fzus63 kmqt 140227
glfls 
expires:202610140800;;057203

open lake forecast for lake superior
national weather service marquette mi
1026 pm edt tue oct 13 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 29.8 inch low over new england 
and a 30.2 inch high over western montana. as the low reaches nova 
scotia wednesday morning, the high builds to 30.3 inches over the 
dakotas. the high then weakens to 30.2 inches wednesday night into 
thursday over the upper great lakes. meanwhile, a 29.9 inch low 
develops over saskatchewan as a 29.8 inch low forms over the texas 
panhandle. as the high shifts into western quebec thursday 
afternoon, the lows begin to converge over the upper midwest, 
consolidating into a 29.8 inch low over the southern michigan state 
lines thursday night. 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 over 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.




lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1026 pm edt tue oct 13 2026 /926 pm cdt tue oct 13 2026/

.rest of tonight...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southeast
late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.thursday night...northwest winds 20 to 30 knots increasing to
gales to 40 knots after midnight. a slight chance of showers.
waves building to 7 to 10 feet occasionally to 13 feet. 
.friday...north gales to 40 knots becoming northwest 20 to
30 knots by mid afternoon. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest gales to 35 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.sunday...southwest gales to 35 knots becoming west 15 to
25 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 140227
glfls 
expires:202610140800;;057204

open lake forecast for lake superior
national weather service marquette mi
1026 pm edt tue oct 13 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 29.8 inch low over new england 
and a 30.2 inch high over western montana. as the low reaches nova 
scotia wednesday morning, the high builds to 30.3 inches over the 
dakotas. the high then weakens to 30.2 inches wednesday night into 
thursday over the upper great lakes. meanwhile, a 29.9 inch low 
develops over saskatchewan as a 29.8 inch low forms over the texas 
panhandle. as the high shifts into western quebec thursday 
afternoon, the lows begin to converge over the upper midwest, 
consolidating into a 29.8 inch low over the southern michigan state 
lines thursday night. 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 over 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.




lsz263-140800-
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-
1026 pm edt tue oct 13 2026

.rest of tonight...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet building to
1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...east winds less than 10 knots becoming
southeast 5 to 15 knots late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.thursday night...west winds 20 to 30 knots becoming northwest
gales to 40 knots after midnight. showers likely through
midnight, then a chance of showers after midnight. waves building
to 9 to 12 feet occasionally to 15 feet. 
.friday...north gales to 45 knots becoming northwest gales to
40 knots by mid afternoon. waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...northwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...southwest gales to 40 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday...southwest gales to 45 knots becoming west 20 to
30 knots. waves subsiding to 1 to 3 feet. 

$$