933
FZUS63 KMQT 020755
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
355 AM EDT Tue Jul 2 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 29.4 inch low will continue to deepen as it shifts
into northern Ontario today while a 30.2 inch high pressure moves
off the coast of the Northeast US. An associated 29.7 inch trough
will sweep across Lake Superior tonight and Wednesday morning as
the low continues northeast over Hudson Bay. In its wake, a 29.9
inch high pressure ridge will shift east, reaching the western
Great Lakes on Thursday. A 29.7 inch low pressure organizing over
the Plains on Thursday will then track to the western Great Lakes
region on Friday. The low continues northeast, reaching Quebec by
Saturday evening.

LSZ162-021600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
355 AM EDT Tue Jul 2 2024 /255 AM CDT Tue Jul 2 2024/

.EARLY THIS MORNING...South winds 15 to 25 knots. Showers and a
slight chance of thunderstorms. Waves 1 to 3 feet.
.TODAY...South winds 15 to 25 knots diminishing to 10 to 20 knots
late. Patchy fog through early afternoon. A chance of showers
through early afternoon. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest after
midnight. A slight chance of showers and thunderstorms. Patchy
dense fog after midnight. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight. A chance of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-021600-
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-
355 AM EDT Tue Jul 2 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. A chance of
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...South winds 15 to 25 knots diminishing to 10 to 20 knots
late. Showers likely through early afternoon. Patchy fog. Waves
2 to 4 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers and a slight chance of
thunderstorms. Patchy dense fog after midnight. Waves subsiding
to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming southwest 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...West 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 backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-021600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
355 AM EDT Tue Jul 2 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. A slight chance
of showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Patchy fog. Showers likely through early
afternoon. A slight chance of showers by mid afternoon. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. A chance of showers and a slight chance of thunderstorms.
Areas of dense fog after midnight. Waves subsiding to 2 to
4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.WEDNESDAY NIGHT...West 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 backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ265-021600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
355 AM EDT Tue Jul 2 2024

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. A chance of
showers. Waves 1 to 3 feet.
.TODAY...Southeast winds 15 to 25 knots veering south in the
afternoon. Patchy fog. Showers through early afternoon. A slight
chance of showers by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest late. A
chance of showers. A slight chance of thunderstorms after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-021600-
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-
355 AM EDT Tue Jul 2 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. A slight chance
of showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...South winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Showers likely through early afternoon, then a
chance of showers by mid afternoon. Patchy fog by mid afternoon.
Waves building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. A slight chance of
thunderstorms after midnight. Patchy dense fog after midnight.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering northeast by
mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-021600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
355 AM EDT Tue Jul 2 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves calm to
2 feet building to 1 to 3 feet.
.TODAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of showers through early afternoon.
Showers likely by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet. currently centered over the
Great Lakes shifts east to the Northeast US tonight. Meanwhile, a
29.6 inch low will develop over the Northern Plains. This low will
deepen to 29.3 inches while lifting into northern Ontario by
Tuesday evening.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers through midnight,
then showers after midnight. Patchy fog after midnight. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west in the
afternoon. A slight chance of showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.

$$

LSZ261-021600-
MAFOR 0209/
Superior West 11326 11436 12430 12420 11520 11514. Waves 2 to 3
feet.

Superior North Central 11430 12336 11330 12430 11420 11424. Waves
3 to 6 feet building to 4 to 7 feet today, then subsiding to 3 to
6 feet tonight.

Superior South Central 11320 12436 14430 11420. Waves 2 to 4 feet
building to 3 to 5 feet today, then subsiding to 1 to 3 feet
tonight.

Superior East 11320 12420 11336 11330 11430 11420 11426. Waves 1
to 3 feet building to 3 to 6 feet today, then subsiding to 2 to 4
feet tonight.

$$

WFO MQT

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

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