fzus63 kmqt 012001
glfls 
expires:202604020800;;664622

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 1 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...

30.4 inch ridging over northern lake superior this morning 
strengthens to 30.5 inches today as the parent high moves over james 
bay this afternoon. expect the ridging to give way to troughing this 
evening into thursday as a 29.4 inch low exits the colorado rockies 
and lifts through the central plains tonight. throughout the day 
thursday this low moves northeast, reaching southern wisconsin at 
29.5 inches thursday evening. the low shifts through northern lake 
michigan thursday night before arriving at the ontario/quebec line 
at 29.7 inches on friday. as this happens, another colorado low 
moves into kansas at 29.7 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 29.6 inches on saturday and by 
sunday lake superior looks to be between the low now at 29.3 inches 
over northern quebec and a 30.3 inch high over the great plains.



lsz162-020800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt wed apr 1 2026 /300 pm cdt wed apr 1 2026/

...gale warning in effect from thursday morning through late
thursday night...

.late this afternoon...east winds 20 to 30 knots. a slight chance
of snow showers. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. a slight chance of snow. waves building
to 4 to 7 feet occasionally to 9 feet. 
.thursday...east winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. a chance of snow through early
afternoon, then snow, possibly mixed with sleet by mid afternoon.
waves building to 12 to 17 feet occasionally to 21 feet. 
.thursday night...northeast gales to 40 knots becoming north
20 to 30 knots late. snow, possibly mixed with sleet through
midnight, then a chance of snow after midnight. waves subsiding
to 5 to 8 feet occasionally to 10 feet. 
.friday...north winds 15 to 25 knots veering east by mid
afternoon. a slight chance of snow showers and sleet, possibly
mixed with freezing rain by mid afternoon. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.friday night...east winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of snow through midnight. snow
after midnight. waves building to 8 to 11 feet occasionally to
14 feet. 
.saturday...northeast gales to 35 knots becoming north 20 to
30 knots by mid afternoon. rain through early afternoon. snow.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.saturday night...north winds 20 to 30 knots backing northwest
after midnight. a chance of snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.sunday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...north winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 012001
glfls 
expires:202604020800;;664623

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 1 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...

30.4 inch ridging over northern lake superior this morning 
strengthens to 30.5 inches today as the parent high moves over james 
bay this afternoon. expect the ridging to give way to troughing this 
evening into thursday as a 29.4 inch low exits the colorado rockies 
and lifts through the central plains tonight. throughout the day 
thursday this low moves northeast, reaching southern wisconsin at 
29.5 inches thursday evening. the low shifts through northern lake 
michigan thursday night before arriving at the ontario/quebec line 
at 29.7 inches on friday. as this happens, another colorado low 
moves into kansas at 29.7 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 29.6 inches on saturday and by 
sunday lake superior looks to be between the low now at 29.3 inches 
over northern quebec and a 30.3 inch high over the great plains.



lsz263-020800-
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-
400 pm edt wed apr 1 2026

...gale warning in effect from thursday morning through late
thursday night...

.late this afternoon...east winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
a slight chance of snow through midnight. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday...east winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. a chance of snow through early
afternoon, then snow, possibly mixed with sleet by mid afternoon.
waves building to 10 to 14 feet occasionally to 18 feet. 
.thursday night...northeast gales to 40 knots becoming north
20 to 30 knots late. snow, possibly mixed with sleet through
midnight, then a chance of snow, possibly mixed with sleet after
midnight. waves subsiding to 6 to 9 feet occasionally to 11 feet.
.friday...north winds 15 to 25 knots veering northeast by mid
afternoon. a slight chance of sleet through early afternoon. a
slight chance of snow showers. a slight chance of rain showers by
mid afternoon. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday night...east winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of snow, possibly mixed with
rain through midnight, then snow, possibly mixed with rain after
midnight. waves building to 7 to 10 feet occasionally to 13 feet.
.saturday...northeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. rain through early afternoon. snow.
waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 
.saturday night...north winds 20 to 30 knots backing northwest
after midnight. a chance of snow showers. waves building to 6 to
10 feet occasionally to 13 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.monday...north winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 

$$