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(1/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/14/2026 10:01 PM America/New_York.
Valid through 8/15/2026 4:00 AM America/New_York.
fzus63 kmqt 150201
glfls
expires:202608150800;;205846
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt fri aug 14 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...
30.2 inch high pressure over lake superior eventually gives way to a
29.9 inch low by tomorrow night as the aforementioned high moves
east towards new england. this low deepens to 29.8 inches as it
reaches the lower great lakes by sunday afternoon. sunday night into
monday, a 30.1 inch high over the plains weakens to 30.0 inches as
it slides generally south of lake superior. by tuesday, this high
becomes centered south of the great lakes as a 29.4 inch low over
hudson bay extends a 29.8 inch trough over lake superior. a second
29.7 inch low moves through the great lakes region into southern
ontario on wednesday.
lsz162-150800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt fri aug 14 2026 /901 pm cdt fri aug 14 2026/
.rest of tonight...northeast winds 10 to 20 knots veering east
late. waves 1 to 3 feet subsiding to calm to 2 feet.
.saturday...east winds 10 to 20 knots backing northeast late. a
chance of showers. waves calm to 2 feet.
.saturday night...northeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then backing west late. a slight
chance of showers through midnight. waves calm to 2 feet.
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves calm to 2 feet.
.sunday night...northwest winds 5 to 15 knots. waves calm to
2 feet.
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet.
.monday night...southwest winds 5 to 15 knots veering west after
midnight. a chance of showers. waves calm to 2 feet.
.tuesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet.
.wednesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/14/2026 10:01 PM America/New_York.
Valid through 8/15/2026 4:00 AM America/New_York.
fzus63 kmqt 150201
glfls
expires:202608150800;;205847
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt fri aug 14 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...
30.2 inch high pressure over lake superior eventually gives way to a
29.9 inch low by tomorrow night as the aforementioned high moves
east towards new england. this low deepens to 29.8 inches as it
reaches the lower great lakes by sunday afternoon. sunday night into
monday, a 30.1 inch high over the plains weakens to 30.0 inches as
it slides generally south of lake superior. by tuesday, this high
becomes centered south of the great lakes as a 29.4 inch low over
hudson bay extends a 29.8 inch trough over lake superior. a second
29.7 inch low moves through the great lakes region into southern
ontario on wednesday.
lsz263-150800-
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 fri aug 14 2026
.rest of tonight...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet.
.saturday...east winds 5 to 15 knots. a chance of showers by mid
afternoon. waves calm to 2 feet.
.saturday night...east winds 5 to 15 knots backing northwest
after midnight, then backing west late. a chance of showers and a
slight chance of thunderstorms through midnight. waves calm to
2 feet.
.sunday...west winds 10 to 20 knots. a slight chance of showers
through early afternoon. waves calm to 2 feet.
.sunday night...west winds 5 to 15 knots. waves calm to 2 feet.
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet.
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a chance of showers. waves subsiding to calm to 2 feet.
.tuesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet.
.wednesday...north winds 5 to 15 knots backing west. waves calm
to 2 feet.
$$
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