977
FZUS63 KMQT 031343
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 AM EDT Wed Jul 3 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 29.3 inch low continues its east-northeast
advancement toward Hudson Bay this morning as it drags a 29.7 inch
trough across Lake Superior. In its wake, a weak 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 Great Lakes region on Friday.
The low continues northeast over the Great Lakes, reaching Quebec
by Saturday afternoon. Then a 29.8 inch trough approaches the
western Great Lakes on Sunday.



LSZ162-032145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 AM EDT Wed Jul 3 2024 /843 AM CDT Wed Jul 3 2024/

.REST OF TODAY...Southwest winds 15 to 25 knots veering west
late. A slight chance of showers by mid afternoon. Waves 1 to
3 feet building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. A slight chance of showers through midnight.
Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing south in the
afternoon, then backing east late. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A slight chance of showers and
thunderstorms. Waves calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering west. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-032145-
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-
943 AM EDT Wed Jul 3 2024

.REST OF TODAY...Southwest winds 10 to 20 knots veering west
late. Patchy dense fog by late morning. A slight chance of
showers by mid afternoon. Waves 1 to 3 feet building to 3 to
5 feet occasionally to 7 feet.
.TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.THURSDAY...West winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight. A slight chance of showers. A slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ264-032145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 AM EDT Wed Jul 3 2024

.REST OF TODAY...Southwest winds 10 to 20 knots. Patchy fog by
late morning. A slight chance of showers by mid afternoon. Waves
1 to 3 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then becoming southwest less than
10 knots late. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds less than 10 knots increasing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest. Waves calm
to 2 feet.

$$

LSZ265-032145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 AM EDT Wed Jul 3 2024

.REST OF TODAY...West winds 10 to 20 knots. A slight chance of
showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots veering northeast in the
afternoon, then veering east late. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers after midnight. 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 through early
afternoon, then showers likely by mid afternoon. Waves calm to
2 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. A chance of showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers and thunderstorms. Waves calm to
2 feet.

$$

LSZ266-032145-
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-
943 AM EDT Wed Jul 3 2024

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

$$

LSZ267-032145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 AM EDT Wed Jul 3 2024

.REST OF TODAY...Southwest winds 10 to 20 knots veering west in
the afternoon. Waves calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering west after
midnight, then diminishing to 5 to 15 knots late. A slight chance
of showers through midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west in the
afternoon, then veering northwest late. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots
by mid afternoon. A chance of showers through early afternoon,
then showers by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Showers likely
through midnight. A chance of showers after midnight. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.

$$
LSZ261-032145-
MAFOR 0315/
Superior West 12520 11620 11610 14600. Waves 3 to 5 feet this
afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.
Waves 1 foot or less Thursday morning.

Superior North Central 11520 12530 11620 11610 12600 11700. Waves
2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5
feet subsiding to 2 to 3 feet tonight. Waves 1 to 3 feet Thursday
morning.

Superior South Central 15610 11600 11700. Waves 2 feet or less.

Superior East 14510 11510 11610 12700. Waves 1 to 2 feet.

$$

LC

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

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