fzus63 kmqt 050900
glfls 
expires:202603052100;;657513

open lake forecast for lake superior
national weather service marquette mi
400 am est thu mar 5 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 30.6 inch high over far northern ontario builds to 30.7 inches 
over northwestern quebec this morning. as the high shifts over 
central quebec today, a 29.4 inch low develops over colorado. this 
low will weaken to 29.6 inches as it reaches wisconsin by friday 
night. saturday, the low quickly jumps northeast to southwestern 
quebec, deepening to 29.3 inches. a 30.2 inch high over the central 
to southern plains will project a weak 29.8 inch ridge over the lake 
saturday night before a 29.1 inch low cuts across northern ontario. 
the low pushes into quebec monday quickly followed by a 29.2 inch 
clipper low. by tuesday morning, the lake will be between high of 
30.3 inches over northern ontario and 29.6 inch low pressure over 
the upper mississippi river valley.



lsz162-052100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est thu mar 5 2026 /300 am cst thu mar 5 2026/

...dense fog advisory in effect until 1 pm est /noon cst/ this
afternoon...

.early this morning...northeast winds 20 to 30 knots. patchy
dense fog. a slight chance of freezing rain, freezing drizzle and
snow showers. waves 4 to 7 feet occasionally to 9 feet. 
.today...northeast winds 15 to 25 knots. a slight chance of
freezing drizzle and snow showers in the morning. areas of dense
freezing fog in the morning. areas of dense fog. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 10 to 20 knots diminishing to 5 to 15 knots
by midnight. patchy fog. a slight chance of drizzle and freezing
drizzle after midnight. waves subsiding to calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast by mid
afternoon. patchy fog in the morning. a chance of drizzle in the
morning. rain showers likely. waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots increasing to 10 to
20 knots after midnight. rain showers likely. a slight chance of
snow showers after midnight. waves calm to 2 feet. 
.saturday...northwest winds 15 to 25 knots backing west in the
afternoon. waves building to 1 to 3 feet. 
.saturday night...southwest winds 20 to 30 knots increasing to
gales to 40 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...southwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 2 to 4 feet. 
.monday...west winds 10 to 20 knots becoming northeast 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 

$$

fzus63 kmqt 050900
glfls 
expires:202603052100;;657514

open lake forecast for lake superior
national weather service marquette mi
400 am est thu mar 5 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 30.6 inch high over far northern ontario builds to 30.7 inches 
over northwestern quebec this morning. as the high shifts over 
central quebec today, a 29.4 inch low develops over colorado. this 
low will weaken to 29.6 inches as it reaches wisconsin by friday 
night. saturday, the low quickly jumps northeast to southwestern 
quebec, deepening to 29.3 inches. a 30.2 inch high over the central 
to southern plains will project a weak 29.8 inch ridge over the lake 
saturday night before a 29.1 inch low cuts across northern ontario. 
the low pushes into quebec monday quickly followed by a 29.2 inch 
clipper low. by tuesday morning, the lake will be between high of 
30.3 inches over northern ontario and 29.6 inch low pressure over 
the upper mississippi river valley.



lsz263-052100-
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 thu mar 5 2026

...dense fog advisory in effect until 1 pm est this afternoon...

.early this morning...northeast winds 20 to 30 knots. patchy
dense fog. a slight chance of freezing rain, freezing drizzle and
snow showers. waves 5 to 8 feet occasionally to 10 feet. 
.today...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. areas of dense freezing fog in the
morning. patchy dense fog. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...east winds 10 to 20 knots becoming southeast 5 to
15 knots by midnight. patchy fog. waves subsiding to 2 to 4 feet.
.friday...southeast winds 5 to 15 knots backing east by mid
afternoon. patchy fog in the morning. a chance of rain showers
and a slight chance of drizzle in the morning, then rain showers
likely in the afternoon. waves subsiding to 1 to 3 feet. 
.friday night...north winds 5 to 15 knots increasing to 15 to
25 knots after midnight. a chance of rain showers in the evening,
then rain showers likely, possibly mixed with snow showers after
midnight. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 15 to 25 knots backing west in the
afternoon. a chance of snow showers, possibly mixed with rain in
the morning. waves building to 1 to 3 feet. 
.saturday night...southwest winds 20 to 30 knots increasing to
gales to 40 knots after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday...southwest gales to 40 knots diminishing to 20 to
30 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday...west winds 15 to 25 knots veering northeast. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 

$$