743
FZUS63 KMQT 181934
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
334 PM EDT Sun Aug 18 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 29.7 inch low over Georgian Bay will move to Lake
Ontario this evening while 30.01 ridging builds over Lake
Superior. This ridge will build to 30.2 inches Monday and 30.3
inches Tuesday. Ridging over the Great Lakes weakens to 30.1
inches afterwards into Friday as the high pressure shifts toward
the east coast and a 29.8 inch trough moves into northern Ontario.

LSZ162-190345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
334 PM EDT Sun Aug 18 2024 /234 PM CDT Sun Aug 18 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast late. Waves
calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots veering southwest. A
chance of showers. Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-190345-
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-
334 PM EDT Sun Aug 18 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight, then veering northeast late. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east late. Waves
calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots diminishing to less than
10 knots late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots veering south 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...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...South winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-190345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
334 PM EDT Sun Aug 18 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots veering north after midnight,
then veering northeast late. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots backing north late. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering east late.
Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds less than 10 knots. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-190345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
334 PM EDT Sun Aug 18 2024

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering northeast late.
Waves subsiding to calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north late.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering east late.
Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming
southwest 10 to 20 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering south. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-190345-
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-
334 PM EDT Sun Aug 18 2024

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast late.
Waves subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight, then becoming east 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY...South winds 10 to 20 knots veering southwest. Waves
subsiding to calm to 2 feet.

$$

LSZ267-190345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
334 PM EDT Sun Aug 18 2024

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast late.
Waves subsiding to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots backing northwest by
mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.

$$

LSZ261-190345-
MAFOR 1821/
Superior West 11500 12600 11400 11100 12110 11210. Waves 2 feet
or less.

Superior North Central 11610 11710 11810 11100 14110. Waves 1 to
3 feet.

Superior South Central 11820 12710 11810 13110 11810. Waves 2 to
4 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet
Monday.

Superior East 11720 11820 11810 11110 12120 12820. Waves 2 to 4
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