fzus63 kmqt 062101
glfls 
expires:202601070900;;903992

open lake forecast for lake superior
national weather service marquette mi
400 pm est tue jan 6 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 25.6 inch low over southern lower michigan this afternoon moves 
over lake ontario by this evening, maintaining a 29.6 inch trough 
over lake superior tonight. ridging of 29.7 inches then moves over 
lake superior on wednesday ahead of a 29.5 inch low arriving over 
northern ontario on thursday. meanwhile, a 29.4 inch colorado low 
will quickly track northeast across lower michigan thursday night 
and into quebec by friday afternoon. in its wake, another deepening 
low pressure of at least 29.6 inches will develop near lower 
michigan late saturday before lifting northeast into the canadian 
maritimes by sunday. a 30.5 inch high will build into the southern 
plains on sunday, extending a 30.2 inch ridge north to lake superior.



lsz162-070900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est tue jan 6 2026 /300 pm cst tue jan 6 2026/

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...west winds 10 to 20 knots backing southwest late.
waves calm to 2 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots late. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering west in the
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.saturday...north gales to 35 knots. a chance of snow. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 
.sunday...west winds 15 to 25 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 062101
glfls 
expires:202601070900;;903993

open lake forecast for lake superior
national weather service marquette mi
400 pm est tue jan 6 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 25.6 inch low over southern lower michigan this afternoon moves 
over lake ontario by this evening, maintaining a 29.6 inch trough 
over lake superior tonight. ridging of 29.7 inches then moves over 
lake superior on wednesday ahead of a 29.5 inch low arriving over 
northern ontario on thursday. meanwhile, a 29.4 inch colorado low 
will quickly track northeast across lower michigan thursday night 
and into quebec by friday afternoon. in its wake, another deepening 
low pressure of at least 29.6 inches will develop near lower 
michigan late saturday before lifting northeast into the canadian 
maritimes by sunday. a 30.5 inch high will build into the southern 
plains on sunday, extending a 30.2 inch ridge north to lake superior.



lsz263-070900-
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 est tue jan 6 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet. 
.wednesday night...southwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering west in the
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.friday...north winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...north winds 5 to 15 knots becoming east 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...northeast gales to 35 knots backing north. a chance
of snow. freezing spray. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.sunday...west winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$