fzus63 kmqt 310201
glfls 
expires:202607310800;;363867

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz162-310800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu jul 30 2026 /901 pm cdt thu jul 30 2026/

.rest of tonight...southwest winds 5 to 15 knots veering west
late. patchy smoke. a slight chance of showers and thunderstorms
after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon, then veering west late. a chance of showers and a
slight chance of thunderstorms. patchy smoke by mid afternoon.
waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke through midnight. a slight chance of showers through
midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. 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 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 310201
glfls 
expires:202607310800;;363868

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 30 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... 

29.7 inch low pressure is moving over hudson bay tonight, dragging a 
29.9 inch trough over the lake. troughing lingers over the lake 
through late friday 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 will build to 30.0 
inches on sunday and linger into monday. a weak trough of 29.9 
inches will move through the area on tuesday.




lsz263-310800-
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 pm edt thu jul 30 2026

.rest of tonight...southwest winds 5 to 15 knots veering west
late. patchy smoke. a slight chance of showers and thunderstorms.
waves 1 to 3 feet subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots. patchy smoke. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke. a slight chance of showers. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. 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...east winds 5 to 15 knots veering south 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 becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$