fzus63 kmqt 290201
glfls 
expires:202603290800;;461434

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

this afternoon, a 30.5 inch low resides over lake erie and will 
track 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 pressure organizes in the lee 
of the rockies.



lsz162-290800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sat mar 28 2026 /900 pm cdt sat mar 28 2026/

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

$$

fzus63 kmqt 290201
glfls 
expires:202603290800;;461435

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

this afternoon, a 30.5 inch low resides over lake erie and will 
track 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 pressure organizes in the lee 
of the rockies.



lsz263-290800-
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-
1000 pm edt sat mar 28 2026

.rest of tonight...southeast winds 5 to 15 knots backing
northeast after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. waves building to 1 to
3 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. waves subsiding to calm to 2 feet. 
.monday...northeast winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. a slight chance of snow showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...east winds 15 to 25 knots backing northeast after
midnight. a chance of snow showers through midnight. a chance of
rain showers. snow showers likely after midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northeast winds 15 to 25 knots backing north by mid
afternoon. a chance of freezing rain through early afternoon. a
chance of snow showers, possibly mixed with rain. waves building
to 5 to 8 feet occasionally to 10 feet. 
.tuesday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. freezing spray after midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 10 to 20 knots veering east. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.thursday...east winds 20 to 30 knots. waves building to 6 to
9 feet occasionally to 11 feet. 

$$