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000
FZUS63 KMQT 150202
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 PM EDT Sun Apr 14 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 29.9 inch high pressure ridge extending southeast
into the Upper Mississippi Valley will build to 30.0 inches
tonight. This ridge will build further to 30.1 inches as it shifts
across the Upper Great Lakes during Monday and Monday night. On
Tuesday, the ridge at 30.3 inches will extend from Hudson Bay to
the Lower Great Lakes while deep low pressure of 29.2 inches lifts
northeast across the central Plains. This low will then weaken to
29.5 inches as it tracks to Wisconsin on Wednesday. The low will
continue to weaken as it moves across Lower Michigan Wednesday
night, and on Thursday, it will become a 29.9 inch trough
extending from southern Ontario to a 29.5 inch low pressure over
far northern Ontario. Also on Thursday, a 30.2 inch high pressure
ridge will build southeast into the Plains. On Friday, the ridge
will remain nearly stationary as it builds to 30.3 inches while
the low deepens to 29.4 inches as it moves over southern Hudson
Bay.

LSZ162-151015-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 PM EDT Sun Apr 14 2024 /902 PM CDT Sun Apr 14 2024/

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

$$

LSZ263-151015-
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-
1002 PM EDT Sun Apr 14 2024

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest late.
Waves calm to 2 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots backing east after
midnight. Waves calm to 2 feet.
.TUESDAY...East winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet.
.TUESDAY NIGHT...East gales to 40 knots. A chance of rain showers
through midnight, then rain showers after midnight. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY...East gales to 40 knots. Rain showers. Waves
subsiding to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves subsiding to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.

$$

LSZ264-151015-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 PM EDT Sun Apr 14 2024

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
late. Waves calm to 2 feet building to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west late. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots becoming northwest less
than 10 knots after midnight, then becoming northeast 5 to
15 knots late. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.TUESDAY NIGHT...East gales to 40 knots. Rain showers likely
after midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.WEDNESDAY...East gales to 40 knots. Rain showers. Waves
subsiding to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots becoming west 10 to
20 knots after midnight. Rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots veering northwest. Waves
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ265-151015-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 PM EDT Sun Apr 14 2024

.REST OF TONIGHT...Southeast winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Waves calm to 2 feet building to
1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then becoming variable late. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...Variable winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then becoming east 5 to 15 knots
late. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots increasing to gales to
35 knots after midnight. Rain showers likely after midnight.
Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...East gales to 40 knots. Rain showers. Waves building
to 9 to 12 feet occasionally to 15 feet, then subsiding to 6 to
9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots veering west after
midnight. Rain showers. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves subsiding to 1 to 3
feet.
.FRIDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ266-151015-
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-
1002 PM EDT Sun Apr 14 2024

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

$$

LSZ267-151015-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 PM EDT Sun Apr 14 2024

.REST OF TONIGHT...West winds 10 to 20 knots. Waves 1 to 3 feet
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west late. Waves
2 to 4 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then veering northeast late. Waves
subsiding to calm to 2 feet.
.TUESDAY...East 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. A chance of rain showers after midnight.
Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...East gales to 40 knots. Rain showers. Waves building
to 6 to 10 feet occasionally to 13 feet.
.WEDNESDAY NIGHT...East winds 20 to 30 knots becoming southeast
15 to 25 knots after midnight. Rain showers. Waves subsiding to
2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots veering northwest. A chance
of rain showers, possibly mixed with snow. Waves building to 3 to
5 feet occasionally to 7 feet.

$$
LSZ261-151015-
MAFOR 1503/
Superior West 14710 11600 11500 11400 11300. Waves 1 to 2 feet.

Superior North Central 11610 12720 12710 13600. Waves 1 to 3
feet.

Superior South Central 11500 11610 14710 11700 11600. Waves 1 to 3
feet.

Superior East 11610 11620 11720 12710 12720 11710. Waves 2 to 4
feet.

$$

Rolfson

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

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