335
FZUS63 KMQT 131941
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
341 PM EDT Thu Jun 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 29.7 inch trough over Lake Superior this afternoon
gives way to ridging the rest of today through Friday, with the
ridging building to 30.1 inches over the lake by Friday afternoon.
This high pressure continues building to 30.2 inches as it moves
over the central Great Lakes Saturday, and continues shifting east
toward New England on Sunday. Deepening low pressure near 29.4
inches emerges out of the High Plains Saturday night, moving
northeast towards Hudson Bay Sunday into Monday as it deepens to
29.0 inches. This low extends a 29.6 inch trough over Lake
Superior Sunday night before weak ridging of 29.9 inches moves
over Lake Superior from the Northern Plains Monday. A low pressure
of at least 29.5 inches looks to move off the Colorado Rockies
into the Northern Plains early next week.


LSZ162-140345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
341 PM EDT Thu Jun 13 2024 /241 PM CDT Thu Jun 13 2024/

.LATE THIS AFTERNOON...West winds 15 to 25 knots. A slight chance
of showers and thunderstorms. Waves 1 to 3 feet subsiding to calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. A slight
chance of showers and thunderstorms through midnight. Waves calm
to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers 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 calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots veering northeast. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.

$$

LSZ263-140345-
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-
341 PM EDT Thu Jun 13 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. A slight chance
of showers and thunderstorms. Waves 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. A slight
chance of showers and thunderstorms through midnight. Waves
subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots increasing 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...Southeast winds 10 to 20 knots veering south by mid
afternoon. A chance of showers. Waves 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing east. A chance of
showers. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ264-140345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
341 PM EDT Thu Jun 13 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog. A
chance of showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Patchy
fog through midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering south late. 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 becoming southeast 10 to
20 knots by mid afternoon. Waves building to 1 to 3 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. A chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. 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.
.TUESDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves building to 1 to 3 feet.

$$

LSZ265-140345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
341 PM EDT Thu Jun 13 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. A slight
chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots becoming southeast 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. Showers likely through
early afternoon. A chance of thunderstorms. A chance of showers
by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing south. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-140345-
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-
341 PM EDT Thu Jun 13 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. A chance
of showers. Waves 1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots. A slight chance of
showers through midnight. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest late. Waves
subsiding to 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 building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. A chance of showers
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Showers likely through early
afternoon. A chance of showers by mid afternoon. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers and thunderstorms.
Waves subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet.

$$

LSZ267-140345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
341 PM EDT Thu Jun 13 2024

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing west after
midnight, then veering northwest late. Patchy fog. Waves
subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest in the
afternoon, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing south late.
Waves subsiding to 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...South winds 10 to 20 knots backing southeast
after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 25 knots. Showers likely through
early afternoon, then a chance of showers by mid afternoon. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers and thunderstorms.
Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet.

$$

LSZ261-140345-
MAFOR 1321/
Superior West 11620 11610 12700 11800 11100 11200 11300. Waves 1
to 3 feet tonight. Waves 1 foot or less Friday.

Superior North Central 11620 12610 11710 11810 11110 11100 11400.
A chance of showers this evening. Waves 1 to 2 feet.

Superior South Central 11810 11710 11700 11600 11710 12810 11800.
Waves 1 to 3 feet.

Superior East 11720 12710 11700 11710 11810 11800 11710. Waves 1
to 3 feet.

$$

BW

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

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