834
FZUS63 KMQT 260143
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 PM EDT Wed Sep 25 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...29.9 inch ridging over the Great Lakes tonight
increases to 30.0 inches by Thursday morning as the parent high
pressure builds into the region. High pressure ridging continues
over the Great Lakes at 30.0 inches Friday into Saturday despite
the remnants of a 29.5 inch tropical system over the Southeast and
a 29.8 inch low over Hudson Bay. High pressure ridging builds
over the Upper Great Lakes to 30.1 inches on Sunday as a 30.2
inch high pressure moves west to east through northern Ontario.
The ridging diminishes by Monday as a 29.5 inch low lifting
towards Hudson Bay brings troughing of at least 29.7 inches back
over Lake Superior. Behind this, a 30.2 inch high pressure from
the Northern Rockies drops into the Central Plains and brings
ridging of 30.0 inches back over Lake Superior by Tuesday.

LSZ162-260945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 PM EDT Wed Sep 25 2024 /843 PM CDT Wed Sep 25 2024/

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering southeast in the
afternoon, then backing east late. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots backing north after
midnight, then backing southwest late. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots.
Waves calm to 2 feet.
.MONDAY...Southwest winds 15 to 25 knots veering northwest. A
chance of showers. Waves building to 3 to 5 feet occasionally to
7 feet.

$$

LSZ263-260945-
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-
943 PM EDT Wed Sep 25 2024

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds less than 10 knots backing west in the
afternoon, then backing south late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
late. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.
.MONDAY...South winds 15 to 25 knots becoming northwest 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-260945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 PM EDT Wed Sep 25 2024

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight, then diminishing to less than 10 knots late.
Waves calm to 2 feet.
.THURSDAY...North winds less than 10 knots backing west in the
afternoon, then backing south late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots becoming north less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering south. Waves calm
to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ265-260945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 PM EDT Wed Sep 25 2024

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
late. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
late. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering north by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ266-260945-
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-
943 PM EDT Wed Sep 25 2024

.REST OF TONIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then backing east late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering northwest by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-260945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 PM EDT Wed Sep 25 2024

.REST OF TONIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing southwest late. Waves calm
to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then backing east late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots veering southeast. Waves
calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming west 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$
LSZ261-260945-
MAFOR 2603/
Superior West 11600 13700 11800 11300 11200 11300. Waves 1 foot
or less.

Superior North Central 11510 12600 12700 11400 12300. Waves 2
feet or less.

Superior South Central 13500 11600 11700 11800 11200 11300. Waves
1 foot or less.

Superior East 11600 13500 12400 11200 11300. Waves 2 feet or
less.

$$

TAP

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

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