732
FZUS63 KMQT 290153
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
953 PM EDT Sun Apr 28 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...As 30.5 inch high pressure builds over James Bay
tonight, a 29.6 inch low pressure will lift northeast from Iowa
towards Lake Superior. This low will cross western Lake Superior
late Monday afternoon and evening. As the low weakens to 29.7
inches while moving over northern Ontario late Monday night, a
weak 29.9 inch ridge will shift east across the Mississippi
Valley. On Tuesday, the ridge will move toward the Appalachians as
the next low pressure of 29.6 inches tracks from the Dakotas to
northern Minnesota. This low will pass just north of Lake Superior
on Wednesday. In its wake, a 29.9 inch ridge will shift east to
the western Great Lakes for Wednesday evening. Overnight Wednesday
through Thursday, a 29.4 inch Colorado Low will weaken to 29.6
inches as it lifts to the Upper Midwest Thursday and Friday.

LSZ162-291000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
953 PM EDT Sun Apr 28 2024 /853 PM CDT Sun Apr 28 2024/

...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...East gales to 40 knots. A chance of rain
showers by late evening, then rain showers after midnight. Waves
9 to 12 feet occasionally to 15 feet building to 10 to 14 feet
occasionally to 18 feet.
.MONDAY...Northeast gales to 40 knots diminishing to 20 to
30 knots late. Rain showers likely. Waves subsiding to 6 to
9 feet occasionally to 11 feet.
.MONDAY NIGHT...North winds 10 to 20 knots backing west after
midnight. A chance of rain showers. Waves subsiding to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Rain showers. Waves building to 2 to
4 feet.
.WEDNESDAY...Southwest gales to 35 knots. Waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 1 to
3 feet.
.FRIDAY...North winds 20 to 30 knots. A chance of rain showers.
Waves building to 2 to 4 feet.

$$

LSZ263-291000-
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-
953 PM EDT Sun Apr 28 2024

...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...East gales to 40 knots. A chance of rain
showers by late evening, then rain showers after midnight. Waves
6 to 9 feet occasionally to 11 feet building to 10 to 14 feet
occasionally to 18 feet.
.MONDAY...East gales to 40 knots diminishing to 20 to 30 knots
late. Rain showers. Waves subsiding to 7 to 10 feet occasionally
to 13 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots becoming west 5 to
15 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight. A chance of rain showers through
midnight, then rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest gales to 35 knots. Waves building to 4 to
8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.FRIDAY...North winds 15 to 25 knots. A chance of rain showers.
Waves building to 2 to 4 feet.

$$

LSZ264-291000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
953 PM EDT Sun Apr 28 2024

...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...East winds 20 to 30 knots increasing to gales
to 40 knots after midnight. A chance of rain showers. Waves 4 to
7 feet occasionally to 9 feet building to 10 to 14 feet
occasionally to 18 feet.
.MONDAY...East gales to 40 knots diminishing to 20 to 30 knots
late. Rain showers. Waves subsiding to 7 to 10 feet occasionally
to 13 feet.
.MONDAY NIGHT...East winds 15 to 25 knots becoming southwest 5 to
15 knots after midnight, then veering west late. A chance of rain
showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots increasing to
20 to 30 knots after midnight. Rain showers likely after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest gales to 35 knots. A chance of rain
showers through early afternoon. Waves building to 5 to 9 feet
occasionally to 11 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.FRIDAY...Northeast winds 15 to 25 knots backing northwest. A
chance of rain showers. Waves building to 2 to 4 feet.

$$

LSZ265-291000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
953 PM EDT Sun Apr 28 2024

...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...East gales to 40 knots. Rain showers. Waves
3 to 6 feet occasionally to 8 feet building to 8 to 11 feet
occasionally to 14 feet.
.MONDAY...East gales to 35 knots diminishing to 15 to 25 knots.
Rain showers through early afternoon, then a chance of rain
showers by mid afternoon. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. A chance of rain showers. Waves subsiding to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Rain showers likely after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 20 to 30 knots veering west by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers. Waves building to 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots backing west. A chance of
rain showers. Waves 1 to 3 feet.

$$

LSZ266-291000-
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-
953 PM EDT Sun Apr 28 2024

...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...Northeast gales to 35 knots veering east after
midnight. A chance of rain showers by late evening, then rain
showers likely after midnight. Waves 4 to 7 feet occasionally to
9 feet building to 8 to 11 feet occasionally to 14 feet.
.MONDAY...East gales to 35 knots diminishing to 20 to 30 knots
late. Rain showers through early afternoon, then a chance of rain
showers by mid afternoon. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight, then veering west late. A chance
of rain showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
20 to 30 knots after midnight. Rain showers likely after
midnight. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.WEDNESDAY...South gales to 35 knots veering west by mid
afternoon. A chance of rain showers. Waves building to 4 to
8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.FRIDAY...East winds 15 to 25 knots veering west. A chance of
rain showers. Waves building to 2 to 4 feet.

$$

LSZ267-291000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
953 PM EDT Sun Apr 28 2024

.REST OF TONIGHT...East winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible late. A
chance of rain showers by late evening, then rain showers likely
after midnight. Waves 3 to 5 feet occasionally to 7 feet building
to 4 to 7 feet occasionally to 9 feet.
.MONDAY...East winds to 30 knots with a few gale force gusts to
35 knots possible becoming southeast 20 to 30 knots in the
afternoon. Rain showers through early afternoon, then a chance of
rain showers by mid afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight, then veering southwest late. A
chance of rain showers. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of rain showers after
midnight. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots by mid afternoon. A chance of rain showers. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots. A chance of rain showers,
then rain showers likely. Waves calm to 2 feet.
.FRIDAY...East winds 15 to 25 knots veering southwest. A chance
of rain showers. Waves building to 2 to 4 feet.

$$
LSZ261-291000-
MAFOR 2903/
Superior West...GALE WARNING IN EFFECT...11250 13256 12156 11146
11830. Waves 8 to 12 feet building to 10 to 14 feet overnight.
Waves 10 to 14 feet Monday. Waves 6 to 10 feet Monday evening.

Superior North Central...GALE WARNING IN EFFECT...12250 13256
12246 11340. Waves 5 to 9 feet building to 8 to 11 feet
overnight. Waves 9 to 13 feet subsiding to 8 to 11 feet Monday.
Waves 6 to 10 feet Monday evening.

Superior South Central...GALE WARNING IN EFFECT...14256 11246
12230 11320. Waves 5 to 9 feet building to 8 to 11 feet
overnight. Waves 7 to 11 feet subsiding to 5 to 8 feet Monday.
Waves 4 to 7 feet Monday evening.

Superior East...GALE WARNING IN EFFECT...12240 12256 11246 11256
11240 11340. Waves 5 to 9 feet overnight and Monday. Waves 4 to 7
feet Monday evening.

$$

GS

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

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