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000
FZUS63 KMQT 112016
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
416 PM EDT Thu Apr 11 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 29.4 inch low pressure currently over the
Ohio River Valley deepens to 29.2 inches while tracking northeast
toward Lake Erie by late this evening. A considerable pressure
gradient is forecast across Lake Superior tonight and Friday as
the low pressure makes its closest approach. By Friday evening,
ridging at 30.0 inches builds across western Lake Superior then
shifts east across the entire lake Saturday. Ridging shifts east
Saturday night as a broad 29.7 inch low pressure moves across the
Upper Midwest. This low pressure brushes the Great Lakes Sunday,
centering over Lake Michigan early Sunday morning before being
absorbed by deeper low pressure east of James Bay. A 30.0 inch
ridge extending from northwest Ontario follows in its wake Sunday
afternoon into Monday, building to 30.2 inches Tuesday morning.
During Tuesday, deep low pressure of 29.2 inches will lift
northeast through the central Plains.

LSZ162-120430-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
416 PM EDT Thu Apr 11 2024 /316 PM CDT Thu Apr 11 2024/

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Isolated
rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers and a slight
chance of thunderstorms through midnight. Waves building to 2 to
4 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
rain showers through midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves 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 6 feet
occasionally to 8 feet.
.TUESDAY...Northeast gales to 35 knots. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.

$$

LSZ263-120430-
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-
416 PM EDT Thu Apr 11 2024

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Isolated
rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then increasing to 20 to 30 knots late.
A slight chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. A slight chance of rain showers by mid afternoon.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...East gales to 35 knots. Rain showers. Waves building
to 7 to 10 feet occasionally to 13 feet.

$$

LSZ264-120430-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
416 PM EDT Thu Apr 11 2024

...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
AFTERNOON...

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Isolated rain
showers. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 20 to
30 knots. A slight chance of rain showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY...North gales to 35 knots becoming northwest 20 to
30 knots late. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming southwest
5 to 15 knots by mid afternoon. A slight chance of rain showers
by mid afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming east 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet.
.TUESDAY...East gales to 35 knots. Rain showers likely. Waves
building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ265-120430-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
416 PM EDT Thu Apr 11 2024

...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
EVENING...

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Isolated rain
showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 20 to
30 knots late. A chance of rain showers. Waves building to 5 to
8 feet occasionally to 10 feet.
.FRIDAY...North gales to 40 knots becoming northwest gales to
35 knots in the afternoon. A slight chance of rain showers
through early afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots becoming northeast 5 to
15 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. 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. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.

$$

LSZ266-120430-
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-
416 PM EDT Thu Apr 11 2024

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE FRIDAY
NIGHT...

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Isolated rain
showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to gales to
35 knots late. A chance of rain showers. Waves building to 6 to 9
feet occasionally to 11 feet.
.FRIDAY...North gales to 40 knots becoming northwest gales to
45 knots in the afternoon. A chance of rain showers through early
afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.FRIDAY NIGHT...Northwest gales to 40 knots. Waves subsiding to
6 to 9 feet occasionally to 11 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to 20
knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
.TUESDAY...East gales to 35 knots. Rain showers likely. Waves
building to 6 to 10 feet occasionally to 13 feet.

$$

LSZ267-120430-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
416 PM EDT Thu Apr 11 2024

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Isolated rain
showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 20 to
30 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...North gales to 40 knots becoming northwest gales to
45 knots in the afternoon. A chance of rain showers through early
afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.FRIDAY NIGHT...Northwest gales to 40 knots. Waves subsiding to 7
to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west 10 to 20
knots by mid afternoon. A slight chance of rain showers by mid
afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots becoming east 10 to
20 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots.
A chance of rain showers. Waves building to 1 to 3 feet.
.TUESDAY...East winds 20 to 30 knots becoming southeast gales to
35 knots. Rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ261-120430-
MAFOR 1121/
Superior West 12710 12720 12730 12720. A chance of rain showers
this evening. Waves 1 to 4 feet.

Superior North Central...GALE WARNING IN EFFECT...12810 11820
11830 11840 12850 11750. Waves 1 to 3 feet building to 3 to 5 feet
tonight. Waves 5 to 9 feet Friday.

Superior South Central...GALE WARNING IN EFFECT...11810 11710
11720 11730 12850 12750. A chance of rain showers overnight and
Friday morning. Waves 1 to 3 feet building to 3 to 6 feet
tonight. Waves 7 to 11 feet Friday.

Superior East...GALE WARNING IN EFFECT...11200 11110 11820 11830
11840 11850 12760. A chance of rain showers tonight and Friday
morning. Waves 1 to 2 feet building to 3 to 5 feet tonight and to
8 to 12 feet Friday.

$$

WFO MQT

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

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