993
FZUS63 KMQT 251951
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 PM EDT Sat May 25 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 weak high pressure at 29.9 inches over the western
Great Lakes continues to build into the rest of the Great Lakes
region tonight before shifting east on Sunday as the next low
pressure at 29.5 inches lifts northeast into southern Wisconsin.
This low deepens to 29.3 inches as it tracks northeast across
northern Lower Michigan Monday morning and then into northern Quebec
by Tuesday morning. In its wake, a 30.2 inch high pressure builds
over the Northern Plains on Tuesday. This high pressure parks over
the Upper Great Lakes and builds to 30.3 inches by Wednesday, with
the high staying put through Thursday.

LSZ162-260400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 PM EDT Sat May 25 2024 /251 PM CDT Sat May 25 2024/

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of showers and a slight chance of thunderstorms. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. A slight chance of thunderstorms through
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of rain showers. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A slight chance of rain showers. Waves subsiding
to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A slight chance of rain
showers. A slight chance of thunderstorms by mid afternoon. Waves
calm to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east. Waves calm
to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-260400-
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-
351 PM EDT Sat May 25 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A slight
chance of showers and thunderstorms. Waves 2 to 4 feet subsiding
to 1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of thunderstorms through midnight. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast in the
afternoon. A slight chance of rain showers. Waves building to
1 to 3 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots backing north late.
A chance of rain showers. Waves 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots backing west by mid
afternoon. A slight chance of rain showers. Waves 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves 1 to
3 feet.
.TUESDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves 1 to 3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west. Waves calm
to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ264-260400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 PM EDT Sat May 25 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late. A
slight chance of thunderstorms through midnight. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east in the
afternoon. A slight chance of rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots backing north late. A
chance of rain showers. Waves building to 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TUESDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves 2 to 4 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ265-260400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 PM EDT Sat May 25 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. A chance of
showers and a slight chance of thunderstorms through midnight.
Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
late. Showers likely. Waves building to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots. A chance of
showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-260400-
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-
351 PM EDT Sat May 25 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A slight chance of thunderstorms through midnight. A
chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then backing east late. A slight
chance of rain showers by mid afternoon. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. Showers likely. Waves building to
2 to 4 feet.
.MONDAY...North winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ267-260400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 PM EDT Sat May 25 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A slight chance of showers. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots backing east late. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots backing northeast after
midnight, then increasing to 15 to 25 knots late. Showers likely.
A slight chance of thunderstorms after midnight. Waves building
to 2 to 4 feet.
.MONDAY...Northeast winds 15 to 25 knots backing north by mid
afternoon. Showers likely and a slight chance of thunderstorms.
Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-260400-
MAFOR 2521/
Superior West 11530 11410 12510 11500 11200 12110. A chance of
showers tonight and Sunday morning. Waves 2 to 4 feet subsiding
to 1 to 2 feet tonight. Waves 1 to 2 feet Sunday.

Superior North Central 11420 13410 11500 11400 11310 11210. A
chance of showers tonight. Waves 2 to 4 feet subsiding to 1 to 3
feet tonight. Waves 1 to 3 feet Sunday.

Superior South Central 12310 14400 11310 11210. A chance of
showers tonight. Waves 1 to 2 feet.

Superior East 13310 12410 11400 12310. Waves 1 to 2 feet.

$$

TAP

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

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