fzus63 kmqt 041500
glfls 
expires:202601042100;;776744

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

today, a 30.1 inch high continues to slide through lake superior. as 
it reaches the lower great lakes tonight, 29.6 inch low pressure 
develops over the high plains. by midday monday, the high will be 
over the east coast while another 29.6 inch low develops over the 
central plains. the low moves into lake michigan tuesday, reaching 
southern ontario tuesday evening. 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.



lsz162-042100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est sun jan 4 2026 /900 am cst sun jan 4 2026/

.rest of today...south winds 5 to 15 knots becoming southeast
10 to 20 knots by mid afternoon. a slight chance of snow showers
late in the morning, then snow showers in the afternoon. 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, then a slight chance of snow showers after midnight.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.monday night...south winds 5 to 15 knots veering southwest after
midnight. a slight chance of freezing rain after midnight. waves
calm to 2 feet. 
.tuesday...west winds 5 to 15 knots. a chance of freezing rain in
the morning. a chance of snow showers, possibly mixed with rain.
waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.thursday...west winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041500
glfls 
expires:202601042100;;776745

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

today, a 30.1 inch high continues to slide through lake superior. as 
it reaches the lower great lakes tonight, 29.6 inch low pressure 
develops over the high plains. by midday monday, the high will be 
over the east coast while another 29.6 inch low develops over the 
central plains. the low moves into lake michigan tuesday, reaching 
southern ontario tuesday evening. 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.



lsz263-042100-
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 am est sun jan 4 2026

.rest of today...northwest winds 5 to 15 knots backing south by
late morning, then backing southeast by mid afternoon. a slight
chance of snow showers late in the morning, then snow showers
likely in the afternoon. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest 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...north winds less than 10 knots backing southwest. waves
calm to 2 feet. 
.monday night...south winds less than 10 knots veering southwest
after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering west in the
afternoon. a chance of snow showers, possibly mixed with rain.
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. waves calm to 2 feet.
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$