fzus63 kmqt 272001
glfls 
expires:202605280800;;750001

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 27 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... 

ridging of 30.2 inches persists over lake superior today, extending 
from a 30.3 inch high centered over hudson bay. on thursday, this 
parent high shifts southward over the lake at 30.3 inches. the high 
center weakens to around 30.1 inches on friday as it continues its 
southerly propagation towards lower michigan, causing pressure to 
decrease to 29.9 inches over lake superior. following this, a second 
ridge pushing in from hudson bay brings 30.1 inch ridging back over 
the lake late on friday. pressure subsequently increases to 30.3 
inches by saturday midday as this second parent high over hudson bay 
propagates south. high pressure persists over lake superior through 
early next week.



lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed may 27 2026 /301 pm cdt wed may 27 2026/

.late this afternoon...northeast winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing northeast in the
afternoon. waves calm to 2 feet. 
.thursday night...north winds less than 10 knots increasing to
5 to 15 knots after midnight, then backing southwest late. waves
calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. a slight chance of
showers and thunderstorms by mid afternoon. waves calm to 2 feet.
.friday night...east winds 5 to 15 knots becoming northeast 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...northeast winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 272001
glfls 
expires:202605280800;;750002

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 27 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... 

ridging of 30.2 inches persists over lake superior today, extending 
from a 30.3 inch high centered over hudson bay. on thursday, this 
parent high shifts southward over the lake at 30.3 inches. the high 
center weakens to around 30.1 inches on friday as it continues its 
southerly propagation towards lower michigan, causing pressure to 
decrease to 29.9 inches over lake superior. following this, a second 
ridge pushing in from hudson bay brings 30.1 inch ridging back over 
the lake late on friday. pressure subsequently increases to 30.3 
inches by saturday midday as this second parent high over hudson bay 
propagates south. high pressure persists over lake superior through 
early next week.



lsz263-280800-
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-
401 pm edt wed may 27 2026

.late this afternoon...east winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...northeast winds 5 to 15 knots diminishing to less than
10 knots late. waves subsiding to calm to 2 feet. 
.thursday...east winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.thursday night...northeast winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. a slight chance of
showers and thunderstorms by mid afternoon. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.friday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots backing northeast by mid
afternoon. waves 2 to 4 feet. 
.saturday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$