fzus63 kmqt 120201
glfls 
expires:202610120800;;943937

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun oct 11 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 under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is moving 
into hudson bay from northern manitoba. by monday afternoon, the 
high will weaken to 30.2 inches along the hudson bay shore of 
northern ontario while the colorado low moves to the missouri river 
basin, weakening to 29.6 inches. this low weakens further to 29.7 
inches over northern lake michigan tuesday morning as the high 
shifts into quebec. ridging dominates over lake superior as the low 
continues marching east and high pressure of 30.2 inches builds over 
the dakotas by wednesday afternoon. the high further builds to 30.3 
inches over the lake wednesday night while a 29.9 inch low develops 
over saskatchewan. by thursday evening, this low weakens to 30.0 
inches over northern ontario as the high moves to new england. 
behind the low, a 30.7 inch high builds over eastern montana before 
expanding over the plains for friday.




lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sun oct 11 2026 /901 pm cdt sun oct 11 2026/

...gale warning in effect from 5 am edt /4 am cdt/ monday through
late monday night...

.rest of tonight...northeast winds 15 to 25 knots increasing to
gales to 35 knots. a slight chance of showers after midnight.
waves 1 to 3 feet building to 6 to 9 feet occasionally to
11 feet. 
.monday...northeast gales to 40 knots. a chance of showers. waves
building to 8 to 12 feet occasionally to 15 feet. 
.monday night...northeast gales to 35 knots diminishing to 20 to
30 knots late. a slight chance of thunderstorms through midnight.
a chance of showers. waves subsiding to 5 to 8 feet occasionally
to 10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. a slight chance of showers through
early afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming west gales to
40 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...northwest gales to 45 knots. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202610120800;;943938

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun oct 11 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 under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is moving 
into hudson bay from northern manitoba. by monday afternoon, the 
high will weaken to 30.2 inches along the hudson bay shore of 
northern ontario while the colorado low moves to the missouri river 
basin, weakening to 29.6 inches. this low weakens further to 29.7 
inches over northern lake michigan tuesday morning as the high 
shifts into quebec. ridging dominates over lake superior as the low 
continues marching east and high pressure of 30.2 inches builds over 
the dakotas by wednesday afternoon. the high further builds to 30.3 
inches over the lake wednesday night while a 29.9 inch low develops 
over saskatchewan. by thursday evening, this low weakens to 30.0 
inches over northern ontario as the high moves to new england. 
behind the low, a 30.7 inch high builds over eastern montana before 
expanding over the plains for friday.




lsz263-120800-
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-
1001 pm edt sun oct 11 2026

...gale warning in effect from 5 am edt monday through monday
morning...

.rest of tonight...northeast winds 15 to 25 knots increasing to
gales to 35 knots. a slight chance of showers after midnight.
waves 2 to 4 feet building to 7 to 10 feet occasionally to
13 feet. 
.monday...northeast gales to 35 knots diminishing to 20 to
30 knots late. a chance of showers. waves building to 7 to
11 feet occasionally to 14 feet. 
.monday night...northeast winds 20 to 30 knots. a slight chance
of thunderstorms through midnight. a chance of showers. waves
subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. a slight chance of showers through
early afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.thursday...south winds 15 to 25 knots becoming west gales to
40 knots. a chance of rain showers. waves building to 7 to
10 feet occasionally to 13 feet. 
.friday...north gales to 45 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$