319
FZUS63 KMQT 240157
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
957 PM EDT Sun Jun 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 29.8 inch ridge continues to shift into the Upper
Great Lakes from the west tonight. The high pressure ridge will
shift southeast, reaching the Appalachians on Tuesday while
building to 30.0 inches. Monday night, a 29.3 inch low will track
east through Manitoba, spinning across northern Ontario into James
Bay Tuesday at 29.2 inches. This low will support a 29.5 inch
trough across Lake Superior Monday night and Tuesday. 29.9 inch
high pressure from the High Plains then extends into the Upper
Great Lakes Wednesday. This high anchors and builds to 30.0 inches
Thursday morning over the Upper Great Lakes. A 29.3 inch low
tracks across northern Minnesota on Friday enabling a 29.4 inch
trough over western Lake Superior Friday afternoon.

LSZ162-241000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
957 PM EDT Sun Jun 23 2024 /857 PM CDT Sun Jun 23 2024/

.REST OF TONIGHT...Southwest winds 5 to 15 knots backing south
late. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east in the
afternoon. A slight chance of showers and thunderstorms by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southwest late.
A chance of showers and thunderstorms. Waves calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots veering south by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. A chance of thunderstorms. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots veering west. Showers
likely. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

$$

LSZ263-241000-
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-
957 PM EDT Sun Jun 23 2024

.REST OF TONIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then becoming southwest 10 to 20 knots late. Showers
likely and a chance of thunderstorms. Waves building to 1 to
3 feet.
.TUESDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.FRIDAY...South winds 10 to 20 knots. Showers likely. Waves 1 to
3 feet.

$$

LSZ264-241000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
957 PM EDT Sun Jun 23 2024

.REST OF TONIGHT...West winds 5 to 15 knots. Patchy fog after
midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering southwest late. A chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves building to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves building to 2 to 4 feet.

$$

LSZ265-241000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
957 PM EDT Sun Jun 23 2024

.REST OF TONIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots. A slight chance of showers
and thunderstorms through early afternoon. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-241000-
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-
957 PM EDT Sun Jun 23 2024

.REST OF TONIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Patchy fog after midnight. Waves 2 to
4 feet subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 10 to 20 knots late. Waves
calm to 2 feet.
.MONDAY NIGHT...South winds 15 to 25 knots. A slight chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A slight chance of showers and thunderstorms through
early afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots veering northwest
after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots. Showers likely. Waves
building to 2 to 4 feet.

$$

LSZ267-241000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
957 PM EDT Sun Jun 23 2024

.REST OF TONIGHT...Northwest winds 10 to 20 knots backing west
after midnight, then diminishing to 5 to 15 knots late. Isolated
showers and thunderstorms by late evening. Patchy fog after
midnight. Waves 2 to 4 feet subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers likely and a slight chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A chance of showers and thunderstorms through early
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves 2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. A chance
of showers, then showers likely. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.

$$
LSZ261-241000-
MAFOR 2403/
Superior West 12500 13400 11300 12310. A chance of showers and
thunderstorms Monday evening. Waves 1 foot or less.

Superior North Central 13610 12500 12310 11320. Waves 2 feet or
less overnight and Monday. Waves 1 to 3 feet Monday evening.

Superior South Central 13600 11500 11300 11310 11320 11420. Waves
2 feet or less overnight and Monday. Waves 1 to 3 feet building
to 2 to 4 feet Monday evening.

Superior East 12610 12600 11500 11400 11310 11320. Waves 2 to 4
feet overnight. Waves 1 to 3 feet Monday and Monday evening.

$$

07

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

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