fzus63 kmqt 280801
glfls 
expires:202606282000;;040005

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun jun 28 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... 

through this afternoon, a 29.4 low will wrap to the northeast then 
northwest to southern saskatchewan, deepening to 20.3 inches while a 
30.1 inch high remains stationary and holds strength over the hudson 
bay. by tomorrow morning, the high will shift southeast to the east 
of lake erie as the saskatchewan low regresses southwest at 29.5 
inches to montana while another low at 29.4 inches moves from 
colorado to the northern plains. the 2nd low moves to southern 
manitoba tomorrow night as high pressure shifts off the east coast, 
still at 30.1 inches. tuesday, the low shifts north to lake winnipeg 
and deepens to 29.2 inches. the low then weakens to 29.4 inches as 
it crosses northern ontario by midday wednesday. as the low shifts 
east through thursday, weak high pressure around 30.0 inches expands 
over much of the eastern conus.




lsz162-282000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun jun 28 2026 /300 am cdt sun jun 28 2026/

.early this morning...east winds 10 to 20 knots. waves calm to
2 feet. 
.today...east winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. a slight chance of showers and thunderstorms by
mid afternoon. waves building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. showers likely through midnight. a
chance of thunderstorms. a chance of showers after midnight.
waves subsiding to 1 to 3 feet. 
.monday...northeast winds 10 to 20 knots increasing to 15 to
25 knots late. a chance of showers. a chance of thunderstorms by
mid afternoon. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 
.monday night...northeast winds 15 to 25 knots becoming east 5 to
15 knots after midnight. showers likely through midnight. a
chance of thunderstorms. a chance of showers after midnight.
waves subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.wednesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing northeast. a chance
of showers and thunderstorms. waves calm to 2 feet. 

$$

fzus63 kmqt 280801
glfls 
expires:202606282000;;040006

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun jun 28 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... 

through this afternoon, a 29.4 low will wrap to the northeast then 
northwest to southern saskatchewan, deepening to 20.3 inches while a 
30.1 inch high remains stationary and holds strength over the hudson 
bay. by tomorrow morning, the high will shift southeast to the east 
of lake erie as the saskatchewan low regresses southwest at 29.5 
inches to montana while another low at 29.4 inches moves from 
colorado to the northern plains. the 2nd low moves to southern 
manitoba tomorrow night as high pressure shifts off the east coast, 
still at 30.1 inches. tuesday, the low shifts north to lake winnipeg 
and deepens to 29.2 inches. the low then weakens to 29.4 inches as 
it crosses northern ontario by midday wednesday. as the low shifts 
east through thursday, weak high pressure around 30.0 inches expands 
over much of the eastern conus.




lsz263-282000-
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 edt sun jun 28 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon. waves building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots becoming southeast 10 to
20 knots after midnight, then becoming east 5 to 15 knots late. a
chance of showers and thunderstorms. waves subsiding to 1 to
3 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots
late. a chance of showers. a slight chance of thunderstorms by
mid afternoon. waves building to 2 to 4 feet. 
.monday night...east winds 15 to 25 knots becoming south 10 to
20 knots after midnight. showers likely and a chance of
thunderstorms. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.tuesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...southwest winds 10 to 20 knots. a chance of
showers. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots. a chance of showers.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing northeast. a chance
of showers. waves calm to 2 feet. 

$$