057
FZUS63 KMQT 191943
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
343 PM EDT Sun May 19 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 30.0 inch high pressure overhead will be displaced
eastward later tonight by a 29.7 inch low pressure system lifting
northeast through the Plains. This low pressure shifts east across
the Upper Great Lakes Monday afternoon and evening. A period of
weak 29.9 inch ridging follows for late Monday night into Tuesday
morning over Lake Superior. Another 29.5 inch low pressure
develops over the Plains Tuesday, then deepens to 29.2 inches as
it tracks over western and north central Lake Superior late
Tuesday night into Wednesday. The low continues northeastward
toward James Bay Wednesday and Wednesday night as it weakens to
29.4 inches.

LSZ162-200345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
343 PM EDT Sun May 19 2024 /243 PM CDT Sun May 19 2024/

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing southeast after
midnight, then backing east late. A chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast in the
afternoon. A chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers. A slight
chance of thunderstorms by mid afternoon. Waves building to 7 to
10 feet occasionally to 13 feet.
.TUESDAY NIGHT...Northeast gales to 35 knots. Showers and a
chance of thunderstorms. Waves building to 10 to 14 feet
occasionally to 18 feet.
.WEDNESDAY...North gales to 35 knots backing west by mid
afternoon. Showers likely. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming north 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers, then rain showers likely. Waves building to 1 to
3 feet.

$$

LSZ263-200345-
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-
343 PM EDT Sun May 19 2024

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming south 5 to
15 knots after midnight, then backing southeast late. A slight
chance of showers after midnight. Waves subsiding to calm to
2 feet.
.MONDAY...East winds 5 to 15 knots backing northeast late. A
chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers and a slight
chance of thunderstorms by mid afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming east
gales to 35 knots after midnight. Showers and a chance of
thunderstorms. Waves building to 9 to 12 feet occasionally to
15 feet.
.WEDNESDAY...Southwest winds 20 to 30 knots veering west by mid
afternoon. Showers likely. Waves subsiding to 6 to 9 feet
occasionally to 11 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing east. A chance of
rain showers. Waves building to 1 to 3 feet.

$$

LSZ264-200345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
343 PM EDT Sun May 19 2024

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then becoming south less than 10 knots
late. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots backing east in the
afternoon. A chance of rain showers. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming north less than
10 knots after midnight, then increasing to 5 to 15 knots late.
Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 20 to 30 knots increasing to gales to
35 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. Showers after midnight. Waves building
to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY...Southeast winds 20 to 30 knots veering west by mid
afternoon. Showers likely. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ265-200345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
343 PM EDT Sun May 19 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots backing southeast late. A
slight chance of showers after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. Showers through early afternoon, then
a chance of showers and a slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northwest after
midnight. A slight chance of showers and thunderstorms through
midnight. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of showers by mid afternoon. Waves
calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Showers and a chance of
thunderstorms. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...Southwest winds 20 to 30 knots veering west by mid
afternoon. A chance of showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. A chance of rain
showers. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ266-200345-
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-
343 PM EDT Sun May 19 2024

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing east late. Showers
through early afternoon, then a chance of showers and a slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. A slight chance of thunderstorms through midnight. A
chance of rain showers. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Showers and a chance of
thunderstorms. Waves building to 6 to 9 feet occasionally to
11 feet.
.WEDNESDAY...South winds 20 to 30 knots veering southwest by mid
afternoon. A chance of thunderstorms through early afternoon. A
chance of showers. Waves building to 6 to 10 feet occasionally to
13 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of rain showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots backing southeast. A chance
of rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-200345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
343 PM EDT Sun May 19 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots backing east late. A
chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then backing northwest late. A chance of
rain showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TUESDAY...Northwest winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight. Showers and a chance of
thunderstorms. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...South winds 20 to 30 knots veering southwest by mid
afternoon. Showers likely and a chance of thunderstorms through
early afternoon, then a chance of showers by mid afternoon. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of rain showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet.
.FRIDAY...West winds 10 to 20 knots backing southeast. A chance
of rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ261-200345-
MAFOR 1921/
Superior West 11520 11510 11400 11300 11200 11216 11210 11110.
Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 1 to 2
feet Monday.

Superior North Central 12520 11510 12400 11300 11310 11210. A
chance of showers Monday. Waves 3 to 5 feet subsiding to 1 to 3
feet tonight. Waves 1 to 2 feet Monday.

Superior South Central 11500 14400 11306 11316 11310. Waves 1
foot or less.

Superior East 12500 13400 11300 11316 11216. Waves 1 to 2 feet.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes