fzus63 kmqt 070801
glfls 
expires:202607072000;;555010

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jul 7 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 29.5 inch low over hudson bay is extending weak 30.0 inch 
troughing over the lake this morning. this trough retreats north of 
the lake today as a 30.1 inch high over the northern plains extends 
30.0 inch ridging over the upper great lakes through tonight. as the 
hudson low moves into northern quebec throughout wednesday, it will 
send a trough as low as 29.8 inches over the upper great lakes. weak 
high pressure to 30.0 inches then builds over lake superior and 
northern ontario thursday and friday. saturday, the high builds to 
30.1 inches as it shifts towards southern ontario. the high 
continues to shift south sunday into monday as low pressure of at 
least 29.7 inches moves across northern ontario.




lsz162-072000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue jul 7 2026 /301 am cdt tue jul 7 2026/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots backing northwest late. a
chance of showers and a slight chance of thunderstorms after
midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots veering east late.
showers likely through early afternoon. a slight chance of
thunderstorms. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.wednesday night...north winds less than 10 knots. a slight
chance of showers through midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming north less
than 10 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...north winds less than 10 knots. waves calm to
2 feet. 
.friday...east winds less than 10 knots backing north. waves calm
to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 070801
glfls 
expires:202607072000;;555011

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jul 7 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 29.5 inch low over hudson bay is extending weak 30.0 inch 
troughing over the lake this morning. this trough retreats north of 
the lake today as a 30.1 inch high over the northern plains extends 
30.0 inch ridging over the upper great lakes through tonight. as the 
hudson low moves into northern quebec throughout wednesday, it will 
send a trough as low as 29.8 inches over the upper great lakes. weak 
high pressure to 30.0 inches then builds over lake superior and 
northern ontario thursday and friday. saturday, the high builds to 
30.1 inches as it shifts towards southern ontario. the high 
continues to shift south sunday into monday as low pressure of at 
least 29.7 inches moves across northern ontario.




lsz263-072000-
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-
401 am edt tue jul 7 2026

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots backing southwest late. a
slight chance of showers through early afternoon. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots becoming west less than
10 knots late. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...southwest winds less than 10 knots becoming east
5 to 15 knots in the afternoon, then backing northeast late. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots. a slight
chance of showers through midnight. waves calm to 2 feet. 
.thursday...northeast winds less than 10 knots. waves calm to
2 feet. 
.thursday night...west winds less than 10 knots. waves calm to
2 feet. 
.friday...northeast winds less than 10 knots veering southwest.
waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$