fzus63 kmqt 050201
glfls 
expires:202606050800;;196161

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt thu jun 4 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 29.7 inch low over northwest ontario is extending 29.8 inch 
troughing over the lake this evening. throughout tonight and friday, 
the low moves slowly east along the northern shores of lake superior 
while deepening to 29.6 inches. by early saturday morning, the low 
moves into quebec, shifting southeastwards towards the st. lawrence 
seaway through the day as weak 29.9 inch ridging moves over lake 
superior late. in the meantime, a 29.3 inch low pressure forms in 
the lee of the rockies. ridging over lake superior builds to 30.1 
inches by sunday as the low weakens to 29.4 inches and moves into 
the western dakotas. by monday afternoon, expect lake superior to be 
between a 29.8 inch trough over minnesota and 30.2 inch high 
pressure over new england. the troughing weakens to 29.9 inches 
before moving over lake superior on tuesday. 




lsz162-050800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt thu jun 4 2026 /900 pm cdt thu jun 4 2026/

.rest of tonight...northeast winds 5 to 15 knots veering
southwest late. a chance of showers and thunderstorms. waves calm
to 2 feet. 
.friday...southwest winds 5 to 15 knots. a slight chance of
showers and thunderstorms. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a slight chance of
showers and thunderstorms through midnight. waves calm to 2 feet.
.saturday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050201
glfls 
expires:202606050800;;196162

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt thu jun 4 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 29.7 inch low over northwest ontario is extending 29.8 inch 
troughing over the lake this evening. throughout tonight and friday, 
the low moves slowly east along the northern shores of lake superior 
while deepening to 29.6 inches. by early saturday morning, the low 
moves into quebec, shifting southeastwards towards the st. lawrence 
seaway through the day as weak 29.9 inch ridging moves over lake 
superior late. in the meantime, a 29.3 inch low pressure forms in 
the lee of the rockies. ridging over lake superior builds to 30.1 
inches by sunday as the low weakens to 29.4 inches and moves into 
the western dakotas. by monday afternoon, expect lake superior to be 
between a 29.8 inch trough over minnesota and 30.2 inch high 
pressure over new england. the troughing weakens to 29.9 inches 
before moving over lake superior on tuesday. 




lsz263-050800-
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 edt thu jun 4 2026

.rest of tonight...south winds 5 to 15 knots veering southwest
after midnight. a chance of showers and thunderstorms. waves calm
to 2 feet. 
.friday...southwest winds 5 to 15 knots. a slight chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a slight chance of
showers and thunderstorms through midnight. waves calm to 2 feet.
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...east winds 10 to 20 knots veering southeast after
midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots becoming southeast 5 to
15 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots veering east. waves
subsiding to calm to 2 feet. 

$$