fzus63 kmqt 182101
glfls 
expires:202601190900;;119283

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun jan 18 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 deepening low of around 29.6 inches over lake superior will drop 
south into the eastern u.p by monday morning. the low then moves to 
quebec on monday while a high pressure of 30.6 inches drops south 
over the plains. this builds weak ridging of 30.0 inches over much 
of lake superior on monday which strengthens to 30.1 inches by 
tuesday morning. a low of at least 29.8 inches then moves over lake 
superior on wednesday. as the low continues east on thursday, a weak 
remnant trough of 30.0 inches extends over the lake. after that, a 
30.8 inch high builds from the canadian prairies into the northern 
plains thursday night through friday. this high will build into the 
upper midwest friday night into saturday.



lsz162-190900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm est sun jan 18 2026 /301 pm cst sun jan 18 2026/

...heavy freezing spray warning in effect through monday
evening...
...gale warning in effect from 10 pm est /9 pm cst/ this evening
through monday morning...

.late this afternoon...northwest winds 15 to 25 knots. snow
showers likely. waves 2 to 4 feet. 
.tonight...north winds 20 to 30 knots increasing to gales to
40 knots by midnight, then becoming northwest gales to 35 knots
late. heavy freezing spray. a chance of snow showers. waves
building to 6 to 9 feet occasionally to 11 feet. 
.monday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray in the morning. a slight chance of
snow showers in the morning. snow showers likely in the
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet.
.monday night...northwest winds 15 to 25 knots backing west late.
waves subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots. waves 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. a chance of snow showers. waves
building to 2 to 4 feet. 
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
calm to 2 feet. 
.friday...northwest winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 182101
glfls 
expires:202601190900;;119284

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun jan 18 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 deepening low of around 29.6 inches over lake superior will drop 
south into the eastern u.p by monday morning. the low then moves to 
quebec on monday while a high pressure of 30.6 inches drops south 
over the plains. this builds weak ridging of 30.0 inches over much 
of lake superior on monday which strengthens to 30.1 inches by 
tuesday morning. a low of at least 29.8 inches then moves over lake 
superior on wednesday. as the low continues east on thursday, a weak 
remnant trough of 30.0 inches extends over the lake. after that, a 
30.8 inch high builds from the canadian prairies into the northern 
plains thursday night through friday. this high will build into the 
upper midwest friday night into saturday.



lsz263-190900-
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-
401 pm est sun jan 18 2026

...heavy freezing spray warning in effect through tuesday
evening...
...gale warning in effect from 10 pm est this evening through
monday morning...

.late this afternoon...west winds 15 to 25 knots. snow showers.
waves 3 to 5 feet occasionally to 7 feet. 
.tonight...north gales to 35 knots. heavy freezing spray. snow
showers. waves building to 8 to 11 feet occasionally to 14 feet. 
.monday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray. snow showers likely. waves
subsiding to 5 to 8 feet occasionally to 10 feet. 
.monday night...northwest winds 15 to 25 knots. a slight chance
of snow showers in the evening. heavy freezing spray. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots. a slight chance of snow
showers. waves 3 to 6 feet occasionally to 8 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. a chance of snow showers. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. heavy freezing spray. waves
building to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$