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(1/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 9/25/2026 4:01 AM America/New_York.
Valid through 9/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202609252000;;021227
open lake forecast for lake superior
national weather service marquette mi
401 am edt fri sep 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 30.4 inch high centered over quebec will weaken to 30.3 inches
today over the great lakes basin as a 29.4 inch low develops over
the northern rockies. on saturday the high begins shifting northeast
toward northern quebec while the low deepens and moves north through
the canadian prairies. sunday through monday, the high shifts east
to the canadian maritimes, weakening to 30.0 inches. this gradually
weakens ridging over lake superior from 30.1 inches sunday morning
to 29.9 inches by late monday as a 29.8 inch trough approaches from
the west. by tuesday evening the trough will move over lake superior
at around 29.7 inches.
lsz162-252000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt fri sep 25 2026 /301 am cdt fri sep 25 2026/
.early this morning...south winds less than 10 knots. waves calm
to 2 feet.
.today...southwest winds less than 10 knots veering north in the
afternoon, then becoming northeast 5 to 15 knots late. waves calm
to 2 feet.
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet.
.saturday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet.
.saturday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet.
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet.
.sunday night...north winds less than 10 knots. waves calm to
2 feet.
.monday...east winds 5 to 15 knots veering south. waves calm to
2 feet.
.tuesday...south winds 5 to 15 knots becoming west 10 to
20 knots. showers likely, then a chance of showers. waves calm to
2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 9/25/2026 4:01 AM America/New_York.
Valid through 9/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202609252000;;021228
open lake forecast for lake superior
national weather service marquette mi
401 am edt fri sep 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 30.4 inch high centered over quebec will weaken to 30.3 inches
today over the great lakes basin as a 29.4 inch low develops over
the northern rockies. on saturday the high begins shifting northeast
toward northern quebec while the low deepens and moves north through
the canadian prairies. sunday through monday, the high shifts east
to the canadian maritimes, weakening to 30.0 inches. this gradually
weakens ridging over lake superior from 30.1 inches sunday morning
to 29.9 inches by late monday as a 29.8 inch trough approaches from
the west. by tuesday evening the trough will move over lake superior
at around 29.7 inches.
lsz263-252000-
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 am edt fri sep 25 2026
.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet.
.today...southwest winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming northeast 5 to 15 knots
late. waves calm to 2 feet.
.tonight...east winds 5 to 15 knots. waves calm to 2 feet.
.saturday...southeast winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet.
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. a slight chance of showers after midnight. waves
calm to 2 feet.
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet.
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet.
.monday...southeast winds 5 to 15 knots veering south. waves calm
to 2 feet.
.tuesday...south winds 10 to 20 knots becoming southwest 5 to
15 knots. showers likely. waves calm to 2 feet.
$$
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