848
FZUS63 KMQT 261938
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
338 PM EDT Thu Sep 26 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...30.0 inch ridging over the Great Lakes this afternoon
holds 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 at
least 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 around 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 at least 30.0 inches
back over Lake Superior by Tuesday.

LSZ162-270345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
338 PM EDT Thu Sep 26 2024 /238 PM CDT Thu Sep 26 2024/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight, then veering south late. Areas of dense fog after
midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering south after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.

$$

LSZ263-270345-
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-
338 PM EDT Thu Sep 26 2024

.LATE THIS AFTERNOON...South winds less than 10 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south less than
10 knots after midnight, then increasing to 5 to 15 knots late.
Areas of dense fog after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming northeast less
than 10 knots after midnight, then increasing to 5 to 15 knots
late. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 20 to
30 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 2 to 4 feet.

$$

LSZ264-270345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
338 PM EDT Thu Sep 26 2024

.LATE THIS AFTERNOON...Southeast winds less than 10 knots. Waves
calm to 2 feet.
.TONIGHT...Southeast winds less than 10 knots increasing to 5 to
15 knots late. Areas of dense fog 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 northeast
less than 10 knots after midnight, then backing north late. Waves
calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. 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 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 20 to
30 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to 2 to 4 feet.

$$

LSZ265-270345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
338 PM EDT Thu Sep 26 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering southwest late.
Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing southeast late. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots backing east after
midnight, then backing north late. Patchy fog after midnight.
Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. 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.
.TUESDAY...Northwest winds 20 to 30 knots becoming west 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.

$$

LSZ266-270345-
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-
338 PM EDT Thu Sep 26 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south late. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots backing northeast late.
Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

$$

LSZ267-270345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
338 PM EDT Thu Sep 26 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Patchy fog after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing east late. Waves calm
to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots veering southeast
late. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots backing north by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

$$

LSZ261-270345-
MAFOR 2621/
Superior West 14200 11404 11514 12510. Waves 1 foot or less.

Superior North Central 14300 11304 13510. Waves 1 foot or less.

Superior South Central 11200 12300 11400 11500 12600 11400. Waves
1 foot or less.

Superior East 12200 12300 13400 11500. Waves 1 foot 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