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000
FZUS63 KMQT 232000
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
Issued by National Weather Service Gaylord MI
400 PM EDT Tue Apr 23 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...30.3 inch high pressure over northern Ontario will
build southeast and into the Great Lakes region Wednesday...and
remain in place over the lower Lakes Thursday. A 29.2 inch low
will develop over western portions of Kansas by Friday morning and
track northeast toward Lake Superior on Saturday (weakening to
29.4 inches).

LSZ162-240400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Tue Apr 23 2024 /300 PM CDT Tue Apr 23 2024/

.LATE THIS AFTERNOON...East winds 15 to 25 knots. Isolated rain
showers. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...East winds 10 to 20 knots backing northeast after
midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots. Waves building to 2 to
4 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...East winds 20 to 30 knots becoming northeast
15 to 25 knots after midnight. Rain. Waves 2 to 4 feet.
.SATURDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots. Rain. A chance of rain. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Northeast gales to 35 knots diminishing to 20 to
30 knots. A chance of rain, then rain likely. Waves building to
4 to 8 feet occasionally to 10 feet.

$$

LSZ263-240400-
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-
400 PM EDT Tue Apr 23 2024

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Waves 5 to
9 feet occasionally to 11 feet.
.TONIGHT...Northeast winds 10 to 20 knots. Waves subsiding to
3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Waves building to 3 to 5 feet occasionally to
7 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain. Waves building to
3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots becoming east
15 to 25 knots after midnight. Rain. Waves 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...North winds 15 to 25 knots veering northeast. Rain. A
chance of thunderstorms. A chance of rain. Waves subsiding to
2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 20 to 30 knots. A chance of rain, then
rain likely. Waves building to 4 to 8 feet occasionally to
10 feet.

$$

LSZ264-240400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Tue Apr 23 2024

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...Northeast gales to 35 knots. Waves 8 to 11
feet occasionally to 14 feet subsiding to 7 to 10 feet
occasionally to 13 feet.
.TONIGHT...Northeast winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet,
then building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering southeast
late. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.FRIDAY...Southeast winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Rain. Waves building to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY...Southeast winds 20 to 30 knots backing north. Rain. A
chance of thunderstorms. A chance of rain. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast gales to 35 knots veering east. A chance of
rain, then rain likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ265-240400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Tue Apr 23 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Scattered snow
showers, possibly mixed with rain. Waves 9 to 12 feet
occasionally to 15 feet.
.TONIGHT...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Rain. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...South winds 20 to 30 knots backing north. Rain. A
chance of thunderstorms. A chance of rain. Waves subsiding to
1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northeast winds 20 to 30 knots veering east. Rain
likely. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-240400-
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-
400 PM EDT Tue Apr 23 2024

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...North gales to 35 knots. Scattered snow
showers, possibly mixed with rain. Waves 9 to 12 feet
occasionally to 15 feet building to 10 to 14 feet occasionally to
18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots late. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then becoming north less than 10 knots
late. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 20 to 30 knots. Waves building to
3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southeast winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots. A chance of rain
through midnight, then rain after midnight. Waves building to
4 to 8 feet occasionally to 10 feet.
.SATURDAY...South winds 20 to 30 knots backing north. Rain. A
chance of rain. Waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 20 to 30 knots veering east. A chance
of rain, then rain likely. Waves building to 4 to 7 feet
occasionally to 9 feet.

$$

LSZ267-240400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Tue Apr 23 2024

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.LATE THIS AFTERNOON...North gales to 35 knots. Scattered rain
and snow showers. Waves 4 to 7 feet occasionally to 9 feet
building to 7 to 10 feet occasionally to 13 feet.
.TONIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Isolated snow showers through midnight.
Waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north in the
afternoon, then becoming northwest 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots backing southeast
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.FRIDAY...Southeast winds 20 to 30 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots. A chance of rain
through midnight, then rain after midnight. Waves 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots. Rain. Waves subsiding to 2 to 4 feet.
.SUNDAY...Northeast winds 15 to 25 knots becoming east 20 to
30 knots. Rain likely. Waves building to 3 to 5 feet occasionally
to 7 feet.

$$

LSZ261-240400-
MAFOR 2321/
Superior West 11130 14120 13210. Waves 5 to 8 feet subsiding to 3
to 6 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet
Wednesday.

Superior North Central...GALE WARNING IN EFFECT...11140 12130
12120 11110 11210 11310. Waves 7 to 11 feet subsiding to 4 to 7
feet tonight. Waves 3 to 5 feet subsiding to 1 to 3 feet
Wednesday.

Superior South Central...GALE WARNING IN EFFECT...11840 19847
12130 12120 12110 11200. Waves 9 to 13 feet subsiding to 6 to 9
feet tonight. Waves 5 to 7 feet subsiding to 2 to 3 feet
Wednesday.

Superior East...GALE WARNING IN EFFECT...11150 19156 11150 11140
13130 11110 11800. Waves 5 to 8 feet building to 6 to 10 feet
tonight. Waves 4 to 7 feet subsiding to 1 to 3 feet Wednesday.

$$

JPB

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

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