590
FZUS63 KMQT 061342
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
942 AM EDT Sun Oct 6 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 29.3 inch low pressure over northern Ontario will
weaken to 29.4 inches as it moves over James Bay this evening. At
the same time 30.2 inch high pressure will build over the Northern
and Central Plains. This high will evolve into a north-south
oriented 30.1 inch high pressure ridge that will drift to the
Middle and Upper Mississippi Valley Monday night and then to the
Great Lakes region Tuesday and Wednesday. High pressure builds to
30.2 inches over the Great Lakes on Thursday.

LSZ162-062145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
942 AM EDT Sun Oct 6 2024 /842 AM CDT Sun Oct 6 2024/

...GALE WARNING IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...West gales to 40 knots veering northwest late.
Isolated showers by late morning. Waves 7 to 10 feet occasionally
to 13 feet subsiding to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming west 15 to
25 knots late. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots late. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-062145-
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 AM EDT Sun Oct 6 2024

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots veering northwest late.
Isolated showers. Waves 10 to 14 feet occasionally to 18 feet
subsiding to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots late. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.MONDAY...West winds 15 to 25 knots veering northwest late. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 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 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ264-062145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
942 AM EDT Sun Oct 6 2024

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots veering northwest late.
Isolated showers. Waves 10 to 14 feet occasionally to 18 feet
subsiding to 10 to 14 feet occasionally to 18 feet.
.TONIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots late. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.MONDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then veering northwest late. Waves subsiding to
2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.TUESDAY...Northwest winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
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 veering southwest. Waves
calm to 2 feet.

$$

LSZ265-062145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
942 AM EDT Sun Oct 6 2024

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 40 knots becoming northwest gales
to 45 knots late. Scattered showers. Waves 7 to 11 feet
occasionally to 13 feet.
.TONIGHT...Northwest gales to 45 knots diminishing to 20 to
30 knots late. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots late. Waves subsiding to 2 to 4 feet, then building 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. 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 10 to 20 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ266-062145-
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 AM EDT Sun Oct 6 2024

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots veering northwest late.
Scattered showers. Waves 10 to 14 feet occasionally to 18 feet
building to 12 to 17 feet occasionally to 21 feet.
.TONIGHT...Northwest gales to 45 knots diminishing to 20 to
30 knots late. A slight chance of showers through midnight. Waves
subsiding to 8 to 11 feet occasionally to 14 feet.
.MONDAY...Northwest winds 15 to 25 knots backing west in the
afternoon, then veering northwest late. A slight chance of
showers by mid afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. A slight chance of showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves 2 to
4 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots veering south. Waves
subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ267-062145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
942 AM EDT Sun Oct 6 2024

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots. Scattered showers. Waves
6 to 9 feet occasionally to 11 feet building to 12 to 17 feet
occasionally to 21 feet.
.TONIGHT...Northwest gales to 40 knots diminishing to 20 to 30
knots late. A chance of showers. Waves subsiding to 8 to 11 feet
occasionally to 14 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of showers by mid afternoon.
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. Waves subsiding to
2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves 2 to
4 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming south 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-062145-
MAFOR 0615/
Superior West...GALE WARNING IN EFFECT...11660 13750 12740 11630
11620. Waves 8 to 11 feet this afternoon. Waves 5 to 9 feet
subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet Monday
morning.

Superior North Central...GALE WARNING IN EFFECT...11660 11760
13750 12740 11730. Waves 10 to 14 feet this afternoon. Waves 10
to 13 feet subsiding to 6 to 9 feet tonight. Waves 4 to 7 feet
subsiding to 3 to 5 feet Monday morning.

Superior South Central...GALE WARNING IN EFFECT...11660 11660
19666 11760 19766 11760 12750 11740 11730. Waves 8 to 12 feet
this afternoon. Waves 10 to 14 feet tonight. Waves 7 to 10 feet
subsiding to 4 to 7 feet Monday morning.

Superior East...GALE WARNING IN EFFECT...12650 19656 11750 19756
13750 11740 11730. Waves 9 to 12 feet building to 11 to 16 feet
this afternoon. Waves 12 to 16 feet subsiding to 10 to 14 feet
tonight. Waves 8 to 11 feet subsiding to 6 to 9 feet Monday
morning.

$$

WFO MQT

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

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