978
FZUS63 KMQT 302001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Thu May 30 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 30.3 inch high pressure system will gradually drift
east across the Great Lakes Basin this evening into Friday. Low
pressure averaging 29.7 inches will move from northern Manitoba into
northern Quebec over the weekend. A 29.5 inch low pressure will move
from the Upper Midwest into Ontario Monday, which will push a cold
front across Lake Superior. Week ridging at 29.8 inches follows over
the Upper Great Lakes on Tuesday as a 29.2 inch low develops over
southern Manitoba.

LSZ162-310415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Thu May 30 2024 /301 PM CDT Thu May 30 2024/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering south after
midnight, then increasing to 10 to 20 knots late. A chance of
rain showers and a slight chance of thunderstorms after midnight.
Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing south late. A
chance of showers. Waves building to 1 to 3 feet, then subsiding
to calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots late. A chance of showers through midnight. A
slight chance of thunderstorms. Showers likely after midnight.
Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. Showers and a chance
of thunderstorms. Waves building to 1 to 3 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers and thunderstorms. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-310415-
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-
401 PM EDT Thu May 30 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
A chance of showers after midnight. Waves building to 1 to
3 feet.
.FRIDAY...Southwest winds 10 to 20 knots. A chance of showers. A
slight chance of thunderstorms by mid afternoon. Waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south late.
A chance of showers through midnight. A slight chance of
thunderstorms. Showers likely after midnight. Waves subsiding to
calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. A slight chance of
thunderstorms through early afternoon. A chance of showers. Waves
building to 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers through midnight. A
chance of thunderstorms. Showers likely after midnight. Waves
building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Showers likely and a chance of thunderstorms. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-310415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Thu May 30 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 building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. A slight chance of showers. Waves 1 to 3 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. A chance of showers
through midnight, then showers likely and a slight chance of
thunderstorms after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Showers likely and a chance of
thunderstorms after midnight. Waves building to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots becoming west 5 to 15 knots.
A chance of thunderstorms. A chance of showers. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ265-310415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Thu May 30 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots. A slight chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then increasing to 10 to 20 knots late.
A chance of showers through midnight, then showers likely and a
slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of showers. A
slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
thunderstorms. Showers likely after midnight. Waves calm to
2 feet.
.MONDAY...South winds 15 to 25 knots becoming west 10 to
20 knots. Showers. A chance of thunderstorms. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots veering southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-310415-
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-
401 PM EDT Thu May 30 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots. A slight chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. A chance of showers.
A slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of showers. A
slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. A chance of showers. A chance of
thunderstorms after midnight. Waves building to 1 to 3 feet.
.MONDAY...South winds 15 to 25 knots becoming west 10 to
20 knots. Showers. A chance of thunderstorms. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots veering southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ267-310415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Thu May 30 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.FRIDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. A chance of showers
after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of showers. A
slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers after midnight.
Waves calm to 2 feet.
.MONDAY...South winds 15 to 25 knots becoming west 10 to
20 knots. Showers. A chance of thunderstorms. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to calm to
2 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing southeast. A
chance of showers. Waves calm to 2 feet.

$$

LSZ261-310415-
MAFOR 3021/
Superior West 12210 11310 11420 11410 13510. A chance of showers
overnight and Friday morning. Waves 1 to 3 feet.

Superior North Central 12320 14420 12520. A chance of showers
Friday morning. Waves 1 to 3 feet.

Superior South Central 11320 11310 15410. Waves 2 feet or less.

Superior East 12300 15410. Waves 2 feet or less.

$$

JSS

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

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