513
FZUS63 KMQT 200746
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 AM EDT Thu Jun 20 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 30.3 inches centered over northern
Minnesota will build to 30.4 inches as it shifts east, settling
over Lake Superior for Thursday and Thursday night. On Friday,
30.3 inch high pressure ridging will extend from Maine to Lake
Superior while 29.7 inch low pressure develops over eastern
Colorado. This low will track northeast to northern Wisconsin on
Saturday as the high pressure ridge drifts northeast. The low will
then deepen to 29.4 inches as it tracks across Upper Michigan and
southeast Lake Superior during Saturday night and reaches
southern Quebec by Sunday evening. In its wake, 29.9 inch high
pressure building into the Northern Plains on Sunday will settle
over the western Great Lakes region on Monday.


LSZ162-201600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 AM EDT Thu Jun 20 2024 /246 AM CDT Thu Jun 20 2024/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers. Waves calm
to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of showers. A slight chance
of thunderstorms by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers through midnight. A
chance of thunderstorms. Showers likely after midnight. Waves
building to 1 to 3 feet.
.SATURDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots backing west
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
A chance of showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-201600-
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-
346 AM EDT Thu Jun 20 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots veering east late. A
slight chance of showers. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots diminishing to less than
10 knots late. A slight chance of showers after midnight. Waves
calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing northeast in the
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers and
a slight chance of thunderstorms. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. Showers. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ264-201600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 AM EDT Thu Jun 20 2024

.EARLY THIS MORNING...North winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds less than 10 knots veering east in the
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds less than 10 knots. Waves calm to 2 feet.
.FRIDAY...East winds less than 10 knots increasing to 5 to
15 knots in the afternoon. A slight chance of showers. Waves calm
to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers. A
slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.SATURDAY...East winds 10 to 20 knots. Showers likely. Waves calm
to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. A chance of showers. Waves building to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-201600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 AM EDT Thu Jun 20 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots. A slight chance of
showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight, then showers likely and a slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots backing
northwest after midnight. A chance of showers. Waves calm to
2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-201600-
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-
346 AM EDT Thu Jun 20 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots. A slight chance of showers by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots. A slight chance of showers
after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers. A
slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Showers. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots backing northwest
after midnight. A chance of showers. Waves building to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming south 10 to 20 knots.
A chance of showers. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.

$$

LSZ267-201600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 AM EDT Thu Jun 20 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots. A slight chance of showers by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight, then veering north late. A slight chance of showers.
Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots. Showers likely through
early afternoon, then showers by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots backing northwest
after midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves building
to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.

$$

LSZ261-201600-
MAFOR 2009/
Superior West 13100 13110 12100. Waves 1 foot or less.

Superior North Central 11800 11100 12200 11300 11100 12200. Waves
2 feet or less.

Superior South Central 11800 15100 11100. Waves 1 foot or less.

Superior East 14800 12810 12800. Waves 1 to 2 feet.

$$

WFO MQT

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

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