fzus63 kmqt 040900
glfls 
expires:202603042100;;599568

open lake forecast for lake superior
national weather service marquette mi
400 am est wed mar 4 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 30.1 inch trough will be over the lake today. meanwhile, a 30.6 
inch high will move from northern manitoba wednesday to quebec 
thursday morning, building to 30.7 inches late. the strong high will 
help keep a 29.9 inch low moving up from the southern plains to the 
south of the lower great lakes wednesday night, weakening to 30.1 
inches by thursday night. friday, a low pressure ejects out of the 
plains, reaching lake superior saturday morning at least at 29.7 
inches. behind the low, a 29.9 inch ridge builds over the lake on 
saturday night before a 29.1 inch low moves through northern ontario 
on sunday with troughing of 29.5 inches lingering over the lake 
through monday morning.



lsz162-042100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est wed mar 4 2026 /300 am cst wed mar 4 2026/

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 5 to 15 knots backing south by late
morning, then becoming east 10 to 20 knots by mid afternoon. a
slight chance of drizzle and freezing drizzle in the morning.
waves calm to 2 feet. 
.tonight...northeast winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then diminishing to 15 to 25 knots late. a
slight chance of drizzle and freezing drizzle after midnight.
waves calm to 2 feet. 
.thursday...east winds 15 to 25 knots. a slight chance of
freezing drizzle in the morning. waves calm to 2 feet. 
.thursday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast in the
afternoon. a chance of rain showers in the morning, then rain
showers likely in the afternoon. waves calm to 2 feet. 
.friday night...north winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. a chance of rain showers. a chance
of snow showers after midnight. waves calm to 2 feet. 
.saturday...west winds 20 to 30 knots becoming southwest gales to
35 knots. waves calm to 2 feet. 
.sunday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 040900
glfls 
expires:202603042100;;599569

open lake forecast for lake superior
national weather service marquette mi
400 am est wed mar 4 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 30.1 inch trough will be over the lake today. meanwhile, a 30.6 
inch high will move from northern manitoba wednesday to quebec 
thursday morning, building to 30.7 inches late. the strong high will 
help keep a 29.9 inch low moving up from the southern plains to the 
south of the lower great lakes wednesday night, weakening to 30.1 
inches by thursday night. friday, a low pressure ejects out of the 
plains, reaching lake superior saturday morning at least at 29.7 
inches. behind the low, a 29.9 inch ridge builds over the lake on 
saturday night before a 29.1 inch low moves through northern ontario 
on sunday with troughing of 29.5 inches lingering over the lake 
through monday morning.



lsz263-042100-
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 wed mar 4 2026

.early this morning...southwest winds less than 10 knots. patchy
fog. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots backing south by late
morning, then becoming northeast 10 to 20 knots by mid afternoon.
waves calm to 2 feet. 
.tonight...northeast winds 15 to 25 knots increasing to 20 to
30 knots by midnight. patchy fog. a slight chance of drizzle and
freezing drizzle. waves building to 5 to 8 feet occasionally to
10 feet. 
.thursday...east winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of freezing drizzle
and snow showers in the morning. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...east winds 10 to 20 knots veering southeast
after midnight. waves subsiding to 2 to 4 feet. 
.friday...southeast winds 5 to 15 knots. a chance of rain showers
in the morning, then rain showers likely in the afternoon. waves
subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots increasing to 15 to
25 knots after midnight. a chance of rain showers. a chance of
snow showers after midnight. waves calm to 2 feet. 
.saturday...west winds 20 to 30 knots becoming southwest gales to
35 knots. waves building to 1 to 3 feet. 
.sunday...west gales to 35 knots becoming southwest 15 to
25 knots. waves subsiding to calm to 2 feet. 

$$