fzus63 kmqt 101401
glfls 
expires:202610102000;;857392

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sat oct 10 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...

lake superior is currently between a 30.4 inch high over new york 
state and a 29.4 inch low over southern saskatchewan, resulting in a 
tight pressure gradient and elevated winds today. a gale warning is 
in effect later today for portions of eastern lake superior. the low 
slowly weakens to 29.6 inches while tracking northeastward toward 
ontario today into tonight. meanwhile, 29.7 inch hurricane isaias 
will move north through alabama, eventually helping to kick the high 
eastward off the atlantic coast by early sunday. sunday morning, the 
canada low will split into two weaker 29.7 inch lows, one settling 
over the central plains and one moving from northern minnesota to 
northern ontario. this will create weak 29.8 inch troughing over 
lake superior for sunday, deepening to 29.7 inches by monday 
evening. this is followed by pressure rises beginning late tuesday, 
peaking at 30.3 inch high pressure settling over the upper great 
lakes by thursday.




lsz162-102000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sat oct 10 2026 /901 am cdt sat oct 10 2026/

.rest of today...southeast winds 10 to 20 knots becoming east
15 to 25 knots in the afternoon, then becoming south 20 to
30 knots late. waves 1 to 3 feet. 
.tonight...south winds to 30 knots with a few gale force gusts to
35 knots possible veering southwest after midnight, then
diminishing to 15 to 25 knots late. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. waves
subsiding to calm to 2 feet. 
.sunday night...northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a slight chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.monday...northeast gales to 35 knots. a chance of showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.monday night...northeast winds 20 to 30 knots. showers likely
through midnight. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.tuesday...northeast winds 10 to 20 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming east 10 to
20 knots. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 101401
glfls 
expires:202610102000;;857393

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sat oct 10 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...

lake superior is currently between a 30.4 inch high over new york 
state and a 29.4 inch low over southern saskatchewan, resulting in a 
tight pressure gradient and elevated winds today. a gale warning is 
in effect later today for portions of eastern lake superior. the low 
slowly weakens to 29.6 inches while tracking northeastward toward 
ontario today into tonight. meanwhile, 29.7 inch hurricane isaias 
will move north through alabama, eventually helping to kick the high 
eastward off the atlantic coast by early sunday. sunday morning, the 
canada low will split into two weaker 29.7 inch lows, one settling 
over the central plains and one moving from northern minnesota to 
northern ontario. this will create weak 29.8 inch troughing over 
lake superior for sunday, deepening to 29.7 inches by monday 
evening. this is followed by pressure rises beginning late tuesday, 
peaking at 30.3 inch high pressure settling over the upper great 
lakes by thursday.




lsz263-102000-
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-
1001 am edt sat oct 10 2026

.rest of today...southeast winds 15 to 25 knots veering south in
the afternoon, then increasing to 20 to 30 knots late. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...south winds 20 to 30 knots veering southwest after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...southwest winds 10 to 20 knots becoming west 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.sunday night...northeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. a chance of showers after
midnight. waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...northeast gales to 35 knots. a chance of showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.monday night...northeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. showers likely through midnight.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northeast winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming east 10 to
20 knots. waves building to 1 to 3 feet. 

$$