fzus63 kmqt 090900
glfls 
expires:202601092100;;045578

open lake forecast for lake superior
national weather service marquette mi
400 am est fri jan 9 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...

29.4 inch low pressure is over northern lake michigan this morning, 
headed for the ontario/quebec line by this afternoon. 30.2 inch 
ridging settles over the great lakes tonight as the low pushes into 
quebec, though a weak 30.1 inch low will approach over northwest 
ontario. this low will merge with another low moving into the great 
lakes from the southeast on saturday, making a 29.8 inch low near 
lakes ontario and erie saturday afternoon. saturday night, the low 
deepens to 29.6 inches over southern ontario while 30.5 inch high 
pressure builds over the plains. throughout sunday, the low will 
push east over the st. lawrence seaway while the high slides south 
of the great lakes. sunday night, a weak 29.9 inch trough pushes 
over lake superior associated with a 29.6 inch low over hudson bay. 
a weak 30.0 inch high then moves over the lake monday night ahead of 
a 29.4 inch low over lake winnipeg. this low deepens to 29.3 inches 
by tuesday evening near lake superior before moving to the 
ontario/quebec line wednesday afternoon. meanwhile, 30.5 inch high 
pressure moves over the dakotas.



lsz162-092100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est fri jan 9 2026 /300 am cst fri jan 9 2026/

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 090900
glfls 
expires:202601092100;;045579

open lake forecast for lake superior
national weather service marquette mi
400 am est fri jan 9 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...

29.4 inch low pressure is over northern lake michigan this morning, 
headed for the ontario/quebec line by this afternoon. 30.2 inch 
ridging settles over the great lakes tonight as the low pushes into 
quebec, though a weak 30.1 inch low will approach over northwest 
ontario. this low will merge with another low moving into the great 
lakes from the southeast on saturday, making a 29.8 inch low near 
lakes ontario and erie saturday afternoon. saturday night, the low 
deepens to 29.6 inches over southern ontario while 30.5 inch high 
pressure builds over the plains. throughout sunday, the low will 
push east over the st. lawrence seaway while the high slides south 
of the great lakes. sunday night, a weak 29.9 inch trough pushes 
over lake superior associated with a 29.6 inch low over hudson bay. 
a weak 30.0 inch high then moves over the lake monday night ahead of 
a 29.4 inch low over lake winnipeg. this low deepens to 29.3 inches 
by tuesday evening near lake superior before moving to the 
ontario/quebec line wednesday afternoon. meanwhile, 30.5 inch high 
pressure moves over the dakotas.



lsz263-092100-
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 est fri jan 9 2026

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

note, wave height forecasts are for ice free areas.

$$