058
FZUS63 KMQT 171959
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 PM EDT Tue Sep 17 2024

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...Through Wednesday, a 30.1 inch high will be located
over the Northeast while a 29.3 inch low develops over the
northern Plains. This low will track into the Canadian Prairies
and Hudson Bay through Friday while a 29.9 inch ridge extends fro
the Northeast into the lower Great Lakes. On the weekend, a 29.9
inch low will pass across Manitoba and Ontario, pushing a cold
front across Lake Superior.

LSZ162-180400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 PM EDT Tue Sep 17 2024 /259 PM CDT Tue Sep 17 2024/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots veering south after midnight.
A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering southeast late. Waves calm
to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of showers
and a slight chance of thunderstorms. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots. Showers likely
through midnight. A chance of thunderstorms. A chance of showers
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots becoming north 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 15 to 25 knots becoming north 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-180400-
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-
359 PM EDT Tue Sep 17 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. A slight chance of showers and thunderstorms after
midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east late. A
slight chance of showers through early afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
late. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. A slight chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots. Showers likely and
a chance of thunderstorms. Waves building to 1 to 3 feet.
.FRIDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A chance of showers. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ264-180400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 PM EDT Tue Sep 17 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. A slight chance of showers after midnight. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast late.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY...South winds 5 to 15 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ265-180400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 PM EDT Tue Sep 17 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then veering south late. Waves calm
to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. Showers likely and a chance of thunderstorms. Waves
calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ266-180400-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
359 PM EDT Tue Sep 17 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves calm to
2 feet building to 1 to 3 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing southeast late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers through early afternoon. Showers
likely by mid afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots. A chance of showers. Waves
1 to 3 feet.

$$

LSZ267-180400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 PM EDT Tue Sep 17 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming southeast 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ261-180400-
MAFOR 1721/
Superior West 11210 11310 14410 11400 11300. Waves 1 to 2 feet.

Superior North Central 11310 11320 12420 11410 12400 11300. Waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3
feet tonight. Waves 1 to 3 feet Wednesday.

Superior South Central 11320 12420 12410 12400 11310. Waves 1 to
3 feet tonight. Waves 2 feet or less Wednesday.

Superior East 11310 13420 13410 11300. Waves 1 to 3 feet.

$$

Thompson

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes