fzus63 kmqt 140201
glfls 
expires:202603140800;;631769

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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 weakening 29.4 inch low moves across southeast ontario tonight, 
reaching new england at 29.6 inches by saturday morning. a 30.2 inch 
ridge then extends over lake superior from central canada on 
saturday. a 29.2 inch low developing over the central plains 
saturday night tracks through lower michigan sunday night to 
northern lake huron at 28.9 inches by monday morning before lifting 
into canada monday evening. high pressure of around 30.4 inches then 
overspreads the northern plains on monday and moves over lake 
superior at 30.1 inches by tuesday. a weakening clipper low around 
29.7 inches then moves over northern ontario late wednesday.



lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt fri mar 13 2026 /900 pm cdt fri mar 13 2026/

...gale watch in effect from sunday morning through late monday
night...

.rest of tonight...north winds 10 to 20 knots becoming northwest
5 to 15 knots late. waves 3 to 5 feet occasionally to 7 feet
subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing south late. waves
calm to 2 feet. 
.saturday night...east winds 10 to 20 knots increasing to
30 knots with a few gale force gusts to 35 knots possible late. a
chance of snow. waves building to 4 to 7 feet occasionally to
9 feet. 
.sunday...northeast gales to 45 knots. snow likely. freezing
spray by mid afternoon. waves building to 12 to 17 feet
occasionally to 21 feet. 
.sunday night...north gales to 45 knots. heavy freezing spray. a
chance of snow. waves 12 to 17 feet occasionally to 21 feet. 
.monday...north gales to 45 knots. heavy freezing spray. waves
subsiding to 8 to 11 feet occasionally to 14 feet. 
.monday night...north gales to 40 knots diminishing to 20 to
30 knots after midnight. heavy freezing spray through midnight.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest winds 15 to 25 knots becoming south 10 to
20 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...southwest winds 10 to 20 knots veering west. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 140201
glfls 
expires:202603140800;;631770

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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 weakening 29.4 inch low moves across southeast ontario tonight, 
reaching new england at 29.6 inches by saturday morning. a 30.2 inch 
ridge then extends over lake superior from central canada on 
saturday. a 29.2 inch low developing over the central plains 
saturday night tracks through lower michigan sunday night to 
northern lake huron at 28.9 inches by monday morning before lifting 
into canada monday evening. high pressure of around 30.4 inches then 
overspreads the northern plains on monday and moves over lake 
superior at 30.1 inches by tuesday. a weakening clipper low around 
29.7 inches then moves over northern ontario late wednesday.



lsz263-140800-
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 pm edt fri mar 13 2026

...gale watch in effect from sunday morning through sunday
evening...
...storm watch in effect from sunday evening through monday
evening...

.rest of tonight...north winds 15 to 25 knots diminishing to 5 to
15 knots. waves 4 to 7 feet occasionally to 9 feet subsiding to
1 to 3 feet. 
.saturday...west winds 5 to 15 knots backing southwest in the
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight, then becoming east 20 to 30 knots
late. a chance of snow. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday...northeast gales to 45 knots. freezing spray. snow
likely. waves building to 12 to 17 feet occasionally to 21 feet. 
.sunday night...north gales to 45 knots increasing to storm force
winds to 55 knots after midnight. heavy freezing spray. snow
likely through midnight. a chance of snow after midnight. waves
building to 17 to 22 feet occasionally to 28 feet. 
.monday...north storm force winds to 60 knots. heavy freezing
spray. a chance of snow. waves subsiding to 15 to 20 feet
occasionally to 25 feet. 
.monday night...north gales to 45 knots. heavy freezing spray.
waves subsiding to 7 to 10 feet occasionally to 13 feet. 
.tuesday...northwest winds 20 to 30 knots becoming south 15 to
25 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$