292
FZUS63 KMQT 270752
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
352 AM EDT Fri Sep 27 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 Upper Great Lakes this
morning holds into Saturday, despite the remnants of Hurricane
Helene at 29.5 inches 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 low of at least 29.4 inches lifts
towards Hudson Bay and brings troughing of around 29.7 inches back
over Lake Superior. Behind this, a 30.3 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.

LSZ162-271600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
352 AM EDT Fri Sep 27 2024 /252 AM CDT Fri Sep 27 2024/

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...Southwest winds 5 to 15 knots. Patchy fog through early
afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots veering southwest late.
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 20 to
30 knots. 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 1 to 3 feet.

$$

LSZ263-271600-
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-
352 AM EDT Fri Sep 27 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...Southwest winds 5 to 15 knots. Patchy fog through early
afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots backing north late.
Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest 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 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming west 20 to
30 knots. A chance of showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 2 to 4 feet.

$$

LSZ264-271600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
352 AM EDT Fri Sep 27 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.TONIGHT...Southwest winds less than 10 knots backing northeast
after midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots backing northwest late.
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 east 5 to
15 knots 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 west 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 20 to 30 knots backing west. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet.

$$

LSZ265-271600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
352 AM EDT Fri Sep 27 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 southeast late. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing north late.
Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north in the
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...Southeast winds 5 to 15 knots veering south after
midnight. 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 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.

$$

LSZ266-271600-
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-
352 AM EDT Fri Sep 27 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 5 to 15 knots veering west in the
afternoon, then backing east late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast late. Waves
calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing north in the
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 20 to 30 knots diminishing to 15 to
25 knots. A chance of showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet.

$$

LSZ267-271600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
352 AM EDT Fri Sep 27 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to 2
feet.
.TODAY...South winds 5 to 15 knots veering west in the afternoon,
then veering northeast late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing north in the
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. Showers likely. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Showers likely, then a chance of showers. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet.

$$

LSZ261-271600-
MAFOR 2709/
Superior West 11500 14510 11600 11800 11100. Waves 1 foot or
less.

Superior North Central 11500 11510 12610 12500 11300 11100. Waves
2 feet or less.

Superior South Central 11600 11610 11600 11100 13300 11200. Waves
1 foot or less.

Superior East 11400 12500 11600 11100 11200 11100 11200. Waves 1
foot or less.

$$

Jablonski

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

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