fzus63 kmqt 090201
glfls 
expires:202505090800;;196165

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 2025

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 high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu may 8 2025 /901 pm cdt thu may 8 2025/

.rest of tonight...northeast winds 5 to 15 knots veering
southwest late. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots veering northeast
late. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...south winds 10 to 20 knots. waves building to 1 to
3 feet. 
.sunday night...southwest winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.monday...southwest winds 15 to 25 knots becoming south 10 to
20 knots. waves subsiding to 2 to 4 feet. 
.tuesday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196166

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 2025

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 high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz263-090800-
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-
1001 pm edt thu may 8 2025

.rest of tonight...east winds 5 to 15 knots becoming southeast
less than 10 knots after midnight, then becoming south 5 to
15 knots late. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday night...west winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then veering northeast late. waves
building to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.monday...southwest winds 10 to 20 knots backing south. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

$$