802
FZUS63 KMQT 130154
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
954 PM EDT Wed Jun 12 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 pressure system over James Bay drags
a 29.6 inch trough over Lake Superior tonight through Thursday
morning. 30.1 inch ridging moves into the High Plains late
Thursday into Friday, becoming centered over Lake Superior on
Friday afternoon. This high pressure builds to 30.2 inches and
moves over the central Great Lakes Saturday, and will continue
shifting east toward New England on Sunday. Deepening low pressure
near 29.2 inches emerges out of the High Plains, moving northeast
towards the Hudson Bay Sunday into Monday, extending a 29.6 inch
trough over Lake Superior.

LSZ162-131000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
954 PM EDT Wed Jun 12 2024 /854 PM CDT Wed Jun 12 2024/

.REST OF TONIGHT...South winds 10 to 20 knots veering west late.
A chance of thunderstorms by late evening. A chance of showers. A
chance of thunderstorms after midnight. Patchy fog after
midnight. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. Patchy fog through early
afternoon. A slight chance of showers and thunderstorms. Waves
building to 1 to 3 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then veering north late. Waves
subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers through midnight,
then showers likely after midnight. Waves building to 1 to
3 feet.
.SUNDAY...East winds 10 to 20 knots veering west. A chance of
showers and thunderstorms. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-131000-
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-
954 PM EDT Wed Jun 12 2024

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

$$

LSZ264-131000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
954 PM EDT Wed Jun 12 2024

.REST OF TONIGHT...South winds 5 to 15 knots veering west late. A
chance of showers and thunderstorms. Patchy fog after midnight.
Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Patchy dense fog through
early afternoon. A slight chance of showers and thunderstorms.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots veering north late.
Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A chance of
showers. Waves building to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ265-131000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
954 PM EDT Wed Jun 12 2024

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

$$

LSZ266-131000-
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-
954 PM EDT Wed Jun 12 2024

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers and thunderstorms. Waves calm
to 2 feet building to 1 to 3 feet, then subsiding to calm to
2 feet.
.THURSDAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering northwest late. A slight
chance of showers and thunderstorms. Waves building to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots backing southeast
after midnight. A chance of showers. Waves building to 2 to
4 feet.
.SUNDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ267-131000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
954 PM EDT Wed Jun 12 2024

.REST OF TONIGHT...South winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet building to 1 to
3 feet, then subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. A chance of showers and thunderstorms.
Waves building to 2 to 4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. A chance of showers and thunderstorms. Waves building
to 2 to 4 feet, then subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$
LSZ261-131000-
MAFOR 1303/
Superior West 12510 14620 11620 11610. A chance of showers and
thunderstorms overnight. Waves 1 to 3 feet.

Superior North Central 11516 11510 11610 11620 19624 11620 11730
11620 11610. A chance of thunderstorms overnight. Waves 1 to 3
feet.

Superior South Central 11519 12510 12620 11730 11720 11710. Waves
1 to 3 feet.

Superior East 11420 11520 12510 12620 12720. A chance of showers
and thunderstorms overnight and Thursday morning. Waves 2 to 4
feet.

$$

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