Great Lakes Forecast Issued by NWS
000
FZUS63 KMQT 140751
GLFLS
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 AM EDT Thu Mar 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...Lake Superior is currently between 30.3 inch ridging
over northern Ontario and a 29.7 inch low moving northeast into
the southern Great Lakes basin. Thoroughout the day, the ridging
will be largely stationary while the low weakens to 29.8 inches as
it approaches the Lower Great Lakes. The ridge will move overhead
Friday, but weaken Friday night to 30.0 inches while the low
approaches the Northeast U.S. at 29.8 inches. Friday night, a
29.4 inch Alberta Clipper low will approach Lake Superior, passing
north of the lake on Saturday, and continuing eastward into
Quebec Saturday night into Sunday. By Sunday evening, a 30.4 inch
high will be over the Northern Plains, reaching the Central Plains
by Monday and extending a 30.1 inch ridge over Lake Superior.
LSZ162-141600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 AM EDT Thu Mar 14 2024 /251 AM CDT Thu Mar 14 2024/
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Northeast winds 15 to 25 knots becoming east 10 to
20 knots late. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing northwest late.
Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots veering west after
midnight. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...West gales to 35 knots veering northwest by mid
afternoon. A chance of snow showers. Waves building to 5 to
8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves 2 to 4 feet.
.MONDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
$$
LSZ263-141600-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
351 AM EDT Thu Mar 14 2024
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Northeast winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Southwest gales to 35 knots veering west after
midnight. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 35 knots veering northwest by mid
afternoon. A chance of snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North gales to 40 knots diminishing to 20 to 30 knots.
A chance of snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
$$
LSZ264-141600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 AM EDT Thu Mar 14 2024
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Northeast winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast after
midnight. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.
.FRIDAY NIGHT...Southwest gales to 40 knots. A chance of rain
showers, possibly mixed with snow through midnight, then rain
showers, possibly mixed with snow after midnight. Waves building
to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...West gales to 35 knots veering northwest by mid
afternoon. A chance of rain showers. Waves 5 to 8 feet
occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots becoming north
gales to 45 knots after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY...North gales to 45 knots. Freezing spray. A chance of
snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. Freezing spray. Waves subsiding to 1 to 3 feet.
$$
LSZ265-141600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 AM EDT Thu Mar 14 2024
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TODAY...Northeast winds 10 to 20 knots backing north late. Waves
1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots. Waves 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. A chance of rain showers. Waves
building to 2 to 4 feet.
.SATURDAY...West gales to 40 knots. A chance of rain showers,
possibly mixed with snow. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of snow
showers through midnight, then snow showers likely after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...North gales to 40 knots diminishing to 20 to 30 knots.
Snow showers. Freezing spray. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to calm to 2 feet.
$$
LSZ266-141600-
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 AM EDT Thu Mar 14 2024
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Northeast winds 10 to 20 knots backing north late. Waves
1 to 3 feet.
.TONIGHT...North winds 15 to 25 knots becoming northeast 10 to
20 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots backing west in the
afternoon, then becoming southwest 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots becoming southwest
gales to 35 knots after midnight. A slight chance of rain and
snow showers through midnight, then rain showers, possibly mixed
with snow after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 40 knots. A chance of rain and snow
showers. Waves building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 45 knots. A chance of snow
showers through midnight, then snow showers likely after
midnight. Waves subsiding to 7 to 10 feet occasionally to
13 feet.
.SUNDAY...North gales to 40 knots. Snow showers. Freezing spray.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
$$
LSZ267-141600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 AM EDT Thu Mar 14 2024
.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TODAY...Northeast winds 10 to 20 knots backing north late. Waves
1 to 3 feet.
.TONIGHT...North winds 15 to 25 knots becoming northeast 10 to
20 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing northwest in the
afternoon, then backing west late. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots increasing to 15 to
25 knots after midnight. Rain showers likely after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots by mid afternoon. Rain showers likely through early
afternoon. A chance of snow showers. A chance of rain showers by
mid afternoon. Waves building to 8 to 11 feet occasionally to
14 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of snow
showers through midnight, then snow showers likely after
midnight. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...North gales to 35 knots. A chance of snow showers.
Freezing spray. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
$$
LSZ261-141600-
MAFOR 1409/
Superior West 14120 11220 11110 12800. Waves 2 to 5 feet today.
Waves 1 to 4 feet tonight.
Superior North Central 14120 12810 11120 11110. Waves 1 to 4 feet.
Superior South Central 14110 14810. Waves 1 to 3 feet.
Superior East 11110 12120 11110 12820 12120. Waves 2 to 4 feet.
$$
GS
Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable
Graphical marine forecasts are available online at:
weather.gov/greatlakes