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Latest Great Lakes Marine Forecast by KMQT
Issued 5/6/2026 10:01 PM America/New_York.
Valid through 5/7/2026 4:00 AM America/New_York.
fzus63 kmqt 070201
glfls
expires:202605070800;;137530
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed may 6 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...
expect weak high pressure ridging of 29.9 inches over lake superior
tonight with 30.1 inch ridging upstream over the canadian prairies
and southern plains. by thursday afternoon, lake superior is
projected to be between a 29.4 inch low over hudson bay, a 29.4 inch
low over the mouth of the st. lawrence river, a low of 29.7 inches
over the black hills, a high of 30.1 inches over oklahoma, and a
weak 29.9 inch high over the saskatchewan/manitoba line. the hudson
bay and black hills lows work to pass a 29.7 inch trough over lake
superior friday, strengthening to 29.6 inches by friday night into
saturday before the lows consolidate over western quebec by late
saturday. high pressure ridging builds back up to 30.1 inches over
lake superior by sunday as the parent high strengthens over the
canadian prairies and northern plains.
lsz162-070800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed may 6 2026 /901 pm cdt wed may 6 2026/
.rest of tonight...west winds 5 to 15 knots. waves calm to
2 feet.
.thursday...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet.
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.friday night...west winds 5 to 15 knots. a slight chance of rain
showers after midnight. waves calm to 2 feet.
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.saturday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet.
.sunday...west winds 5 to 15 knots veering north. waves calm to
2 feet.
.monday...south winds 5 to 15 knots backing east. waves calm to
2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/6/2026 10:01 PM America/New_York.
Valid through 5/7/2026 4:00 AM America/New_York.
fzus63 kmqt 070201
glfls
expires:202605070800;;137531
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed may 6 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...
expect weak high pressure ridging of 29.9 inches over lake superior
tonight with 30.1 inch ridging upstream over the canadian prairies
and southern plains. by thursday afternoon, lake superior is
projected to be between a 29.4 inch low over hudson bay, a 29.4 inch
low over the mouth of the st. lawrence river, a low of 29.7 inches
over the black hills, a high of 30.1 inches over oklahoma, and a
weak 29.9 inch high over the saskatchewan/manitoba line. the hudson
bay and black hills lows work to pass a 29.7 inch trough over lake
superior friday, strengthening to 29.6 inches by friday night into
saturday before the lows consolidate over western quebec by late
saturday. high pressure ridging builds back up to 30.1 inches over
lake superior by sunday as the parent high strengthens over the
canadian prairies and northern plains.
lsz263-070800-
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 wed may 6 2026
.rest of tonight...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to calm to 2 feet.
.thursday...west winds 5 to 15 knots backing southwest late.
waves building to 1 to 3 feet.
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves subsiding to calm to 2 feet.
.friday...southwest winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves subsiding to calm to 2 feet.
.saturday...west winds 5 to 15 knots. waves building to 1 to
3 feet.
.saturday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet.
.sunday...west winds 5 to 15 knots veering north. waves calm to
2 feet.
.monday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet.
$$
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