677
FZUS63 KMQT 150144
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
944 PM EDT Tue May 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...A 30.2 inch high pressure over western Hudson Bay is
extending 30.0 inch ridging over Lake Superior that remains in
place until Wednesday night. Meanwhile, a 29.7 inch trough
emerging over the Northern Plains weakens to 29.8 inches as it
shifts over the Upper Mississippi Valley Wednesday night into
Thursday. Weak troughing of 29.8 inches lingers over the lake as a
series of disturbances track across the area this weekend.

LSZ162-150945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
944 PM EDT Tue May 14 2024 /844 PM CDT Tue May 14 2024/

.REST OF TONIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then becoming east 10 to 20 knots
late. A chance of rain showers after midnight. Waves subsiding to
1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.FRIDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots becoming west 15 to
25 knots. A chance of rain showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-150945-
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-
944 PM EDT Tue May 14 2024

.REST OF TONIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon, then veering east late. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. A slight chance of
rain showers after midnight. Waves building to 2 to 4 feet, then
subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers. A
slight chance of thunderstorms by mid afternoon. Waves building
to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots backing northwest
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering southwest. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ264-150945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
944 PM EDT Tue May 14 2024

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
less than 10 knots after midnight, then veering northeast late.
Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
late. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots backing east after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-150945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
944 PM EDT Tue May 14 2024

.REST OF TONIGHT...North winds 5 to 15 knots veering northeast
late. 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 becoming southeast
less than 10 knots after midnight, then increasing to 5 to
15 knots late. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of rain showers. Waves calm
to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of rain showers and a slight chance of
thunderstorms. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-150945-
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-
944 PM EDT Tue May 14 2024

.REST OF TONIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering east after
midnight, then veering southeast late. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of rain showers and a slight chance of
thunderstorms. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-150945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
944 PM EDT Tue May 14 2024

.REST OF TONIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering east after
midnight, then veering southeast late. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. A slight chance of thunderstorms after midnight. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ261-150945-
MAFOR 1503/
Superior West 12100 11200 11210 11110 12120 11220. Waves 1 to 3
feet.

Superior North Central 11700 11800 11200 14210 11200. Waves 1
foot or less.

Superior South Central 12800 12100 11200 11110 11100 11200. Waves
1 foot or less.

Superior East 11810 13110 11100 11800 12810. Waves 1 to 2 feet.

$$

GS

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

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