248
FZUS63 KMQT 121942
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
342 PM EDT Sun May 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 29.5 inch low will track to James Bay through
Tuesday morning. An associated 29.6 inch trough will move across
Lake Superior through tonight. In its wake, 30.2 inch high
pressure over western Hudson Bay will extend a 29.9 inch ridge
into the Northern Plains and Upper Mississippi Valley on Monday.
This ridge will build to 30.0 inches as it drifts across Lake
Superior during Tuesday night and Wednesday and then moves to
Quebec Thursday. Meanwhile, a 29.7 inch trough emerging over the
western Plains on Tuesday will weaken to 29.8 inches as it shifts
to the Upper Mississippi Valley during Wednesday night and
Thursday.

LSZ162-130345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
342 PM EDT Sun May 12 2024 /242 PM CDT Sun May 12 2024/

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Haze through midnight. Waves subsiding to calm to
2 feet.
.MONDAY...North winds 5 to 15 knots veering southeast in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ263-130345-
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-
342 PM EDT Sun May 12 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Haze through midnight.
Waves subsiding to calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering east late. Waves calm
to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing north after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.TUESDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. A chance
of rain showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.

$$

LSZ264-130345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
342 PM EDT Sun May 12 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...North winds 5 to 15 knots backing west late. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves building to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming west 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. 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. A chance of rain
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. A chance of rain
showers. Waves building to 1 to 3 feet.

$$

LSZ265-130345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
342 PM EDT Sun May 12 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Isolated showers
and thunderstorms. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Haze through midnight. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then diminishing to 5 to 15 knots late. Waves
calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. 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 veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots veering south. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-130345-
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-
342 PM EDT Sun May 12 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Isolated
showers and thunderstorms. Waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots becoming north
15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots veering
southeast after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ267-130345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
342 PM EDT Sun May 12 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Isolated
showers and thunderstorms. Waves 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering northwest after
midnight. Scattered rain showers and isolated thunderstorms
through midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering north after
midnight. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ261-130345-
MAFOR 1221/
Superior West 11610 12720 11710 11700 11800 11100 11300. Waves 1
to 3 feet tonight. Waves 2 feet or less Monday.

Superior North Central 11520 11720 11810 12710 11820 11720 11710.
Waves 2 to 4 feet tonight. Waves 1 to 3 feet Monday.

Superior South Central 12510 14710 12810. Waves 1 to 3 feet.

Superior East 11430 11520 11610 14710 11710. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Monday.

$$

WFO MQT

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

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