123
FZUS63 KMQT 121947
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
347 PM EDT Fri Jul 12 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...Lake Superior will be located between high pressure
averaging 30.1 inches over the Appalachians and low pressure
averaging 29.7 inches over the northern Plains this weekend. This
pattern will favor warm southwesterly flow and the potential for
episodes of showers and thunderstorms. A trough of 29.7 inches
sweeps across Lake Superior through Monday, with a 30.1 inch high
gradually building in through the middle of next week.

LSZ162-130400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
347 PM EDT Fri Jul 12 2024 /247 PM CDT Fri Jul 12 2024/

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. A slight chance of showers
and thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. A slight chance of
showers and thunderstorms through early afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers and thunderstorms. Waves
calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots veering northwest. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ263-130400-
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-
347 PM EDT Fri Jul 12 2024

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south in the
afternoon. A slight chance of showers and thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Showers likely and a chance of thunderstorms.
Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. A slight chance of showers and thunderstorms through
early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming south less
than 10 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A chance of showers and thunderstorms. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.

$$

LSZ264-130400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
347 PM EDT Fri Jul 12 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late.
Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A chance of showers through midnight. A chance of
thunderstorms. Showers likely after midnight. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. A slight chance of
showers and thunderstorms through early afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming south less
than 10 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A chance of showers and thunderstorms. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-130400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
347 PM EDT Fri Jul 12 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering southwest late.
Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots becoming southeast
10 to 20 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering southwest
late. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots. A slight chance of showers
and thunderstorms. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-130400-
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-
347 PM EDT Fri Jul 12 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering southwest late.
Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 10 to 20 knots late. Waves
building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering southwest
late. A chance of showers and thunderstorms. Waves subsiding to
calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. A chance of showers and thunderstorms
by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Northwest winds 10 to 20 knots. Waves 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-130400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
347 PM EDT Fri Jul 12 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A chance of showers
and thunderstorms after midnight. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots backing southeast after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers by mid afternoon.
Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots veering northwest. Waves
building to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

$$

LSZ261-130400-
MAFOR 1221/
Superior West 12400 11500 12510 11410 12400. Waves 1 foot or
less.

Superior North Central 13410 14510 11410. Waves around 1 foot.

Superior South Central 12300 11400 13500 11400 11310. Waves 2
feet or less.

Superior East 11200 11300 11400 11410 11400 11500 11400 11300.
Waves 1 foot or less.

$$

JSS

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

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