079
FZUS63 KMQT 010804
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
404 AM EDT Wed May 1 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 29.6 inch low pressure currently near Duluth, MN
tracks east across southern Lake Superior today while weakening to
29.7 inches. Ridging builds to 30.1 inches over the Upper Great
Lakes tonight then shifts east on Thursday as a 29.8 inch low
pressure tracks across the Upper Mississippi Valley. The low then
lifts northeast over northwestern Ontario while deepening to 29.7
inches on Friday. A weak 30.0 inch trough pivots across the lake
Saturday morning ahead of ridging that builds to 30.1 inches by
Saturday evening then persists through Sunday.

LSZ162-011615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
404 AM EDT Wed May 1 2024 /304 AM CDT Wed May 1 2024/

.EARLY THIS MORNING...Northeast winds 20 to 30 knots. Patchy fog.
Rain showers. Waves 5 to 9 feet occasionally to 11 feet.
.TODAY...North winds 15 to 25 knots backing west in the
afternoon, then diminishing to 10 to 20 knots late. A slight
chance of rain showers. Waves subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 20 to
30 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY NIGHT...East winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Rain showers through midnight, then a
chance of rain showers after midnight. Waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. A chance
of rain showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.

$$

LSZ263-011615-
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-
404 AM EDT Wed May 1 2024

.EARLY THIS MORNING...East winds 15 to 25 knots. Patchy fog. Rain
showers. Waves 3 to 6 feet occasionally to 8 feet building to
4 to 7 feet occasionally to 9 feet.
.TODAY...East winds 15 to 25 knots becoming west 20 to 30 knots
in the afternoon, then diminishing to 10 to 20 knots late. A
chance of rain showers. Waves subsiding to 2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots late. A chance of rain showers by mid afternoon. Waves
building to 2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers and a slight chance of
thunderstorms. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 20 to 30 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west. Waves
subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ264-011615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
404 AM EDT Wed May 1 2024

.EARLY THIS MORNING...East winds 15 to 25 knots. Patchy fog. Rain
showers. Waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet.
.TODAY...East winds 15 to 25 knots becoming northwesterly late.
Patchy fog through early afternoon. Rain showers through early
afternoon, then a chance of rain showers by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...North winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then veering east late. A chance
of rain showers by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots by mid afternoon. A chance of rain showers through early
afternoon. Waves 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots becoming southwest
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west. Waves
subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ265-011615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
404 AM EDT Wed May 1 2024

.EARLY THIS MORNING...East winds 15 to 25 knots. Patchy fog. Rain
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...Southeast winds 15 to 25 knots veering west in the
afternoon, then increasing to 20 to 30 knots with a few gale force
gusts to 35 knots possible late. Patchy fog through early
afternoon. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. A chance of
rain showers by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. Rain showers. A slight chance of thunderstorms
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...South winds 10 to 20 knots veering southwest by mid
afternoon. A chance of rain showers through early afternoon.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. A chance
of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.

$$

LSZ266-011615-
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-
404 AM EDT Wed May 1 2024

.EARLY THIS MORNING...East winds 15 to 25 knots. Patchy fog. Rain
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...Southeast winds 15 to 25 knots veering southwest in the
afternoon, then becoming west 20 to 30 knots with a few gale
force gusts to 35 knots possible late. Patchy fog through early
afternoon. Rain showers through early afternoon, then a slight
chance of rain showers by mid afternoon. Waves building to 3 to 6
feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering northeast in
the afternoon, then veering east late. A chance of rain showers
by mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming southeast
20 to 30 knots after midnight. Rain showers. A slight chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...South winds 15 to 25 knots. A chance of rain showers
through early afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. A chance
of rain showers. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.

$$

LSZ267-011615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
404 AM EDT Wed May 1 2024

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. Patchy fog.
A chance of rain showers. Waves calm to 2 feet building to 1 to
3 feet.
.TODAY...Southeast winds 15 to 25 knots veering south in the
afternoon, then becoming west 20 to 30 knots late. Patchy fog
through early afternoon. Rain showers through early afternoon,
then a slight chance of rain showers by mid afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots becoming northwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 2 to 4 feet.
.THURSDAY...West winds 5 to 15 knots veering north in the
afternoon, then veering east late. A slight chance of rain
showers by mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight. Rain showers. A slight chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 20 to 30 knots diminishing to 10 to
20 knots by mid afternoon. A chance of rain showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots backing northwest. A
chance of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ261-011615-
MAFOR 0109/
Superior West 11246 11130 11730 12620 12710 11700. Waves 5 to 9
feet subsiding to 3 to 6 feet today. Waves 2 to 4 feet subsiding
to 1 to 2 feet tonight.

Superior North Central 13236 11830 12730 12710. Waves 2 to 3 feet
building to 3 to 6 feet today then subsiding to 2 to 4 feet
tonight.


Superior South Central 11336 11326 11520 13640 11720 11610. Waves
2 to 3 feet building to 3 to 6 feet today. Waves 4 to 7 feet
subsiding to 1 to 3 feet tonight.

Superior East 11330 11336 11330 11530 11640 11740 12720. Waves 2
to 4 feet building to 3 to 5 feet today. Waves 5 to 8 feet
tonight.

$$

EK

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

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