fzus63 kmqt 270901
glfls 
expires:202512272100;;303075

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 27 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...

30.0 inch ridge builds across the lake tonight ahead of a 29.6 inch 
low lifting northeast into the great lakes sunday. this low deepens 
to 28.8 inches as it lifts to near the straits of mackinac by monday 
morning. meanwhile, a strong high pressure of at least 30.6 inches 
will spread across the great plains as the low lifts into quebec. 
30.1 inch ridging builds overhead by tuesday morning. a 29.8 inch 
trough dives southeast into the upper great lakes late tuesday, 
remaining overhead until at least wednesday afternoon.



lsz162-272100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat dec 27 2025 /300 am cst sat dec 27 2025/

...gale watch in effect from sunday evening through monday
evening...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 270901
glfls 
expires:202512272100;;303076

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 27 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...

30.0 inch ridge builds across the lake tonight ahead of a 29.6 inch 
low lifting northeast into the great lakes sunday. this low deepens 
to 28.8 inches as it lifts to near the straits of mackinac by monday 
morning. meanwhile, a strong high pressure of at least 30.6 inches 
will spread across the great plains as the low lifts into quebec. 
30.1 inch ridging builds overhead by tuesday morning. a 29.8 inch 
trough dives southeast into the upper great lakes late tuesday, 
remaining overhead until at least wednesday afternoon.



lsz263-272100-
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 sat dec 27 2025

...gale watch in effect from sunday evening through monday
evening...

.early this morning...south winds 5 to 15 knots. flurries. waves
calm to 2 feet. 
.today...southeast winds 5 to 15 knots becoming south 10 to
20 knots. flurries in the morning. a chance of rain showers.
waves building to 1 to 3 feet. 
.tonight...south winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. a chance of rain showers. waves building to
2 to 4 feet, then subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots becoming north 10 to
20 knots by late morning, then increasing to 30 knots with a few
gale force gusts to 35 knots possible by mid afternoon. a chance
of rain showers, possibly mixed with snow in the morning, then
snow, possibly mixed with rain in the afternoon. waves building
to 3 to 6 feet occasionally to 8 feet. 
.sunday night...north gales to 45 knots increasing to storm force
winds to 55 knots after midnight. heavy freezing spray. a slight
chance of rain in the evening. snow. waves building to 17 to
22 feet occasionally to 28 feet. 
.monday...north storm force winds to 55 knots diminishing to
gales to 45 knots in the afternoon. heavy freezing spray. a
chance of snow. waves subsiding to 10 to 14 feet occasionally to
18 feet. 
.monday night...northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. heavy freezing spray. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest gales to
35 knots. a chance of snow showers. freezing spray. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.wednesday...northwest gales to 35 knots. heavy freezing spray.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 6 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$