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Marine Observations for Lake Superior
Local Radars
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DLH Reflectivity       MQT Reflectivity
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Nearshore Forecast


000
FZUS53 KDLH 020303
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1003 PM CDT Sat Oct 1 2022

For waters within five 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.

LSZ140-021015-
Grand Portage to Grand Marais MN-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY...

.REST OF TONIGHT...East wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots after midnight. Chance of sprinkles late
in the evening. Waves 2 to 4 feet.
.SUNDAY...East wind 10 to 15 knots easing to 5 knots late in the
afternoon. Partly sunny. Waves 1 to 3 feet.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming northwest after
midnight, then becoming southwest early in the morning. Slight
chance of rain showers after midnight. Waves 1 to 2 feet.
.MONDAY...Southwest wind 5 to 10 knots. Slight chance of rain
showers through the day. Waves 1 to 2 feet.

$$

LSZ141-021015-
Grand Marais to Taconite Harbor MN-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind around 15 knots with gusts to around
25 knots...decreasing overnight. Chance of sprinkles late in the
evening. Waves 3 to 5 feet.
.SUNDAY...East wind 10 to 15 knots. Mostly cloudy. Waves 2 to
4 feet subsiding to 1 to 3 feet in the afternoon.
.SUNDAY NIGHT...Northeast wind 5 to 10 knots becoming southwest
early in the morning. Slight chance of rain showers after
midnight. Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots. Slight chance of rain showers
in the morning. Waves 1 foot or less.

$$

LSZ142-143-021015-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind 15 to 20 knots. Gusts up to 25 knots
late in the evening. Chance of sprinkles through the night. Waves
4 to 6 feet. Waves occasionally to 8 feet.
.SUNDAY...East wind 5 to 10 knots. Chance of sprinkles in the
morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.SUNDAY NIGHT...Northeast wind 5 to 10 knots becoming southeast
early in the morning. Chance of sprinkles in the evening, then
chance of rain showers after midnight. Waves 1 to 2 feet.
.MONDAY...South wind 5 knots. Mostly cloudy. Waves 1 foot or
less.

$$

LSZ144-145-021015-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind around 20 knots. Gusts up to 30
knots decreasing to 20 knots toward daybreak. Chance of sprinkles
through the night. Waves 4 to 6 feet. Waves occasionally to 8
feet.
.SUNDAY...East wind 10 to 15 knots. Slight chance of rain showers
in the morning, then chance of sprinkles in the afternoon. Waves
2 to 4 feet subsiding to 1 to 3 feet in the late morning and
afternoon.
.SUNDAY NIGHT...East wind 10 to 15 knots becoming south 5 knots
early in the morning. Patchy fog in the evening. Chance of
sprinkles in the evening, then slight chance of rain showers
after midnight. Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or
less.

$$

LSZ146-021015-
Port Wing to Sand Island WI-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots toward daybreak. Chance of sprinkles
through the night. Waves 4 to 6 feet. Waves occasionally to
8 feet.
.SUNDAY...East wind 5 to 10 knots becoming northeast in the
afternoon. Chance of sprinkles through the day. Waves 1 to
3 feet.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming south early in
the morning. Chance of sprinkles in the evening, then chance of
rain showers after midnight. Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or
less.

$$

LSZ147-021015-
Sand Island to Bayfield WI-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots toward daybreak. Chance of sprinkles late
in the evening. Chance of sprinkles toward daybreak. Waves 4 to
6 feet subsiding to 2 to 4 feet toward daybreak. Waves
occasionally to 7 feet.
.SUNDAY...East wind 5 to 10 knots becoming northeast late in the
afternoon. Chance of sprinkles in the morning. Waves 1 to 3 feet.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming south after
midnight. Chance of sprinkles in the evening, then chance of rain
showers after midnight. Waves 1 foot or less.
.MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or
less.

$$

LSZ150-021015-
Outer Apostle Islands Beyond 5 NM from Mainland-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM CDT SUNDAY...

.REST OF TONIGHT...East wind around 20 knots. Gusts up to 30
knots decreasing to 20 knots toward daybreak. Chance of sprinkles
late in the evening. Chance of sprinkles toward daybreak. Waves 4
to 7 feet subsiding to 3 to 5 feet toward daybreak. Waves
occasionally to 9 feet.
.SUNDAY...Southeast wind 10 to 15 knots becoming east 5 to
10 knots in the afternoon. Chance of sprinkles in the morning.
Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning
and afternoon.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming south after
midnight. Chance of rain showers after midnight. Waves 1 to
2 feet.
.MONDAY...South wind 5 to 10 knots. Slight chance of rain showers
in the morning. Waves 1 foot or less.

$$

LSZ121-021015-
Chequamegon Bay-Bayfield to Oak Point WI-
1003 PM CDT Sat Oct 1 2022

.REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to
20 knots late in the evening. Chance of sprinkles late in the
evening. Chance of sprinkles toward daybreak. Waves 1 to 2 feet.
.SUNDAY...East wind 5 to 10 knots. Chance of sprinkles in the
morning. Waves 1 foot or less.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming south after
midnight. Chance of sprinkles in the evening, then chance of rain
showers after midnight. Patchy fog after midnight. Waves 1 foot
or less.
.MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or
less.

$$

LSZ148-021015-
Oak Point to Saxon Harbor WI-
1003 PM CDT Sat Oct 1 2022

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY...

.REST OF TONIGHT...East wind 15 to 20 knots with a few higher
gusts. Chance of sprinkles late in the evening. Chance of
sprinkles toward daybreak. Waves 4 to 6 feet subsiding to 2 to 4
feet toward daybreak. Waves occasionally to 8 feet.
.SUNDAY...Southeast wind 5 to 10 knots becoming northeast in the
afternoon. Chance of sprinkles in the morning. Waves 1 to 2 feet.
.SUNDAY NIGHT...East wind 5 to 10 knots becoming south after
midnight. Chance of sprinkles in the evening, then chance of rain
showers after midnight. Patchy fog after midnight. Waves 1 foot
or less.
.MONDAY...South wind 5 to 10 knots. Chance of rain showers in the
morning. Waves 1 foot or less.

$$

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

Melde

Duluth, MichiganLSZ140 Grand Portage to Grank Marais MN LSZ141 Grand Marais to Taconite Harbor MN LSZ142 Taconite Harbor to Silver Bay Harbor MN LSZ143 Silver Bay Harbor to Two Harbors MN LSZ144 Two Harbors to Duluth MN LSZ145 Duluth MN to Port Wing WI LSZ146 Port Wing to Sand Island WI LSZ147 Sand Island to Bayfield WI LSZ148 Oak Point to Saxon Harbor WI LSZ121 Chequamegon Bay - Bayfield to Oak Point WI LSZ140 Grand Portage to Grank Marais MN LSZ141 Grand Marais to Taconite Harbor MN LSZ142 Taconite Harbor to Silver Bay Harbor MN LSZ143 Silver Bay Harbor to Two Harbors MN LSZ144 Two Harbors to Duluth MN LSZ145 Duluth MN to Port Wing WI LSZ146 Port Wing to Sand Island WI LSZ147 Sand Island to Bayfield WI LSZ148 Oak Point to Saxon Harbor WI LSZ121 Chequamegon Bay - Bayfield to Oak Point WI

Open Waters Forecast


000
FZUS63 KMQT 020140
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
940 PM EDT Sat Oct 1 2022

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 30.5 inch high is over northern Ontario tonight.
The high will slowly weaken to 30.4 inches as it reaches the
Ontario/Quebec line Sunday afternoon. The high will further weaken
to 30.3 inches as it slips south to the Lower Great Lakes Monday.
As the high continues to weaken to 30.1 inches Tuesday, a 29.9
inch low will pass through northern Ontario Tuesday night. The low
will deepen to 29.8 inches as it reaches the Ontario/Quebec line
on Wednesday. Meanwhile, a 30.6 inch high builds south over
northern Saskatchewan Wednesday night, reaching southern Manitoba
Thursday.

LSZ162-020945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
940 PM EDT Sat Oct 1 2022 /840 PM CDT Sat Oct 1 2022/

.REST OF TONIGHT...Northeast winds 15 to 25 knots becoming east
10 to 20 knots after midnight. Waves 4 to 7 feet occasionally to
9 feet subsiding to 2 to 4 feet.
.SUNDAY...East winds 5 to 15 knots. A slight chance of showers.
Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering southwest late.
A slight chance of showers. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots. A slight chance of showers
through early afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming north gales to
35 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...North gales to 35 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet.

$$

LSZ263-020945-
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-
940 PM EDT Sat Oct 1 2022

.REST OF TONIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 5 to 15 knots backing east late. Waves
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering south after
midnight, then veering southwest late. A slight chance of showers
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming north gales to
40 knots. A chance of rain showers, then rain showers likely.
Waves building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...North gales to 40 knots diminishing to 20 to
30 knots. A chance of rain showers. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ264-020945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
940 PM EDT Sat Oct 1 2022

.REST OF TONIGHT...East winds 10 to 20 knots becoming southeast
5 to 15 knots late. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 5 to 15 knots. Waves subsiding to 1 to
3 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
late. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. A slight chance of showers through early afternoon.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming north gales to
40 knots. A chance of rain showers, then rain showers likely.
Waves building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...North gales to 40 knots diminishing to 20 to
30 knots. A chance of rain showers. Waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ265-020945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
940 PM EDT Sat Oct 1 2022

.REST OF TONIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots late. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering southwest
late. Waves calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming north gales to
35 knots. A chance of showers, then showers likely. Waves
building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...North gales to 40 knots. Rain showers likely, then a
chance of rain showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ266-020945-
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-
940 PM EDT Sat Oct 1 2022

.REST OF TONIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southeast late. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest gales
to 35 knots. A chance of showers, then showers likely. Waves
building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...North gales to 40 knots. Rain showers likely, then a
chance of rain showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ267-020945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
940 PM EDT Sat Oct 1 2022

.REST OF TONIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots late. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers, then showers likely. Waves
building to 2 to 4 feet.
.THURSDAY...North gales to 35 knots. Rain showers likely, then a
chance of rain showers. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.

$$
LSZ261-020945-
MAFOR 0203/
Superior West 11230 11220 11210 11310 11300 13200. Waves 3 to 7
feet overnight. Waves 1 to 4 feet Sunday and Sunday evening.

Superior North Central 12220 11320 14310 11310. Waves 2 to 5 feet.

Superior South Central 12220 11320 14310 11310. Waves 2 to 5 feet
overnight and Sunday. Waves 1 to 2 feet Sunday evening.

Superior East 11230 11220 11320 12310 12300 11310. Waves 3 to 5
feet overnight. Waves 1 to 4 feet Sunday and Sunday evening.

$$

GS

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

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