478
AXUS43 KMQT 172001
MISMQT

OPEN LAKE FORECAST FOR LAKE SUPERIOR FOR NOAA WEATHER RADIO
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT Fri Oct 17 2025

LSZ162-180800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Fri Oct 17 2025 /301 PM CDT Fri Oct 17 2025/

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A slight
chance of showers. Waves 1 to 3 feet.
.TONIGHT...Southwest 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.
.SATURDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of showers. Waves
building to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
$$

LSZ263-180800-
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-
401 PM EDT Fri Oct 17 2025

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A slight
chance of showers. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. A slight chance of showers through midnight. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west in the
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots increasing to
15 to 25 knots. A slight chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 20 to 30 knots. A slight chance of
showers through early afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
$$

LSZ264-180800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Fri Oct 17 2025

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A chance of
showers and a slight chance of thunderstorms. Waves 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots veering southwest after
midnight, then diminishing to 10 to 20 knots late. A chance of
showers through midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 20 to 30 knots. A slight chance of
showers through early afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
$$

LSZ265-180800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Fri Oct 17 2025

.LATE THIS AFTERNOON...South winds 15 to 25 knots. A slight
chance of showers and thunderstorms. Waves 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots becoming southwest 10 to
20 knots after midnight. A chance of showers and a slight chance
of thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon, then veering northeast late. Waves
calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight, then becoming northwest 15 to
25 knots late. A chance of showers. Waves building to 2 to
4 feet.
.SUNDAY...Northwest gales to 35 knots. A chance of showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
$$

LSZ266-180800-
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-
401 PM EDT Fri Oct 17 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. A slight
chance of showers and thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...South winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
A slight chance of thunderstorms through midnight. A chance of
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. A slight
chance of showers by mid afternoon. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots becoming north
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. A chance of showers through midnight, then showers likely
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...North gales to 35 knots backing northwest by mid
afternoon. A chance of showers. Waves building to 8 to 11 feet
occasionally to 14 feet.
$$

LSZ267-180800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Fri Oct 17 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming southwest 10 to 20 knots
late. Showers likely and a slight chance of thunderstorms through
midnight, then a chance of showers after midnight. Waves building
to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet.
.SATURDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering north late. A slight
chance of showers. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight, then becoming north 10 to 20 knots late. A chance
of showers through midnight, then showers likely after midnight.
Waves building to 1 to 3 feet.
.SUNDAY...North winds 20 to 30 knots becoming northwest gales to
35 knots by mid afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 8 to 12 feet occasionally to 15 feet.
$$