675
FZUS63 KMQT 220819
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
419 AM EDT Sat Jun 22 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...High pressure of 30.0 inches over Lake Superior today will
weaken to 29.9 inches later today and tonight as a 29.7 low
pressure trough tracks northeast from Wisconsin into eastern Upper
Michigan. As the low passes near the Straits of Mackinac Saturday
night and reaches southern Quebec on Sunday, it will deepen to
29.5 inches. In its wake, 29.9 inch high pressure building into
the Northern Plains on Sunday will settle over the western Great
Lakes region on Monday and then the Appalachians on Tuesday. Back
to the northwest, 29.3 inch low pressure over Manitoba Monday
night will track east toward James Bay on Tuesday, pushing an
associated 29.6 inch trough across Lake Superior through Tuesday
night. 29.9 inch high pressure extends into the Upper Great Lakes
Wednesday from the High Plains.

LSZ162-221630-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
419 AM EDT Sat Jun 22 2024 /319 AM CDT Sat Jun 22 2024/

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. A slight
chance of showers. Waves calm to 2 feet.
.TODAY...Northeast 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. Waves building to 2 to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing northwest after
midnight, then backing west late. A slight chance of showers.
Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. A slight chance of showers
and thunderstorms. Waves calm to 2 feet.
.SUNDAY NIGHT...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 backing east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southwest after
midnight. Showers likely and a chance of thunderstorms. Waves
calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ263-221630-
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-
419 AM EDT Sat Jun 22 2024

.EARLY THIS MORNING...East winds 5 to 15 knots. A slight chance
of showers. Waves calm to 2 feet.
.TODAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. A chance of showers. Waves building to
2 to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing north after
midnight, then backing west late. A slight chance of showers.
Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. A slight chance of showers
and thunderstorms. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of showers through
midnight. A chance of thunderstorms. Showers likely after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ264-221630-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
419 AM EDT Sat Jun 22 2024

.EARLY THIS MORNING...East winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...East winds 5 to 15 knots backing northeast late. A
slight chance of showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing northwest after
midnight. A slight chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of
thunderstorms. Showers likely after midnight. Waves building to
1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ265-221630-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
419 AM EDT Sat Jun 22 2024

.EARLY THIS MORNING...East winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...East winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon, then backing northeast late. A chance of showers.
Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing northwest late.
Patchy fog through midnight. A slight chance of thunderstorms
through midnight. A chance of showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots veering northwest in the
afternoon. A slight chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Showers likely and a
chance of thunderstorms after midnight. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY...West winds 15 to 25 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-221630-
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-
419 AM EDT Sat Jun 22 2024

.EARLY THIS MORNING...East winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots late. A chance of showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing northwest late.
Patchy fog. A slight chance of thunderstorms through midnight. A
chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A slight chance of
showers through early afternoon. Waves 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. 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 chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots veering west. A chance
of showers and thunderstorms. Waves building to 3 to 5 feet
occasionally to 7 feet, then 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.

$$

LSZ267-221630-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
419 AM EDT Sat Jun 22 2024

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots increasing to 10 to 20 knots
late. A chance of showers. Patchy fog by mid afternoon. Waves
calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing north after
midnight, then increasing to 15 to 25 knots late. Patchy fog. A
slight chance of thunderstorms through midnight. A chance of
showers. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A slight chance of
showers by mid afternoon. Waves 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. A slight chance of showers through
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots becoming west 10 to
20 knots. Showers likely. A chance of thunderstorms. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

$$

LSZ261-221630-
MAFOR 2209/
Superior West 11110 14120 11110 11810 11700. A chance of showers
this afternoon and evening. Waves 1 to 3 feet.

Superior North Central 12200 11210 12110 11100 11800 11700. Waves
1 foot or less.

Superior South Central 12200 12210 12120 11810 11720. A chance of
showers. Waves 1 foot or less today. Waves 1 to 3 feet tonight.

Superior East 11100 13200 12110 11810 11820. A chance of showers
this afternoon and tonight. Waves 1 foot or less today. Waves 2
feet or less building to 2 to 3 feet tonight.

$$

Voss

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

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