550
FZUS63 KMQT 060104
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
904 PM EDT Sat Oct 5 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 30.2 inch high pressure is over the Lower Great
Lakes this evening. A 29.3 inch low pressure near Lake Winnipeg
will track over northern Ontario tonight as an associated 29.6
inch trough and cold front surge across Lake Superior. As the low
weakens to 29.4 inches while moving to southern Hudson Bay on
Sunday, 30.2 inch high pressure will build over the Plains. This
high will evolve into a north-south oriented 30.2 inch high
pressure ridge that will drift to the Middle and Upper Mississippi
Valley during Monday night and then to the Great Lakes region
during Tuesday and Wednesday. High pressure builds to 30.2 inches
and extends southward into the lower Great Lakes Thursday.

LSZ162-060915-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
904 PM EDT Sat Oct 5 2024 /804 PM CDT Sat Oct 5 2024/

...GALE WARNING IN EFFECT FROM 2 AM EDT /1 AM CDT/ SUNDAY THROUGH
SUNDAY EVENING...

.REST OF TONIGHT...Southwest winds 15 to 25 knots becoming west
gales to 40 knots after midnight. Scattered showers and isolated
thunderstorms through midnight. Waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet, then building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY...West gales to 40 knots veering northwest in the
afternoon. A slight chance of showers through early afternoon.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-060915-
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-
904 PM EDT Sat Oct 5 2024

...GALE WARNING IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TONIGHT...Southwest winds 20 to 30 knots becoming west
gales to 40 knots after midnight. Showers and isolated
thunderstorms through midnight. Waves 5 to 8 feet occasionally to
10 feet subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 10 to 14 feet occasionally to 18 feet.
.SUNDAY...West gales to 40 knots becoming northwest gales to
45 knots in the afternoon. A slight chance of showers through
early afternoon. Waves subsiding to 9 to 12 feet occasionally to
15 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 15 to
25 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-060915-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
904 PM EDT Sat Oct 5 2024

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...South gales to 40 knots becoming southwest
20 to 30 knots after midnight, then becoming west gales to
40 knots late. Showers and isolated thunderstorms through
midnight. Waves 10 to 14 feet occasionally to 18 feet subsiding
to 5 to 8 feet occasionally to 10 feet, then building to 10 to
14 feet occasionally to 18 feet.
.SUNDAY...West gales to 45 knots becoming northwest gales to
40 knots late. A slight chance of showers. Waves 10 to 14 feet
occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 15 to
25 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Northwest winds 15 to 25 knots. A slight chance of
showers by mid afternoon. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-060915-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
904 PM EDT Sat Oct 5 2024

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...South gales to 35 knots becoming west 20 to
30 knots after midnight, then increasing to gales to 35 knots
late. Showers and scattered thunderstorms through midnight. Waves
7 to 10 feet occasionally to 13 feet subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet.
.SUNDAY...West gales to 45 knots veering northwest late. A slight
chance of showers. Waves building to 8 to 11 feet occasionally to
14 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots late. A slight chance of showers through midnight. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-060915-
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-
904 PM EDT Sat Oct 5 2024

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...South gales to 40 knots becoming west gales to
35 knots late. Showers through midnight. Scattered thunderstorms.
Scattered showers after midnight. Waves 10 to 14 feet
occasionally to 18 feet subsiding to 5 to 8 feet occasionally to
10 feet, then building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY...West gales to 40 knots becoming northwest gales to
45 knots late. A chance of showers. Waves building to 11 to
15 feet occasionally to 19 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots late. A slight chance of showers through midnight. Waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.
.MONDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers through midnight.
Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ267-060915-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
904 PM EDT Sat Oct 5 2024

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...Southeast gales to 40 knots veering south
after midnight, then becoming southwest 20 to 30 knots late.
Showers and scattered thunderstorms. Waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 40 knots veering northwest late. A chance
of showers. Waves building to 11 to 15 feet occasionally to
19 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 30
knot winds late. A chance of showers. Waves building to 12 to 17
feet occasionally to 21 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers through midnight.
Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-060915-
MAFOR 0603/
Superior West...GALE WARNING IN EFFECT...11640 12650 11660 11760
13750. Waves 3 to 6 feet building to 7 to 10 feet overnight.
Waves 9 to 13 feet Sunday. Waves 7 to 10 feet subsiding to 5 to 8
feet Sunday evening.

Superior North Central...GALE WARNING IN EFFECT...11556 11540
13650 11760 12750. Waves 10 to 14 feet subsiding to 5 to 8 feet
overnight. Waves 10 to 14 feet Sunday and Sunday evening.

Superior South Central...GALE WARNING IN EFFECT...11556 19559
11640 13650 13750. Waves 5 to 9 feet subsiding to 3 to 5 feet
overnight. Waves 6 to 9 feet building to 8 to 12 feet Sunday.
Waves 10 to 13 feet Sunday evening.

Superior East...GALE WARNING IN EFFECT...11456 19459 11556 19559
11540 11640 12650 12750. Waves 6 to 10 feet overnight. Waves 5 to
8 feet building to 11 to 15 feet Sunday. Waves 12 to 16 feet
Sunday evening.

$$

07

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

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