frontal zone tonight and tuesday, with potential for strong to
severe storms as a strong cold front sweeps across the great
lakes tuesday night. marine conditions turn colder and remain
unsettled mid to late week.


lhz361-302130-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
922 am edt mon mar 30 2026

.rest of today...northwest winds 5 to 10 knots. waves 1 to
3 feet. 
.tonight...northeast winds 5 to 10 knots becoming east 15 to
20 knots. a chance of rain after midnight. waves 1 to 3 feet
building to 2 to 4 feet early in the morning. 
.tuesday...east winds 15 to 20 knots decreasing to 10 to 15 knots
early in the afternoon. a chance of rain in the morning...then
rain in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.tuesday night...northeast winds 10 to 15 knots becoming
northwest 15 to 20 knots in the late evening and overnight. waves
4 to 6 feet. waves occasionally around 8 feet. 
.wednesday...northwest winds 15 to 20 knots becoming 5 to
10 knots late in the afternoon...then becoming east 15 to
20 knots with gusts to around 30 knots late in the evening. a
chance of snow late in the evening. waves 3 to 5 feet subsiding
to 1 to 3 feet late in the afternoon...then building to 6 to
9 feet late in the evening. waves occasionally around 12 feet. 
.thursday...east winds to 30 knots with gusts to 35 knot gales.
snow likely early in the morning. rain...freezing rain and snow.
sleet by midnight. waves 10 to 14 feet. waves occasionally around
18 feet. 
.friday...east winds 20 to 25 knots with gusts to around 30 knots
becoming northeast 15 to 20 knots. rain...snow and freezing rain
likely early in the morning...then a chance of rain and snow in
the late morning and early afternoon. waves 8 to 12 feet
subsiding to 3 to 5 feet . waves occasionally around 15 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 301322
glflh 
expires:202603302130;;538577

open lake forecast for lake huron
national weather service detroit/pontiac mi
922 am edt mon mar 30 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 front stalls around central lake huron today with
southwest wind over southern lower mi and the south half of lake
huron. wind turns from the ne across central and northern lake
huron. showers and thunderstorms develop along and near this
frontal zone tonight and tuesday, with potential for strong to
severe storms as a strong cold front sweeps across the great
lakes tuesday night. marine conditions turn colder and remain
unsettled mid to late week.


lhz462>464-302130-
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-
922 am edt mon mar 30 2026

.rest of today...south winds 5 to 10 knots. waves 1 to 3 feet. 
.tonight...northeast winds 5 to 10 knots. a chance of rain and
thunderstorms after midnight. waves 2 feet or less. 
.tuesday...south winds 10 to 15 knots. rain likely and a chance
of thunderstorms in the morning...then rain and a chance of
thunderstorms in the afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon. 
.tuesday night...southwest winds 15 to 20 knots veering to the
northwest after midnight. rain likely and a chance of
thunderstorms in the evening. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.wednesday...north winds 15 to 20 knots veering to the northeast
late in the evening. a chance of rain late in the afternoon. snow
and rain likely late in the evening. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.thursday...northeast winds 20 to 25 knots becoming east 15 to
20 knots until early evening...then increasing to 20 to 25 knots
by midnight. rain likely early in the morning. rain. waves 6 to
9 feet. waves occasionally around 12 feet. 
.friday...south winds 15 to 20 knots veering to the southwest in
the late morning and early afternoon...then becoming northwest
10 to 15 knots . rain early in the morning...then a chance of
rain in the late morning and early afternoon. a chance of rain by
midnight. waves 4 to 6 feet. 


$$

fzus63 kdtx 301322
glflh 
expires:202603302130;;538576

open lake forecast for lake huron
national weather service detroit/pontiac mi
922 am edt mon mar 30 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 front stalls around central lake huron today with
southwest wind over southern lower mi and the south half of lake
huron. wind turns from the ne across central and northern lake
huron. showers and thunderstorms develop along and near this
frontal zone tonight and tuesday, with potential for strong to
severe storms as a strong cold front sweeps across the great
lakes tuesday night. marine conditions turn colder and remain
unsettled mid to late week.


lhz362-363-302130-
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-
922 am edt mon mar 30 2026

.rest of today...south winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the afternoon. 
.tonight...northeast winds 5 to 10 knots becoming east 10 to
15 knots after midnight. a chance of rain after midnight. waves
1 to 3 feet building to 3 to 5 feet early in the morning. 
.tuesday...east winds 10 to 15 knots increasing to 15 to 20 knots
early in the afternoon. a chance of rain in the morning...then
rain and a chance of thunderstorms in the afternoon. waves 4 to
6 feet. waves occasionally around 8 feet. 
.tuesday night...northeast winds 15 to 20 knots backing to the
northwest by midnight...then increasing to 20 to 25 knots after
midnight. rain in the evening. waves 4 to 6 feet building to 6 to
9 feet after midnight. waves occasionally around 12 feet. 
.wednesday...north winds 15 to 20 knots veering to the northeast
late in the afternoon...then increasing to 20 to 25 knots with
gusts to around 30 knots late in the evening. a chance of snow
late in the evening. waves 5 to 7 feet building to 6 to 9 feet
late in the evening. waves occasionally around 12 feet. 
.thursday...northeast winds to 30 knots with gusts to 35 knot
gales. snow likely early in the morning. rain. freezing rain and
snow . waves 10 to 14 feet. waves occasionally around 18 feet. 
.friday...north winds 20 to 25 knots decreasing to 15 to 20 knots
in the late morning and early afternoon...then becoming northwest
10 to 15 knots early in the evening becoming north 15 to 20 knots
by midnight. a chance of rain until afternoon. waves 6 to 9 feet
subsiding to 4 to 6 feet by midnight. waves occasionally around
12 feet. 


$$

fzus63 kmkx 301425
glflm 
expires:202603302200;;540507

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
925 am cdt mon mar 30 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...

a frontal zone will sharpen over lake michigan today, with north
to northeasterly flow over northern portions of the lake and
southerly flow further south. the boundary between these two wind
patterns may setup as far north as sheboygan wi to manistee mi 
this morning, but should then sag south to a milwaukee wi to 
whitehall mi line into this evening (approximately), with both
wind flows becoming stronger far north and far south of the
boundary. some 20 to 30 kt gusts may occur over the northern and
southern thirds of the lake this evening into tonight as the
boundary sharpens. rounds of showers and thunderstorms are
expected tonight into tuesday across the lake, with a few stronger
storms possible at times (particularly along and south of the
frontal boundary). large hail would be the primary threat with any
stronger storms. 

the boundary sags further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm over
southern lake mi before washing it out later tuesday. gusty north
winds build in behind the front tuesday evening into wednesday,
with a chance for winds to reach gale force (current expectation
is gusts to 30 kt but no sustained or frequent gales). 

30.7 inch high pressure will shift from ontario to quebec through
the late week time period as 29.7 inch low pressure approaches 
from the southwest, allowing winds to trend east-northeasterly. 
will need to watch for additional isolated gale potential thursday
into friday as low pressure passes near or over lake michigan.


lmz261-362-364-366-563-565-567-868-302200-
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-
925 am cdt mon mar 30 2026

sheboygan wi to pentwater mi north...

.rest of today...west winds 5 to 10 kt veering to north 10 to
15 kt late this morning, then becoming northeast 10 to 20 kt this
afternoon. waves 2 to 4 ft. 
.tonight...northeast winds 15 to 25 kt increasing to 30 kt.
chance of rain and thunderstorms in the evening, then chance of
rain and slight chance of thunderstorms overnight. waves 3 to
5 ft. 
.tuesday...northeast winds to 30 kt becoming north 15 to 25 kt.
chance of thunderstorms in the morning, then chance of rain and
thunderstorms in the afternoon. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.tuesday night...north winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft. 
.wednesday...north winds 15 to 25 kt becoming northeast to 30 kt.
waves 6 to 9 ft occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming east. chance
of snow. waves 7 to 10 ft occasionally to 13 ft. 
.thursday...east gales to 40 kt becoming northeast gales to
35 kt. rain and freezing rain. waves 8 to 11 ft occasionally to
14 ft. 
.friday...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.  

$$

fzus63 kmkx 301425
glflm 
expires:202603302200;;540508

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
925 am cdt mon mar 30 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...

a frontal zone will sharpen over lake michigan today, with north
to northeasterly flow over northern portions of the lake and
southerly flow further south. the boundary between these two wind
patterns may setup as far north as sheboygan wi to manistee mi 
this morning, but should then sag south to a milwaukee wi to 
whitehall mi line into this evening (approximately), with both
wind flows becoming stronger far north and far south of the
boundary. some 20 to 30 kt gusts may occur over the northern and
southern thirds of the lake this evening into tonight as the
boundary sharpens. rounds of showers and thunderstorms are
expected tonight into tuesday across the lake, with a few stronger
storms possible at times (particularly along and south of the
frontal boundary). large hail would be the primary threat with any
stronger storms. 

the boundary sags further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm over
southern lake mi before washing it out later tuesday. gusty north
winds build in behind the front tuesday evening into wednesday,
with a chance for winds to reach gale force (current expectation
is gusts to 30 kt but no sustained or frequent gales). 

30.7 inch high pressure will shift from ontario to quebec through
the late week time period as 29.7 inch low pressure approaches 
from the southwest, allowing winds to trend east-northeasterly. 
will need to watch for additional isolated gale potential thursday
into friday as low pressure passes near or over lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-302200-
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-
925 am cdt mon mar 30 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 3 ft. 
.tonight...southeast winds 10 to 20 kt becoming south to 30 kt
late in the evening, then becoming southwest after midnight
becoming southwest to 30 kt late. chance of thunderstorms and
slight chance of rain in the evening, then chance of rain and
thunderstorms overnight. waves 3 to 5 ft. 
.tuesday...southwest winds 15 to 25 kt becoming west to 30 kt.
rain with a chance of thunderstorms in the afternoon. waves 3 to
5 ft. 
.tuesday night...north winds to 30 kt. chance of rain. waves 4 to
6 ft occasionally to 8 ft building to 4 to 7 ft occasionally to
9 ft. 
.wednesday...northeast winds to 30 kt. chance of rain in the
afternoon. waves 7 to 10 ft occasionally to 13 ft. 
.wednesday night...northeast winds to 30 kt becoming east. rain.
waves 8 to 11 ft occasionally to 14 ft. 
.thursday...east winds to 30 kt. rain. waves 8 to 11 ft
occasionally to 14 ft. 
.friday...northwest winds 15 to 25 kt becoming north 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.  

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539371

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon mar 30 2026 /901 am cdt mon mar 30 2026/

.rest of today...northeast winds 10 to 20 knots increasing to
20 to 30 knots. waves calm to 2 feet building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...east winds 20 to 30 knots diminishing to 15 to
25 knots late. a chance of rain and snow showers, possibly mixed
with freezing rain after midnight. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...northeast winds 15 to 25 knots backing northwest late.
a slight chance of freezing rain through early afternoon. a
chance of snow showers, possibly mixed with rain. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots veering north
after midnight. a slight chance of snow showers through midnight.
waves subsiding to 1 to 3 feet. 
.wednesday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves building to 2 to 4 feet. 
.wednesday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.thursday...east gales to 45 knots becoming northeast gales to
40 knots. a chance of snow showers, then snow showers likely.
waves building to 12 to 17 feet occasionally to 21 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet. 
.friday...northeast winds 20 to 30 knots becoming east gales to
35 knots. a chance of snow showers. rain showers likely. waves
subsiding to 6 to 9 feet occasionally to 11 feet, then building
to 9 to 12 feet occasionally to 15 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539372

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz263-302000-
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 mon mar 30 2026

.rest of today...northeast winds 5 to 15 knots increasing to
15 to 25 knots. waves calm to 2 feet building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots. a chance of snow and rain
showers after midnight. waves 3 to 6 feet occasionally to 8 feet.
.tuesday...east winds 15 to 25 knots backing northeast in the
afternoon, then becoming north 10 to 20 knots late. a slight
chance of freezing rain through early afternoon. a chance of snow
showers, possibly mixed with rain. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...north winds 10 to 20 knots. a slight chance of
snow showers through midnight. waves subsiding to 2 to 4 feet. 
.wednesday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...east gales to 40 knots backing northeast. a chance of
snow showers, then snow showers likely. waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet. 
.friday...northeast winds 20 to 30 knots becoming east gales to
35 knots. a chance of snow showers. a chance of rain showers.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 9 to 12 feet occasionally to 15 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539373

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt mon mar 30 2026

.rest of today...north winds 5 to 15 knots veering northeast in
the afternoon, then increasing to 10 to 20 knots late. a slight
chance of snow showers by mid afternoon. waves calm to 2 feet
building to 1 to 3 feet. 
.tonight...east winds 10 to 20 knots increasing to 15 to 25 knots
after midnight. a chance of snow showers after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...east winds 15 to 25 knots becoming northeast 10 to
20 knots late. snow showers likely, possibly mixed with freezing
rain and sleet through early afternoon, then a chance of snow
showers by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...north winds 10 to 20 knots. a slight chance of
snow showers through midnight. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...east gales to 40 knots. freezing spray. a chance of
snow showers, then snow showers likely. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.friday...northeast winds 20 to 30 knots becoming east gales to
35 knots. a chance of snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 8 to 11 feet
occasionally to 14 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539374

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt mon mar 30 2026

.rest of today...north winds 10 to 20 knots veering northeast in
the afternoon. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots increasing to 20 to
30 knots. a chance of snow showers, rain showers and freezing
rain after midnight. waves building to 3 to 6 feet occasionally
to 8 feet. 
.tuesday...east winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then backing northeast late. freezing
rain, possibly mixed with rain showers through early afternoon. a
chance of snow showers. a slight chance of freezing rain and
sleet by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...northwest winds 20 to 30 knots becoming north
15 to 25 knots after midnight. a slight chance of snow showers.
freezing spray after midnight. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...north winds 15 to 25 knots becoming northeast 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. freezing spray after midnight. waves
building to 5 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 40 knots. freezing spray. a chance of
snow showers, then snow showers, possibly mixed with rain and
freezing rain likely. waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.friday...northeast winds 20 to 30 knots becoming east gales to
35 knots. a chance of rain and snow showers. waves subsiding to
3 to 6 feet occasionally to 8 feet, then building to 9 to 12 feet
occasionally to 15 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539375

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz266-302000-
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 mon mar 30 2026

.rest of today...north winds 10 to 20 knots veering northeast
late. waves calm to 2 feet. 
.tonight...northeast winds 15 to 25 knots veering east after
midnight. a slight chance of rain showers. a slight chance of
freezing rain and snow showers after midnight. waves building to
3 to 6 feet occasionally to 8 feet. 
.tuesday...east winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. snow showers, possibly mixed with freezing rain through
early afternoon. rain showers likely, possibly mixed with sleet.
a chance of snow showers by mid afternoon. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...north winds 20 to 30 knots. a slight chance of
snow showers. freezing spray after midnight. waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.wednesday...north winds 15 to 25 knots becoming northeast 10 to
20 knots by mid afternoon. freezing spray through early
afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.thursday...east gales to 40 knots. freezing spray. a chance of
snow showers, then snow showers, possibly mixed with rain and
freezing rain likely. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.friday...northeast gales to 35 knots veering east. a chance of
rain and snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 8 to 11 feet
occasionally to 14 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202603302000;;539376

open lake forecast for lake superior
national weather service marquette mi
1000 am edt mon mar 30 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...

this morning, lake superior is between a 29.8 inch low over quebec, 
a 29.7 inch low over the central plains, a broad 30.2 inch high over 
the canadian prairie, and a 30.5 inch high off the east coast. 
tonight, as the quebec low and east coast high shift east, the 
canadian high shifts over far northern ontario. meanwhile, the 
plains low extends a weakening 29.7 inch trough over lake michigan 
and the lower peninsula. this trough lingers in place through 
tuesday before consolidating into a 29.8 inch low over the lower 
great lakes tuesday night while the canadian high builds to 30.4 
inches and extends a 30.3 inch ridge over north dakota. the ridge 
then builds along with the parent high to 30.5 inches extending from 
lake superior to james bay wednesday while the low departs to the 
east. by thursday morning, the high builds to 30.8 inches while a 
29.5 inch low develops over the central plains. this low passes just 
south of lake superior at 29.7 inches overnight into friday morning 
while another low of 29.6 inches develops over the oklahoma 
panhandle. this low approaches the bay of green bay saturday 
afternoon, tracking over eastern lake superior at near 29.4 inches 
by sunday morning.



lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt mon mar 30 2026

.rest of today...north winds 10 to 20 knots veering northeast
late. waves calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 15 to
25 knots after midnight. a slight chance of rain and snow
showers. a slight chance of freezing rain after midnight. waves
building to 2 to 4 feet. 
.tuesday...east winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then backing northeast late. rain
showers, possibly mixed with snow. sleet likely by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tuesday night...north winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of snow showers. freezing spray
after midnight. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.wednesday...north winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...east gales to 40 knots. snow showers likely. rain
showers likely. waves building to 6 to 10 feet occasionally to
13 feet. 
.friday...northeast winds 20 to 30 knots becoming east gales to
35 knots. a chance of rain and snow showers. waves subsiding to
2 to 4 feet, then building to 5 to 8 feet occasionally to
10 feet. 

$$