fzus63 kmqt 042028
glfls 
expires:202606050430;;185130

open lake forecast for lake superior
national weather service marquette mi
428 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 29.9 inch 
troughing over the lake while 30.1 inch highs are over eastern 
hudson bay and the southern appalachian range. throughout this 
evening and friday, the low will move slowly east along the northern 
shores of lake superior while the highs weaken. by early saturday 
morning, the low will be south of james bay along the ontario/quebec 
line. as the low shifts to southern quebec saturday evening, weak 
29.9 inch ridging will be over the lake as 29.3 inch low pressure 
forms in the lee of the rockies. ridging builds to 30.0 inches 
sunday as the low weakens to 29.4 inches and moves into the western 
dakotas. by monday afternoon, lake superior will be between 29.2 
inch low pressure over saskatchewan and 30.2 inch high pressure over 
the st. lawrence seaway. the low moves to the western shores of 
hudson bay while the high shifts to the atlantic seaboard on 
tuesday. 




lsz162-050430-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
428 pm edt thu jun 4 2026 /328 pm cdt thu jun 4 2026/

.late this afternoon...east winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.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 1 to
3 feet. 
.sunday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves building to 2 to 4 feet, then
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 042028
glfls 
expires:202606050430;;185131

open lake forecast for lake superior
national weather service marquette mi
428 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 29.9 inch 
troughing over the lake while 30.1 inch highs are over eastern 
hudson bay and the southern appalachian range. throughout this 
evening and friday, the low will move slowly east along the northern 
shores of lake superior while the highs weaken. by early saturday 
morning, the low will be south of james bay along the ontario/quebec 
line. as the low shifts to southern quebec saturday evening, weak 
29.9 inch ridging will be over the lake as 29.3 inch low pressure 
forms in the lee of the rockies. ridging builds to 30.0 inches 
sunday as the low weakens to 29.4 inches and moves into the western 
dakotas. by monday afternoon, lake superior will be between 29.2 
inch low pressure over saskatchewan and 30.2 inch high pressure over 
the st. lawrence seaway. the low moves to the western shores of 
hudson bay while the high shifts to the atlantic seaboard on 
tuesday. 




lsz263-050430-
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-
428 pm edt thu jun 4 2026

.late this afternoon...east winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots becoming southwest less than
10 knots after midnight, then increasing to 5 to 15 knots late. 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 1 to 3 feet. 
.sunday night...east winds 10 to 20 knots veering southeast after
midnight. waves building to 2 to 4 feet, then 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. 

$$