fzus63 kmqt 041501
glfls 
expires:202602042100;;076934

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed feb 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...

high pressure currently centered over southeast mn builds to to 30.5 
inches by mid morning, maintaining 30.3-30.4in ridging over the 
lake. meanwhile, a 29.7 inch low will move into northern manitoba by 
this afternoon. this will bring a 29.8 inch trough over lake 
superior by thursday afternoon as the low moves into far northern 
ontario at 29.5 inches. the trough will deepen to 29.6 inches over 
eastern lake superior friday morning as low pressure over james bay 
deepens to 29.4 inches. the trough pushes east friday night with a 
30.4 inch high moving over the lake on saturday. the high will shift 
east on sunday in advance of another weak trough moving into the 
great lakes - but exact strength and  timing of this next feature 
remain uncertain.



lsz162-042100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed feb 4 2026 /900 am cst wed feb 4 2026/

.rest of today...west winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late. a
slight chance of snow showers in the evening, then snow showers
likely after midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 10 to 20 knots veering west. waves
subsiding to calm to 2 feet. 
.thursday night...west winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. a chance of rain showers in the
evening. a chance of snow showers. waves building to 1 to 3 feet.
.friday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202602042100;;076935

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed feb 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...

high pressure currently centered over southeast mn builds to to 30.5 
inches by mid morning, maintaining 30.3-30.4in ridging over the 
lake. meanwhile, a 29.7 inch low will move into northern manitoba by 
this afternoon. this will bring a 29.8 inch trough over lake 
superior by thursday afternoon as the low moves into far northern 
ontario at 29.5 inches. the trough will deepen to 29.6 inches over 
eastern lake superior friday morning as low pressure over james bay 
deepens to 29.4 inches. the trough pushes east friday night with a 
30.4 inch high moving over the lake on saturday. the high will shift 
east on sunday in advance of another weak trough moving into the 
great lakes - but exact strength and  timing of this next feature 
remain uncertain.



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-
1000 am est wed feb 4 2026

.rest of today...northwest winds 5 to 15 knots backing west by
mid afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots backing southwest by
midnight, then increasing to 15 to 25 knots late. snow showers
likely after midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots veering west by late
morning, then diminishing to 10 to 20 knots by mid afternoon. a
slight chance of snow showers in the morning. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.thursday night...west winds 10 to 20 knots becoming northwest
20 to 30 knots after midnight. a chance of rain showers in the
evening. a chance of snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
in the afternoon. heavy freezing spray in the morning. a slight
chance of snow showers in the morning. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$