206
FZUS63 KMQT 240754
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
354 AM EDT Fri May 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...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 currently organizing over the
Dakotas will lift northeast, reaching southeast Manitoba tonight.
An associated 29.6 inch trough will sweep across Lake Superior
during tonight 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.

LSZ162-241600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
354 AM EDT Fri May 24 2024 /254 AM CDT Fri May 24 2024/

...GALE WARNING IN EFFECT FROM 11 AM EDT /10 AM CDT/ THIS MORNING
THROUGH THIS EVENING...

.EARLY THIS MORNING...East winds 20 to 30 knots. Waves 2 to
4 feet building to 3 to 6 feet occasionally to 8 feet.
.TODAY...East gales to 35 knots. A chance of rain showers. A
chance of thunderstorms by mid afternoon. Waves building to 9 to
12 feet occasionally to 15 feet.
.TONIGHT...East winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight. A chance of showers and thunderstorms
through midnight. Waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of rain showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. 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. Waves subsiding to calm to 2 feet.

$$

LSZ263-241600-
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-
354 AM EDT Fri May 24 2024

.EARLY THIS MORNING...East winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...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.
.TONIGHT...East winds 20 to 30 knots veering southeast after
midnight, then becoming southwest 15 to 25 knots late. Showers
likely through midnight. A chance of thunderstorms. A chance of
showers after midnight. Waves subsiding to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY...Southwest winds 15 to 25 knots. Waves building to
5 to 8 feet occasionally to 10 feet, then subsiding to 2 to
4 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. A chance of showers by mid afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-241600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
354 AM EDT Fri May 24 2024

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots increasing to 15 to 25 knots in
the afternoon. A slight chance of rain showers by mid afternoon.
Waves building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...East winds 20 to 30 knots becoming southeast 15 to
25 knots after midnight, then veering south late. Showers and a
slight chance of thunderstorms. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming south 10 to
20 knots late. Waves building to 5 to 8 feet occasionally to
10 feet, then 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 backing east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers. Waves building to 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.

$$

LSZ265-241600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
354 AM EDT Fri May 24 2024

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots increasing to 15 to 25 knots. A
chance of rain showers by mid afternoon. Waves building to 2 to
4 feet.
.TONIGHT...East winds 15 to 25 knots veering southeast after
midnight, then veering southwest late. 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 backing southwest in the
afternoon, then backing southeast late. Waves subsiding to calm
to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of showers by mid afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of showers through midnight. Showers
likely after midnight. Waves building to 1 to 3 feet.
.MONDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.

$$

LSZ266-241600-
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-
354 AM EDT Fri May 24 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. A slight
chance of rain showers by mid afternoon. Waves building to 2 to
4 feet.
.TONIGHT...East winds 15 to 25 knots veering southeast late.
Showers and a slight chance of thunderstorms. Waves building to
4 to 8 feet occasionally to 10 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest in the
afternoon, then backing southeast late. A chance of rain showers
through early afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. 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...East winds 10 to 20 knots backing northeast after
midnight. A chance of showers through midnight. Showers likely
after midnight. Waves building to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots backing northwest. A chance
of showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 2 to 4 feet.

$$

LSZ267-241600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
354 AM EDT Fri May 24 2024

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...North winds 5 to 15 knots veering east late. Waves calm
to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 20 to
30 knots after midnight. A chance of showers through midnight,
then showers and a slight chance of thunderstorms after midnight.
Waves building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...South winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon, then backing southeast late. A chance
of rain 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 becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of showers
through midnight, then showers likely after midnight. Waves
building to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots backing northwest. Showers
likely, then a chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 2 to 4 feet.

$$

LSZ261-241600-
MAFOR 2409/
Superior West...GALE WARNING IN EFFECT...11230 11240 12250 11256
11246 11330 11530. A chance of thunderstorms this afternoon and
evening. Waves 2 to 4 feet building to 9 to 12 feet today. Waves
9 to 12 feet subsiding to 3 to 5 feet tonight.

Superior North Central 11110 11210 12220 11230 11240 12346. Waves
1 to 3 feet building to 2 to 4 feet today. Waves 3 to 6 feet
building to 5 to 9 feet tonight.

Superior South Central 11100 11200 11210 12220 11230 12336. Waves
1 to 3 feet today. Waves 3 to 6 feet tonight.

Superior East 11800 11100 11200 12210 11220 11230 11336. Waves 1
to 2 feet today. Waves 1 to 3 feet building to 4 to 6 feet
tonight.

$$

RE/GS

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

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