fzus63 kmqt 011401
glfls 
expires:202604012000;;648896

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



lsz263-012000-
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 wed apr 1 2026

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

.rest of today...east winds 5 to 15 knots increasing to 15 to
25 knots. waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet. 
.tonight...east winds 15 to 25 knots. 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. snow, possibly mixed with sleet. rain,
possibly mixed with freezing rain by mid afternoon. waves
building to 10 to 14 feet occasionally to 18 feet. 
.thursday night...northeast gales to 40 knots becoming north
gales to 35 knots after midnight. sleet, possibly mixed with
snow, rain and freezing rain through midnight, then a chance of
snow, possibly mixed with sleet, freezing rain and rain likely
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 freezing rain, snow and sleet.
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 likely with pockets of rain
after midnight. waves building to 8 to 11 feet occasionally to
14 feet. 
.saturday...northeast gales to 35 knots backing north. snow,
possibly mixed with rain, then a chance of snow showers. waves
subsiding to 7 to 10 feet occasionally to 13 feet, then building
to 8 to 11 feet occasionally to 14 feet. 
.sunday...northwest gales to 35 knots becoming west 5 to
15 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 011401
glfls 
expires:202604012000;;648895

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



lsz162-012000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt wed apr 1 2026 /900 am cdt wed apr 1 2026/

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

.rest of today...east winds 15 to 25 knots. waves 2 to 4 feet
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 20 to 30 knots. a slight chance of snow.
waves building to 5 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 40 knots. snow. a slight chance of
sleet by mid afternoon. waves building to 11 to 15 feet
occasionally to 19 feet. 
.thursday night...northeast gales to 40 knots becoming north
gales to 35 knots after midnight. snow and sleet, possibly mixed
with rain through midnight, then a chance of snow, possibly mixed
with sleet after midnight. waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.friday...northeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. a chance of snow, possibly mixed with
sleet. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday night...east winds 20 to 30 knots becoming northeast
gales to 40 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 40 knots becoming north gales to
35 knots. snow, then a chance of snow showers. waves building to
9 to 12 feet occasionally to 15 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.sunday...west winds 20 to 30 knots diminishing to 5 to 15 knots.
waves subsiding to calm to 2 feet. 

$$