fzus63 kmqt 230801
glfls 
expires:202610232000;;039528

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri oct 23 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 30.5 inch high pressure over quebec settles south toward new 
england through tonight, extending a 30.2 inch ridge over lake 
superior. by saturday afternoon, a 29.2 inch low over northern 
manitoba drags a 30.1 inch trough over the west half of lake 
superior. the trough remains over the lake until saturday night. 
high pressure of at least 30.6 inches over the canadian prairies on 
sunday and monday pushes ridging of at least 30.4 inches over the 
upper great lakes on sunday. the ridging intensifies to 30.6 inches 
monday night into tuesday morning as the high's center moves 
overhead. the high retreats east into new england by wednesday 
morning. 




lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri oct 23 2026 /300 am cdt fri oct 23 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/ this
morning...

.early this morning...east winds 5 to 15 knots. areas of dense
fog. waves calm to 2 feet. 
.today...east winds 5 to 15 knots. areas of dense fog through
early afternoon, then patchy fog by mid afternoon. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering south after midnight,
then increasing to 10 to 20 knots late. patchy fog through
midnight. a slight chance of showers. waves building to 1 to
3 feet. 
.saturday...south winds 15 to 25 knots veering southwest late. a
chance of showers by mid afternoon. waves building to 2 to
4 feet. 
.saturday night...west winds 10 to 20 knots. a chance of showers
through midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots becoming east 10 to
20 knots. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots veering southeast. a chance
of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202610232000;;039529

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri oct 23 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 30.5 inch high pressure over quebec settles south toward new 
england through tonight, extending a 30.2 inch ridge over lake 
superior. by saturday afternoon, a 29.2 inch low over northern 
manitoba drags a 30.1 inch trough over the west half of lake 
superior. the trough remains over the lake until saturday night. 
high pressure of at least 30.6 inches over the canadian prairies on 
sunday and monday pushes ridging of at least 30.4 inches over the 
upper great lakes on sunday. the ridging intensifies to 30.6 inches 
monday night into tuesday morning as the high's center moves 
overhead. the high retreats east into new england by wednesday 
morning. 




lsz263-232000-
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 am edt fri oct 23 2026

...dense fog advisory in effect until 11 am edt this morning...

.early this morning...south winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.today...south winds 5 to 15 knots backing east late. patchy
dense fog through early afternoon. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. a slight chance of showers after midnight. waves
building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots veering southwest late. a
slight chance of showers by mid afternoon. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of showers through
midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 15 to 25 knots. waves building to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots veering east. waves subsiding
to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. a chance
of rain showers. waves calm to 2 feet. 

$$