fzus63 kmqt 100301
glfls 
expires:202601100900;;089242

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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...

ridging will strengthen to 30.2 inches over the great lakes by 
midnight tonight. then, a weak 30.0 inch low will drop out of 
ontario by early tomorrow morning. this low will merge with another 
low moving into the ohio basin tomorrow, making a 29.8 inch low near 
lakes ontario and erie tomorrow afternoon. tomorrow 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.



lsz162-100900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est fri jan 9 2026 /900 pm cst fri jan 9 2026/

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 100301
glfls 
expires:202601100900;;089243

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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...

ridging will strengthen to 30.2 inches over the great lakes by 
midnight tonight. then, a weak 30.0 inch low will drop out of 
ontario by early tomorrow morning. this low will merge with another 
low moving into the ohio basin tomorrow, making a 29.8 inch low near 
lakes ontario and erie tomorrow afternoon. tomorrow 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.



lsz263-100900-
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-
1000 pm est fri jan 9 2026

.rest of tonight...southwest winds 5 to 15 knots. a chance of
snow showers. waves calm to 2 feet building to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots 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 2 to 4 feet, then subsiding to 1 to 3 feet. 
.saturday night...north winds 20 to 30 knots. freezing spray. 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. 
.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...southwest gales to 35 knots veering west after
midnight. 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. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.monday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 20 to 30 knots becoming north gales to
35 knots. a chance of rain and snow showers. freezing spray.
waves building to 7 to 10 feet occasionally to 13 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$