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Latest Great Lakes Marine Forecast by KMQT
Issued 5/25/2026 10:01 PM America/New_York.
Valid through 5/26/2026 4:00 AM America/New_York.
fzus63 kmqt 260201
glfls
expires:202605260800;;652684
open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon may 25 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 29.6 inch low over northern ontario drags a 29.8 inch trough
across lake superior tonight. by tuesday night, a 30.4 inch high
over the western shores of hudson bay extends weak ridging of 30.1
inches over lake superior. the parent high shifts south over the
lake on thursday at 30.3 inches. on friday, the high weakens to
around 30.1 inches as it continues south towards chicago. however,
another ridge pushing in from hudson bay brings 30.1 inch ridging
back over lake superior late on friday, with the ridging increasing
once again to 30.3 inches by saturday as the parent high over hudson
bay pushes south.
lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt mon may 25 2026 /900 pm cdt mon may 25 2026/
.rest of tonight...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight, then veering west late. a slight
chance of showers by midnight. waves calm to 2 feet.
.tuesday...north winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet.
.tuesday night...northeast winds 5 to 15 knots. waves calm to
2 feet.
.wednesday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet.
.wednesday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet.
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday night...north winds less than 10 knots becoming west
5 to 15 knots after midnight. waves calm to 2 feet.
.friday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet.
.saturday...northeast winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/25/2026 10:01 PM America/New_York.
Valid through 5/26/2026 4:00 AM America/New_York.
fzus63 kmqt 260201
glfls
expires:202605260800;;652685
open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon may 25 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 29.6 inch low over northern ontario drags a 29.8 inch trough
across lake superior tonight. by tuesday night, a 30.4 inch high
over the western shores of hudson bay extends weak ridging of 30.1
inches over lake superior. the parent high shifts south over the
lake on thursday at 30.3 inches. on friday, the high weakens to
around 30.1 inches as it continues south towards chicago. however,
another ridge pushing in from hudson bay brings 30.1 inch ridging
back over lake superior late on friday, with the ridging increasing
once again to 30.3 inches by saturday as the parent high over hudson
bay pushes south.
lsz263-260800-
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 mon may 25 2026
.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then becoming west 5 to 15 knots
late. a slight chance of thunderstorms by midnight. a chance of
rain showers. waves calm to 2 feet building to 1 to 3 feet.
.tuesday...north winds 5 to 15 knots veering south in the
afternoon, then backing east late. waves subsiding to calm to
2 feet.
.tuesday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet.
.wednesday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet.
.wednesday night...northeast winds 5 to 15 knots becoming east
less than 10 knots after midnight. waves subsiding to calm to
2 feet.
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet.
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet.
.saturday...northeast winds 5 to 15 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
$$
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