610
FZUS63 KMQT 301345
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
945 AM EDT Tue Apr 30 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 and tracks east across Ontario while weakening today. In
its wake, a weak high pressure ridge of 29.9 inches shifts east
across Lake Superior. By this evening, a 29.6 inch low pressure
over southern Minnesota is expected to track northeast across
western Lake Superior tonight. This low pressure weakens as it
tracks across the lake over Ontario by Wednesday evening. Ridging
builds to 30.1 inches over the lake Wednesday night and Thursday
ahead of a 29.6 inch low pressure tracking across the Upper
Mississippi Valley Thursday and Thursday night then to
northwestern Ontario on Friday. A weak 29.9 inch trough pivots
across the lake on Saturday ahead of ridging that builds to 30.0
inches over the Great Lakes Basin on Sunday.

LSZ162-302145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
945 AM EDT Tue Apr 30 2024 /845 AM CDT Tue Apr 30 2024/

.REST OF TODAY...West winds 5 to 15 knots backing south late.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
after midnight, then backing northeast late. Rain showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. A chance of rain showers through early afternoon. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 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 rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...East winds 20 to 30 knots. Rain showers likely.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering north. A
chance of rain showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.

$$

LSZ263-302145-
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-
945 AM EDT Tue Apr 30 2024

.REST OF TODAY...West winds 5 to 15 knots backing southwest late.
Waves 2 to 4 feet subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of rain showers through midnight, then rain showers
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. A chance of rain 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.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
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 by mid
afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet.
.SATURDAY...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.

$$

LSZ264-302145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
945 AM EDT Tue Apr 30 2024

.REST OF TODAY...Northwest winds 10 to 20 knots backing west in
the afternoon, then diminishing to 5 to 15 knots late. Patchy fog
by late morning. A slight chance of rain showers by late morning.
Waves 2 to 4 feet subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
Rain showers after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. Rain showers likely 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.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 20 to 30 knots. A chance of rain
showers through midnight. Rain showers likely after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$

LSZ265-302145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
945 AM EDT Tue Apr 30 2024

.REST OF TODAY...West winds 10 to 20 knots becoming northwest
5 to 15 knots late. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Rain showers after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming west to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon. A chance of rain showers through early afternoon.
Waves subsiding to 2 to 4 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of rain showers by mid afternoon.
Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. Rain 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 showers. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots backing southeast. A
chance of rain showers. Waves building to 1 to 3 feet.

$$

LSZ266-302145-
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-
945 AM EDT Tue Apr 30 2024

.REST OF TODAY...West winds 10 to 20 knots veering northwest
late. Patchy fog by late morning. Waves 1 to 3 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. Rain showers
after midnight. Waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots becoming west to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon. A chance of rain showers. Waves building to 6 to
9 feet occasionally to 11 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...North winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Rain showers likely and a chance
of thunderstorms. Waves building to 3 to 6 feet occasionally to
8 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming east 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ267-302145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
945 AM EDT Tue Apr 30 2024

.REST OF TODAY...West winds 10 to 20 knots. Patchy fog by late
morning. A slight chance of rain showers by late morning. Waves
calm to 2 feet building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots backing southeast after
midnight, then increasing to 10 to 20 knots late. Rain showers
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots veering west in the
afternoon, then increasing to 20 to 30 knots late. 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 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering east by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight. Rain showers likely. A chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. Rain showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots backing east. A chance
of rain showers. Waves calm to 2 feet.

$$
LSZ261-302145-
MAFOR 3015/
Superior West 11610 11510 11400 11210 11226 12236 11630. Waves 2
to 3 feet this afternoon. Waves 1 to 2 feet building to 4 to 7
feet tonight. Waves 4 to 7 feet subsiding to 3 to 5 feet
Wednesday morning.

Superior North Central 11720 11620 11610 11400 11310 11320 12336.
Waves 2 to 3 feet this afternoon. Waves 1 to 2 feet building to 2
to 4 feet tonight. Waves 3 to 6 feet building to 4 to 7 feet
Wednesday morning.

Superior South Central 11630 11720 11800 11210 11310 11320 11336
11430. Waves 1 to 3 feet this afternoon. Waves 1 to 2 feet
building to 2 to 4 feet tonight. Waves 3 to 5 feet Wednesday
morning.

Superior East 13620 11600 11400 11310 11326 11336. Waves 1 to 3
feet this afternoon and tonight. Waves 2 to 4 feet building to 3
to 5 feet Wednesday morning.

$$

TAP

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