330
FZUS63 KMQT 270153
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
953 PM EDT Fri Apr 26 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...Lake Superior is currently situated between a broad
30.5 inch high over New England and a 29.3 inch low over the
Northern Plains. The low will track northeast, weakening to 29.6
inches by the time it reaches northeast Lake Superior on Saturday
evening. On Sunday, 30.4 inch high pressure will build over
northern Ontario as a 29.6 inch low pressure lifts northeast
across the Central Plains. This low will continue to track
northeast, crossing western Lake Superior late in the day Monday
at 29.7 inches. As the low moves over northern Ontario Monday
night, a weak 30.0 inch ridge will shift east across the
Mississippi Valley. On Tuesday, the ridge will shift toward the
Appalachians as the next low pressure of 29.5 inches tracks from
North Dakota to far northern Minnesota, passing north of Lake
Superior Wednesday.

LSZ162-271000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
953 PM EDT Fri Apr 26 2024 /853 PM CDT Fri Apr 26 2024/

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

.REST OF TONIGHT...East winds 15 to 25 knots backing northeast
late. Rain showers and a slight chance of thunderstorms. Waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing northwest late. Rain
showers through early afternoon. A slight chance of
thunderstorms. A chance of rain showers by mid afternoon. Waves
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight, then increasing to 15 to 25 knots late. A slight
chance of rain showers. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northeast gales to 45 knots. A chance of rain showers
through early afternoon, then rain showers by mid afternoon.
Waves building to 12 to 17 feet occasionally to 21 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots. Rain showers. Waves
subsiding to 9 to 12 feet occasionally to 15 feet.
.MONDAY...Northeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. Rain showers through early afternoon,
then a chance of rain showers by mid afternoon. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 10 to 20 knots veering west. A chance
of rain showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-271000-
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-
953 PM EDT Fri Apr 26 2024

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Southeast winds 10 to 20 knots backing east
after midnight. Rain showers likely and a slight chance of
thunderstorms. Waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...East winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon, then becoming west 10 to 20 knots
late. Rain showers likely through early afternoon. A slight
chance of thunderstorms. A chance of rain showers by mid
afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots veering northeast
late. A slight chance of rain showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 8 to 12 feet occasionally to 15 feet.
.SUNDAY NIGHT...East gales to 45 knots. Rain showers. Waves
subsiding to 6 to 9 feet occasionally to 11 feet, then building
to 10 to 14 feet occasionally to 18 feet.
.MONDAY...East gales to 40 knots. Rain showers. Waves subsiding
to 5 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ264-271000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
953 PM EDT Fri Apr 26 2024

...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Rain showers. Waves 4 to 7 feet
occasionally to 9 feet building to 6 to 9 feet occasionally to
11 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. Rain showers
likely through early afternoon. A slight chance of thunderstorms.
A chance of rain showers by mid afternoon. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots late. A slight chance of rain showers through midnight.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...East gales to 40 knots. Rain showers. Waves
building to 10 to 14 feet occasionally to 18 feet.
.MONDAY...East gales to 45 knots. Rain showers. Waves subsiding
to 5 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ265-271000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
953 PM EDT Fri Apr 26 2024

...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight, then diminishing to 15 to 25 knots
late. Rain showers likely. A slight chance of thunderstorms after
midnight. Waves 3 to 5 feet occasionally to 7 feet building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south in the
afternoon, then becoming west 15 to 25 knots late. A chance of
showers and a slight chance of thunderstorms. Waves subsiding to
2 to 4 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots veering north after
midnight. A slight chance of showers and thunderstorms through
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
subsiding to 2 to 4 feet.
.SUNDAY NIGHT...East gales to 35 knots. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.MONDAY...East winds 20 to 30 knots becoming southeast 15 to
25 knots by mid afternoon. Rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ266-271000-
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-
953 PM EDT Fri Apr 26 2024

...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Southeast winds 20 to 30 knots. A chance of
rain showers by late evening, then rain showers likely after
midnight. Waves 5 to 9 feet occasionally to 11 feet, then
building to 6 to 9 feet occasionally to 11 feet.
.SATURDAY...Southeast winds 20 to 30 knots becoming south 15 to
25 knots in the afternoon. A chance of rain showers and a slight
chance of thunderstorms. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots becoming north 20 to
30 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...Northeast winds 15 to 25 knots. A slight chance of rain
showers through early afternoon, then rain showers likely by mid
afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...East gales to 40 knots. Rain showers. Waves
building to 8 to 11 feet occasionally to 14 feet.
.MONDAY...East gales to 40 knots becoming southeast gales to
35 knots by mid afternoon. Rain showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming south 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 2 to 4 feet.

$$

LSZ267-271000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
953 PM EDT Fri Apr 26 2024

.REST OF TONIGHT...Southeast winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible late. A
chance of rain showers by late evening, then rain showers likely
after midnight. Waves 5 to 8 feet occasionally to 10 feet
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
6 to 9 feet occasionally to 11 feet.
.SATURDAY...Southeast winds to 30 knots with a few gale force
gusts to 35 knots possible becoming south 20 to 30 knots in the
afternoon, then diminishing to 15 to 25 knots late. Rain showers
likely through early afternoon. A slight chance of thunderstorms.
A chance of rain showers by mid afternoon. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then becoming north 15 to 25 knots late.
A chance of rain showers and a slight chance of thunderstorms
through midnight. Waves subsiding to 2 to 4 feet, then building
to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of rain showers
through early afternoon, then rain showers likely by mid
afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots. Rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...Southeast winds 20 to 30 knots. Rain showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...South winds 15 to 25 knots becoming west 10 to
20 knots after midnight. A chance of rain showers. Waves
subsiding to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 1 to 3 feet.

$$
LSZ261-271000-
MAFOR 2703/
Superior West 11226 13236 11126 11726 11720 11710. Waves 3 to 6
feet overnight subsiding to 2 to 4 feet Saturday and Saturday
evening.

Superior North Central 13346 11336 11320 11426 11620 11730. Waves
5 to 9 feet overnight subsiding to 3 to 6 feet Saturday and
Saturday evening.

Superior South Central 11336 11346 11336 12320 11420 11520 11630.
Waves 3 to 6 feet overnight and Saturday. Waves 2 to 4 feet
Saturday evening.

Superior East 11340 11346 12356 11330 12430 11630. Waves 5 to 8
feet overnight. Waves 5 to 9 feet subsiding to 4 to 6 feet
Saturday. Waves 3 to 5 feet Saturday evening.

$$

GS

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

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