164
FZUS63 KMQT 300147
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
947 PM EDT Mon Apr 29 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...A 29.8 inch low pressure is currently over Lake
Superior tonight and will exit into Ontario Tuesday morning.
During Tuesday afternoon and evening, a weak high pressure ridge
of 29.9 inches will shift east across Lake Superior while a low
pressure trough of 29.6 inches moves from the western Plains to
Minnesota and Iowa. This trough will weaken to 29.7 inches as it
sails across Lake Superior on Wednesday. As a 30.0 inch ridge then
shifts east across the western Great Lakes during Wednesday
night, a 29.3 inch Colorado Low will lift out over the Plains
while weakening to 29.5 inches. This low will then track to the
Upper Mississippi Valley on Thursday and into northwestern Ontario
on Friday. As the low reaches the Hudson Bay shores Saturday
afternoon at 29.6 inches, a ridge of 30.1 inches builds over Lake
Huron.

LSZ162-301000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
947 PM EDT Mon Apr 29 2024 /847 PM CDT Mon Apr 29 2024/

.REST OF TONIGHT...Northeast winds 10 to 20 knots backing north
after midnight, then backing west late. Patchy fog by late
evening. A chance of rain showers. Waves 5 to 8 feet occasionally
to 10 feet subsiding to 2 to 4 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots increasing to 15 to
25 knots after midnight, then becoming northeast 10 to 20 knots
late. A chance of rain showers through midnight, then rain
showers after midnight. Waves building to 2 to 4 feet.
.WEDNESDAY...West winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers through early
afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of drizzle through early
afternoon. A chance of rain showers. Waves building to 5 to
8 feet occasionally to 10 feet.
.THURSDAY NIGHT...Northeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A
chance of rain showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 15 to 25 knots veering west. A chance
of rain showers. Waves building to 2 to 4 feet, then subsiding to
calm to 2 feet.

$$

LSZ263-301000-
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-
947 PM EDT Mon Apr 29 2024

.REST OF TONIGHT...East winds 15 to 25 knots becoming west 10 to
20 knots after midnight. Patchy fog by late evening. Areas of fog
after midnight. A chance of rain showers. Waves 5 to 8 feet
occasionally to 10 feet subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing southwest late. Waves subsiding to
calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of rain showers through
midnight, then rain showers after midnight. Waves building to
2 to 4 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers
through early afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers. Waves
building to 2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers and thunderstorms.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A
chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to 1 to 3 feet.

$$

LSZ264-301000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
947 PM EDT Mon Apr 29 2024

.REST OF TONIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. Patchy fog
by late evening. Areas of fog after midnight. A chance of rain
showers. Waves 5 to 8 feet occasionally to 10 feet subsiding to 3
to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots late. Areas of fog through early afternoon. A slight
chance of rain showers and drizzle through early afternoon. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds less than 10 knots becoming east
5 to 15 knots after midnight, then becoming southeast 15 to
25 knots late. A chance of rain showers after midnight. Waves
building to 2 to 4 feet.
.WEDNESDAY...South winds 15 to 25 knots veering west by mid
afternoon. A chance of rain showers. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots. A chance of rain
showers. Waves building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A
chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves 2 to 4 feet.

$$

LSZ265-301000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
947 PM EDT Mon Apr 29 2024

.REST OF TONIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight, then becoming west 10 to 20 knots
late. Areas of fog. A chance of rain showers. Waves 4 to 7 feet
occasionally to 9 feet subsiding to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Areas of fog through early afternoon. A slight chance of
drizzle through early afternoon. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
15 to 25 knots. Rain showers likely after midnight. Waves
building to 2 to 4 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots. Showers likely and a
chance of thunderstorms. Waves building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of drizzle. A chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.

$$

LSZ266-301000-
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-
947 PM EDT Mon Apr 29 2024

.REST OF TONIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots after midnight, then veering southwest late.
Patchy fog by late evening. Areas of fog after midnight. A chance
of rain showers. Waves 5 to 8 feet occasionally to 10 feet
subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Patchy fog through early afternoon. A slight chance of
drizzle through early afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. A chance of
rain showers after midnight. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots. Showers likely and a
chance of thunderstorms. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. A chance
of drizzle. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet.

$$

LSZ267-301000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
947 PM EDT Mon Apr 29 2024

.REST OF TONIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering south late. Patchy
fog by late evening. Areas of fog after midnight. A chance of
rain showers. Waves 2 to 4 feet subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Patchy fog through early afternoon. A slight chance of rain
showers through early afternoon. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots backing southeast
after midnight, then increasing to 10 to 20 knots late. A chance
of rain showers after midnight. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots veering southwest by
mid afternoon. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...East winds 10 to 20 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Showers likely and a chance of
thunderstorms. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. A chance
of drizzle. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.SATURDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.

$$
LSZ261-301000-
MAFOR 3003/
Superior West 11824 11714 11610 11620 11610 11510 11400 11200. A
chance of rain showers late this evening. Waves 4 to 7 feet
subsiding to 3 to 5 feet overnight. Waves 1 to 4 feet Tuesday and
Tuesday evening.

Superior North Central 11236 11324 11524 11624 11720 11620 11610
11500. Waves 5 to 8 feet overnight. Waves 3 to 5 feet subsiding
to 1 to 4 feet Tuesday and Tuesday evening.

Superior South Central 11314 11414 11620 11630 19634 12620 11800
11200. A chance of rain showers overnight. Waves 3 to 6 feet
subsiding to 1 to 4 feet overnight and Tuesday. Waves 2 feet or
less Tuesday evening.

Superior East 11336 11324 11414 11510 12620 11610 11500. Waves 3
to 5 feet subsiding to 1 to 4 feet overnight, Tuesday, and
Tuesday evening.

$$

GS

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