fzus63 kmqt 280801
glfls 
expires:202603282000;;422049

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat mar 28 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 30.7 inch high over the mid-mississippi valley this morning moves 
into the ohio river valley today, eventually weakening to 30.5 
inches by this evening as it continues eastward; the high eventually 
moves offshore into the atlantic by sunday. upstream on sunday, a 
29.6 inch low organizes over the central plains, lifting a 30.0 inch 
trough over lake superior by sunday night. this trough lingers over 
the great lakes and slowly deepens with time early this week, before 
the low pushes through at 29.5 inches on tuesday. as the low lifts 
into canada late tuesday, 30.3 inch high pressure builds over the 
northern plains, gradually building pressure over the upper great 
lakes by wednesday as the high presses east through ontario at 
around 30.5 inches.



lsz162-282000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sat mar 28 2026 /301 am cdt sat mar 28 2026/

.early this morning...west winds 10 to 20 knots. waves 1 to
3 feet. 
.today...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. a slight chance of snow showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of snow showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...northeast winds 15 to 25 knots. a chance of snow
showers through midnight. a chance of rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...north winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...east winds 10 to 20 knots. waves subsiding to calm
to 2 feet, then building to 2 to 4 feet. 

$$

fzus63 kmqt 280801
glfls 
expires:202603282000;;422050

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat mar 28 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 30.7 inch high over the mid-mississippi valley this morning moves 
into the ohio river valley today, eventually weakening to 30.5 
inches by this evening as it continues eastward; the high eventually 
moves offshore into the atlantic by sunday. upstream on sunday, a 
29.6 inch low organizes over the central plains, lifting a 30.0 inch 
trough over lake superior by sunday night. this trough lingers over 
the great lakes and slowly deepens with time early this week, before 
the low pushes through at 29.5 inches on tuesday. as the low lifts 
into canada late tuesday, 30.3 inch high pressure builds over the 
northern plains, gradually building pressure over the upper great 
lakes by wednesday as the high presses east through ontario at 
around 30.5 inches.



lsz263-282000-
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 sat mar 28 2026

.early this morning...west winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...west winds 10 to 20 knots backing south late. a slight
chance of snow showers by mid afternoon. waves subsiding to 1 to
3 feet. 
.tonight...south winds 5 to 15 knots backing northeast after
midnight. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots becoming east 15 to
25 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday night...east winds 15 to 25 knots. a chance of rain
showers, possibly mixed with snow. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...north winds 20 to 30 knots. a chance of rain showers.
freezing spray. waves building to 5 to 9 feet occasionally to
11 feet. 
.wednesday...north winds 15 to 25 knots becoming southeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 

$$