621
FZUS63 KMQT 141938
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
338 PM EDT Fri Jun 14 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...Ridging of 30.1 inches over Lake Superior continues
building to 30.2 inches as it shifts over the central Great Lakes
Saturday, continuing on toward New England Sunday. Deepening low
pressure near 29.4 inches tracks out of the High Plains Saturday
night, spinning northeast towards Hudson Bay Sunday into Monday as
it deepens to 29.0 inches. This low extends a 29.6 inch trough over
Lake Superior Sunday night before weak ridging of 29.9 inches moves
over Lake Superior from the Northern Plains Monday. A low pressure
around 29.5 inches looks to move off the Colorado Rockies into the
Northern Plains early next week. The low will track across
northern Minnesota at 29.5 inches by Tuesday night and continue
northeast across northern Ontario into Wednesday morning. This low
will support a 29.9 inch trough over Lake Superior through
Wednesday morning.

LSZ162-150345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
338 PM EDT Fri Jun 14 2024 /238 PM CDT Fri Jun 14 2024/

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight, then veering east late. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots becoming east 15 to
25 knots after midnight. A chance of showers through midnight. A
slight chance of thunderstorms. Showers after midnight. Waves
building to 1 to 3 feet.
.SUNDAY...East winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of showers through early
afternoon. A chance of thunderstorms. Showers likely by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots backing northeast after
midnight. Showers likely and a chance of thunderstorms. Waves
calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots veering southwest. A chance
of showers and thunderstorms. Waves building to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ263-150345-
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-
338 PM EDT Fri Jun 14 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds less than 10 knots becoming southeast 5 to
15 knots after midnight, then veering south late. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots backing southeast
after midnight, then increasing to 15 to 25 knots late. A chance
of showers through midnight, then showers and a slight chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.SUNDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Showers likely through early
afternoon. A slight chance of thunderstorms. A slight chance of
showers by mid afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots veering northeast by mid
afternoon. A chance of showers through early afternoon. Showers
likely by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. Showers likely through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.

$$

LSZ264-150345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
338 PM EDT Fri Jun 14 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots late. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots becoming southeast
20 to 30 knots late. A slight chance of showers through midnight,
then showers likely after midnight. Waves building to 2 to
4 feet.
.SUNDAY...Southeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Showers likely through early
afternoon. A slight chance of thunderstorms. A chance of showers
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-150345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
338 PM EDT Fri Jun 14 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots becoming southeast
20 to 30 knots late. A slight chance of showers through midnight,
then showers likely after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Showers likely through early
afternoon. A chance of thunderstorms. A chance of showers by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-150345-
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-
338 PM EDT Fri Jun 14 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots late. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots backing southeast
late. A chance of showers after midnight. Waves building to 2 to
4 feet.
.SUNDAY...Southeast winds 20 to 30 knots veering south by mid
afternoon. Showers through early afternoon. A slight chance of
thunderstorms. A chance of showers by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-150345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
338 PM EDT Fri Jun 14 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing southeast after
midnight, then veering south late. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots backing southeast in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then backing southeast late. A chance of
showers after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southeast winds 20 to 30 knots. Showers. A slight
chance of thunderstorms by mid afternoon. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots. A chance of showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. A
chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ261-150345-
MAFOR 1421/
Superior West 12200 12100 11300 11400 11300 11210. Waves 1 foot
or less.

Superior North Central 12400 13410 12420 11320. Waves 1 to 2
feet.

Superior South Central 12300 12400 11410 13320. Waves 1 to 2
feet.

Superior East 12600 11700 12400 11410 12310. Waves 2 feet 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