292
FZUS63 KMQT 131951
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 PM EDT Mon May 13 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 30.2 inch high pressure over western Hudson Bay
is extending a 29.9 inch ridge over western Lake Superior this
afternoon. This ridge builds to 30.0 inches tonight and will
remain over Lake Superior until Wednesday night. Meanwhile, a
29.7 inch trough emerging over the Northern Plains on Tuesday
weakens to 29.8 inches as it shifts to the Upper Mississippi
Valley during Wednesday night and Thursday. The trough deepens to
29.7 inches over Lake Superior Thursday night and remains through
Friday. As the trough arrives in James Bay midday Saturday, weak
ridging of 29.8 inches will be over the lake as another low
pressure transits through the Northern Plains.

LSZ162-140400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 PM EDT Mon May 13 2024 /251 PM CDT Mon May 13 2024/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
rain showers through midnight, then rain showers likely after
midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. Rain showers likely through early afternoon, then a
chance of rain showers by mid afternoon. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots becoming
northwest 5 to 15 knots after midnight. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots backing northeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-140400-
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-
351 PM EDT Mon May 13 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots backing north after midnight,
then veering northeast late. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight, then diminishing to less than 10 knots late. Waves calm
to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing east. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering west. A chance of
rain showers. Waves calm to 2 feet.

$$

LSZ264-140400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 PM EDT Mon May 13 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Northwest winds less than 10 knots veering north
after midnight, then veering east late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southeast. A chance of
rain showers. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.

$$

LSZ265-140400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 PM EDT Mon May 13 2024

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.TUESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering
southwest after midnight. A chance of rain showers. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of showers. Waves calm to 2 feet.

$$

LSZ266-140400-
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-
351 PM EDT Mon May 13 2024

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northwest late. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain showers. Waves calm
to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of rain showers.
Waves calm to 2 feet.

$$

LSZ267-140400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 PM EDT Mon May 13 2024

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north after
midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ261-140400-
MAFOR 1321/
Superior West 11310 11200 14100 12200. Waves 1 foot or less.

Superior North Central 12720 13810 12800 11700. Waves 2 feet or
less.

Superior South Central 11820 11720 11710 11810 14800. Waves 1 to
3 feet.

Superior East 12730 11820 13810 11800 11710. Waves 1 to 4 feet.

$$

GS

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

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