fzus63 kmqt 280201
glfls 
expires:202606280800;;024894

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat jun 27 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, lake superior is between 29.4 inch low pressure near the 
colorado/nebraska line and 30.1 inch high pressure over eastern 
hudson bay. through sunday afternoon, the low will wrap to the 
northeast then northwest to southern saskatchewan, deepening to 20.3 
inches while the high remains stationary and holds strength. by 
monday morning, the high will shift southeast to be 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 monday 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.




lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sat jun 27 2026 /900 pm cdt sat jun 27 2026/

.rest of tonight...northeast winds 5 to 15 knots. a slight chance
of showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots increasing to 15 to 25 knots
late. a slight chance of showers by mid afternoon. waves building
to 2 to 4 feet. 
.sunday night...east winds 10 to 20 knots backing northeast after
midnight, then veering east late. a chance of showers and
thunderstorms. waves subsiding to 1 to 3 feet. 
.monday...northeast winds 10 to 20 knots. a chance of showers and
a slight chance of thunderstorms. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.monday night...northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. showers likely and a chance of
thunderstorms. waves building to 2 to 4 feet, then subsiding to
calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots. a chance of showers
and thunderstorms by mid afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 5 to
15 knots. a chance of showers and thunderstorms. waves calm to
2 feet. 
.thursday...east winds 5 to 15 knots backing north. a chance of
showers and thunderstorms. waves calm to 2 feet. 

$$

fzus63 kmqt 280201
glfls 
expires:202606280800;;024895

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat jun 27 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, lake superior is between 29.4 inch low pressure near the 
colorado/nebraska line and 30.1 inch high pressure over eastern 
hudson bay. through sunday afternoon, the low will wrap to the 
northeast then northwest to southern saskatchewan, deepening to 20.3 
inches while the high remains stationary and holds strength. by 
monday morning, the high will shift southeast to be 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 monday 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.




lsz263-280800-
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 pm edt sat jun 27 2026

.rest of tonight...east winds 5 to 15 knots veering southeast
after midnight. a slight chance of showers. waves calm to 2 feet.
.sunday...east winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. a slight chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.sunday night...east winds 10 to 20 knots veering southeast after
midnight, then becoming east 5 to 15 knots late. a chance of
showers and thunderstorms. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of showers and a slight chance of
thunderstorms. waves 1 to 3 feet. 
.monday night...east winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. a chance of showers through
midnight. a slight chance of thunderstorms. showers likely after
midnight. waves building to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots. 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 chance of
showers. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 5 to
15 knots. a chance of showers and thunderstorms. waves subsiding
to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering west. a chance
of showers. waves calm to 2 feet. 

$$