fzus63 kdtx 200736
glflh 
expires:202603201545;;994262

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 am edt fri mar 20 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 compact clipper tracks across northern lake huron
this morning. weak high pressure follows on saturday before a
strong cold front sinks south across the region with gusty
northeast wind on sunday. stronger high pressure follows on
monday with another cold front expected tuesday.


lhz361-362-201545-
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-
336 am edt fri mar 20 2026

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

wave heights are for ice free areas.

$$

fzus63 kdtx 200736
glflh 
expires:202603201545;;994263

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 am edt fri mar 20 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 compact clipper tracks across northern lake huron
this morning. weak high pressure follows on saturday before a
strong cold front sinks south across the region with gusty
northeast wind on sunday. stronger high pressure follows on
monday with another cold front expected tuesday.


lhz363-201545-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
336 am edt fri mar 20 2026

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


$$

fzus63 kdtx 200736
glflh 
expires:202603201545;;994264

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 am edt fri mar 20 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 compact clipper tracks across northern lake huron
this morning. weak high pressure follows on saturday before a
strong cold front sinks south across the region with gusty
northeast wind on sunday. stronger high pressure follows on
monday with another cold front expected tuesday.


lhz462>464-201545-
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-
336 am edt fri mar 20 2026

.today...southeast winds 10 to 20 knots becoming south late in 
the morning...then veering northwest late in the afternoon. rain 
likely in the morning. waves 3 to 5 feet subsiding to 2 to 4 feet 
late in the afternoon. 
.tonight...north winds 10 to 15 knots decreasing to 5 to 10 knots
by midnight...then backing to the northwest early in the morning.
waves 1 to 3 feet. 
.saturday...northwest winds 5 to 10 knots backing to the
southeast early in the afternoon. waves 2 feet or less. 
.saturday night...southeast winds 5 to 10 knots increasing to
10 to 15 knots in the late evening and overnight. a chance of
rain after midnight. waves 1 to 3 feet. 
.sunday...south winds 10 to 15 knots becoming north 15 to
20 knots. a chance of rain. waves 2 to 4 feet building to 5 to
7 feet. waves occasionally around 10 feet. 
.monday...north winds 15 to 20 knots decreasing to 5 to 10 knots.
waves 3 to 5 feet. 
.tuesday...south winds 10 to 15 knots veering to the west by
midnight. waves 1 to 3 feet building to 2 to 4 feet. 


$$

fzus63 kmkx 200759
glflm 
expires:202603201515;;994639

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt fri mar 20 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...

south to southwest winds continue as a low pressure around 29.7
inches moves southeast through northern lower michigan. winds will
shift to northwest to north later this morning as cold front
shifts across the lake behind the exiting low. tonight winds will
become light as high pressure around 30.3 inches builds in from
ontario. 

low pressure around 29.5 inches develops in the lee of the 
wyoming rockies saturday morning, shifting winds south. the low 
should move southeastward saturday night, allowing winds to 
increase and shift to the north and northeast across the northern
half of the lake. 

the low should move across central illinois into indiana sunday, 
as it deepens to around 29.4 inches. this should lead to northerly
winds backing to northwesterly sunday into sunday night across the
lake. a few gales are possible during this timeframe. high 
pressure around 30.5 inches should then bring decreasing winds 
for monday.


lmz261-362-364-366-563-565-567-868-201515-
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-
259 am cdt fri mar 20 2026

sheboygan wi to pentwater mi north...

.today...west winds 10 to 20 kt becoming north 10 to 15 kt.
patchy fog this morning. chance of light freezing rain and slight
chance of rain this morning. waves 2 to 4 ft. 
.tonight...north winds 10 to 15 kt backing to southwest 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.saturday...south winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt backing to north 10 to
20 kt. chance of rain in the evening, then chance of rain and
light freezing rain overnight. waves 2 to 4 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
rain in the morning. waves 4 to 6 ft occasionally to 8 ft
building to 5 to 8 ft occasionally to 10 ft. 
.sunday night...north winds to 30 kt diminishing to 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.monday...north winds 10 to 20 kt becoming northwest. waves 3 to
5 ft subsiding to 2 to 4 ft. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 200759
glflm 
expires:202603201515;;994640

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt fri mar 20 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...

south to southwest winds continue as a low pressure around 29.7
inches moves southeast through northern lower michigan. winds will
shift to northwest to north later this morning as cold front
shifts across the lake behind the exiting low. tonight winds will
become light as high pressure around 30.3 inches builds in from
ontario. 

low pressure around 29.5 inches develops in the lee of the 
wyoming rockies saturday morning, shifting winds south. the low 
should move southeastward saturday night, allowing winds to 
increase and shift to the north and northeast across the northern
half of the lake. 

the low should move across central illinois into indiana sunday, 
as it deepens to around 29.4 inches. this should lead to northerly
winds backing to northwesterly sunday into sunday night across the
lake. a few gales are possible during this timeframe. high 
pressure around 30.5 inches should then bring decreasing winds 
for monday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
259 am cdt fri mar 20 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt veering to north. waves 3 to
5 ft subsiding to 2 to 4 ft. 
.tonight...north winds 10 to 15 kt becoming east 5 to 10 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 5 to 10 kt increasing to 10 to 15 kt
late in the morning, then becoming south 10 to 20 kt in the
afternoon. waves 1 to 2 ft building to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt becoming west 10 to
20 kt. waves 3 to 5 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
rain. waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.sunday night...north winds to 30 kt diminishing to 15 to 25 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.monday...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994694

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri mar 20 2026 /300 am cdt fri mar 20 2026/

.early this morning...west winds 10 to 20 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots backing east late. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northeast late. snow showers
likely through early afternoon. a chance of rain showers. a
slight chance of snow showers by mid afternoon. waves building to
1 to 3 feet. 
.saturday night...northeast winds 15 to 25 knots. a chance of
rain and snow showers. waves building to 3 to 6 feet occasionally
to 8 feet. 
.sunday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots 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. 
.sunday night...east winds 5 to 15 knots veering west after
midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots becoming northeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994695

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz263-202000-
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 fri mar 20 2026

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

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994696

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt fri mar 20 2026

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

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994697

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt fri mar 20 2026

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

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994698

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz266-202000-
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 fri mar 20 2026

.early this morning...south winds 15 to 25 knots. patchy fog.
waves 3 to 5 feet occasionally to 7 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of snow showers, possibly
mixed with rain. waves building to 2 to 4 feet. 
.saturday night...east winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. a chance of snow showers, possibly
mixed with rain. waves building to 5 to 8 feet occasionally to
10 feet. 
.sunday...northeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. freezing spray through early
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet.
.sunday night...northeast winds 10 to 20 knots backing north
after midnight. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 10 to 20 knots becoming south gales to
35 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 7 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 35 knots becoming north 20 to 30 knots.
freezing spray. waves building to 8 to 11 feet occasionally to
14 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 200800
glfls 
expires:202603202000;;994699

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri mar 20 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.7 inch clipper low over western lake superior this morning 
moves over the lower great lakes by this afternoon, replaced briefly 
by 30.0 inch high pressure over the lake tonight. troughing of around 
29.6 inches returns to the lake on saturday as a 29.4 inch low moves 
onto the northern plains this weekend. behind the troughing, 30.4 
inch ridging builds into the great lakes and northern plains by 
monday. a 29.8 inch clipper low tracking across northern ontario on 
tuesday briefly extends a 30.0 inch trough over the lake. a 30.5 
inch high quickly follows behind it for wednesday.



lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt fri mar 20 2026

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

$$