fzus63 kmqt 290801
glfls 
expires:202606292000;;096378

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon jun 29 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 29.4 low will track north, and then northwest, from the central 
plains to southern saskatchewan through tonight, deepening to 29.2 
inches. meanwhile a 30.1 inch high over the hudson bay will weaken 
and 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 tonight into tomorrow morning as high 
pressure shifts off the east coast, still at 30.1 inches. tomorrow, 
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 into the weekend.




lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt mon jun 29 2026 /300 am cdt mon jun 29 2026/

.early this morning...east winds 10 to 20 knots. showers and a
chance of thunderstorms. waves 1 to 3 feet. 
.today...northeast winds 10 to 20 knots increasing to 15 to
25 knots late. patchy fog. a chance of showers and a slight
chance of thunderstorms. waves building to 2 to 4 feet. 
.tonight...northeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. patchy fog. a chance of showers and thunderstorms. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. areas of dense fog through early afternoon. a
slight chance of showers and thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tuesday night...southwest winds 10 to 20 knots. a slight chance
of showers through midnight. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. a chance of showers
and thunderstorms. waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots backing southwest
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves
subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202606292000;;096379

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon jun 29 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 29.4 low will track north, and then northwest, from the central 
plains to southern saskatchewan through tonight, deepening to 29.2 
inches. meanwhile a 30.1 inch high over the hudson bay will weaken 
and 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 tonight into tomorrow morning as high 
pressure shifts off the east coast, still at 30.1 inches. tomorrow, 
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 into the weekend.




lsz263-292000-
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 mon jun 29 2026

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

$$