fzus63 kmqt 251403
glfls 
expires:202604252000;;499446

open lake forecast for lake superior
national weather service marquette mi
1002 am edt sat apr 25 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...

ridging slowly rises over lake superior to 30.1 inches by sunday 
morning as 30.4 inch high pressure over northern quebec builds. the 
pattern remains stable over lake superior sunday while a 29.3 inch 
colorado low develops. throughout monday, this low moves northeast, 
arriving in wisconsin monday night. the low then crosses lake 
superior tuesday, reaching james bay tuesday night. in the wake of 
the low, 30.2 inch high pressure builds over the canadian prairie, 
sending 30.1 inch high pressure over the lake wednesday. this high 
approaches the great lakes slowly thursday.



lsz162-252000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1002 am edt sat apr 25 2026 /902 am cdt sat apr 25 2026/

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

$$

fzus63 kmqt 251403
glfls 
expires:202604252000;;499447

open lake forecast for lake superior
national weather service marquette mi
1002 am edt sat apr 25 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...

ridging slowly rises over lake superior to 30.1 inches by sunday 
morning as 30.4 inch high pressure over northern quebec builds. the 
pattern remains stable over lake superior sunday while a 29.3 inch 
colorado low develops. throughout monday, this low moves northeast, 
arriving in wisconsin monday night. the low then crosses lake 
superior tuesday, reaching james bay tuesday night. in the wake of 
the low, 30.2 inch high pressure builds over the canadian prairie, 
sending 30.1 inch high pressure over the lake wednesday. this high 
approaches the great lakes slowly thursday.



lsz263-252000-
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-
1002 am edt sat apr 25 2026

.rest of today...west winds less than 10 knots backing southwest
in the afternoon, then becoming east 5 to 15 knots late. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots. patchy fog. a slight chance
of rain showers after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast in the
afternoon. a slight chance of rain showers through early
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. waves building to 1 to
3 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a slight chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday night...east winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. rain showers. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...west gales to 35 knots becoming northwest 15 to
25 knots. a chance of rain showers. waves subsiding to 4 to
7 feet occasionally to 9 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$