814
FZUS63 KMQT 150809
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
309 AM EST Fri Nov 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 30.0 inch low pressure currently over western Lake
Erie will slowly weaken and eventually dissipate while drifting to
the southeast through today. Meanwhile, a 30.1 inch high pressure
ridge over the Plains will slowly build to 30.2 inches while
moving east, reaching the Upper Great Lakes today. As the ridge
drifts to the Lower Great Lakes by Saturday evening, a 29.5 inch
low pressure will organize over northeast Colorado and then track
to eastern North Dakota. This low will deepen to 29.4 inches as it
moves over northern Ontario during Sunday. On Monday, a 30.0 inch
high pressure ridge will quickly move across the Upper Great
Lakes as a 29.2 inch low pressure organizes over the Southern
Plains. This low pressure continues northeast into the Upper
Mississippi River Valley Tuesday, weakening to near 29.5 inches.

LSZ162-151615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
309 AM EST Fri Nov 15 2024 /209 AM CST Fri Nov 15 2024/

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south late.
Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming east 15 to
25 knots by late morning, then veering southeast by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of rain. Waves building to 2 to
4 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. Waves building to 5 to 9 feet occasionally to 11 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 20 to 30 knots.
A chance of rain. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY...East gales to 35 knots diminishing to 20 to 30 knots.
Rain. Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-151615-
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-
309 AM EST Fri Nov 15 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Patchy fog. Waves
calm to 2 feet.
.TODAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south late.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 20 to 30 knots increasing to gales
to 35 knots after midnight. A chance of rain. Waves building to
3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southwest gales to 35 knots becoming west gales to
40 knots in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY NIGHT...West gales to 35 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 5 to 15 knots becoming east 20 to 30 knots.
A chance of rain. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...East gales to 35 knots diminishing to 20 to 30 knots.
Rain. Waves building to 4 to 8 feet occasionally to 10 feet.

$$

LSZ264-151615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
309 AM EST Fri Nov 15 2024

.EARLY THIS MORNING...Southeast winds less than 10 knots. Patchy
fog. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. A chance of rain.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...South winds 20 to 30 knots becoming west gales to
35 knots in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY NIGHT...West gales to 35 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...West winds 5 to 15 knots becoming east 15 to 25 knots.
A chance of rain. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...East winds 20 to 30 knots. Rain likely, then a chance
of rain. Waves building to 4 to 8 feet occasionally to 10 feet.

$$

LSZ265-151615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
309 AM EST Fri Nov 15 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...West winds 5 to 15 knots increasing to 10 to 20 knots.
Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest by
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...South winds 20 to 30 knots. A chance of rain in
the evening, then rain likely after midnight. Waves subsiding to
1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots becoming west 20 to 30 knots
in the afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of rain. Waves building to 1 to 3 feet.
.TUESDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Rain. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-151615-
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-
309 AM EST Fri Nov 15 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest by
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A slight chance of rain in the evening,
then rain after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...South winds 20 to 30 knots veering southwest in the
afternoon. A chance of rain. Waves building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming east 15 to
25 knots. A chance of rain. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.TUESDAY...East winds 15 to 25 knots. Rain likely. Waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.

$$

LSZ267-151615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
309 AM EST Fri Nov 15 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. Rain after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...South winds 15 to 25 knots veering southwest in the
afternoon. Rain likely in the morning, then a chance of rain in
the afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots veering east. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Rain likely. Waves building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet.

$$

LSZ261-151615-
MAFOR 1510/
Superior West 12600 14510 12500. Waves 1 to 2 feet.

Superior North Central 11300 11400 11510 12610 12510 11500. Waves
1 to 2 feet.

Superior South Central 11500 13610 11710 11600 12500. Waves 2
feet or less.

Superior East 11400 12500 11610 12710 12600. Waves 1 foot or
less.

$$

GS

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

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