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Latest Great Lakes Marine Forecast by KMQT
Issued 7/3/2025 10:02 PM America/New_York.
Valid through 7/4/2025 4:00 AM America/New_York.
fzus63 kmqt 040202
glfls
expires:202507040800;;837630
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 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...
30.0 inch ridging is centered over the great lakes tonight. by
friday morning, the ridging will build to 30.1 inches as it shifts
over southern ontario and the lower great lakes while a 29.4 inch
low over northern saskatchewan drapes a trough of 29.7 inches over
the northern great plains. by saturday, the ridge will shift over
the east coast and the low moves over hudson bay, pressing troughing
of 29.8 inches over lake superior. the trough then lingers over the
lake through sunday morning, with 30.1 inch high pressure building
over the plains. this high moves over the great lakes basin for the
early portions of next week.
lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu jul 3 2025 /901 pm cdt thu jul 3 2025/
.rest of tonight...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms after midnight. waves calm to 2 feet.
.friday...east winds 10 to 20 knots. scattered showers and
thunderstorms through early afternoon. waves calm to 2 feet.
.friday night...northeast winds 10 to 20 knots veering south
after midnight. scattered showers through midnight. scattered
thunderstorms. showers likely after midnight. waves calm to
2 feet.
.saturday...southwest winds 10 to 20 knots veering west by mid
afternoon. showers and a chance of thunderstorms. waves calm to
2 feet.
.saturday night...northwest winds 10 to 20 knots veering north
after midnight. a chance of showers and a slight chance of
thunderstorms through midnight. waves calm to 2 feet.
.sunday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.sunday night...northeast winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet.
.monday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet.
.tuesday...east winds 5 to 15 knots backing northeast. a chance
of showers. waves calm to 2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 7/3/2025 10:02 PM America/New_York.
Valid through 7/4/2025 4:00 AM America/New_York.
fzus63 kmqt 040202
glfls
expires:202507040800;;837631
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 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...
30.0 inch ridging is centered over the great lakes tonight. by
friday morning, the ridging will build to 30.1 inches as it shifts
over southern ontario and the lower great lakes while a 29.4 inch
low over northern saskatchewan drapes a trough of 29.7 inches over
the northern great plains. by saturday, the ridge will shift over
the east coast and the low moves over hudson bay, pressing troughing
of 29.8 inches over lake superior. the trough then lingers over the
lake through sunday morning, with 30.1 inch high pressure building
over the plains. this high moves over the great lakes basin for the
early portions of next week.
lsz263-040800-
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 thu jul 3 2025
.rest of tonight...southeast winds 5 to 15 knots veering south
late. haze after midnight. waves calm to 2 feet.
.friday...south winds 5 to 15 knots. scattered thunderstorms
through early afternoon. scattered showers. waves calm to 2 feet.
.friday night...south winds 10 to 20 knots. a chance of showers
and thunderstorms. waves calm to 2 feet.
.saturday...southwest winds 5 to 15 knots veering west by mid
afternoon. showers and a chance of thunderstorms. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.saturday night...west winds 5 to 15 knots veering north after
midnight. a slight chance of thunderstorms through midnight. a
chance of showers. waves calm to 2 feet.
.sunday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet.
.sunday night...northeast winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet.
.monday...west winds 5 to 15 knots backing south. waves calm to
2 feet.
.tuesday...south winds 5 to 15 knots veering west. a chance of
showers. waves calm to 2 feet.
$$
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