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(1/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 4/30/2026 10:01 PM America/New_York.
Valid through 6/1/2026 4:00 AM America/New_York.
fzus63 kmqt 010201
glfls
expires:202606010800;;978814
open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun may 31 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 high pressure of 30.4 inches approaches the area from hudson bay
tonight through monday, becoming centered over the great lakes by
tuesday morning. the high weakens to 30.3 inches for tuesday night,
then moves southeast to the ohio river valley on wednesday.
meanwhile, a 29.9 inch trough approaches from the northwest, moving
over lake superior on thursday. this trough remains over the lake
through friday.
lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sun may 31 2026 /900 pm cdt sun may 31 2026/
.rest of tonight...east winds less than 10 knots backing
northeast after midnight, then increasing to 5 to 15 knots late.
waves calm to 2 feet.
.monday...northeast winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet.
.monday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots late. waves subsiding to calm to 2 feet.
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet.
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet.
.wednesday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet.
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. a chance of showers. waves calm to 2 feet.
.thursday...southwest winds 5 to 15 knots becoming west 10 to
20 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.friday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMQT
Issued 4/30/2026 10:01 PM America/New_York.
Valid through 6/1/2026 4:00 AM America/New_York.
fzus63 kmqt 010201
glfls
expires:202606010800;;978815
open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun may 31 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 high pressure of 30.4 inches approaches the area from hudson bay
tonight through monday, becoming centered over the great lakes by
tuesday morning. the high weakens to 30.3 inches for tuesday night,
then moves southeast to the ohio river valley on wednesday.
meanwhile, a 29.9 inch trough approaches from the northwest, moving
over lake superior on thursday. this trough remains over the lake
through friday.
lsz263-010800-
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-
1000 pm edt sun may 31 2026
.rest of tonight...east winds less than 10 knots becoming
northeast 5 to 15 knots after midnight. waves calm to 2 feet.
.monday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 2 to 4 feet.
.monday night...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet.
.tuesday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.tuesday night...east winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet.
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet.
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. a chance of showers after midnight. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.thursday...southwest winds 10 to 20 knots veering west. a chance
of showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.friday...west winds 5 to 15 knots backing east. waves subsiding
to calm to 2 feet.
$$
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