665
FZUS63 KMQT 221402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EDT Wed May 22 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 29.2 inch low pressure currently just north of the
Minnesota Arrowhead continues north towards James Bay today into
tonight as it weakens to 29.4 inches. 29.9 inch ridging builds in
Thursday across Lake Superior as the low slowly arrives at James
Bay. This ridging shifts east as a 29.6 inch low lifts northeast
through the Northern Plains Thursday night into Friday. Weak
troughing of 29.8 inches moves over Lake Superior by Saturday. By
Sunday, the troughing will move northeast over northern Ontario as
another low of 29.4 inches lifts from the Southern Plains towards
the Upper Great Lakes.

LSZ162-222215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EDT Wed May 22 2024 /902 AM CDT Wed May 22 2024/

...GALE WARNING IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...Southwest gales to 40 knots veering west in the
afternoon. A slight chance of thunderstorms by late morning. A
slight chance of showers. Waves 6 to 9 feet occasionally to
11 feet building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.FRIDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northeast winds 20 to 30 knots becoming west
15 to 25 knots after midnight. Rain showers likely through
midnight, then a chance of rain showers after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ263-222215-
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-
1002 AM EDT Wed May 22 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Southwest gales to 45 knots veering west in the
afternoon. A slight chance of showers by mid afternoon. Waves 6 to
9 feet occasionally to 11 feet building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.TONIGHT...West gales to 35 knots diminishing to 20 to 30 knots
after midnight. A slight chance of rain showers through midnight.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots backing southwest in the
afternoon, then diminishing to 10 to 20 knots late. Waves
subsiding to 2 to 4 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots increasing to 15 to
25 knots after midnight. A slight chance of rain showers through
midnight. Waves subsiding to calm to 2 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 veering southwest after
midnight. Rain showers likely through midnight. 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 diminishing to 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-222215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EDT Wed May 22 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Southwest gales to 45 knots veering west late. A
slight chance of rain showers. Waves 6 to 9 feet occasionally to
11 feet building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...West gales to 35 knots diminishing to 20 to 30 knots
after midnight. A slight chance of rain showers through midnight.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...East 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 1 to 3 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering southeast after
midnight. Rain showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west 5 to
15 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ265-222215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EDT Wed May 22 2024

...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southwest winds 20 to 30 knots veering west late
with a few gale force gusts to 35 knots possible. A slight chance
of showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight, then veering west late. A slight chance
of showers through midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers by mid afternoon.
Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots veering south after
midnight. Showers likely. Waves building to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ266-222215-
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-
1002 AM EDT Wed May 22 2024

...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...South winds 20 to 30 knots veering southwest in
the afternoon, then veering west late with a few gale force gusts
to 35 knots possible. A slight chance of showers. Waves 4 to 8
feet occasionally to 10 feet, then building to 9 to 12 feet
occasionally to 15 feet.
.TONIGHT...West winds 20 to 30 knots backing southwest after
midnight, then veering west late. A slight chance of rain showers
through midnight. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. Showers. Waves building to 2 to
4 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest. A chance
of rain showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.

$$

LSZ267-222215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EDT Wed May 22 2024

...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...South winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then becoming west 20 to 30 knots
late. A slight chance of showers by mid afternoon. Waves 3 to
6 feet occasionally to 8 feet subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 15 to 25 knots backing southwest after
midnight. A slight chance of showers through midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves building to
2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-222215-
MAFOR 2215/
Superior West...GALE WARNING IN EFFECT...13650 13640 12630. Waves
7 to 11 feet this afternoon. Waves 6 to 9 feet subsiding to 4 to
7 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet
Thursday morning.

Superior North Central...GALE WARNING IN EFFECT...12550 13650
13640. Waves 6 to 9 feet building to 9 to 13 feet this afternoon.
Waves 9 to 13 feet subsiding to 6 to 10 feet tonight. Waves 5 to
9 feet Thursday morning.

Superior South Central 11530 13640 12530 12630. Waves 3 to 5 feet
subsiding to 2 to 4 feet, then building to 3 to 5 feet this
afternoon. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight.
Waves 2 to 4 feet Thursday morning.

Superior East 11430 11530 12630 12530 11540 11630. Waves 3 to 6
feet this afternoon. Waves 4 to 7 feet tonight and Thursday
morning.

$$

Jablonski

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

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