fzus63 kmqt 311401
glfls 
expires:202607312000;;391051

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri jul 31 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 29.6 inch low pressure moving across eastern hudson bay this 
morning is dragging a 29.9 inch trough over the lake. troughing 
lingers over the lake into early saturday morning as the parent low 
moves into quebec. a 30.0 inch high will build over james bay on 
saturday, extending a weak 29.9 inch ridge over the lake. ridging 
over the lake builds further to 30.0 inches on sunday, lingering 
into monday. a weak trough of 29.9 inches then moves through the 
area on tuesday followed by 30.0 inch ridging on wednesday.




lsz162-312000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt fri jul 31 2026 /901 am cdt fri jul 31 2026/

.rest of today...west winds 5 to 15 knots backing southwest in
the afternoon. patchy smoke. a chance of showers and a slight
chance of thunderstorms. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering northeast late. patchy smoke through
midnight. a slight chance of showers through midnight. waves calm
to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...east winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202607312000;;391052

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri jul 31 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 29.6 inch low pressure moving across eastern hudson bay this 
morning is dragging a 29.9 inch trough over the lake. troughing 
lingers over the lake into early saturday morning as the parent low 
moves into quebec. a 30.0 inch high will build over james bay on 
saturday, extending a weak 29.9 inch ridge over the lake. ridging 
over the lake builds further to 30.0 inches on sunday, lingering 
into monday. a weak trough of 29.9 inches then moves through the 
area on tuesday followed by 30.0 inch ridging on wednesday.




lsz263-312000-
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-
1001 am edt fri jul 31 2026

.rest of today...west winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. patchy smoke. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering north late. patchy
smoke through midnight. a slight chance of showers and
thunderstorms through midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots increasing to 10 to 20 knots.
waves building to 1 to 3 feet. 
.tuesday...southwest winds 10 to 20 knots veering northwest.
waves subsiding to calm to 2 feet. 

$$