fzus63 kmqt 290801
glfls 
expires:202608292000;;542179

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat aug 29 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...

30.0 inch ridging over lake superior today breaks down by this 
afternoon as the parent high moves offshore. a 29.6 inch low 
develops over the central and northern plains tonight before lifting 
north into the canadian prairies early next week. the new 29.4 inch 
low over the canadian prairies on monday is projected to bring 29.8 
inch troughing over lake superior by late monday. weak high pressure 
ridging of 29.9 inches looks to make a quick return on tuesday 
before being replaced by weak 29.8 inch troughing tuesday night and 
wednesday morning. 




lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat aug 29 2026 /300 am cdt sat aug 29 2026/

.early this morning...east winds 5 to 15 knots. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.today...east winds 5 to 15 knots. a slight chance of
thunderstorms through early afternoon. a chance of showers. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. a slight chance of showers through midnight. patchy
fog. waves calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. areas of dense fog through early afternoon. a slight
chance of showers. waves building to 2 to 4 feet. 
.sunday night...northeast winds 15 to 25 knots veering east after
midnight. a slight chance of showers through midnight, then
showers likely and a slight chance of thunderstorms after
midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing northeast.
waves calm to 2 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202608292000;;542180

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat aug 29 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...

30.0 inch ridging over lake superior today breaks down by this 
afternoon as the parent high moves offshore. a 29.6 inch low 
develops over the central and northern plains tonight before lifting 
north into the canadian prairies early next week. the new 29.4 inch 
low over the canadian prairies on monday is projected to bring 29.8 
inch troughing over lake superior by late monday. weak high pressure 
ridging of 29.9 inches looks to make a quick return on tuesday 
before being replaced by weak 29.8 inch troughing tuesday night and 
wednesday morning. 




lsz263-292000-
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-
400 am edt sat aug 29 2026

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots. a slight chance of
thunderstorms through early afternoon. a chance of showers. waves
calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight, then backing east late. a slight chance of showers
through midnight. patchy fog. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon. patchy dense fog through early
afternoon. a slight chance of showers by mid afternoon. waves
building to 1 to 3 feet. 
.sunday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a slight chance of showers through
midnight, then showers likely and a slight chance of
thunderstorms after midnight. waves 1 to 3 feet. 
.monday...southeast winds 10 to 20 knots backing east by mid
afternoon. showers likely through early afternoon. waves building
to 2 to 4 feet. 
.monday night...northeast winds 5 to 15 knots veering southwest
after midnight. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$