364
FZUS63 KMQT 261946
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 PM EDT Wed Jun 26 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 29.7 inch low pressure trough extending from
southern Quebec to the Mid-Mississippi Valley will continue to
move southeast this afternoon. Meanwhile, a 30.1 inch high
pressure over the Canadian Prairies will weaken to 30.0 inches as
it settles southeast to Minnesota tonight. This high will then
shift east across the Great Lakes region during Thursday and
Thursday night. As the high builds to 30.1 inches while moving to
southern New England by late Friday morning, a 29.4 inch low
pressure will track east to the eastern Dakotas. This low will
then weaken 29.6 inches as it tracks across Lake Superior during
Friday night and Saturday morning. As the low heads toward
southern Quebec on Saturday, 30.2 inch high pressure will build
over the Northern Plains. The high will then build to 30.3 inches
as it shifts east, reaching the western Great Lakes Sunday
evening and centering over the central lakes by Monday.

LSZ162-270400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 PM EDT Wed Jun 26 2024 /246 PM CDT Wed Jun 26 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering northwest late.
Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then becoming south 10 to 20 knots late. Waves calm to
2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots backing northeast
after midnight, then becoming east 10 to 20 knots late. A chance
of showers after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots. Showers and a slight
chance of thunderstorms. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots veering west after
midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. Showers. Waves building to 2 to 4 feet.

$$

LSZ263-270400-
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-
346 PM EDT Wed Jun 26 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
late. A slight chance of showers after midnight. Waves calm to
2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Showers. A slight
chance of thunderstorms by mid afternoon. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. Showers likely. Waves building to 2 to 4 feet.

$$

LSZ264-270400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 PM EDT Wed Jun 26 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of showers
through early afternoon, then showers by mid afternoon. Waves
building to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-270400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 PM EDT Wed Jun 26 2024

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

$$

LSZ266-270400-
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-
346 PM EDT Wed Jun 26 2024

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

$$

LSZ267-270400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 PM EDT Wed Jun 26 2024

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. Showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SATURDAY...South winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.

$$

LSZ261-270400-
MAFOR 2621/
Superior West 12500 12600 11700 11600 11500 11410. Waves 1 foot
or less.

Superior North Central 15610 11600 11510. Waves 1 to 3 feet.

Superior South Central 14710 12610 11600 11500. Waves 2 feet or
less.

Superior East 14720 11710 11700 12600. Waves 1 to 4 feet.

$$

BW

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

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