420
FZUS63 KMQT 151957
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
357 PM EDT Sat Jun 15 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...High pressure of 30.2 inches is over Lake Huron today,
continuing on toward New England Sunday. Deepening low pressure
near 29.4 inches tracks out of the High Plains Saturday night,
spinning northeast towards northern Manitoba 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 around 29.3 inches looks to move off the Colorado Rockies
into the Northern Plains early next week. The low will track
across northern Minnesota at 29.5 inches Tuesday, reaching James
Bay Wednesday morning. This low will pull a 29.8 inch trough
through Lake Superior Wednesday morning. As the low lifts
northeast, high pressure to 30.4 inches builds over Lake Superior
Thursday.

LSZ162-160400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
357 PM EDT Sat Jun 15 2024 /257 PM CDT Sat Jun 15 2024/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. A slight chance
of showers. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots backing east after
midnight. Showers. A slight chance of thunderstorms after
midnight. Waves building to 2 to 4 feet.
.SUNDAY...Northeast winds 10 to 20 knots veering east late. A
chance of showers and a slight chance of thunderstorms. Waves
subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming west 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
A chance of showers and thunderstorms. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Showers likely and a chance of
thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots veering east after
midnight. Showers and thunderstorms likely through midnight, then
a chance of showers and thunderstorms after midnight. Waves
building to 1 to 3 feet.
.TUESDAY...East winds 15 to 25 knots veering south by mid
afternoon. A chance of showers and thunderstorms. Waves 1 to
3 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ263-160400-
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-
357 PM EDT Sat Jun 15 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots becoming southeast 15 to
25 knots late. A chance of showers through midnight, then showers
and a slight chance of thunderstorms after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...South winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of showers and a slight chance of
thunderstorms through early afternoon. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight, then veering west late. A slight chance of
showers and thunderstorms. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots veering northeast by mid
afternoon. A chance of showers through early afternoon. A chance
of thunderstorms. Showers likely by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers and thunderstorms.
Waves building to 1 to 3 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 1 to
3 feet.
.WEDNESDAY...West winds 5 to 15 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-160400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
357 PM EDT Sat Jun 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 10 to 20 knots becoming southeast 15 to
25 knots late. A slight chance of showers through midnight, then
showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 20 to 30 knots becoming south 15 to
25 knots in the afternoon, then diminishing to 5 to 15 knots
late. A chance of showers and a slight chance of thunderstorms
through early afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then veering west late. A chance of showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing east by mid afternoon.
A chance of showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. A chance of showers and thunderstorms. Waves calm to
2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers and thunderstorms. Waves 2 to
4 feet.
.WEDNESDAY...West winds 5 to 15 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering east. Waves calm to
2 feet.

$$

LSZ265-160400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
357 PM EDT Sat Jun 15 2024

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 15 to 25 knots backing southeast late. A
chance of showers through midnight, then showers after midnight.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 25 knots veering south in the
afternoon, then becoming southeast 10 to 20 knots late. A chance
of showers and a slight chance of thunderstorms through early
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots late. A chance of showers and thunderstorms. Waves
subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers and thunderstorms. Waves calm
to 2 feet.
.TUESDAY...South winds 15 to 25 knots. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-160400-
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-
357 PM EDT Sat Jun 15 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 15 to 25 knots backing southeast late. A
slight chance of showers through midnight, then showers after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 20 to 30 knots veering south in the
afternoon, then diminishing to 15 to 25 knots late. Showers
through early afternoon. A slight chance of thunderstorms. A
slight chance of showers by mid afternoon. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of showers and thunderstorms. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. 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 by mid afternoon. 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 subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ267-160400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
357 PM EDT Sat Jun 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of showers after midnight.
Waves building to 2 to 4 feet.
.SUNDAY...Southeast winds 20 to 30 knots veering south in the
afternoon, then diminishing to 15 to 25 knots late. Showers
through early afternoon. A slight chance of thunderstorms. A
chance of showers by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding 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 backing southeast by mid
afternoon. A chance of showers and thunderstorms. Waves calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves building to 1 to 3 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.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots veering northwest. A
chance of showers and thunderstorms. Waves subsiding to calm to
2 feet.
.THURSDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ261-160400-
MAFOR 1521/
Superior West 11200 11310 11416 12326 11320 11410 11310. Waves 1
to 4 feet.

Superior North Central 11330 11320 11430 11420 12346 11340 11420.
Waves 1 to 3 feet building to 3 to 5 feet tonight. Waves 4 to 7
feet building to 5 to 9 feet Sunday.

Superior South Central 11330 12420 11326 12346 12430. Waves 2 to
4 feet tonight. Waves 3 to 6 feet Sunday.

Superior East 11310 11420 11320 11420 11336 12346 11430. Waves 2
to 5 feet tonight building to 5 to 8 feet Sunday.

$$

GS

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

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