287
FZUS63 KMQT 141402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EDT Thu May 14 2026

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...

30.1 inch ridging over Lake Superior today will be pressed southeast
tonight into Friday as a 29.1 inch low moves from the Canadian
Prairies to northern Ontario. This low is expected to bring
troughing of 29.6 inches over Lake Superior late Friday into
Saturday as it tracks to near James Bay at 29.2 inches by Saturday
morning. Ridging of 30.1 inches builds over the lake from northern
Ontario Saturday night into Sunday. This is followed by another 29.7
inch trough extending northeast toward the Upper Great Lakes from
the central Plains by Monday midday, which lingers over the area
through Tuesday.


LSZ162-142000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EDT Thu May 14 2026 /902 AM CDT Thu May 14 2026/

.REST OF TODAY...East winds 10 to 20 knots increasing to 15 to
25 knots late. Waves calm to 2 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TONIGHT...East winds 10 to 20 knots becoming south 15 to
25 knots after midnight. A chance of rain showers. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast gales to 35 knots. A chance of rain showers.
A chance of thunderstorms. Rain showers. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...Northeast winds 20 to 30 knots becoming northwest 10 to
20 knots. Rain showers. Waves subsiding to 2 to 4 feet.

$$

LSZ263-142000-
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-
1002 AM EDT Thu May 14 2026

.REST OF TODAY...East winds less than 10 knots increasing to
10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 15 to 25 knots veering south after
midnight, then increasing to 20 to 30 knots late. A chance of
rain showers through midnight. Rain showers likely after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...Northeast winds 20 to 30 knots becoming east gales to
35 knots. Rain showers likely and a chance of thunderstorms.
Waves building to 4 to 8 feet occasionally to 10 feet.
.MONDAY...East gales to 35 knots becoming west 15 to 25 knots.
Rain showers. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-142000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EDT Thu May 14 2026

.REST OF TODAY...Southeast winds less than 10 knots increasing to
10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 20 to 30 knots becoming south 15 to
25 knots after midnight. A slight chance of rain showers through
midnight, then rain showers likely after midnight. Waves building
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest in the
afternoon. A slight chance of rain showers through early
afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to
3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to gales to
40 knots. Rain showers likely and a chance of thunderstorms.
Waves building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...East gales to 40 knots becoming northwest 15 to
25 knots. Rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ265-142000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EDT Thu May 14 2026

.REST OF TODAY...East winds 5 to 15 knots becoming southeast
10 to 20 knots late. Waves calm to 2 feet building to 1 to
3 feet.
.TONIGHT...Southeast winds 15 to 25 knots veering south after
midnight. A chance of rain showers after midnight. Waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest late. A
chance of showers. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 20 to 30 knots.
Rain showers likely and a chance of thunderstorms. Waves building
to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Southeast gales to 35 knots becoming west 15 to
25 knots. Rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-142000-
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-
1002 AM EDT Thu May 14 2026

.REST OF TODAY...East winds 5 to 15 knots veering southeast in
the afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 15 to 25 knots becoming south 20 to
30 knots after midnight. A chance of rain showers after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots. A chance of rain showers.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SATURDAY...West winds 15 to 25 knots. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming east gales to
40 knots. Rain showers likely. Waves subsiding to calm to 2 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Southeast gales to 45 knots becoming south 20 to
30 knots. Rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-142000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EDT Thu May 14 2026

.REST OF TODAY...North winds 5 to 15 knots backing northwest in
the afternoon, then diminishing to less than 10 knots late. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight. A slight chance of rain showers after
midnight. Waves building to 2 to 4 feet.
.FRIDAY...South winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of rain showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming southeast gales to
35 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Southeast gales to 40 knots becoming southwest 15 to
25 knots. Rain showers likely. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ261-142000-
MAFOR 1415/
Superior West 11210 12220 11320 13430 11530. A chance of showers
tonight. Waves 1 to 3 feet this afternoon. Waves 2 to 4 feet
tonight and Friday morning.

Superior North Central 11300 11310 11320 11330 11340 11436 11446
11440. Waves 1 to 2 feet this afternoon. Waves 1 to 3 feet
building to 3 to 6 feet tonight. Waves 3 to 6 feet Friday
morning.

Superior South Central 11300 11310 12320 12430 11446 11440. Waves
2 feet or less this afternoon. Waves 1 to 3 feet building to 3 to
5 feet tonight. Waves 3 to 5 feet Friday morning.

Superior East 11100 11500 11400 11310 11320 11430 11440 11446.
Waves 1 to 2 feet this afternoon. Waves 1 to 3 feet building to 2
to 4 feet tonight. Waves 3 to 6 feet Friday morning.

$$

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