467
AXUS43 KMQT 202001
MISMQT

OPEN LAKE FORECAST FOR LAKE SUPERIOR FOR NOAA WEATHER RADIO
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT Mon Jul 20 2026

LSZ162-210800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Mon Jul 20 2026 /301 PM CDT Mon Jul 20 2026/

.LATE THIS AFTERNOON...West winds 20 to 30 knots. Patchy smoke. A
slight chance of showers and thunderstorms. Some thunderstorms
may be severe. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots. Patchy smoke through
midnight. A slight chance of showers and thunderstorms after
midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then veering north late. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots becoming southwest
10 to 20 knots by mid afternoon. Waves calm to 2 feet.
$$

LSZ263-210800-
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 Mon Jul 20 2026

.LATE THIS AFTERNOON...West winds 20 to 30 knots. Patchy smoke. A
chance of showers and thunderstorms. Some thunderstorms may be
severe. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Patchy smoke through midnight. A chance
of showers. A slight chance of thunderstorms after midnight.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots veering north late.
Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Patchy smoke through midnight.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing southwest by
mid afternoon. Waves building to 1 to 3 feet.
$$

LSZ264-210800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Mon Jul 20 2026

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of showers and thunderstorms. Some thunderstorms may be severe.
Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 15 to 25 knots. Patchy smoke through
midnight. A slight chance of thunderstorms through midnight. A
chance of showers. Some thunderstorms may be severe. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. 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.
.TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
$$

LSZ265-210800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Mon Jul 20 2026

...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. A chance of
showers and thunderstorms. Some thunderstorms may be severe.
Waves 2 to 4 feet.
.TONIGHT...Southwest winds 20 to 30 knots veering west after
midnight, then increasing to gales to 35 knots late. A slight
chance of thunderstorms through midnight. A chance of showers.
Some thunderstorms may be severe. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Northwest gales to 40 knots. A slight chance of
showers through early afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.TUESDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots late. Patchy smoke after midnight. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. Waves subsiding to calm to 2 feet.
$$

LSZ266-210800-
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 Mon Jul 20 2026

...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Patchy smoke.
A chance of showers and thunderstorms. Some thunderstorms may be
severe. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...South winds 15 to 25 knots veering west after
midnight, then increasing to 20 to 30 knots late. A chance of
thunderstorms through midnight. A chance of showers. Some
thunderstorms may be severe. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest gales to 40 knots. A slight chance of
showers through early afternoon. Waves building to 8 to 12 feet
occasionally to 15 feet.
.TUESDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots late. A slight chance of showers through midnight. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
$$

LSZ267-210800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Mon Jul 20 2026

...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. A chance of
showers and thunderstorms. Waves 3 to 5 feet occasionally to
7 feet.
.TONIGHT...South winds 15 to 25 knots veering west late. A chance
of thunderstorms through midnight. A chance of showers. Some
thunderstorms may be severe. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 20 to 30 knots becoming northwest gales to
40 knots in the afternoon. A chance of showers. Waves building to
8 to 12 feet occasionally to 15 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots. A slight chance of
showers through midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
$$