fzus63 kmqt 010300
glfls 
expires:202603010900;;424017

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat feb 28 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...

30.6 inch high pressure over southern manitoba builds in from the 
northwest, becoming centered over upper michigan sunday afternoon. 
the high contnues its eastward march monday, reaching new england 
and remaining at 30.6 inches. a weak 30.1 inch trough slides over 
the lake on monday night into tuesday as a 29.6 inch low pressure 
pushes through hudson bay and 29.7 inch low pressure develops over 
colorado. meanwhile, a 30.4 inch high over northern manitoba on 
tuesday moves into northern ontario late tuesday. as the colorado 
low weakens as it approaches the southern great lakes basin 
wednesday and thursday, a 30.6 inch high pressure moves over the 
northern ontario hudson bay shoreline.



lsz162-010900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est sat feb 28 2026 /900 pm cst sat feb 28 2026/

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

$$

fzus63 kmqt 010300
glfls 
expires:202603010900;;424018

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat feb 28 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...

30.6 inch high pressure over southern manitoba builds in from the 
northwest, becoming centered over upper michigan sunday afternoon. 
the high contnues its eastward march monday, reaching new england 
and remaining at 30.6 inches. a weak 30.1 inch trough slides over 
the lake on monday night into tuesday as a 29.6 inch low pressure 
pushes through hudson bay and 29.7 inch low pressure develops over 
colorado. meanwhile, a 30.4 inch high over northern manitoba on 
tuesday moves into northern ontario late tuesday. as the colorado 
low weakens as it approaches the southern great lakes basin 
wednesday and thursday, a 30.6 inch high pressure moves over the 
northern ontario hudson bay shoreline.



lsz263-010900-
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 est sat feb 28 2026

.rest of tonight...north winds 5 to 15 knots. a slight chance of.
waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots backing south by
midnight. waves calm to 2 feet. 
.monday...southwest winds 10 to 20 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.monday night...southwest gales to 35 knots. waves subsiding to
calm to 2 feet. 
.tuesday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves calm to 2 feet. 
.tuesday night...west winds 20 to 30 knots. waves building to
1 to 3 feet. 
.wednesday...west winds 20 to 30 knots backing east. waves
subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.thursday...east winds 20 to 30 knots becoming northeast 15 to
25 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet. 

$$