755
FZUS63 KMQT 190804
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
404 AM 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 ridge building over the
Upper Great Lakes today will be displaced eastward later tonight
by a 29.7 inch low pressure system lifting northeast through the
Plains which will shift east across the Upper Great Lakes Monday
afternoon and evening. After a period of 29.9 inch ridging late
Monday night into Tuesday morning over Lake Superior, another
29.5 inch low pressure developing over the Plains will deepen to
29.2 inches as it tracks over western and north central Lake
Superior late Tuesday night into Wednesday before weakening to
29.4 inches as it shifts northeast over James Bay on Thursday.

LSZ162-191615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
404 AM EDT Sun May 19 2024 /304 AM CDT Sun May 19 2024/

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Southwest winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south after
midnight, then backing east late. A chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of showers. Waves calm to
2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
rain showers through 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. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Northeast gales to 35 knots. Showers and a
chance of thunderstorms. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...Southwest gales to 35 knots becoming west 15 to
25 knots. Rain showers likely, then 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. A chance of rain showers. Waves subsiding to calm to
2 feet.

$$

LSZ263-191615-
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 Sun May 19 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves 2 to
4 feet.
.TODAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming south 5 to
15 knots after midnight. A slight chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots backing northeast late. 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 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...East winds 20 to 30 knots increasing to gales to
35 knots after midnight. Showers and a chance of thunderstorms.
Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...West gales to 35 knots diminishing to 15 to
25 knots. Rain showers likely and a chance of thunderstorms, then
a chance of rain showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-191615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
404 AM EDT Sun May 19 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves 2 to
4 feet.
.TODAY...Southwest winds 10 to 20 knots. Waves 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing south late. A slight chance
of showers after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east late. 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 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots increasing to gales to
35 knots after midnight. Showers and a chance of thunderstorms.
Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...East winds 20 to 30 knots becoming west 15 to
25 knots. Rain showers likely and a chance of thunderstorms, then
a chance of rain showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ265-191615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
404 AM EDT Sun May 19 2024

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...West winds 5 to 15 knots backing southwest late. Waves
calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots. 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. A chance of showers. A slight chance
of thunderstorms by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North 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. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Showers and a chance of thunderstorms. Waves
building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots diminishing to 15 to
25 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.

$$

LSZ266-191615-
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 Sun May 19 2024

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. Waves 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then backing east late. A chance of
showers through early afternoon, then showers likely 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
slight 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. 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 4 to 7 feet occasionally to
9 feet.
.WEDNESDAY...South winds 20 to 30 knots becoming west 15 to
25 knots. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ267-191615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
404 AM EDT Sun May 19 2024

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TODAY...West winds 5 to 15 knots backing southwest late. Waves
subsiding to calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then diminishing to 5 to 15 knots late. Waves
calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A chance of showers through early
afternoon, then showers likely and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots backing north after
midnight. A chance of rain showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots veering northeast 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 west. Showers
likely, then a chance of showers. Waves subsiding to 3 to 5 feet
occasionally to 7 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.

$$

LSZ261-191615-
MAFOR 1909/
Superior West 14520 11520 11510 11410 11400. Waves 2 to 4 feet
today. Waves 1 to 3 feet tonight.

Superior North Central 11620 12520 12530 11520 12510. Waves 2 to
4 feet today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

Superior South Central 11620 12610 11500 13400 11410. Waves 1 to
3 feet subsiding to 1 foot or less today. Waves 1 foot or less
tonight.

Superior East 11620 11610 12510 12500 12400. Waves 2 to 4 feet
today. Waves 1 to 2 feet tonight.

$$

Voss

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

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