fzus63 kmqt 052101
glfls 
expires:202603060900;;687260

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 30.7 inch high over central quebec this afternoon moves east 
tonight, allowing 30.2 inch high pressure over lake superior this 
afternoon to fall to 30.0 inches by friday morning ahead of a 29.5 
inch low developing over kansas and nebraska. this low tracks 
northeast to upper michigan and lake superior at 29.4 inches by 
saturday morning. weak 29.8 ridging builds over the lake on saturday 
evening as the low quickly departs into quebec. 29.5 inch troughing 
returns to the lake on sunday as a 29.1 inch low tracks across 
northern ontario. this will be closely followed by a 29.3 inch 
clipper low crossing the lake monday morning. by tuesday morning, 
the lake will be between 30.3 inch high pressure over northern 
ontario and 29.6 inch low pressure over the upper mississippi river 
valley.



lsz162-060900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est thu mar 5 2026 /300 pm cst thu mar 5 2026/

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

$$

fzus63 kmqt 052101
glfls 
expires:202603060900;;687261

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 30.7 inch high over central quebec this afternoon moves east 
tonight, allowing 30.2 inch high pressure over lake superior this 
afternoon to fall to 30.0 inches by friday morning ahead of a 29.5 
inch low developing over kansas and nebraska. this low tracks 
northeast to upper michigan and lake superior at 29.4 inches by 
saturday morning. weak 29.8 ridging builds over the lake on saturday 
evening as the low quickly departs into quebec. 29.5 inch troughing 
returns to the lake on sunday as a 29.1 inch low tracks across 
northern ontario. this will be closely followed by a 29.3 inch 
clipper low crossing the lake monday morning. by tuesday morning, 
the lake will be between 30.3 inch high pressure over northern 
ontario and 29.6 inch low pressure over the upper mississippi river 
valley.



lsz263-060900-
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 pm est thu mar 5 2026

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

$$