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000
FZUS63 KMQT 242002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 PM EDT Wed Apr 24 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... 30.4 inch high pressure settles over the western Great
Lakes this evening before continuing southeast into the Lower
Lakes Thursday. A 29.2 inch low develops off the Colorado Rockies
by Friday morning and tracks northeast toward Lake Superior on
Saturday (weakening to 29.6 inches). The low fills to 29.8 inches early
Sunday morning over eastern Lake Superior as it continues to spin
northeast into northern Quebec. Brief 30.2 inch high pressure
over northern Ontario extends across Lake Superior Sunday
afternoon. A 29.6 inch low lifts from the Central Plains towards
western Lake Superior late Sunday into Monday.


LSZ162-250415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 PM EDT Wed Apr 24 2024 /302 PM CDT Wed Apr 24 2024/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast late. Waves
subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. Waves building to 1 to
3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.FRIDAY...East winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots. Rain showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northeast winds 15 to 25 knots. Rain showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. A chance of rain showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Northeast winds 20 to 30 knots. Rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...Northeast winds 20 to 30 knots becoming west 10 to
20 knots. Rain showers likely. Waves subsiding to calm to 2 feet.

$$

LSZ263-250415-
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-
402 PM EDT Wed Apr 24 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Waves
subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight, then increasing to 10 to 20 knots late. Waves
building to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots backing east after
midnight. Rain showers. Waves 3 to 6 feet occasionally to 8 feet.
.SATURDAY...East winds 10 to 20 knots backing north by mid
afternoon. Rain showers. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots veering northeast
after midnight. A chance of thunderstorms through midnight. A
chance of rain showers. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northeast winds 20 to 30 knots. A chance of rain
showers, then rain showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.MONDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Rain showers likely. Waves subsiding to 1 to 3 feet.

$$

LSZ264-250415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 PM EDT Wed Apr 24 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots. A chance of rain
showers through midnight, then rain showers after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...Southeast winds 15 to 25 knots becoming northeast
10 to 20 knots by mid afternoon. Rain showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots. A chance of
thunderstorms through midnight. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots becoming east 20 to
30 knots. A chance of rain showers, then rain showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...East winds 15 to 25 knots becoming west 10 to 20 knots.
Rain showers likely, then a chance of rain showers. Waves
subsiding to 2 to 4 feet.

$$

LSZ265-250415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 PM EDT Wed Apr 24 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast in the
afternoon, then becoming east 10 to 20 knots late. Waves calm to
2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then backing southeast late. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots. Rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southeast winds 15 to 25 knots veering south by mid
afternoon. Showers and a chance of thunderstorms. Waves subsiding
to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north
20 to 30 knots after midnight. A chance of thunderstorms through
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northeast winds 15 to 25 knots veering east. Rain
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Southeast winds 20 to 30 knots becoming west 15 to
25 knots. Rain showers likely, then a chance of rain showers.
Waves subsiding to calm to 2 feet.

$$

LSZ266-250415-
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-
402 PM EDT Wed Apr 24 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots. A chance of rain
showers through midnight, then rain showers after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...Southeast winds 15 to 25 knots veering south by mid
afternoon. Rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots becoming north 20 to
30 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Northeast winds 20 to 30 knots veering east. A chance
of rain showers, then rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...Southeast winds 20 to 30 knots becoming west 15 to
25 knots. Rain showers likely, then a chance of rain showers.
Waves subsiding to 2 to 4 feet.

$$

LSZ267-250415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 PM EDT Wed Apr 24 2024

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...North winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots backing southeast
late. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots. A chance of rain
showers through midnight, then rain showers after midnight. Waves
building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...Southeast winds 20 to 30 knots veering south by mid
afternoon. Rain showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. Rain showers likely through
midnight. A chance of rain showers after midnight. Waves
subsiding to 2 to 4 feet.
.SUNDAY...Northeast winds 15 to 25 knots becoming east 20 to
30 knots. Rain showers. Waves 2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots veering west. Rain
showers, then a chance of rain showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.

$$

LSZ261-250415-
MAFOR 2421/
Superior West 12210 13200 12300 11210. Waves 2 feet or less.

Superior North Central 11300 11310 13410 11400 11410 11310. Waves
2 feet or less.

Superior South Central 11200 11310 14410 11300 11310. Waves 2
feet or less.

Superior East 12800 13400 11410 11310 11300. Waves 2 feet or
less.

$$

BW

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

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