fzus63 kmqt 050636
glfls 
expires:202603051445;;652452

open lake forecast for lake superior
national weather service marquette mi
136 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...

tonight through thursday morning, a 30.6 inch high over far northern 
ontario will build to 30.7 inches over northwestern quebec. as the 
high shifts over central quebec thursday, a 29.4 inch low will 
develop over colorado. this low will weaken to 29.6 inches as it 
reaches wisconsin by friday night. saturday, the low quickly jumps 
northeast to southwest 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. by 
tuesday morning, the lake will be between high pressure of 30.3 
inches over northern ontario and 29.6 inch low pressure over the 
upper mississippi river valley.



lsz162-051445-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
136 am est thu mar 5 2026 /1236 am cst thu mar 5 2026/

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

.rest of tonight...northeast winds 20 to 30 knots. areas of dense
freezing fog. a slight chance of freezing rain, freezing drizzle 
and snow showers. waves 4 to 8 feet occasionally to 10 feet. 
.thursday...northeast winds 15 to 25 knots. patchy fog in the
morning. a slight chance of freezing drizzle in the morning.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday night...northeast winds 10 to 20 knots becoming east
5 to 15 knots by midnight. waves subsiding to 1 to 3 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 subsiding to calm to
2 feet. 
.friday night...north winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a slight chance of thunderstorms in the
evening. a chance of rain showers. a 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 2 to 4 feet. 
.saturday night...southwest gales to 40 knots. waves building to
6 to 10 feet occasionally to 13 feet. 
.sunday...southwest gales to 35 knots diminishing to 15 to
25 knots. waves subsiding to 2 to 4 feet. 
.monday...west winds 15 to 25 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 

$$

fzus63 kmqt 050636
glfls 
expires:202603051445;;652453

open lake forecast for lake superior
national weather service marquette mi
136 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...

tonight through thursday morning, a 30.6 inch high over far northern 
ontario will build to 30.7 inches over northwestern quebec. as the 
high shifts over central quebec thursday, a 29.4 inch low will 
develop over colorado. this low will weaken to 29.6 inches as it 
reaches wisconsin by friday night. saturday, the low quickly jumps 
northeast to southwest 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. by 
tuesday morning, the lake will be between high pressure of 30.3 
inches over northern ontario and 29.6 inch low pressure over the 
upper mississippi river valley.



lsz263-051445-
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-
136 am est thu mar 5 2026

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

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

$$