fzus63 kmqt 260901
glfls 
expires:202512262100;;245434

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 26 2025

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...

low pressure of 29.6 inches moves east along the southern end of the 
great lakes basin today while extending a 29.8 inch trough north 
over the upper great lakes. 30.1 inch ridging builds across the 
region saturday before another low of 29.6 inches then lifts over 
lower michigan sunday while extending a 29.8 inch trough northward 
across the lake. by monday, a strong high pressure of at least 30.6 
inches will reside over the great plains as the low deepens to 29.0 
inches over quebec, yielding a tight pressure gradient across the 
great lakes.



lsz162-262100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est fri dec 26 2025 /300 am cst fri dec 26 2025/

.early this morning...south winds 5 to 15 knots. snow, possibly
mixed with freezing rain, sleet likely and rain. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.today...west winds 5 to 15 knots veering northwest. a slight
chance of snow in the morning. waves subsiding to calm to 2 feet.
.tonight...northwest winds 5 to 15 knots backing south by
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southeast 10 to
20 knots. a chance of rain showers. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering southwest
after midnight. a chance of rain showers. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. a chance of snow showers in the
morning. a chance of rain showers. snow showers likely in the
afternoon. waves building to 2 to 4 feet. 
.sunday night...north gales to 35 knots. freezing spray. snow
likely in the evening. a chance of snow after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.monday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray. a chance of snow. waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 1 to
3 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest 20 to
30 knots. snow showers likely. waves subsiding to calm to 2 feet,
then building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 260901
glfls 
expires:202512262100;;245435

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 26 2025

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...

low pressure of 29.6 inches moves east along the southern end of the 
great lakes basin today while extending a 29.8 inch trough north 
over the upper great lakes. 30.1 inch ridging builds across the 
region saturday before another low of 29.6 inches then lifts over 
lower michigan sunday while extending a 29.8 inch trough northward 
across the lake. by monday, a strong high pressure of at least 30.6 
inches will reside over the great plains as the low deepens to 29.0 
inches over quebec, yielding a tight pressure gradient across the 
great lakes.



lsz263-262100-
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 am est fri dec 26 2025

.early this morning...south winds 15 to 25 knots. snow, possibly
mixed with rain, freezing rain and sleet. waves 5 to 9 feet
occasionally to 11 feet. 
.today...south winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of snow, possibly mixed with rain, drizzle and
freezing drizzle in the morning. waves subsiding to 1 to 3 feet. 
.tonight...northwest winds less than 10 knots backing south by
midnight, then increasing to 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southeast 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet. 
.saturday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of rain showers. waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 to 20 knots becoming north 20 to
30 knots in the afternoon. a chance of rain and snow showers.
waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...north gales to 40 knots. freezing spray. snow
likely. waves building to 10 to 14 feet occasionally to 18 feet. 
.monday...north gales to 45 knots becoming northwest gales to
35 knots. heavy freezing spray. a chance of snow. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest gales to
35 knots. a chance of snow showers. heavy freezing spray. waves
building to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$