Great Lakes Forecast Issued by NWS
000
FZUS63 KMQT 111409
GLFLS
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1009 AM 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 29.5 inch low pressure currently over the
Tennessee 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 lower Great Lakes
Sunday before brief 29.9 inch high pressure returns to the region
Monday.
LSZ162-112215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1009 AM EDT Thu Apr 11 2024 /909 AM CDT Thu Apr 11 2024/
.REST OF TODAY...North winds 5 to 15 knots backing west in the
afternoon, then veering northwest late. A chance of rain showers.
Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers through
midnight. Waves building to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Waves 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after 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. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.MONDAY...East winds 15 to 25 knots increasing to 20 to 30 knots.
A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
$$
LSZ263-112215-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1009 AM EDT Thu Apr 11 2024
.REST OF TODAY...North winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible. A chance of rain
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible becoming northwest 20 to 30 knots in the
afternoon, then diminishing to 15 to 25 knots late. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.
$$
LSZ264-112215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1009 AM EDT Thu Apr 11 2024
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
AFTERNOON...
.REST OF TODAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to gales to
35 knots. A chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...North gales to 35 knots backing northwest late. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming southwest
5 to 15 knots 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...Northeast winds 5 to 15 knots backing west. Waves calm
to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming east 20 to
30 knots. A chance of rain showers. Waves building to 2 to
4 feet.
$$
LSZ265-112215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1009 AM EDT Thu Apr 11 2024
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...
.REST OF TODAY...Southeast winds 5 to 15 knots backing northeast
in the afternoon. A chance of rain showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to gales to
35 knots. A chance of rain showers. Waves building to 7 to
10 feet occasionally to 13 feet.
.FRIDAY...North gales to 40 knots backing northwest in the
afternoon. A slight chance of rain showers through early
afternoon. Waves building to 9 to 12 feet occasionally to
15 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering northeast by
mid afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots backing east
after midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots becoming west 5 to 15 knots.
Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots becoming southeast 20 to
30 knots. A chance of rain showers. Waves building to 2 to
4 feet.
$$
LSZ266-112215-
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-
1009 AM EDT Thu Apr 11 2024
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE FRIDAY
NIGHT...
.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon, then backing northeast late. A slight chance of
rain showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to gales to
40 knots. A chance of rain showers through midnight, then rain
showers likely after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet.
.FRIDAY...North gales to 45 knots backing northwest in the
afternoon. A chance of rain showers, possibly mixed with snow
through early afternoon. Waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet.
.FRIDAY NIGHT...Northwest gales to 40 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots increasing to
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 becoming west 5 to 15 knots.
Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet.
$$
LSZ267-112215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1009 AM EDT Thu Apr 11 2024
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon. A chance of rain showers by mid afternoon. Waves
calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to gales to
45 knots. Rain showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.FRIDAY...North gales to 45 knots with a few storm force gusts to
50 knots possible backing northwest in the afternoon. A chance of
rain showers. A slight chance of snow showers by mid afternoon.
Waves building to 11 to 15 feet occasionally to 19 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet.
.FRIDAY NIGHT...Northwest gales to 45 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.SATURDAY...Northwest gales to 35 knots becoming west 15 to
25 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots backing northwest. Waves calm
to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming southeast 15 to
25 knots. A chance of rain showers. Waves building to 1 to
3 feet.
$$
LSZ261-112215-
MAFOR 1115/
Superior West 11810 12710 11820 11730 11830 11840 11730. A chance
of rain showers this afternoon and evening. Waves around 1 foot
this afternoon. Waves 1 to 4 feet tonight. Waves 3 to 5 feet
Friday morning.
Superior North Central...GALE WARNING IN EFFECT...13110 11810
11830 11840 12850. A chance of rain showers this afternoon and
tonight. Waves 2 feet or less this afternoon. Waves 1 to 2 feet
building to 4 to 6 feet tonight. Waves 6 to 10 feet Friday
morning.
Superior South Central...GALE WARNING IN EFFECT...11300 12100
11820 11736 11846 11856 11860. Waves 1 foot or less this
afternoon building to 4 to 7 feet tonight. Waves 8 to 11 feet
building to 10 to 13 feet Friday morning.
Superior East...GALE WARNING IN EFFECT...11310 12210 11826 11836
11846 11856 11860. Waves 1 to 2 feet this afternoon building to 3
to 6 feet tonight. Waves 7 to 10 feet building to 10 to 13 feet
Friday morning.
$$
Jablonski
Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable
Graphical marine forecasts are available online at:
weather.gov/greatlakes