fzus63 kmqt 252001
glfls 
expires:202603260800;;285990

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed mar 25 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 extending over lake superior will slowly shift 
south and east tonight as an 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. on sunday night a 29.8 inch trough will move over lake, 
with ridging of 30.2 inches making its way back into the area by 
monday night.



lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt wed mar 25 2026 /300 pm cdt wed mar 25 2026/

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

$$

fzus63 kmqt 252001
glfls 
expires:202603260800;;285991

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed mar 25 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 extending over lake superior will slowly shift 
south and east tonight as an 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. on sunday night a 29.8 inch trough will move over lake, 
with ridging of 30.2 inches making its way back into the area by 
monday night.



lsz263-260800-
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 pm edt wed mar 25 2026

.late this afternoon...north winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots. a slight chance of
snow showers after midnight. waves building to 2 to 4 feet. 
.thursday...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. 
.thursday night...northeast winds 10 to 20 knots becoming north
5 to 15 knots late. a slight chance of snow showers after
midnight. waves subsiding to 1 to 3 feet. 
.friday...northwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. a slight chance of snow showers. waves
subsiding to calm to 2 feet, then 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...south winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...south winds 5 to 15 knots becoming northwest 15 to
25 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. 

$$