fzus63 kmqt 131428
glfls 
expires:202603132230;;604088

open lake forecast for lake superior
national weather service marquette mi
1028 am edt fri mar 13 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...

a 29.1 inch low moving over northern lake michigan this morning and 
early this afternoon will continue into lake huron at 29.3 inches 
this evening before moving over new england at 29.6 inches by 
saturday morning. a 30.2 inch ridge then extends over lake superior 
from central canada by saturday afternoon. following the ridge, a 
29.2 inch low developing over the central plains saturday night 
tracks through lower michigan at 29.1 inches sunday night before 
lifting into northern ontario at 29.0 inches on monday. high 
pressure of 30.4 inches then overspreads the northern plains on 
monday and moves into lake superior at 30.1 inches by tuesday. a 
weakening 29.8 inch low then moves over northern ontario on 
wednesday.



lsz162-132230-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1028 am edt fri mar 13 2026 /928 am cdt fri mar 13 2026/

...gale warning in effect until 2 pm edt /1 pm cdt/ this
afternoon...

.rest of today...north gales to 35 knots diminishing to 15 to
25 knots late. a chance of snow. waves 9 to 12 feet occasionally
to 15 feet subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south late.
waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast
15 to 25 knots after midnight. a slight chance of snow. waves
building to 2 to 4 feet. 
.sunday...northeast gales to 40 knots. a chance of snow. freezing
spray by mid afternoon. waves building to 10 to 14 feet
occasionally to 18 feet. 
.sunday night...north gales to 45 knots increasing to storm force
winds to 50 knots after midnight. heavy freezing spray. a chance
of snow. waves building to 12 to 17 feet occasionally to 21 feet.
.monday...north storm force winds to 55 knots diminishing to
gales to 35 knots. heavy freezing spray. waves subsiding to 2 to
4 feet. 
.tuesday...southwest winds 10 to 20 knots backing south. a chance
of snow showers. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 

$$

fzus63 kmqt 131428
glfls 
expires:202603132230;;604089

open lake forecast for lake superior
national weather service marquette mi
1028 am edt fri mar 13 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...

a 29.1 inch low moving over northern lake michigan this morning and 
early this afternoon will continue into lake huron at 29.3 inches 
this evening before moving over new england at 29.6 inches by 
saturday morning. a 30.2 inch ridge then extends over lake superior 
from central canada by saturday afternoon. following the ridge, a 
29.2 inch low developing over the central plains saturday night 
tracks through lower michigan at 29.1 inches sunday night before 
lifting into northern ontario at 29.0 inches on monday. high 
pressure of 30.4 inches then overspreads the northern plains on 
monday and moves into lake superior at 30.1 inches by tuesday. a 
weakening 29.8 inch low then moves over northern ontario on 
wednesday.



lsz263-132230-
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-
1028 am edt fri mar 13 2026

...gale warning in effect until 2 pm edt this afternoon...

.rest of today...northeast gales to 35 knots backing north in the
afternoon, then diminishing to 15 to 25 knots late. freezing
spray by late morning. snow likely by late morning, then a chance
of snow by mid afternoon. waves 9 to 12 feet occasionally to
15 feet subsiding to 4 to 7 feet occasionally to 9 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots becoming east
10 to 20 knots after midnight. a slight chance of snow after
midnight. waves building to 1 to 3 feet. 
.sunday...northeast gales to 40 knots. freezing spray. a chance
of snow through early afternoon. snow likely by mid afternoon.
waves building to 10 to 14 feet occasionally to 18 feet. 
.sunday night...north gales to 45 knots increasing to storm force
winds to 55 knots after midnight. heavy freezing spray. a chance
of snow. waves building to 17 to 22 feet occasionally to 28 feet.
.monday...north storm force winds to 60 knots diminishing to
gales to 45 knots. heavy freezing spray. a chance of snow
showers. waves subsiding to 7 to 10 feet occasionally to 13 feet.
.tuesday...north winds 20 to 30 knots becoming south 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$