fzus63 kmqt 250801
glfls 
expires:202604252000;;486407

open lake forecast for lake superior
national weather service marquette mi
401 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...

lake superior is currently in 30.0 inch ridging between 29.8 inch 
low pressures over lake erie and southern saskatchewan. as both lows 
dissipate today, ridging builds over the lake to 30.2 inches 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-
401 am edt sat apr 25 2026 /301 am cdt sat apr 25 2026/

.early this morning...north winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...northeast winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots. a chance of rain
showers after midnight. 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 5 to 8 feet occasionally to 10 feet. 
.monday night...northeast winds 15 to 25 knots becoming north
20 to 30 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 winds 20 to 30 knots becoming northwest 10 to
20 knots. a chance of rain showers. waves subsiding to 4 to
8 feet occasionally to 10 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 250801
glfls 
expires:202604252000;;486408

open lake forecast for lake superior
national weather service marquette mi
401 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...

lake superior is currently in 30.0 inch ridging between 29.8 inch 
low pressures over lake erie and southern saskatchewan. as both lows 
dissipate today, ridging builds over the lake to 30.2 inches 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-
401 am edt sat apr 25 2026

.early this morning...northwest winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...north winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. patchy fog through early
afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots. 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, then subsiding to calm to 2 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. rain showers likely by mid afternoon. waves
building to 6 to 9 feet occasionally to 11 feet. 
.monday night...east winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. rain showers. waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet. 
.tuesday...west gales to 35 knots becoming northwest 15 to
25 knots. a chance of rain showers. waves subsiding to 6 to
9 feet occasionally to 11 feet, then building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$