fzus63 kmqt 281501
glfls 
expires:202512282100;;377932

open lake forecast for lake superior
national weather service marquette mi
1000 am est sun dec 28 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...

deepening low pressure over the plains early this morning lifts 
into the great lakes this afternoon. this low deepens to 28.9 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 on 
monday. a 29.7 inch trough dives southeast into the upper great 
lakes late tuesday. weak ridging of around 30.0 inches on wednesday 
will be followed up by additional 29.6-29.7inch shortwaves skirting 
the region the rest of the work week.



lsz162-282100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est sun dec 28 2025 /900 am cst sun dec 28 2025/

...gale warning in effect from 7 pm est /6 pm cst/ this evening
through monday evening...
...heavy freezing spray warning in effect from 10 pm est /9 pm
cst/ this evening through late monday night...

.rest of today...north winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. patchy fog late in the morning. a
chance of rain showers late in the morning, then snow showers,
possibly mixed with rain in the afternoon. waves calm to 2 feet
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...north gales to 45 knots. heavy freezing spray. snow
showers in the evening. a chance of snow showers after midnight.
waves building to 10 to 14 feet occasionally to 18 feet. 
.monday...north gales to 45 knots becoming northwest gales to
40 knots. a slight chance of snow showers in the morning. heavy
freezing spray. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.monday night...northwest gales to 35 knots diminishing to 15 to
25 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. snow showers. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. waves building to 2 to 4 feet. 
.wednesday...northwest winds 20 to 30 knots. waves 2 to 4 feet. 
.thursday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 281501
glfls 
expires:202512282100;;377933

open lake forecast for lake superior
national weather service marquette mi
1000 am est sun dec 28 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...

deepening low pressure over the plains early this morning lifts 
into the great lakes this afternoon. this low deepens to 28.9 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 on 
monday. a 29.7 inch trough dives southeast into the upper great 
lakes late tuesday. weak ridging of around 30.0 inches on wednesday 
will be followed up by additional 29.6-29.7inch shortwaves skirting 
the region the rest of the work week.



lsz263-282100-
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 dec 28 2025

...storm warning in effect from 7 pm est this evening through
monday evening...
...heavy freezing spray warning in effect from late tonight
through tuesday morning...

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

note, wave height forecasts are for ice free areas.

$$