Great Lakes Forecast
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515
FZUS63 KMQT 151450
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
950 AM EST Mon Jan 15 2018

For waters beyond 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.

.SYNOPSIS...A 30.2 inch low over southern Wisconsin will shift to
southern Lake Michigan this afternoon, then dissipate while
drifting across the eastern Great Lakes through Tuesday. Tuesday
night through Wednesday night, Lake Superior will be between 29.6
inch low pressure over far northern Ontario and 30.8 inch high
pressure over the Middle Mississippi Valley. A 29.8 inch trough
will then drift from northern Ontario to the Upper Great Lakes
Thursday through Friday.

LSZ162-152300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
950 AM EST Mon Jan 15 2018 /850 AM CST Mon Jan 15 2018/

.REST OF TODAY...Northeast winds 15 to 25 knots increasing to
20 to 30 knots through the afternoon. Snow showers. Waves 2 to 4
feet building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots backing north by
midnight. A few gale force gusts to 35 knots in the evening.
Freezing spray. Scattered snow showers. Waves building to 6 to 9
feet occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by late morning, then becoming west 10 to 20 knots by
mid afternoon. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming southwest gales
to 35 knots in the afternoon. Heavy freezing spray and patchy
blowing snow. Waves building to 6 to 10 feet occasionally to
13 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-152300-
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-
950 AM EST Mon Jan 15 2018

.REST OF TODAY...East winds 10 to 20 knots increasing to 20 to
30 knots through the afternoon. Snow showers. Waves 1 to 3 feet
building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Northeast winds 20 to 30 knots backing north by
midnight. A few gale force gusts to 35 knots in the evening.
Freezing spray. Snow showers in the evening. Scattered snow
showers after midnight. Waves building to 6 to 9 feet occasionally
to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 5 to
15 knots by late morning, then becoming west 10 to 20 knots by
mid afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to gales to
35 knots after midnight. A slight chance of snow showers. Heavy
freezing spray after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...West gales to 35 knots. Freezing spray. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...Southwest winds 10 to 20 knots. A chance of snow
showers. Waves 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-152300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
950 AM EST Mon Jan 15 2018

.REST OF TODAY...Southeast winds 15 to 25 knots backing east.
Freezing spray late in the morning. Snow showers. Waves 4 to
7 feet occasionally to 9 feet.
.TONIGHT...Northeast winds 20 to 30 knots. Freezing spray. Snow
showers. Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming northwest 5 to 15 knots
by mid afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to gales to
35 knots after midnight. A slight chance of snow showers.
Freezing spray after midnight. Waves building to 8 to 11 feet
occasionally to 14 feet.
.WEDNESDAY...West gales to 35 knots. Freezing spray. Waves
building to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...Southwest winds 10 to 20 knots. A chance of snow
showers. Waves 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-152300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
950 AM EST Mon Jan 15 2018

.REST OF TODAY...Southeast winds 20 to 30 knots becoming east
15 to 25 knots by mid afternoon. Freezing spray. Snow showers.
Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...East winds 20 to 30 knots becoming northeast 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
Freezing spray. Snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Freezing spray in the morning. Snow showers likely in
the morning, then a chance of snow showers in the afternoon.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of snow showers. Waves building
to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...West winds 20 to 30 knots. Freezing spray in the
afternoon. Waves building to 8 to 11 feet occasionally to
14 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves 8 to 11 feet
occasionally to 14 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-152300-
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-
950 AM EST Mon Jan 15 2018

.REST OF TODAY...Southeast winds 20 to 30 knots backing east by
mid afternoon. Freezing spray late in the morning. Snow showers.
Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT...East winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then backing northeast late. Numerous snow
showers in the evening, then scattered snow showers after
midnight. Freezing spray after midnight. Waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to gales to
35 knots after midnight. A chance of snow showers. Freezing spray
after midnight. Waves building to 8 to 11 feet occasionally to
14 feet.
.WEDNESDAY...West gales to 35 knots. Freezing spray in the
morning. A chance of snow showers in the morning. Waves building
to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to
4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest. A chance
of snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-152300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
950 AM EST Mon Jan 15 2018

.REST OF TODAY...Southeast winds 20 to 30 knots backing east by
mid afternoon. Freezing spray late in the morning. Numerous snow
showers late in the morning, then scattered snow showers in the
afternoon. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...East winds 15 to 25 knots backing northeast late.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing north by mid afternoon. A
chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. A chance of snow showers. Freezing spray
after midnight. Waves building to 6 to 9 feet occasionally to
11 feet.
.WEDNESDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. Freezing spray in the morning. A chance of snow
showers in the morning. Waves building to 7 to 11 feet
occasionally to 14 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest. A chance
of snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-152300-
MAFOR 1516/
Superior West 11247 11147 12147 19157 11150 11140 11840 11830.
Freezing spray tonight. Scattered snow showers overnight through
mid morning Tuesday. Waves 3 to 6 feet this afternoon building to
5 to 9 feet tonight. Waves subsiding to 3 to 5 feet Tuesday
morning.

Superior North Central 11347 11237 11247 13147 11130 11820.
Freezing spray. Scattered snow showers late tonight and Tuesday
morning. Waves 5 to 8 feet.

Superior South Central 11337 11237 11247 12237 12137 11837.
Freezing spray late this morning. Freezing spray tonight and
Tuesday morning. Waves 3 to 7 feet.

Superior East 11347 11237 13230 13130. Freezing spray late this
morning. Scattered snow showers tonight and Tuesday morning.
Waves 3 to 6 feet.

$$

Kluber

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

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



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