941
FZUS63 KMQT 230755
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
355 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 29.5 inch low pressure near the Mackinac Straits
early this morning will continue east-northeast into Quebec this
afternoon while strengthening to 29.3 inches. Meanwhile, 29.8
inch ridging builds into the Upper Great Lakes from the west today.
The high pressure ridge will then shift southeast into the
Appalachians Tuesday while building to 30.0 inches. Monday night,
a 29.2 inch low will track east through Manitoba, spinning across
northern Ontario into James Bay Tuesday. This low will enable a
29.5 inch trough to sweep across Lake Superior 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.


LSZ162-231600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
355 AM EDT Sun Jun 23 2024 /255 AM CDT Sun Jun 23 2024/

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon. A slight chance of showers. A slight chance of
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.

$$

LSZ263-231600-
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-
355 AM EDT Sun Jun 23 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots. A chance of showers. Waves
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.

$$

LSZ264-231600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
355 AM EDT Sun Jun 23 2024

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. A slight
chance of showers. Waves calm to 2 feet.
.TODAY...West winds 5 to 15 knots. A chance of showers. Waves
building to 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.

$$

LSZ265-231600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
355 AM EDT Sun Jun 23 2024

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Patchy fog.
A slight chance of showers. Waves 1 to 3 feet.
.TODAY...West winds 10 to 20 knots. A slight chance of showers.
Waves 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.

$$

LSZ266-231600-
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-
355 AM EDT Sun Jun 23 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Patchy fog. A
chance of showers. Waves 2 to 4 feet.
.TODAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. A chance of showers. A slight chance of thunderstorms by
mid afternoon. Waves subsiding to 1 to 3 feet, then 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.

$$

LSZ267-231600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
355 AM EDT Sun Jun 23 2024

.EARLY THIS MORNING...North winds 15 to 25 knots. Patchy fog. A
chance of showers. Waves 2 to 4 feet.
.TODAY...North winds 10 to 20 knots backing northwest in the
afternoon. A chance of showers. A slight chance of thunderstorms
by mid afternoon. Waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots. A slight chance of showers
and 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.

$$

LSZ261-231600-
MAFOR 2309/
Superior West 13610 13600 12500. Waves 2 feet or less.

Superior North Central 11710 13620 14610. A chance of showers
this afternoon. Waves 1 to 3 feet.

Superior South Central 12720 12620 12610 12600. A chance of
showers early this morning. Waves 1 to 3 feet building to 2 to 4
feet today. Waves 1 to 3 feet tonight.

Superior East 11820 14710 11710 11600 11610. A chance of showers
early this morning. A chance of showers this afternoon. A chance
of showers this evening. Waves 2 to 4 feet.

$$

Voss

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weather.gov/mqt/glftable

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weather.gov/greatlakes