649
FZUS63 KMQT 231343
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 AM EDT Sun Jun 23 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 29.8 inch ridge builds into the Upper Great Lakes
from the west today while a deepening low shifts through southern
Ontario into Quebec. The high pressure ridge will shift southeast,
reaching the Appalachians by Tuesday while building to 30.0
inches. Monday night, a 29.3 inch low will track east through
Manitoba, spinning across northern Ontario into James Bay Tuesday
at 29.2 inches. This low will pull a 29.5 inch trough across Lake
Superior Monday night and Tuesday. 29.9 inch high pressure from
the High Plains then extends into the Upper Great Lakes Wednesday.
This high builds to 30.0 inches on Thursday morning over the
Upper Great Lakes.

LSZ162-232145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 AM EDT Sun Jun 23 2024 /843 AM CDT Sun Jun 23 2024/

.REST OF TODAY...West winds 10 to 20 knots becoming southwest
5 to 15 knots in the afternoon. Isolated showers. Isolated
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest after
midnight. Patchy fog after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots veering southwest in the
afternoon, then backing east late. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southwest after
midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves calm to
2 feet.
.TUESDAY...West winds 10 to 20 knots increasing to 20 to 30 knots
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ263-232145-
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 AM EDT Sun Jun 23 2024

.REST OF TODAY...West winds 5 to 15 knots. Scattered showers.
Waves calm to 2 feet building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest after
midnight. Patchy fog after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
through midnight. A chance of thunderstorms. Showers likely after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ264-232145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 AM EDT Sun Jun 23 2024

.REST OF TODAY...West winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Scattered showers. Waves 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest late. Waves
subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
through midnight. A chance of thunderstorms. Showers likely after
midnight. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-232145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 AM EDT Sun Jun 23 2024

.REST OF TODAY...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Scattered showers. Waves 1 to 3 feet building to
2 to 4 feet, then subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers through midnight, then showers likely and a chance of
thunderstorms after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-232145-
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 AM EDT Sun Jun 23 2024

.REST OF TODAY...Northwest winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then diminishing to 10 to
20 knots late. Scattered showers. Waves 1 to 3 feet building to
2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing south in the
afternoon, then backing southeast late. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers through
midnight, then showers likely and a chance of thunderstorms after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A chance of showers and thunderstorms through early
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming southeast
10 to 20 knots. A chance of showers. Waves building to 1 to
3 feet.

$$

LSZ267-232145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 AM EDT Sun Jun 23 2024

.REST OF TODAY...Northwest winds 10 to 20 knots. Scattered
showers and isolated thunderstorms by mid afternoon. Waves 2 to
4 feet subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots. Scattered showers and a
slight chance of thunderstorms through midnight. Waves subsiding
to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers likely and a slight chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. A chance of showers and thunderstorms.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves calm to 2 feet.

$$
LSZ261-232145-
MAFOR 2315/
Superior West 11610 19616 11600 11500 11600 13500 11400. Waves 2
feet or less.

Superior North Central 12620 19626 14610 11610 11500. Waves 1 to
3 feet.

Superior South Central 11620 11720 19726 11720 11610 13600 11500.
Waves 2 to 4 feet this afternoon. Waves 1 to 3 feet subsiding to
1 foot or less tonight. Waves 1 foot or less Monday morning.

Superior East 11710 12720 19726 11710 11600 11610 12600. Waves 2
to 4 feet this afternoon and tonight. Waves 1 to 2 feet Monday
morning.

$$

WFO MQT

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

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