000
FZUS63 KMQT 250149
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
949 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.


LSZ162-251000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
949 PM EDT Wed Apr 24 2024 /849 PM CDT Wed Apr 24 2024/

.REST OF TONIGHT...East winds 5 to 15 knots backing northeast
late. Waves 1 to 3 feet 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.

$$

LSZ263-251000-
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-
949 PM EDT Wed Apr 24 2024

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
late. Waves 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.

$$

LSZ264-251000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
949 PM EDT Wed Apr 24 2024

.REST OF TONIGHT...South winds 5 to 15 knots. 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.

$$

LSZ265-251000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
949 PM EDT Wed Apr 24 2024

.REST OF 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.

$$

LSZ266-251000-
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-
949 PM EDT Wed Apr 24 2024

.REST OF 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.

$$

LSZ267-251000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
949 PM EDT Wed Apr 24 2024

.REST OF TONIGHT...North winds less than 10 knots becoming south
5 to 15 knots 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.

$$
LSZ261-251000-
MAFOR 2503/
Superior West 13200 12300 13210. Waves 2 feet or less.

Superior North Central 12410 12400 11410 12310 11320. Waves 2
feet or less overnight and Thursday.

Superior South Central 12400 12410 11300 11310 12320. Waves 2
feet or less overnight and Thursday. Waves 2 to 3 feet Thursday
evening.

Superior East 11300 12400 12410 11300 12310. 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