fzus63 kmqt 092101
glfls 
expires:202601100900;;074946

open lake forecast for lake superior
national weather service marquette mi
400 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...

weak ridging is building over the great lakes this evening, 
strengthening to 30.2 inches by midnight. then, a weak 30.0 inch low 
will drop out of ontario by early saturday morning. this low will 
merge with another low moving into the ohio basin 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.



lsz162-100900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est fri jan 9 2026 /300 pm cst fri jan 9 2026/

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.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 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 3 to 6 feet occasionally to 8 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 092101
glfls 
expires:202601100900;;074947

open lake forecast for lake superior
national weather service marquette mi
400 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...

weak ridging is building over the great lakes this evening, 
strengthening to 30.2 inches by midnight. then, a weak 30.0 inch low 
will drop out of ontario by early saturday morning. this low will 
merge with another low moving into the ohio basin 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.



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

.late this afternoon...west winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots. a chance of snow
showers after midnight. waves subsiding to calm to 2 feet, then
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 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...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.

$$