698
FZUS63 KMQT 150745
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
345 AM EDT Sun Sep 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...As 30.3 inch high pressure over Maine anchors
offshore of the New England Coast today through Wednesday, it will
extend 30.1 inch ridging back into the Great Lakes region.
Meanwhile, a 29.9 inch low pressure trough across south central
Canada and the Dakotas today will drift into northern Ontario on
Monday before dissipating. A 29.4 inch trough will then emerge over
the western Great Plains on Tuesday. Low pressure of 29.3 inches
will develop along this trough and then lift into Saskatchewan on
Wednesday. On Thursday, the low will drift into northern Manitoba
while 30.1 inch ridging extends from Quebec into the Great Lakes
region.

LSZ162-151545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
345 AM EDT Sun Sep 15 2024 /245 AM CDT Sun Sep 15 2024/

.EARLY THIS MORNING...South winds 5 to 15 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots backing northeast in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering southwest late.
A chance of showers and a slight chance of thunderstorms after
midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then backing east late. A chance of showers and a
slight chance of thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-151545-
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-
345 AM EDT Sun Sep 15 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots backing southeast late.
Isolated showers through early afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of showers and thunderstorms after midnight. Waves
calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ264-151545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
345 AM EDT Sun Sep 15 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Scattered
showers. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TODAY...South winds 5 to 15 knots backing southeast late.
Isolated showers through early afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of showers and thunderstorms after midnight. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers and thunderstorms. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ265-151545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
345 AM EDT Sun Sep 15 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. Scattered
showers. Waves calm to 2 feet.
.TODAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest late.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming southeast 5 to
15 knots late. A slight chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers and thunderstorms through midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ266-151545-
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-
345 AM EDT Sun Sep 15 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Scattered
showers. Waves 1 to 3 feet.
.TODAY...South winds 10 to 20 knots backing southeast late.
Isolated showers through early afternoon. Waves subsiding to calm
to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. A slight chance of showers.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers and
thunderstorms. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots becoming southeast 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ267-151545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
345 AM EDT Sun Sep 15 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...South winds 10 to 20 knots backing southeast in the
afternoon, then veering south late. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY...South winds 10 to 20 knots backing southeast late.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots becoming southeast 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-151545-
MAFOR 1509/
Superior West 13400 11300 11200 11310 11410 11510. Waves 2 feet
or less.

Superior North Central 12410 19416 12410 11310 12410 11510. Waves
1 to 3 feet.

Superior South Central 11410 19416 13310 11320 11420 12410.
Waves 1 to 3 feet.

Superior East 13410 12310 13420. Waves 1 to 4 feet.

$$

Rolfson

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

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