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000
FZUS63 KMQT 091346
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
946 AM EDT Tue Apr 9 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...29.8 inch low pressure deepens to 29.7 inches today
as it continues northeast from western Lake Superior to Ontario.
Meanwhile, it will maintain a 29.8 inch trough across most of Lake
Superior. A 29.8 inch trough over Southern Manitoba Wednesday
morning settles southeast across Minnesota and Wisconsin Wednesday
night. Meanwhile, a 29.5 inch low pressure over the lower
Mississippi Valley Wednesday deepens to 29.2 inches while tracking
northeast toward the Lower Great Lakes Thursday. Ridging at 30.0
inches builds and clips western Lake Superior Friday evening then
shifts across Lake Superior Saturday. On Sunday, the ridge weakens
to 29.9 inches over the Upper Great Lakes.

LSZ162-092200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
946 AM EDT Tue Apr 9 2024 /846 AM CDT Tue Apr 9 2024/

.REST OF TODAY...Southwest winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then diminishing to 10 to
20 knots late. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then backing east late. Sprinkles by mid afternoon.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
rain showers. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots by mid afternoon. A chance of rain showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of rain showers. Waves
building to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming north 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-092200-
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-
946 AM EDT Tue Apr 9 2024

.REST OF TODAY...Southwest winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon. Waves 1 to 3 feet subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast
late. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots backing
northeast after midnight. A slight chance of rain showers. Waves
calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.
.THURSDAY NIGHT...North winds 15 to 25 knots. A chance of rain
showers. Waves building to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots becoming west 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ264-092200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
946 AM EDT Tue Apr 9 2024

.REST OF TODAY...Southwest winds 5 to 15 knots. A slight chance
of rain showers by late morning. Waves 1 to 3 feet subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast
late. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of rain showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...West winds 5 to 15 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ265-092200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
946 AM EDT Tue Apr 9 2024

.REST OF TODAY...South winds 5 to 15 knots veering west late. A
slight chance of rain showers by late morning. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming west 10 to
20 knots late. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of rain showers. Waves calm
to 2 feet.
.THURSDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers likely through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ266-092200-
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-
946 AM EDT Tue Apr 9 2024

.REST OF TODAY...South winds 5 to 15 knots veering west late. A
chance of rain showers by late morning. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of rain showers through
midnight. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast
late. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves calm
to 2 feet.
.THURSDAY NIGHT...North winds 15 to 25 knots increasing to gales
to 35 knots after midnight. Rain showers likely. Waves building
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest gales to 40 knots. A chance of rain showers.
Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ267-092200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
946 AM EDT Tue Apr 9 2024

.REST OF TODAY...South winds 10 to 20 knots becoming southeast
5 to 15 knots in the afternoon, then becoming west 10 to 20 knots
late. A chance of rain showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of rain showers through midnight.
Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. A chance of rain showers through early afternoon, then
rain showers likely by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 20 to 30 knots increasing to gales
to 35 knots after midnight. Rain showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...Northwest gales to 40 knots. A chance of rain showers.
Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$
LSZ261-092200-
MAFOR 0915/
Superior West 13520 11510 12500 11600 11500. Waves 1 to 3 feet
this afternoon and tonight. Waves 1 foot or less Wednesday
morning.

Superior North Central 11510 12520 13510 11610 11510. Waves 1 to
3 feet.

Superior South Central 11400 12600 14500 11600. Waves 1 foot or
less.

Superior East 11400 11500 11600 11500 13510 11500. A chance of
rain showers this afternoon. Waves 2 feet or less.

$$

GS

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

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