fzus63 kmqt 191501
glfls 
expires:202601192100;;161559

open lake forecast for lake superior
national weather service marquette mi
1000 am est mon jan 19 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 low of 29.6 inches just north of lake huron moves to quebec this 
afternoon while a high pressure of 30.6 inches is dropping south 
over the plains. this high builds weak ridging of 30.0 inches over 
much of lake superior today, which strengthens to 30.1 inches by 
tuesday morning as a very weak trough of 30.0 inches scoots through 
the lake. a 29.8 inch low then moves over lower michigan on 
wednesday ahead of a secondary 29.8 inch low moving into lake 
superior later in the day. as the lows phase and continue east 
wednesday night into thursday, a weak remnant trough of 30.0 inches 
extends over the lake. after that, a 31.0 inch high builds from the 
canadian prairies into the northern plains thursday night through 
friday. this high builds into the upper midwest friday night into 
saturday as it weakens to 30.7 inches.



lsz162-192100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est mon jan 19 2026 /900 am cst mon jan 19 2026/

...heavy freezing spray warning in effect through this evening...

.rest of today...northwest winds 20 to 30 knots. heavy freezing
spray. a chance of snow showers. waves 5 to 8 feet occasionally
to 10 feet subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. a chance of snow showers. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots. waves subsiding to 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. a chance of snow showers.
waves building to 1 to 3 feet. 
.wednesday night...northwest winds 15 to 25 knots. waves building
to 3 to 5 feet occasionally to 7 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 191501
glfls 
expires:202601192100;;161560

open lake forecast for lake superior
national weather service marquette mi
1000 am est mon jan 19 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 low of 29.6 inches just north of lake huron moves to quebec this 
afternoon while a high pressure of 30.6 inches is dropping south 
over the plains. this high builds weak ridging of 30.0 inches over 
much of lake superior today, which strengthens to 30.1 inches by 
tuesday morning as a very weak trough of 30.0 inches scoots through 
the lake. a 29.8 inch low then moves over lower michigan on 
wednesday ahead of a secondary 29.8 inch low moving into lake 
superior later in the day. as the lows phase and continue east 
wednesday night into thursday, a weak remnant trough of 30.0 inches 
extends over the lake. after that, a 31.0 inch high builds from the 
canadian prairies into the northern plains thursday night through 
friday. this high builds into the upper midwest friday night into 
saturday as it weakens to 30.7 inches.



lsz263-192100-
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 mon jan 19 2026

...heavy freezing spray warning in effect through tuesday
evening...

.rest of today...northwest winds 20 to 30 knots diminishing to
15 to 25 knots by late morning, then increasing to 20 to 30 knots
by mid afternoon. heavy freezing spray. snow showers likely late
in the morning. a chance of snow showers in the afternoon. waves
7 to 10 feet occasionally to 13 feet subsiding to 4 to 7 feet
occasionally to 9 feet, then building to 6 to 9 feet occasionally
to 11 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. heavy freezing spray. a chance of snow
showers. waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 15 to 25 knots. heavy freezing spray. a
slight chance of snow showers. waves 4 to 7 feet occasionally to
9 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a slight chance of snow showers after
midnight. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots. a chance of snow showers.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.wednesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. heavy freezing spray. waves
building to 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 20 to 30 knots. heavy freezing spray.
waves building to 4 to 8 feet occasionally to 10 feet. 
.friday...northwest winds 15 to 25 knots. waves subsiding to 2 to
4 feet. 

note, wave height forecasts are for ice free areas.

$$