922
FZUS63 KMQT 240210
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1010 PM EDT Thu May 23 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 29.9 inch high pressure ridge extending from
northern Manitoba to Lower Michigan will drift east, extending
from Hudson Bay to the Lower Great Lakes by Friday evening.
Meanwhile, 29.4 inch low pressure organizing over the Dakotas
overnight will lift northeast, reaching southeast Manitoba Friday
night. An associated 29.6 inch trough will sweep across Lake
Superior during Friday night and early Saturday morning. In its
wake, a 29.9 inch high pressure will build northeast into the
western Great Lakes region on Saturday. The high will shift
toward New England on Sunday as the next low pressure of 29.4
inches lifts northeast to southern Wisconsin. This low will deepen
to 29.3 inches as it tracks to near the Straits of Mackinac by
Monday morning and then to near James Bay by Tuesday morning. In
its wake, 30.2 inch high pressure will build over the Plains on
Tuesday.

LSZ162-241015-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1010 PM EDT Thu May 23 2024 /910 PM CDT Thu May 23 2024/

...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
EVENING...

.REST OF TONIGHT...Northeast winds 5 to 15 knots becoming east
10 to 20 knots after midnight, then increasing to 20 to 30 knots
late. Waves calm to 2 feet building to 3 to 6 feet occasionally
to 8 feet.
.FRIDAY...East winds 20 to 30 knots increasing to gales to
35 knots. A chance of rain showers through early afternoon, then
rain showers 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 veering south after
midnight, then becoming west 15 to 25 knots late. A chance of
rain showers and a slight chance of thunderstorms. Waves
subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots becoming east
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-241015-
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-
1010 PM EDT Thu May 23 2024

.REST OF TONIGHT...East winds 5 to 15 knots increasing to 15 to
25 knots. Waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of rain showers and a slight chance of
thunderstorms by mid afternoon. Waves building to 5 to 9 feet
occasionally to 11 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering south after
midnight, then veering southwest late. Rain showers through
midnight. A chance of thunderstorms. A slight chance of rain
showers after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots. Waves building to
3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ264-241015-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1010 PM EDT Thu May 23 2024

.REST OF TONIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of rain showers by mid afternoon.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering south late.
Rain showers through midnight. A slight chance of thunderstorms.
A chance of rain showers after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY...Southwest winds 15 to 25 knots. A slight chance of
rain showers through early afternoon. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 1 to 3 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves 1 to 3 feet.

$$

LSZ265-241015-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1010 PM EDT Thu May 23 2024

.REST OF TONIGHT...North winds 5 to 15 knots veering east late.
Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of rain showers by mid afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering southwest
late. Showers and a slight chance of thunderstorms. Waves
building to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots. A slight chance of showers
through early afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ266-241015-
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-
1010 PM EDT Thu May 23 2024

.REST OF TONIGHT...North winds 5 to 15 knots. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering south late.
Rain showers and a slight chance of thunderstorms. Waves building
to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers and a
slight chance of thunderstorms through early afternoon. Waves
subsiding to 2 to 4 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of showers. Waves 2 to 4 feet.

$$

LSZ267-241015-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1010 PM EDT Thu May 23 2024

.REST OF TONIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots late. Waves 2 to 4 feet subsiding to calm to
2 feet.
.FRIDAY...North winds 5 to 15 knots becoming east 10 to 20 knots
in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. Showers. A slight chance of
thunderstorms after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms through early afternoon. Waves subsiding
to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots veering north. A chance
of showers. Waves 2 to 4 feet.

$$
LSZ261-241015-
MAFOR 2403/
Superior West...GALE WARNING IN EFFECT...11210 12230 11240 11240
19250 12256 11246. A chance of thunderstorms Friday evening.
Waves 1 to 4 feet overnight building to 7 to 11 feet Friday.
Waves 8 to 11 feet subsiding to 6 to 9 feet Friday evening.

Superior North Central 12810 11100 11210 11220 12230 11236. Waves
1 to 5 feet.

Superior South Central 11810 12100 11210 11220 12230 11226. Waves
1 to 5 feet.

Superior East 11710 11810 11800 11100 13210 11220. Waves 1 to 3
feet.

$$

Rolfson

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

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