fzus63 kmqt 031401
glfls 
expires:202604032000;;763877

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri apr 3 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...

29.5 inch low pressure over the straights will move to the 
ontario/quebec line at 29.6 inches by late friday morning. as this 
happens, another colorado low moves into kansas at 29.6 inches by 
friday. this low moves into eastern iowa by friday night as 
sprawling 30.7 inch high pressure resides over far northern quebec 
and hudson bay. the low moves through the upper great lakes at 
around 29.6 inches late saturday, with lake superior looking to be 
between the low at 29.3 inches now over northern quebec and a 30.3 
inch high over the great plains by sunday. pressure rises on lake 
superior early next week as the high builds to 30.6 inches over the 
red river valley (of the north) on monday before moving into the 
western great lakes by tuesday.



lsz162-032000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt fri apr 3 2026 /900 am cdt fri apr 3 2026/

...gale warning in effect from late tonight through saturday
afternoon...

.rest of today...northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then veering east late. a chance
of sleet and snow by mid afternoon. waves 3 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 20 to 30 knots increasing to gales to
40 knots after midnight. a chance of snow, possibly mixed with
sleet through midnight. a chance of rain. snow, possibly mixed
with sleet after midnight. waves building to 10 to 14 feet
occasionally to 18 feet. 
.saturday...east gales to 40 knots becoming northeast gales to
35 knots in the afternoon, then diminishing to 20 to 30 knots
late. rain through early afternoon. snow, possibly mixed with
sleet. a slight chance of rain by mid afternoon. waves subsiding
to 6 to 9 feet occasionally to 11 feet. 
.saturday night...northwest winds 15 to 25 knots. a chance of
snow showers through midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots backing west by mid
afternoon. a slight chance of rain showers by mid afternoon.
waves subsiding to calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. a chance of rain showers. a chance
of snow showers after midnight. waves building to 1 to 3 feet. 
.monday...north winds 15 to 25 knots becoming northwest 10 to
20 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots becoming south 20 to
30 knots. a chance of rain and snow showers. waves building to
4 to 7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202604032000;;763878

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri apr 3 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...

29.5 inch low pressure over the straights will move to the 
ontario/quebec line at 29.6 inches by late friday morning. as this 
happens, another colorado low moves into kansas at 29.6 inches by 
friday. this low moves into eastern iowa by friday night as 
sprawling 30.7 inch high pressure resides over far northern quebec 
and hudson bay. the low moves through the upper great lakes at 
around 29.6 inches late saturday, with lake superior looking to be 
between the low at 29.3 inches now over northern quebec and a 30.3 
inch high over the great plains by sunday. pressure rises on lake 
superior early next week as the high builds to 30.6 inches over the 
red river valley (of the north) on monday before moving into the 
western great lakes by tuesday.



lsz263-032000-
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 am edt fri apr 3 2026

...gale warning in effect from late tonight through saturday
afternoon...

.rest of today...north winds 15 to 25 knots veering northeast in
the afternoon. waves 4 to 7 feet occasionally to 9 feet subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.tonight...east winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of rain, snow and sleet through
midnight, then sleet, possibly mixed with snow and rain likely
after midnight. waves building to 8 to 11 feet occasionally to
14 feet. 
.saturday...east gales to 35 knots becoming northeast 20 to
30 knots late. sleet through early afternoon. snow, possibly
mixed with rain. a slight chance of sleet by mid afternoon. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet. 
.saturday night...northwest winds 20 to 30 knots. a chance of
snow showers. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots becoming northwest 10 to
20 knots after midnight. a chance of rain showers. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of snow showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 1 to 3 feet. 
.tuesday...west winds 10 to 20 knots becoming south 20 to
30 knots. a chance of rain and snow showers. waves building to
5 to 8 feet occasionally to 10 feet. 

$$