fzus63 kmqt 042101
glfls 
expires:202601050900;;791372

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun jan 4 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 29.6 inch low over the northern plains this afternoon diminishes 
to 29.8 inches as it arrives over the upper great lakes monday 
morning. by midday monday another 29.6 inch low develops over the 
central plains. the low then moves into lake michigan tuesday, 
reaching southern ontario tuesday evening as it deepens to 29.5 
inches. weak ridging of around 29.8 inches then moves over lake 
superior on wednesday ahead of a 29.6 inch low arriving over 
northern ontario thursday morning. this low brings a trough across 
the lake thursday before escaping to the east by friday morning, 
replaced by a 30.0 inch ridge.



lsz162-050900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sun jan 4 2026 /300 pm cst sun jan 4 2026/

.late this afternoon...southeast winds 10 to 20 knots. snow
showers. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots becoming south 5 to
15 knots by midnight, then veering west late. snow showers in the
evening. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.monday...northeast winds 5 to 15 knots veering southwest. waves
calm to 2 feet. 
.monday night...south winds 5 to 15 knots veering west late.
waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots. a slight chance of rain
showers and freezing rain in the morning. a slight chance of snow
showers. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 
.friday...west winds 10 to 20 knots becoming north 15 to
25 knots. waves building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 042101
glfls 
expires:202601050900;;791373

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun jan 4 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 29.6 inch low over the northern plains this afternoon diminishes 
to 29.8 inches as it arrives over the upper great lakes monday 
morning. by midday monday another 29.6 inch low develops over the 
central plains. the low then moves into lake michigan tuesday, 
reaching southern ontario tuesday evening as it deepens to 29.5 
inches. weak ridging of around 29.8 inches then moves over lake 
superior on wednesday ahead of a 29.6 inch low arriving over 
northern ontario thursday morning. this low brings a trough across 
the lake thursday before escaping to the east by friday morning, 
replaced by a 30.0 inch ridge.



lsz263-050900-
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 sun jan 4 2026

.late this afternoon...southeast winds 5 to 15 knots. snow
showers. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south by
midnight, then becoming southwest 5 to 15 knots late. snow
showers in the evening, then a slight chance of snow showers
after midnight. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.monday...northeast winds 5 to 15 knots veering southwest. waves
calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots by midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots. a slight chance of rain and
snow showers. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.friday...north winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$