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Marine Observations for Lake Superior
Local Radars
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Nearshore Forecast


000
FZUS53 KDLH 232219
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
519 PM CDT Mon May 23 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.

LSZ140-141-240415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
519 PM CDT Mon May 23 2022

.TONIGHT...South wind 5 to 10 knots becoming east late in the
evening, then becoming northeast after midnight becoming
southwest late in the night. Mostly clear. Waves 1 foot or less.
.TUESDAY...Southwest wind 10 to 15 knots. Gusts up to 20 knots in
the late morning and afternoon. Sunny. Waves 1 to 2 feet.
.TUESDAY NIGHT...Southwest wind 5 to 10 knots becoming northeast
early in the morning. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 2 feet.
.WEDNESDAY...East wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers in the morning, then rain
showers likely in the afternoon. Waves 1 to 2 feet.

$$

LSZ142-143-240415-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 knots becoming east late in the
evening, then becoming north after midnight becoming west late in
the night. Partly cloudy. Waves 1 foot or less.
.TUESDAY...South wind 5 to 10 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 knots becoming northeast in the
late evening and overnight. Mostly cloudy. Waves 1 foot or less.
.WEDNESDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
in the afternoon. Chance of rain showers in the morning, then
rain showers in the afternoon. Waves 1 to 3 feet.

$$

LSZ144-145-240415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 to 10 knots becoming southwest after
midnight. Partly cloudy until early morning then becoming mostly
cloudy. Waves 1 foot or less.
.TUESDAY...Southwest wind 5 knots becoming east late in the
afternoon. Mostly sunny. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots. Mostly cloudy. Waves 1 foot
or less.
.WEDNESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers likely in the morning, then rain showers
in the afternoon. Waves 1 to 2 feet building to 1 to 3 feet late
in the afternoon.

$$

LSZ146-147-240415-
Port Wing to Sand Island WI-Sand Island to Bayfield WI-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 to 10 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.
.TUESDAY...Southwest wind 5 to 10 knots becoming east late in the
afternoon. Mostly sunny. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around
25 knots. Chance of rain showers in the morning, then rain
showers in the afternoon. Waves 1 to 2 feet building to 1 to
3 feet late in the afternoon.

$$

LSZ150-240415-
Outer Apostle Islands Beyond 5 NM from Mainland-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 to 10 knots becoming south after
midnight. Partly cloudy. Waves 1 foot or less.
.TUESDAY...Southwest wind 5 to 10 knots becoming southeast late
in the afternoon. Mostly sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 to 10 knots. Mostly cloudy.
Waves 1 foot or less.
.WEDNESDAY...East wind 5 to 10 knots becoming northeast 15 to
20 knots with gusts to around 25 knots in the afternoon. Chance
of rain showers in the morning, then rain showers in the
afternoon. Waves 1 to 2 feet building to 2 to 4 feet late in the
afternoon.

$$

LSZ121-240415-
Chequamegon Bay-Bayfield to Oak Point WI-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 knots becoming south in the late
evening and overnight. Partly cloudy until early morning then
becoming mostly cloudy. Waves 1 foot or less.
.TUESDAY...South wind 5 knots becoming east late in the
afternoon. Mostly sunny. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots becoming south after midnight,
then becoming southeast early in the morning. Mostly cloudy.
Waves 1 foot or less.
.WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Rain showers likely in the morning, then rain showers
in the afternoon. Waves 1 to 2 feet.

$$

LSZ148-240415-
Oak Point to Saxon Harbor WI-
519 PM CDT Mon May 23 2022

.TONIGHT...Southeast wind 5 to 10 knots becoming south in the
late evening and overnight. Partly cloudy. Waves 1 foot or less.
.TUESDAY...Southwest wind 5 knots becoming east late in the
afternoon. Mostly sunny. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots becoming south after midnight,
then becoming southeast early in the morning. Mostly cloudy.
Waves 1 foot or less.
.WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Rain showers likely in the morning, then rain showers
in the afternoon. Waves 1 to 2 feet building to 1 to 3 feet late
in the afternoon.

$$

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

Wolfe

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 231940
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
340 PM EDT Mon May 23 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 30.4 inch high is currently over Lake Superior,
drifting east. By Tuesday morning, the high will be over Quebec
and Maine, still at 30.4 inches. A high of 30.3 inches will pass
through northern Ontario Tuesday night and Wednesday morning while
a 29.7 inch low will pass through Wisconsin and northeast to Lake
Superior overnight Wednesday into Thursday. The low will deepen
to 29.6 inches as it passes into Quebec Thursday night and Friday.
Saturday, the lake will be sandwiched between a 30.1 inch high
over Hudson Bay and a 29.8 inch low over Indiana.

&&

LSZ162-240345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
340 PM EDT Mon May 23 2022 /240 PM CDT Mon May 23 2022/

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east after
midnight, then veering southwest late. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south late.
Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers by mid afternoon. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. A chance of rain showers. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing northeast. Waves
calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet.

$$

LSZ263-240345-
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-
340 PM EDT Mon May 23 2022

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then becoming southwest 10 to 20 knots late. Waves calm
to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers by mid afternoon. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. A chance of rain showers. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming east 5 to 15 knots.
Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet.

$$

LSZ264-240345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
340 PM EDT Mon May 23 2022

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late.
Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south late.
Waves building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of rain showers
through early afternoon, then rain showers likely by mid
afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. A chance of rain showers. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering southeast. A chance
of rain showers. Waves building to 1 to 3 feet.

$$

LSZ265-240345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
340 PM EDT Mon May 23 2022

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering southwest late.
Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers by mid afternoon. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.THURSDAY...West winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet.

$$

LSZ266-240345-
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-
340 PM EDT Mon May 23 2022

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.TUESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of rain showers
through early afternoon, then rain showers likely by mid
afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots. Rain showers
through midnight, then a chance of rain showers after midnight.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves building to 1 to 3 feet.

$$

LSZ267-240345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
340 PM EDT Mon May 23 2022

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight, then becoming southeast 10 to 20 knots late.
Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A chance of rain showers. Waves building to 1 to
3 feet.
.WEDNESDAY NIGHT...East winds 20 to 30 knots becoming southeast
15 to 25 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves building to
2 to 4 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of rain showers. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering southeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ261-240345-
MAFOR 2321/
Superior West 11400 11310 11300 11400 13500 11400. Waves 1 foot
or less.

Superior North Central 14410 12510 12520. Waves 1 to 3 feet.

Superior South Central 12310 13410 12400 11310. Waves 2 feet or
less.

Superior East 12300 14410 11410 11300. Waves 2 feet or less.

$$

GS

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

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