724
FZUS63 KMQT 230148
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
948 PM EDT Wed May 22 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 29.3 inch low pressure currently north of Lake
Superior continues towards James Bay today tonight as it weakens
to 29.4 inches. 29.9 inch ridging builds in Thursday across Lake
Superior as the low slowly arrives at James Bay. This ridging
shifts east as a 29.7 inch low lifts northeast through the
Northern Plains Thursday night into Friday. Weak troughing of 29.8
inches moves over Lake Superior by Saturday. By Sunday, the
troughing will move northeast over northern Ontario as another low
of 29.4 inches lifts from the Southern Plains towards the Upper
Great Lakes. This low moves over lower Michigan Monday morning and
becomes centered over Lake Huron Monday evening.

LSZ162-231000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
948 PM EDT Wed May 22 2024 /848 PM CDT Wed May 22 2024/

.REST OF TONIGHT...West winds 15 to 25 knots. Isolated rain
showers by late evening. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then backing south late. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of rain showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.FRIDAY...East winds 20 to 30 knots with a few gale force gusts
to 35 knots by mid afternoon. A slight chance of rain showers
through early afternoon, then rain showers likely and a slight
chance of thunderstorms by mid afternoon. Waves building to 8 to
11 feet occasionally to 14 feet.
.FRIDAY NIGHT...East winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. Rain showers likely through
midnight, then a chance of rain showers after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots becoming north 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-231000-
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-
948 PM EDT Wed May 22 2024

.REST OF TONIGHT...West winds 20 to 30 knots. Isolated rain
showers by late evening. Waves 5 to 8 feet occasionally to
10 feet subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots backing southwest in the
afternoon, then diminishing to 10 to 20 knots late. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight, then veering east late. A slight
chance of rain showers through midnight. Waves subsiding to calm
to 2 feet, then building to 2 to 4 feet.
.FRIDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. A chance of rain showers. A slight chance of
thunderstorms by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering southwest after
midnight. Rain showers likely through midnight, then a chance of
rain showers after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots. A chance of rain
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ264-231000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
948 PM EDT Wed May 22 2024

.REST OF TONIGHT...West winds 20 to 30 knots. Numerous rain
showers by late evening, then isolated rain showers after
midnight. Waves 7 to 10 feet occasionally to 13 feet subsiding to
4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering northeast
late. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers and a slight chance of
thunderstorms by mid afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering south after
midnight. Rain showers likely. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southwest winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.
.MONDAY...North winds 5 to 15 knots. A chance of showers. Waves
building to 1 to 3 feet.

$$

LSZ265-231000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
948 PM EDT Wed May 22 2024

.REST OF TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Isolated showers by late evening. Waves
3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Showers and a chance of thunderstorms. Waves
building to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers. Waves subsiding
to calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-231000-
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-
948 PM EDT Wed May 22 2024

.REST OF TONIGHT...West winds 20 to 30 knots. Scattered rain
showers by late evening. Waves 7 to 10 feet occasionally to
13 feet subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering southeast after
midnight. Showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. A chance of showers. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.

$$

LSZ267-231000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
948 PM EDT Wed May 22 2024

.REST OF TONIGHT...West winds 15 to 25 knots. Isolated rain
showers by late evening. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering north late.
Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast 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.
.FRIDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. A chance of showers through
midnight. Showers likely after midnight. Waves building to 2 to
4 feet.
.SATURDAY...South winds 10 to 20 knots veering west by mid
afternoon. A chance of showers. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.

$$
LSZ261-231000-
MAFOR 2303/
Superior West 13630 11620 12520 11410 11300. Waves 3 to 5 feet
overnight subsiding to 1 to 3 feet Thursday and Thursday evening.

Superior North Central 11640 19646 14640 11630 11620 11710. Waves
5 to 9 feet overnight subsiding to 3 to 6 feet Thursday, then
diminishing to 2 to 3 feet Thursday evening.

Superior South Central 14630 11630 11620 11710 11700. Waves 2 to
5 feet overnight and Thursday subsiding to 1 to 3 feet Thursday
evening.


Superior East 15630 11620 11610. Waves 5 to 8 feet overnight and
Thursday subsiding to 3 to 5 feet Thursday evening.

$$

BW

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

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