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(1/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/9/2026 4:01 AM America/New_York.
Valid through 8/9/2026 4:00 PM America/New_York.
fzus63 kmqt 090801
glfls
expires:202608092000;;870982
open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...
upper michigan is situated between a 29.6 inch hudson bay low and a
30.0 inch high centered over the ohio river valley. this will drive
weak and ill-defined 29.9 inch ridging/troughing over lake superior
today through monday night as the high moves southeast. weak ridging
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0
inch ridging over western canada returns for tuesday before
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves
over the lake wednesday before ridging of 30.0 inches returns on
thursday from the canadian prairie.
lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun aug 9 2026 /300 am cdt sun aug 9 2026/
.early this morning...west winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet.
.today...west winds 5 to 15 knots backing southwest in the
afternoon. a chance of showers through early afternoon. patchy
fog. waves calm to 2 feet.
.tonight...southwest winds 5 to 15 knots veering west after
midnight. patchy fog. waves calm to 2 feet.
.monday...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet.
.monday night...west winds 5 to 15 knots becoming north less than
10 knots after midnight. waves calm to 2 feet.
.tuesday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight. a chance of showers. waves calm to 2 feet.
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet.
.thursday...southwest winds 5 to 15 knots veering north. waves
calm to 2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/9/2026 4:01 AM America/New_York.
Valid through 8/9/2026 4:00 PM America/New_York.
fzus63 kmqt 090801
glfls
expires:202608092000;;870983
open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...
upper michigan is situated between a 29.6 inch hudson bay low and a
30.0 inch high centered over the ohio river valley. this will drive
weak and ill-defined 29.9 inch ridging/troughing over lake superior
today through monday night as the high moves southeast. weak ridging
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0
inch ridging over western canada returns for tuesday before
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves
over the lake wednesday before ridging of 30.0 inches returns on
thursday from the canadian prairie.
lsz263-092000-
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-
400 am edt sun aug 9 2026
.early this morning...west winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet.
.today...southwest winds 5 to 15 knots veering west in the
afternoon, then backing southwest late. a chance of showers
through early afternoon. patchy fog. waves calm to 2 feet.
.tonight...southwest winds 5 to 15 knots diminishing to less than
10 knots after midnight. patchy fog. waves calm to 2 feet.
.monday...west winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. patchy fog
through early afternoon. waves calm to 2 feet.
.monday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet.
.tuesday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.tuesday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet.
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet.
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet.
$$
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