485
FZUS63 KMQT 191949
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
349 PM EDT Wed Jun 19 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...High pressure of 30.3 inches over the Northern Plains
will build to 30.4 inches as it shifts east, settling over Lake
Superior for Thursday and Thursday night. On Friday, 30.3 inch high
pressure ridging will extend from Maine to Lake Superior while 29.7
inch low pressure develops over eastern Colorado. This low will
track northeast to northern Wisconsin on Saturday as the high
pressure ridge drifts northeast. The low will then deepen to 29.4
inches as it tracks across Upper Michigan and southeast Lake
Superior during Saturday night and reaches southern Quebec by
Sunday evening. In its wake, 29.9 inch high pressure building into
the Northern Plains on Sunday will settle over the western Great
Lakes region on Monday.

LSZ162-200400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
349 PM EDT Wed Jun 19 2024 /249 PM CDT Wed Jun 19 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north after midnight.
Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Showers and a chance of thunderstorms.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-200400-
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-
349 PM EDT Wed Jun 19 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...West winds 5 to 15 knots becoming north less than
10 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then veering east late. A slight
chance of showers by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots after midnight. A slight chance of showers. Waves
calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. A chance of showers. A slight chance of thunderstorms
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight. A chance of thunderstorms. Showers likely after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. Showers and a chance of thunderstorms. Waves building
to 1 to 3 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots backing northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ264-200400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
349 PM EDT Wed Jun 19 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots becoming north less than
10 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then diminishing to less than 10 knots
late. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds less than 10 knots. A slight chance
of showers after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A slight chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Showers likely. Waves calm
to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. A chance of showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-200400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
349 PM EDT Wed Jun 19 2024

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then veering north late. Waves subsiding to calm
to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east late. A
slight chance of showers by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming northeast
less than 10 knots after midnight, then veering east late. A
slight chance of showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight. Showers likely after midnight. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Showers and a chance of thunderstorms. Waves
calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. A chance of showers and thunderstorms. Waves calm
to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. A chance
of showers. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ266-200400-
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-
349 PM EDT Wed Jun 19 2024

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. A slight chance of showers
by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots diminishing to less
than 10 knots late. A slight chance of showers. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight. Showers likely after midnight. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of showers and thunderstorms. Waves calm
to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves building to 1 to 3 feet.

$$

LSZ267-200400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
349 PM EDT Wed Jun 19 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...West winds 10 to 20 knots veering north late. Waves
subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of showers by mid afternoon. Waves
calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight, then showers likely after midnight. Waves calm
to 2 feet.
.SATURDAY...East winds 10 to 20 knots. Showers and a chance of
thunderstorms. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots backing northwest
after midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots backing south. Waves building
to 1 to 3 feet.

$$

LSZ261-200400-
MAFOR 1921/
Superior West 11620 11610 11600 11700 14100. Waves 1 to 3 feet
subsiding to 1 foot or less tonight. Waves 1 foot or less
Thursday.

Superior North Central 11630 12610 11700 11800 11100 12200. Waves
3 to 5 feet subsiding to 1 to 3 feet tonight. Waves 2 feet or
less Thursday.

Superior South Central 11630 11620 11610 11700 12800 12100. Waves
2 to 4 feet subsiding to 1 foot or less tonight. Waves 1 foot or
less Thursday.

Superior East 11730 11720 12710 14800. Waves 4 to 7 feet
subsiding to 2 to 3 feet tonight. Waves 1 to 2 feet Thursday.

$$

Rolfson

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

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