733
FZUS63 KMQT 151941
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
341 PM EDT Thu Aug 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...Lake Superior is currently between a 30.0 inch high
over the Lower Great Lakes and a 29.7 inch low over northern
Minnesota. While the high continues to shift east over the
Atlantic Coast tonight, the low will move over the Upper Great
Lakes region by Friday. The low will maintain 29.7 inches as it
slides over the Michigan Lower Peninsula Saturday morning and over
the Lower Great Lakes Sunday morning. In it`s wake, weak ridging
of 30.0 inches moves back over Lake Superior by Sunday, building
to near 30.2 inches Monday. The 30.2 inch ridge remains until
Tuesday.

LSZ162-160345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
341 PM EDT Thu Aug 15 2024 /241 PM CDT Thu Aug 15 2024/

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

$$

LSZ263-160345-
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 Aug 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Showers
and a slight chance of thunderstorms. Waves 2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots. Showers through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast in the
afternoon. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then becoming north 10 to 20 knots
late. A slight chance of showers and thunderstorms. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.SATURDAY...North winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.TUESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-160345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
341 PM EDT Thu Aug 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A chance
of showers. Waves 2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers. A slight chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. A chance
of showers and a slight chance of thunderstorms. Waves subsiding
to 2 to 4 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing north late.
A slight chance of thunderstorms through midnight. A slight
chance of showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves building to
1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-160345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
341 PM EDT Thu Aug 15 2024

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. A chance
of showers. Waves 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots backing southeast after
midnight. Showers and a chance of thunderstorms. Waves subsiding
to 1 to 3 feet, then building to 3 to 5 feet occasionally to
7 feet.
.FRIDAY...Southeast winds 10 to 20 knots backing east late. A
chance of showers and thunderstorms. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...North winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-160345-
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 Aug 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A slight
chance of showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then backing southeast 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.
.FRIDAY...Southeast winds 10 to 20 knots backing east late. A
chance of showers and a slight chance of thunderstorms. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots backing northeast after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to 1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots. A slight chance of
thunderstorms through early afternoon. A slight chance of
showers. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots. Waves 1 to 3 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ267-160345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
341 PM EDT Thu Aug 15 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then becoming southeast 15 to 25 knots late. A slight
chance of showers through midnight, then showers likely and a
slight chance of thunderstorms after midnight. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots late. A chance of showers and thunderstorms. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots backing northeast late.
A chance of showers and thunderstorms. Waves subsiding to calm to
2 feet.
.SATURDAY...Northeast winds 10 to 20 knots backing north by mid
afternoon. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots. Waves 1 to 3 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots. Waves 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots veering northeast. Waves
subsiding to calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots veering south. Waves calm
to 2 feet.

$$

LSZ261-160345-
MAFOR 1521/
Superior West 11326 11336 11320 12310 11210 11110 11120. A chance
of thunderstorms tonight and Friday morning. Waves 1 to 4 feet.

Superior North Central 12320 11436 12336 11330 11320 11210. Waves
2 to 4 feet building to 3 to 6 feet tonight and Friday.

Superior South Central 11320 11426 12336 11330 11320 11310 11200.
Waves 2 to 5 feet tonight subsiding to 1 to 3 feet Friday.

Superior East 12310 11410 11326 11336 12330 11320. Waves 1 to 4.

$$

GS

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

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