Latest Great Lakes Marine Forecast by KMQT
Issued 11/1/2025 10:01 PM America/New_York.
Valid through 11/2/2025 3:00 AM America/New_York.
fzus63 kmqt 020201
glfls
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open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat nov 1 2025
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...
30.1 inch ridging persists over the lake through early sunday
morning as 30.2 inch high pressure shifts from the central plains to
the midwest. meanwhile, a 29.2 inch low moving across the canadian
prairie will reach hudson bay at 29.0 inches by monday morning,
pulling a 29.6 inch trough across lake superior sunday night into
monday. a 30.0 inch ridge then rebuilds over the lake on tuesday
associated with broad 30.2 inch high pressure over the us southeast.
a 29.8 to 29.9 inch low moves over lake michigan tuesday night. this
will be followed by a 30.2 inch high moving from the northern plains
to the the great lakes late wednesday.
lsz162-020800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat nov 1 2025 /901 pm cdt sat nov 1 2025/
...gale warning in effect from 9 am edt /8 am cdt/ sunday through
monday afternoon...
.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots late. waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet.
.sunday...southwest gales to 40 knots. a slight chance of rain
showers. waves building to 10 to 14 feet occasionally to 18 feet.
.sunday night...southwest gales to 40 knots becoming west gales
to 35 knots after midnight, then diminishing to 20 to 30 knots
late. a slight chance of showers through midnight. waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.monday...west winds 20 to 30 knots. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.monday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet.
.tuesday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet.
.tuesday night...west winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. waves calm to 2 feet.
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet.
.thursday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. a chance of rain showers. waves building to 1 to
3 feet.
$$
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