025
FZUS63 KMQT 151957
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
357 PM EDT Sun Sep 15 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 30.3 inch high pressure anchors offshore of the New
England Coast this afternoon through Wednesday, extending 30.1
inch ridging back into the Great Lakes region. Meanwhile, a 29.9
inch low pressure trough currently across south central Canada and
the Dakotas will drift into northern Ontario on Monday before
dissipating. Then, a 29.4 inch trough emerges over the western
Great Plains on Tuesday. Low pressure of 29.3 inches develops
along this trough over the northwestern Plains Tuesday night into
Wednesday, then meanders northward into Saskatchewan Wednesday and
Wednesday night. On Thursday, the low lifts north into northern
Manitoba while 30.1 inch ridging extends from northern Quebec into
the Great Lakes region. On Friday, the low lifts northeast toward
Hudson bay while the high shifts east over northern Quebec, still
extending 30.1 inch ridging over the Great Lakes.

LSZ162-160400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
357 PM EDT Sun Sep 15 2024 /257 PM CDT Sun Sep 15 2024/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering southwest late.
A chance of showers and a slight chance of thunderstorms after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east late. A chance
of showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight, then veering south late. A slight chance of showers and
thunderstorms. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2
feet.
.THURSDAY...East winds 5 to 15 knots veering south. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ263-160400-
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-
357 PM EDT Sun Sep 15 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of showers and thunderstorms after midnight. Waves
calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. A slight chance of showers and thunderstorms. Waves
calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ264-160400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
357 PM EDT Sun Sep 15 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of showers and thunderstorms after midnight. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
late. A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ265-160400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
357 PM EDT Sun Sep 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A slight
chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest late.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late. A
slight chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. A slight chance of showers and thunderstorms through
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-160400-
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-
357 PM EDT Sun Sep 15 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A slight
chance of showers. Waves calm to 2 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
by the afternoon, then backing southeast late. A slight chance of
showers. A slight chance of thunderstorms by mid afternoon. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots veering south. Waves calm
to 2 feet.

$$

LSZ267-160400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
357 PM EDT Sun Sep 15 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY...South winds 5 to 15 knots backing southeast late. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-160400-
MAFOR 1521/
Superior West 11200 11310 14510 11400 11410. A chance of showers
and thunderstorms Monday morning. Waves 1 foot or less.

Superior North Central 11310 12410 14510 11510. Waves 1 to 3
feet.

Superior South Central 11320 12420 14410 11300. Waves 1 to 3 feet
tonight. Waves 2 feet or less Monday.

Superior East 11310 13420 13410 11400. Waves 1 to 3 feet.

$$

Jablonski

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

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