346
FZUS63 KMQT 130138
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
938 PM EDT Mon Aug 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...A 30.1 inch high pressure ridge shifts over the Great
Lakes tonight, lingering through Wednesday. As the ridge then
shifts east, reaching the Atlantic Coast by Thursday evening, a
29.7 inch low pressure trough will move across the Plains to the
Mississippi Valley. This trough then transitions to a 29.6 inch
low pressure system over the western Great Lakes region on Friday,
continuing east over the Great Lakes Basin on Saturday.

LSZ162-130945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
938 PM EDT Mon Aug 12 2024 /838 PM CDT Mon Aug 12 2024/

.REST OF TONIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering west after
midnight, then veering northeast late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...East winds 15 to 25 knots. A chance of showers. Waves
building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots. Showers likely.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing north. A chance
of showers. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ263-130945-
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-
938 PM EDT Mon Aug 12 2024

.REST OF TONIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots becoming south
less than 10 knots after midnight, then veering southwest late.
Waves calm to 2 feet.
.WEDNESDAY...Southeast winds less than 10 knots becoming east
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots. A chance of showers
through midnight. A chance of thunderstorms. Showers likely after
midnight. Waves 1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. A chance
of showers. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ264-130945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
938 PM EDT Mon Aug 12 2024

.REST OF TONIGHT...Southwest winds less than 10 knots increasing
to 5 to 15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Southwest winds less than 10 knots. Waves calm
to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots becoming northeast 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ265-130945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
938 PM EDT Mon Aug 12 2024

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
late. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing southeast in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
late. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots backing north. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest. Waves
calm to 2 feet.

$$

LSZ266-130945-
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-
938 PM EDT Mon Aug 12 2024

.REST OF TONIGHT...Southwest winds 5 to 15 knots backing south
late. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots backing east. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SATURDAY...North winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ267-130945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
938 PM EDT Mon Aug 12 2024

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming west
less than 10 knots after midnight, then becoming southwest 5 to
15 knots late. Patchy fog after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots becoming northeast less
than 10 knots late. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots backing east. A chance
of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north. A
chance of showers. Waves calm to 2 feet.

$$
LSZ261-130945-
MAFOR 1303/
Superior West 14600 11600 12500 11400. Waves 1 foot or less.

Superior North Central 14500 11600 13500. Waves 1 foot or less.

Superior South Central 12400 12500 11400 13300. Waves 1 foot or
less.

Superior East 12600 19604 11500 19504 14300 11200. Waves 1 foot
or less.

$$

Jablonski

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

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