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000
FZUS63 KMQT 260142
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
942 PM EDT Thu Apr 25 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... This evening 30.4 ridging extends across central and
southern Quebec back into the Great Lakes region. During tonight
and Friday, the ridge, at 30.5 inches, shifts to New England and
the Maritime Provinces while low pressure of 29.2 inches lifts
from eastern Colorado into Nebraska. This low continues to 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 builds over far northern Ontario as a 29.6 inch low
pressure lifts northeast across the Central Plains. This low
continues to track northeast, crossing Lake Superior Monday. In
its wake, a 30.0 inch ridge shifts east across the Mississippi
Valley Monday night into the Lower Great Lakes Tuesday.

LSZ162-260945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
942 PM EDT Thu Apr 25 2024 /842 PM CDT Thu Apr 25 2024/

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

$$

LSZ263-260945-
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-
942 PM EDT Thu Apr 25 2024

.REST OF TONIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. A slight chance of rain showers by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots backing east after
midnight. A chance of rain showers through midnight, then rain
showers likely and a slight chance of thunderstorms after
midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...East winds 10 to 20 knots backing north by mid
afternoon. Rain showers and a slight chance of thunderstorms.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots. A chance of rain
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...Northeast gales to 35 knots. A chance of rain showers
through early afternoon, then rain showers likely by mid
afternoon. Waves building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...East gales to 35 knots diminishing to 20 to
30 knots after midnight. Rain showers. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.MONDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers likely. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ264-260945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
942 PM EDT Thu Apr 25 2024

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

$$

LSZ265-260945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
942 PM EDT Thu Apr 25 2024

.REST OF TONIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves 2 to 4 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots. Rain showers
likely. A slight chance of thunderstorms after midnight. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south by mid
afternoon. Rain showers and a slight chance of thunderstorms.
Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
15 to 25 knots after midnight. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots. A 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 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.MONDAY...Southeast winds 15 to 25 knots veering west. Rain
showers likely. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of rain showers. Waves calm to 2 feet.

$$

LSZ266-260945-
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-
942 PM EDT Thu Apr 25 2024

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

$$

LSZ267-260945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
942 PM EDT Thu Apr 25 2024

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

$$
LSZ261-260945-
MAFOR 2603/
Superior West 11320 11420 12320 11210 11220 11230 11336. Waves 1
to 3 feet overnight and Friday. Waves 2 to 4 feet Friday evening.

Superior North Central 11320 12420 11330 14340. A chance of
showers Friday evening. Waves 2 to 4 feet overnight. Waves 3 to 6
feet building to 4 to 7 feet Friday and Friday evening.

Superior South Central 13420 12330 11340 12330. A chance of
showers Friday evening. Waves 2 to 5 feet overnight through
Friday evening.

Superior East 12420 11320 12330 11340 12350. Waves 2 to 3 feet
overnight building to 3 to 5 feet Friday. Waves 5 to 8 feet
Friday evening.

$$

BW

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

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