fzus63 kmqt 260801
glfls 
expires:202603262000;;311931

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 26 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 trough over lake superior will slowly shift south and 
east today as expansive 30.7 inch high pressure builds from central 
canada over much of the northern conus by friday. this will maintain 
30.4 inch ridging over lake superior through sunday morning as the 
30.7 inch high shifts to the mid-atlantic. a 29.8 inch trough will 
move over lake sunday night, with ridging of 30.2 inches returning 
by monday night.



lsz162-262000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu mar 26 2026 /300 am cdt thu mar 26 2026/

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

$$

fzus63 kmqt 260801
glfls 
expires:202603262000;;311932

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu mar 26 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 trough over lake superior will slowly shift south and 
east today as expansive 30.7 inch high pressure builds from central 
canada over much of the northern conus by friday. this will maintain 
30.4 inch ridging over lake superior through sunday morning as the 
30.7 inch high shifts to the mid-atlantic. a 29.8 inch trough will 
move over lake sunday night, with ridging of 30.2 inches returning 
by monday night.



lsz263-262000-
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 26 2026

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

$$