fzus63 kmqt 290256
glfls 
expires:202512290900;;410763

open lake forecast for lake superior
national weather service marquette mi
956 pm 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...

low pressure over southern lake michigan will track northeast 
tonight, deepening to 28.8 inches as it crosses over lake huron into 
ontario. 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.



lsz162-290900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
956 pm est sun dec 28 2025 /856 pm cst sun dec 28 2025/

...gale warning in effect through monday evening...
...heavy freezing spray warning in effect through monday
evening...

.rest of tonight...north gales to 45 knots. heavy freezing spray.
a chance of snow. waves 8 to 11 feet occasionally to 14 feet
building to 10 to 14 feet occasionally to 18 feet. 
.monday...north gales to 40 knots becoming northwest gales to
35 knots. heavy freezing spray. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.monday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then becoming west 10 to 20 knots
late. 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 in the morning, then a chance of
snow showers in the afternoon. waves building to 2 to 4 feet. 
.tuesday night...northwest winds 20 to 30 knots. a slight chance
of snow showers. waves 2 to 4 feet. 
.wednesday...northwest winds 20 to 30 knots. waves 2 to 4 feet. 
.wednesday night...northwest winds 20 to 30 knots. waves 2 to
4 feet. 
.thursday...west gales to 35 knots. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.friday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 290256
glfls 
expires:202512290900;;410764

open lake forecast for lake superior
national weather service marquette mi
956 pm 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...

low pressure over southern lake michigan will track northeast 
tonight, deepening to 28.8 inches as it crosses over lake huron into 
ontario. 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.



lsz263-290900-
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-
956 pm est sun dec 28 2025

...storm warning in effect through monday evening...
...heavy freezing spray warning in effect from 1 am est monday
through monday evening...

.rest of tonight...north gales to 40 knots increasing to storm
force winds to 55 knots by midnight. heavy freezing spray. snow
late in the evening. a chance of snow after midnight. waves 10 to
14 feet occasionally to 18 feet building to 17 to 22 feet
occasionally to 28 feet. 
.monday...north storm force winds to 55 knots diminishing to
gales to 45 knots by late morning, then becoming northwest gales
to 40 knots by mid afternoon. a slight chance of snow 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 15 to
25 knots. freezing spray. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots. snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. heavy freezing spray. a slight
chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 6 to 9 feet occasionally
to 11 feet. 
.wednesday...northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. heavy freezing spray. waves subsiding
to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. heavy freezing spray. waves
building to 4 to 7 feet occasionally to 9 feet. 
.thursday...west gales to 40 knots. heavy freezing spray. waves
building to 5 to 9 feet occasionally to 11 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray. waves subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$