399
FZUS63 KMQT 171355
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
955 AM EDT Mon Jun 17 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...Weak ridging of 29.9 inches in the wake of a trough
will be over the lake today while a 29.3 inch low pressure moves
off the Colorado Rockies into the Northern Plains. The low will
track across northern Minnesota at 29.5 inches Tuesday, reaching
James Bay Wednesday morning as it pulls a 29.6 inch trough through
Lake Superior. As the low lifts northeast, high pressure to 30.3
inches builds over Lake Superior for Thursday and Friday.

LSZ162-172200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
955 AM EDT Mon Jun 17 2024 /855 AM CDT Mon Jun 17 2024/

.REST OF TODAY...Southwest winds 5 to 15 knots backing south in
the afternoon, then backing northeast late. A chance of showers
by late morning, then showers likely and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east late.
Showers and a chance of thunderstorms. Waves building to 1 to
3 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then veering south late. A chance of showers
and thunderstorms. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. Showers with thunderstorms likely through
midnight, then a chance of showers and thunderstorms after
midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. A chance of thunderstorms. Showers
likely. Waves calm to 2 feet.

$$

LSZ263-172200-
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-
955 AM EDT Mon Jun 17 2024

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

$$

LSZ264-172200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
955 AM EDT Mon Jun 17 2024

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

$$

LSZ265-172200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
955 AM EDT Mon Jun 17 2024

.REST OF TODAY...West winds 10 to 20 knots becoming southeast
5 to 15 knots in the afternoon, then backing east late. Patchy
fog by late morning. A chance of showers and thunderstorms. Waves
calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. Patchy fog. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers
and thunderstorms. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. A chance
of thunderstorms. Showers likely. Waves calm to 2 feet.

$$

LSZ266-172200-
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-
955 AM EDT Mon Jun 17 2024

.REST OF TODAY...West winds 5 to 15 knots veering northwest in
the afternoon, then veering east late. Patchy fog by late
morning. A chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. Patchy fog. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots late. Waves building to 3 to 5 feet occasionally to
7 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers
and thunderstorms. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers and thunderstorms. Waves subsiding
to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ267-172200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
955 AM EDT Mon Jun 17 2024

.REST OF TODAY...West winds 10 to 20 knots becoming northwest
5 to 15 knots in the afternoon, then veering east late. Areas of
dense fog by late morning. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. Patchy fog. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers
and thunderstorms. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers through early afternoon. A chance
of thunderstorms. Showers likely by mid afternoon. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east. A chance of
showers. Waves calm to 2 feet.

$$
LSZ261-172200-
MAFOR 1715/
Superior West 11500 11406 11100 11116 11216 11226 11210 11320. A
chance of thunderstorms tonight and Tuesday morning. Waves 1 to 3
feet.

Superior North Central 11610 11500 11400 11310 11210 12310 11320.
A chance of showers this afternoon. A chance of showers and
thunderstorms tonight and Tuesday morning. Waves 1 to 3 feet.

Superior South Central 11710 12210 11216 13310 11420. A chance of
thunderstorms this afternoon and tonight. Waves 2 feet or less
this afternoon and tonight. Waves 2 to 3 feet Tuesday morning.

Superior East 11704 11700 12200 11210 12310 11420. A chance of
showers this afternoon. A chance of showers and thunderstorms
tonight and Tuesday morning. Waves 1 to 3 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