fzus63 kmqt 150801
glfls 
expires:202610152000;;127081

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu oct 15 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 30.2 inch high pressure centered over central ontario continues to 
moves east into quebec by this afternoon. meanwhile, a 29.9 inch low 
is moving into manitoba, and another 29.9 inch low is developing 
over the southern plains. this afternoon, the lows begin to converge 
over the upper midwest, consolidating into a 29.8 inch low near 
chicago this evening and moving northeast into the lp tonight. in 
its wake, a 30.9 inch high builds over wyoming, weakening to 30.6 
inches friday as it expands over the plains while the low deepens to 
29.5 inches and heads towards new england. the high slides south of 
the great lakes at 30.4 inches by saturday night as a 29.4 inch 
alberta clipper moves into saskatchewan. sunday, the high builds 
back to 30.5 inches over the delmarva peninsula as the clipper moves 
into manitoba. ridging recovers over the great lakes monday.




lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu oct 15 2026 /301 am cdt thu oct 15 2026/

...gale warning in effect from late tonight through friday
afternoon...

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 5 to 15 knots veering southwest late. a
chance of showers through early afternoon, then showers by mid
afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming northwest 15 to
25 knots after midnight, then becoming north gales to 40 knots
late. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
late. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday night...northwest winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.saturday...southwest gales to 35 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.saturday night...southwest gales to 40 knots. waves building to
8 to 11 feet occasionally to 14 feet. 
.sunday...southwest gales to 40 knots becoming west 20 to
30 knots. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202610152000;;127082

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu oct 15 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 30.2 inch high pressure centered over central ontario continues to 
moves east into quebec by this afternoon. meanwhile, a 29.9 inch low 
is moving into manitoba, and another 29.9 inch low is developing 
over the southern plains. this afternoon, the lows begin to converge 
over the upper midwest, consolidating into a 29.8 inch low near 
chicago this evening and moving northeast into the lp tonight. in 
its wake, a 30.9 inch high builds over wyoming, weakening to 30.6 
inches friday as it expands over the plains while the low deepens to 
29.5 inches and heads towards new england. the high slides south of 
the great lakes at 30.4 inches by saturday night as a 29.4 inch 
alberta clipper moves into saskatchewan. sunday, the high builds 
back to 30.5 inches over the delmarva peninsula as the clipper moves 
into manitoba. ridging recovers over the great lakes monday.




lsz263-152000-
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-
401 am edt thu oct 15 2026

...gale warning in effect from late tonight through friday
afternoon...

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...south winds 5 to 15 knots. a chance of showers through
early afternoon, then showers by mid afternoon. waves calm to
2 feet. 
.tonight...west winds 10 to 20 knots becoming north 15 to
25 knots after midnight, then increasing to gales to 40 knots
late. showers through midnight, then a chance of showers after
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
late. a slight chance of rain showers through early afternoon.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...northwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.saturday night...southwest gales to 45 knots. waves building to
10 to 14 feet occasionally to 18 feet. 
.sunday...southwest storm force winds to 50 knots becoming west
gales to 35 knots. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 

$$