fzus63 kdtx 190718
glflh 
expires:202603191530;;941609

open lake forecast for lake huron
national weather service detroit/pontiac mi
318 am edt thu mar 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 weakening cold front and diffuse pressure pattern
dominate the great lakes thursday, followed by a compact clipper
that tracks through on friday. weak high pressure this weekend
before a strong cold front sinks across the region with gusty
northeast wind on sunday.


lhz361-362-191530-
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-
318 am edt thu mar 19 2026

.today...west winds 10 to 15 knots becoming northwest 5 to
10 knots late in the afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet in the afternoon. 
.tonight...west winds 5 to 10 knots backing to the southeast by
midnight...then becoming south 10 to 15 knots early in the
morning. a chance of snow after midnight. waves 1 to 3 feet. 
.friday...south winds 15 to 20 knots becoming southwest 10 to
15 knots in the late morning and early afternoon...then veering
to the northwest early in the afternoon. a chance of rain in the
morning. waves 2 to 4 feet. 
.friday night...west winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and overnight. waves 2 to 4 feet. 
.saturday...west winds 10 to 15 knots backing to the south late
in the afternoon...then becoming east 15 to 20 knots late in the
evening. a chance of rain and snow late in the afternoon. a
chance of snow late in the evening. waves 3 to 5 feet building to
5 to 7 feet late in the evening. waves occasionally around
10 feet. 
.sunday...northeast winds 15 to 20 knots increasing to 20 to
25 knots. a chance of rain early in the morning. a chance of
snow. waves 8 to 12 feet. waves occasionally around 15 feet. 
.monday...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 . waves 6 to 9 feet subsiding to 3 to 5 feet .
waves occasionally around 12 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 190718
glflh 
expires:202603191530;;941610

open lake forecast for lake huron
national weather service detroit/pontiac mi
318 am edt thu mar 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 weakening cold front and diffuse pressure pattern
dominate the great lakes thursday, followed by a compact clipper
that tracks through on friday. weak high pressure this weekend
before a strong cold front sinks across the region with gusty
northeast wind on sunday.


lhz363-462>464-191530-
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-
318 am edt thu mar 19 2026

.today...southwest winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.tonight...north winds 5 to 10 knots veering to the east late in
the evening...then veering to the southeast after midnight
increasing to 10 to 15 knots early in the morning. a chance of
rain and snow after midnight. waves 2 feet or less. 
.friday...south winds 15 to 20 knots decreasing to 10 to 15 knots
in the late morning and early afternoon...then becoming west 5 to
10 knots early in the afternoon. a chance of rain in the morning.
waves 1 to 3 feet building to 2 to 4 feet in the late morning and
afternoon. 
.friday night...north winds 5 to 10 knots backing to the
northwest after midnight. waves 1 to 3 feet. 
.saturday...west winds 10 to 15 knots backing to the east late in
the afternoon. a chance of rain and snow late in the evening.
waves 2 to 4 feet building to 5 to 7 feet. waves occasionally
around 10 feet. 
.sunday...northeast winds 15 to 20 knots becoming north 20 to
25 knots . a chance of rain and snow. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.monday...north winds 20 to 25 knots decreasing to 10 to
15 knots. waves 6 to 9 feet subsiding to 3 to 5 feet . waves
occasionally around 12 feet. 


$$

fzus63 kmkx 190805
glflm 
expires:202603191530;;942952

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 am cdt thu mar 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...

low pressure around 29.9 inches will advance toward southern 
hudson bay through daybreak as high pressure around 30.1 inches 
builds into wi from the northern great plains. thus anticipate 
that the current southwest winds will trend light and variable
through this morning. another low pressure around 29.7 inches will
develop in the canadian great plains this afternoon, allowing 
winds to turn east-southeasterly across lake michigan. winds will
increase and veer south to southwesterly across the waters 
tonight as the low pressure progresses over or just north of the 
northern half of lake michigan. some rain or snow is possible over
northern lake michigan during the low's passage, with wind gusts 
expected to remain below gale thresholds. winds will then turn 
west-northwesterly friday as a cold front moves across the 
waters.

winds will become light friday night through saturday morning as 
high pressure around 30.0 inches moves across lake michigan. 
increasing southerly winds are expected saturday afternoon as a 
cold front approaches from the north. the front is expected to 
cross lake michigan saturday night into sunday morning, bringing 
gusty northerly winds into monday morning. rain and snow showers 
will accompany the passing cold front. widespread gales are not 
anticipated at this time, though trends will be monitored over 
coming forecasts. winds will decrease monday night, ultimately 
turning southerly and increasing once again during the day on 
tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-191530-
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-
305 am cdt thu mar 19 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 5 to 10 kt veering to east. chance of
rain this morning. waves 1 to 2 ft subsiding to nearly calm. 
.tonight...east winds 5 to 10 kt becoming southeast late in the
evening, then becoming south 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt veering to northwest 10 to
15 kt. waves 2 to 4 ft. 
.friday night...north winds 5 to 10 kt. waves 1 to 3 ft. 
.saturday...south winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday night...south winds 10 to 15 kt becoming west 10 to
20 kt. waves 2 to 4 ft building to 3 to 5 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
rain. waves 5 to 8 ft occasionally to 10 ft building to 7 to
10 ft occasionally to 13 ft. 
.monday...north winds to 30 kt diminishing to 10 to 20 kt. waves
8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.  

$$

fzus63 kmkx 190805
glflm 
expires:202603191530;;942951

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 am cdt thu mar 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...

low pressure around 29.9 inches will advance toward southern 
hudson bay through daybreak as high pressure around 30.1 inches 
builds into wi from the northern great plains. thus anticipate 
that the current southwest winds will trend light and variable
through this morning. another low pressure around 29.7 inches will
develop in the canadian great plains this afternoon, allowing 
winds to turn east-southeasterly across lake michigan. winds will
increase and veer south to southwesterly across the waters 
tonight as the low pressure progresses over or just north of the 
northern half of lake michigan. some rain or snow is possible over
northern lake michigan during the low's passage, with wind gusts 
expected to remain below gale thresholds. winds will then turn 
west-northwesterly friday as a cold front moves across the 
waters.

winds will become light friday night through saturday morning as 
high pressure around 30.0 inches moves across lake michigan. 
increasing southerly winds are expected saturday afternoon as a 
cold front approaches from the north. the front is expected to 
cross lake michigan saturday night into sunday morning, bringing 
gusty northerly winds into monday morning. rain and snow showers 
will accompany the passing cold front. widespread gales are not 
anticipated at this time, though trends will be monitored over 
coming forecasts. winds will decrease monday night, ultimately 
turning southerly and increasing once again during the day on 
tuesday.


lmz261-362-364-366-563-565-567-868-191530-
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-
305 am cdt thu mar 19 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 5 to 10 kt backing to southeast. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.tonight...southeast winds 5 to 10 kt becoming south 10 to 15 kt
late in the evening, then increasing to 10 to 20 kt after
midnight becoming south 10 to 20 kt late. slight chance of rain
with a chance of light freezing rain overnight. waves 1 to 2 ft
building to 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming northwest 10 to
15 kt. waves 2 to 4 ft. 
.friday night...northwest winds 5 to 10 kt becoming west. waves
1 to 2 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
1 to 3 ft. 
.saturday night...east winds 10 to 15 kt becoming northeast 10 to
20 kt. chance of rain and snow. waves 2 to 4 ft building to 3 to
5 ft. 
.sunday...northeast winds 15 to 25 kt increasing to 30 kt. chance
of snow. waves 6 to 9 ft occasionally to 12 ft. 
.monday...north winds 15 to 25 kt becoming northwest 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.  

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942587

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz264-192000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt thu mar 19 2026

.early this morning...north winds 5 to 15 knots. waves 1 to
3 feet. 
.today...north winds 5 to 15 knots becoming southeast less than
10 knots in the afternoon, then increasing to 5 to 15 knots late.
waves subsiding to calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight, then becoming west 5 to 15 knots late. snow showers,
possibly mixed with rain through midnight, then a chance of rain
showers, possibly mixed with snow after midnight. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.friday...north winds 5 to 15 knots backing west late. waves
subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.saturday...north winds 10 to 20 knots veering northeast by mid
afternoon. a chance of rain showers through early afternoon. a
chance of snow showers. waves building to 2 to 4 feet. 
.saturday night...northeast winds 20 to 30 knots. a chance of
snow showers. freezing spray after midnight. waves building to
5 to 8 feet occasionally to 10 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 10 to
20 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.monday...northwest winds 10 to 20 knots becoming southwest gales
to 35 knots. waves subsiding to calm to 2 feet, then building to
6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942588

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz265-192000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt thu mar 19 2026

.early this morning...north winds 10 to 20 knots. waves calm to
2 feet. 
.today...north winds 5 to 15 knots becoming southeast 10 to
20 knots late. waves calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots veering south after
midnight, then veering west late. snow showers, possibly mixed
with rain through midnight, then a chance of rain showers after
midnight. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing west late. waves
subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves calm to 2 feet. 
.saturday...north winds 15 to 25 knots veering northeast by mid
afternoon. a chance of snow showers, possibly mixed with rain.
waves building to 2 to 4 feet. 
.saturday night...northeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers.
freezing spray after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.monday...northwest winds 15 to 25 knots becoming southwest gales
to 35 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942589

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz266-192000-
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-
400 am edt thu mar 19 2026

.early this morning...northwest winds 15 to 25 knots. waves 1 to
3 feet. 
.today...north winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then veering southeast late. waves subsiding to
calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots veering south after
midnight. a chance of snow showers, possibly mixed with rain
through midnight, then snow showers, possibly mixed with rain
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots veering northeast by
mid afternoon. a chance of snow showers, possibly mixed with
rain. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.saturday night...northeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers.
freezing spray after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northeast gales to 35 knots becoming north 15 to
25 knots. freezing spray. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.monday...northwest winds 15 to 25 knots becoming southwest gales
to 35 knots. waves subsiding to 2 to 4 feet, then building to
8 to 11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942590

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz267-192000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt thu mar 19 2026

.early this morning...northwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...north winds 10 to 20 knots backing northwest in the
afternoon, then becoming west 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 15 to
25 knots after midnight, then veering south late. a chance of
snow showers through midnight, then snow showers, possibly mixed
with rain, freezing rain and sleet after midnight. waves building
to 2 to 4 feet. 
.friday...west winds 10 to 20 knots veering northwest in the
afternoon. a slight chance of rain and snow showers through early
afternoon. waves subsiding to 1 to 3 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots becoming northeast
10 to 20 knots by mid afternoon. a chance of snow showers,
possibly mixed with rain. waves subsiding to 1 to 3 feet. 
.saturday night...northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers. freezing
spray after midnight. waves building to 3 to 6 feet occasionally
to 8 feet. 
.sunday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 5 feet occasionally to 7 feet. 
.monday...northwest winds 10 to 20 knots becoming south gales to
35 knots. freezing spray. a chance of snow showers. waves
subsiding to 2 to 4 feet, then building to 8 to 11 feet
occasionally to 14 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942585

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu mar 19 2026 /300 am cdt thu mar 19 2026/

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...northeast winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. a slight
chance of rain and snow showers by mid afternoon. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then veering west late. a chance of snow
and rain showers through midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 10 to
20 knots late. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of snow showers, possibly
mixed with rain. waves building to 2 to 4 feet. 
.saturday night...northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.sunday...northeast winds 15 to 25 knots becoming northwest 5 to
15 knots. a chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202603192000;;942586

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 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 29.8 inch clipper low over northern ontario lifts towards james 
bay by morning. behind this low, weak ridging of around 30.1 inches 
builds over lake superior on today ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.8 inches. while another low moves through northern ontario 
towards the north short of lake superior friday night, another low 
stretches into the northern plains around the same time. together, 
these lows are expected to bring about troughing of around around 
29.8 inch over lake superior on saturday into sunday. behind the 
troughing, 30.4 inch ridging builds into the great lakes and 
northern plains by monday.



lsz263-192000-
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-
400 am edt thu mar 19 2026

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...northeast winds 5 to 15 knots veering east in the
afternoon. a slight chance of snow showers by mid afternoon.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest after
midnight, then veering west late. a chance of snow showers
through midnight. a chance of rain showers. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves building to 2 to
4 feet. 
.saturday night...northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.sunday...northeast winds 20 to 30 knots becoming northwest 10 to
20 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.monday...northwest winds 10 to 20 knots becoming southwest 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet. 

$$