fzus63 kmqt 272101
glfls 
expires:202511280900;;613484

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu nov 27 2025

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 will spend the rest of thanksgiving between a 30.6 
inch high over the dakotas and a 29.4 inch low over quebec. by 
friday, the high will weaken slightly to 30.5 inches as it shifts 
over the upper mississippi river valley while the low weakens to 
29.5 inches, still over quebec. meanwhile, a 29.7 inch colorado low 
develops, which will move over oklahoma at 29.8 inches on saturday 
while 30.4 inch high pressure spans the great lakes. the low ejects 
into the southern great lakes basin early sunday morning at 29.9 
inches, reaching the southern ontario/quebec border at 29.8 inches 
sunday evening. in its wake, 30.6 inch high pressure moves over the 
upper midwest, sliding south of the great lakes at 30.4 inches 
monday. the high is eroded on tuesday by a low pressure of around 
29.8 inches over northern ontario and a 29.5 inch nor'easter off the 
coast of the chesapeake bay.



lsz162-280900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est thu nov 27 2025 /300 pm cst thu nov 27 2025/

.late this afternoon...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. waves subsiding to 3 to 5 feet occasionally
to 7 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots veering north by
midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering northeast in the
afternoon. a chance of snow showers. waves calm to 2 feet. 
.saturday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of snow showers. waves building
to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 15 to 25 knots veering west. waves
building to 1 to 3 feet. 
.tuesday...southwest winds 10 to 20 knots veering west. a chance
of snow showers. waves 1 to 3 feet. 

$$

fzus63 kmqt 272101
glfls 
expires:202511280900;;613485

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu nov 27 2025

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 will spend the rest of thanksgiving between a 30.6 
inch high over the dakotas and a 29.4 inch low over quebec. by 
friday, the high will weaken slightly to 30.5 inches as it shifts 
over the upper mississippi river valley while the low weakens to 
29.5 inches, still over quebec. meanwhile, a 29.7 inch colorado low 
develops, which will move over oklahoma at 29.8 inches on saturday 
while 30.4 inch high pressure spans the great lakes. the low ejects 
into the southern great lakes basin early sunday morning at 29.9 
inches, reaching the southern ontario/quebec border at 29.8 inches 
sunday evening. in its wake, 30.6 inch high pressure moves over the 
upper midwest, sliding south of the great lakes at 30.4 inches 
monday. the high is eroded on tuesday by a low pressure of around 
29.8 inches over northern ontario and a 29.5 inch nor'easter off the 
coast of the chesapeake bay.



lsz263-280900-
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-
400 pm est thu nov 27 2025

.late this afternoon...north winds 20 to 30 knots. a slight
chance of snow showers. waves 5 to 8 feet occasionally to
10 feet. 
.tonight...north winds 20 to 30 knots backing northwest late. a
slight chance of snow showers. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. a slight chance of snow showers in the morning. waves
subsiding to 1 to 3 feet. 
.friday night...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering northeast in the
afternoon. a chance of snow showers. waves calm to 2 feet. 
.saturday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of snow showers. waves building
to 2 to 4 feet. 
.sunday...northwest winds 20 to 30 knots. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.monday...west winds 20 to 30 knots backing southwest. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest winds 15 to 25 knots veering west. a chance
of snow showers. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 

$$