fzus63 kmqt 281401
glfls 
expires:202603282000;;435038

open lake forecast for lake superior
national weather service marquette mi
1000 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...

today, a 30.6 inch low resides south of the great lakes, eventually 
weakening to 30.5 inches by this evening as it moves over the east 
coast tonight. upstream on sunday, a 29.7 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 tracks along the st. lawrence 
seaway 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. thursday, the high builds to 30.8 inches over 
quebec while 29.3 inch low rpessure organizes in the lee of the 
rockies.



lsz162-282000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sat mar 28 2026 /901 am cdt sat mar 28 2026/

.rest of today...southwest winds 15 to 25 knots diminishing to
10 to 20 knots late. a slight chance of snow showers. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves 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, possibly
mixed with rain 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 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 281401
glfls 
expires:202603282000;;435039

open lake forecast for lake superior
national weather service marquette mi
1000 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...

today, a 30.6 inch low resides south of the great lakes, eventually 
weakening to 30.5 inches by this evening as it moves over the east 
coast tonight. upstream on sunday, a 29.7 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 tracks along the st. lawrence 
seaway 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. thursday, the high builds to 30.8 inches over 
quebec while 29.3 inch low rpessure organizes in the lee of the 
rockies.



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-
1001 am edt sat mar 28 2026

.rest of today...southwest winds 10 to 20 knots backing south
late. a slight chance of snow showers by mid afternoon. waves
2 to 4 feet 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. a slight chance of rain and snow
showers 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 3 to 6 feet
occasionally to 8 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. 

$$