915
AXUS43 KMQT 212001
MISMQT

OPEN LAKE FORECAST FOR LAKE SUPERIOR FOR NOAA WEATHER RADIO
NATIONAL WEATHER SERVICE MARQUETTE MI
400 PM EDT Fri Aug 21 2026

LSZ162-220800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Fri Aug 21 2026 /301 PM CDT Fri Aug 21 2026/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots becoming northwest 10 to
20 knots late. A slight chance of showers and thunderstorms.
Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west late.
Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...North winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
$$

LSZ263-220800-
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 Aug 21 2026

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight, then becoming northwest 10 to 20 knots late. A slight
chance of showers and thunderstorms. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots becoming west 5 to 15 knots
by mid afternoon. Waves building to 2 to 4 feet, then subsiding
to calm to 2 feet.
$$

LSZ264-220800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Fri Aug 21 2026

.LATE THIS AFTERNOON...Northwest winds less than 10 knots. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late. Waves
calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots late. Waves building to 2 to 4 feet.
.SUNDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
$$

LSZ265-220800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Fri Aug 21 2026

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. A slight
chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing west after
midnight, then increasing to 15 to 25 knots late. Waves calm to
2 feet.
.SATURDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of showers through
early afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots veering north
after midnight. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SUNDAY...North winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
$$

LSZ266-220800-
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 Aug 21 2026

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots veering north
after midnight. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SUNDAY...North winds 20 to 30 knots backing northwest by mid
afternoon. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
$$

LSZ267-220800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Fri Aug 21 2026

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Showers likely
and a chance of thunderstorms. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots becoming northwest 10 to
20 knots after midnight. A slight chance of thunderstorms through
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots veering north
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.SUNDAY...North winds 20 to 30 knots backing northwest by mid
afternoon. Waves building to 4 to 8 feet occasionally to 10 feet.
$$