256
FZUS63 KMQT 251946
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 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...A 30.0 inch high pressure over the Mid-Mississippi
Valley this afternoon and evening moves into the western Great
Lakes by Thursday morning. 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 Sunday as a 30.2 inch high
pressure moves into northern Ontario from the west. The ridging
remains until Monday, when a 29.5 inch low lifting towards Hudson
Bay brings troughing of at least 29.7 inches back over the Lake
Superior.

LSZ162-260400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 PM EDT Wed Sep 25 2024 /246 PM CDT Wed Sep 25 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering northwest after
midnight, then veering north late. Waves calm to 2 feet.
.THURSDAY...Northeast 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.

$$

LSZ263-260400-
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-
346 PM EDT Wed Sep 25 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming north less than
10 knots late. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 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.

$$

LSZ264-260400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 PM EDT Wed Sep 25 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming west less than
10 knots late. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering south in the
afternoon, then backing southeast 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.

$$

LSZ265-260400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 PM EDT Wed Sep 25 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southeast in the
afternoon, then 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.

$$

LSZ266-260400-
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-
346 PM EDT Wed Sep 25 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.THURSDAY...West 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.

$$

LSZ267-260400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 PM EDT Wed Sep 25 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming west 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.

$$

LSZ261-260400-
MAFOR 2521/
Superior West 12510 11500 11700 12800 11200 11300. Waves 2 feet
or less.

Superior North Central 12510 11500 11600 12700 12400. Waves 2
feet or less.

Superior South Central 11710 11600 13500 11600 11700 11200. Waves
2 feet or less.

Superior East 12710 11600 14500 11400. 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