fzus63 kmqt 200301
glfls 
expires:202602200900;;934316

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu feb 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 29.2 inch low will lift northeast into the great lakes by friday 
morning. as it moves through northern lower michigan and lake huron 
through the day, it will weaken to 29.5 inches. the low will 
continue to weaken saturday, devolving into bent back toughing of 
30.2 inches by sunday morning. troughing continues to weaken sunday 
as a 31.0 inch high moves across manitoba. this high will weaken to 
30.5 inches as it moves through northern ontario monday. behind the 
ridge monday night and tuesday, a deepening clipper of at least 29.8 
inches moves into the northern plains, reaching lake superior by 
tuesday night.



lsz162-200900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est thu feb 19 2026 /900 pm cst thu feb 19 2026/

.rest of tonight...north winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of snow. waves 2 to 4 feet
subsiding to calm to 2 feet. 
.friday...north winds 10 to 20 knots increasing to 15 to 25 knots
by late morning, then diminishing to 10 to 20 knots by mid
afternoon. a chance of snow. waves building to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots. a chance of snow.
waves subsiding to calm to 2 feet. 
.saturday...north winds 10 to 20 knots. a chance of snow showers.
waves calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of snow showers.
waves calm to 2 feet. 
.sunday...north winds 15 to 25 knots. waves building to 1 to
3 feet. 
.sunday night...north winds 15 to 25 knots. waves building to
2 to 4 feet. 
.monday...north winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.tuesday...south winds 10 to 20 knots veering west. a chance of
snow showers. waves subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200301
glfls 
expires:202602200900;;934317

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu feb 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 29.2 inch low will lift northeast into the great lakes by friday 
morning. as it moves through northern lower michigan and lake huron 
through the day, it will weaken to 29.5 inches. the low will 
continue to weaken saturday, devolving into bent back toughing of 
30.2 inches by sunday morning. troughing continues to weaken sunday 
as a 31.0 inch high moves across manitoba. this high will weaken to 
30.5 inches as it moves through northern ontario monday. behind the 
ridge monday night and tuesday, a deepening clipper of at least 29.8 
inches moves into the northern plains, reaching lake superior by 
tuesday night.



lsz263-200900-
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 pm est thu feb 19 2026

.rest of tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then increasing to 10 to 20 knots late. a
chance of snow. waves 3 to 5 feet occasionally to 7 feet
subsiding to 1 to 3 feet. 
.friday...north winds 15 to 25 knots. snow likely. waves building
to 4 to 8 feet occasionally to 10 feet. 
.friday night...north winds 10 to 20 knots. a chance of snow.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...north winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.saturday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a slight chance of snow showers. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.sunday...north winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday night...north winds 20 to 30 knots. waves building to
5 to 9 feet occasionally to 11 feet. 
.monday...north winds 15 to 25 knots veering southeast. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots. a chance of snow showers.
waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$