725
FZUS63 KMQT 021953
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
353 PM EDT Thu May 2 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 pressure is tracking across the
Upper Mississippi Valley. The low drags 29.8 inch troughing across
Lake Superior tonight before wondering northeast over Ontario and
deepening to 29.6 inches on Friday. A weak 30.0 inch trough
pivots across the lake on Saturday ahead of ridging that builds to
30.1 inches by Saturday evening; this ridging persists through
Sunday. Ridging shifts east early next week as a broad 29.2 inch
low pressure develops on the Northern Plains on Monday. A strong
pressure gradient over western Lake Superior begins to setup
Tuesday morning as the 29.2 inch low center pushes eastward
against 30 inch ridging over far northern Ontario.

LSZ162-030400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
353 PM EDT Thu May 2 2024 /253 PM CDT Thu May 2 2024/

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Numerous
rain showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 15 to 25 knots becoming east 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. Patchy fog. Scattered rain showers. Waves subsiding to calm
to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. Patchy fog through early afternoon. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots. A slight chance
of rain showers after midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots backing east after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots becoming east 20 to
30 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers likely. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.

$$

LSZ263-030400-
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-
353 PM EDT Thu May 2 2024

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Numerous rain
showers. Waves 1 to 3 feet.
.TONIGHT...East winds 10 to 20 knots becoming south 5 to 15 knots
late. Patchy fog. Scattered rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Patchy fog through early afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing southeast
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
.TUESDAY...East winds 20 to 30 knots becoming northeast 15 to
25 knots. Rain showers likely. A chance of thunderstorms. A
chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-030400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
353 PM EDT Thu May 2 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy fog.
Numerous rain showers. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then veering southeast late. Patchy fog.
Scattered rain showers. Waves building to 2 to 4 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Patchy fog through
early afternoon. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest late.
Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
.TUESDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers likely. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ265-030400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
353 PM EDT Thu May 2 2024

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy fog.
Rain showers. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots late. Patchy fog. Numerous rain showers through
midnight. A slight chance of thunderstorms. Isolated rain showers
after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing south late.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight, then veering southwest late. Waves
calm to 2 feet.
.SATURDAY...South 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.
.SATURDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
.TUESDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-030400-
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-
353 PM EDT Thu May 2 2024

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy fog.
Rain showers. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
after midnight, then veering southeast late. Patchy fog. Numerous
rain showers through midnight. A slight chance of thunderstorms.
Isolated rain showers after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing southeast late.
A slight chance of rain showers through early afternoon. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then diminishing to 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
.TUESDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers likely. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-030400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
353 PM EDT Thu May 2 2024

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Scattered
showers. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 15 to
25 knots after midnight. Numerous rain showers through midnight,
then scattered rain showers and a slight chance of thunderstorms
after midnight. Patchy fog after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...South winds 10 to 20 knots veering west in the
afternoon, then becoming east 5 to 15 knots late. Patchy fog
through early afternoon. A chance of rain showers through early
afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A slight chance of rain showers by mid afternoon.
Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots becoming south 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of rain showers. Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots. Showers likely. Waves
building to 2 to 4 feet.

$$

LSZ261-030400-
MAFOR 0221/
Superior West 11126 11130 19136 11236 11310 19316 11510 11520
12530. Waves 2 to 4 feet tonight building to 3 to 5 feet Friday.

Superior North Central 12216 12220 19226 11420 13530. Waves 1 to
3 feet building to 2 to 4 feet tonight. Waves 3 to 5 feet Friday.

Superior South Central 11216 11226 11220 19226 11320 11410 11620
11610 11500. Waves 1 to 3 feet building to 2 to 4 feet tonight
then subsiding to 1 to 3 feet Friday.

Superior East 11106 11116 11230 19236 12340 19346 11420 11510
11500. Waves 1 to 2 feet building to 3 to 6 feet tonight then subsiding
to 1 to 3 feet Friday.

$$

BW

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

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