Great Lakes Forecast
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FZUS63 KMQT 130809
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
409 AM EDT Fri Apr 13 2018

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 29.3 inch low will track across the central Plains
today. This low will weaken slightly to 29.5 inches as it slowly
rotates across the Great Lakes region through the upcoming weekend
and into early next week.

LSZ162-131615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
409 AM EDT Fri Apr 13 2018 /309 AM CDT Fri Apr 13 2018/

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE SUNDAY
NIGHT...

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TODAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots late. A slight chance of snow showers by mid afternoon.
Waves building to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northeast gales to 40 knots. A slight chance of snow
showers through midnight. Freezing spray after midnight. Waves
building to 10 to 14 feet occasionally to 18 feet.
.SATURDAY...Northeast gales to 40 knots. Freezing spray. A slight
chance of snow by mid afternoon. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet.
.SATURDAY NIGHT...East gales to 40 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...Northeast gales to 35 knots. Freezing spray through
early afternoon. A chance of snow. Waves 10 to 14 feet
occasionally to 18 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 15 to
25 knots after midnight. A chance of snow. Waves subsiding to
6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...North winds 5 to 15 knots becoming east 10 to
20 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-131615-
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-
409 AM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE SUNDAY
NIGHT...

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TODAY...Northeast winds 10 to 20 knots increasing to 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northeast gales to 40 knots. Freezing spray after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SATURDAY...Northeast gales to 40 knots. Freezing spray. Waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet.
.SATURDAY NIGHT...East gales to 40 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY...Northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. Freezing spray. A chance of snow
through early afternoon. Snow by mid afternoon. Waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 9 to
12 feet occasionally to 15 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow likely through midnight, then a
chance of snow after midnight. Freezing spray after midnight.
Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 15 to 25 knots. Freezing spray. A chance of
snow. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...North winds 10 to 20 knots veering northeast. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-131615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
409 AM EDT Fri Apr 13 2018

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. Waves building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray after midnight. Waves
building to 8 to 11 feet occasionally to 14 feet.

.SATURDAY...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Heavy freezing spray. Waves 8 to 11
feet occasionally to 14 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. A chance of snow. Freezing spray after
midnight. Waves 8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northeast winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray. A chance of snow through
early afternoon. Snow by mid afternoon. Waves building to 9 to 12
feet occasionally to 15 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Freezing spray. Snow likely. Waves
subsiding to 7 to 10 feet occasionally to 13 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray. Patchy
blowing snow. A chance of snow. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots becoming northeast 10 to
20 knots. Patchy blowing snow. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-131615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
409 AM EDT Fri Apr 13 2018

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming north 20 to 30 knots
late. Waves building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northeast winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray after
midnight. Waves building to 9 to 12 feet occasionally to 15 feet.
.SATURDAY...Northeast winds 20 to 30 knots becoming east in the
afternoon. A few gale force gusts to 35 knots possible. Heavy
freezing spray. Waves 9 to 12 feet occasionally to 15 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. A slight chance of snow through
midnight, then snow likely after midnight. Freezing spray after
midnight. Waves subsiding to 8 to 11 feet occasionally to 14 feet,
then building to 9 to 12 feet occasionally to 15 feet.
.SUNDAY...East winds 20 to 30 knots becoming northeast by mid
afternoon. A few gale force gusts to 35 knots possible. Freezing
spray. Snow. Waves building to 10 to 14 feet occasionally to 18
feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Snow. Freezing spray after midnight.
Waves subsiding to 7 to 10 feet occasionally to 13 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray. Patchy
blowing snow. A chance of snow. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Patchy blowing snow. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-131615-
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-
409 AM EDT Fri Apr 13 2018

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming north 15 to 25 knots
late. Waves building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray after midnight. Waves
building to 9 to 12 feet occasionally to 15 feet.
.SATURDAY...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Heavy freezing spray. Waves subsiding
to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. A slight chance of snow through
midnight, then snow likely after midnight. Freezing spray after
midnight. Waves building to 9 to 12 feet occasionally to 15 feet.
.SUNDAY...East winds 20 to 30 knots backing northeast by mid
afternoon. A few gale force gusts to 35 knots possible. Freezing
spray. Snow. Waves building to 10 to 14 feet occasionally to 18
feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Freezing spray. Snow. Waves subsiding
to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray. Patchy blowing snow. A
chance of snow. Waves subsiding to 5 to 8 feet occasionally to 10
feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. Patchy blowing snow. A chance of snow showers, possibly
mixed with rain. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-131615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
409 AM EDT Fri Apr 13 2018

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots becoming north 10 to 20 knots
in the afternoon, then increasing to 15 to 25 knots late. Waves
building to 2 to 4 feet.
.TONIGHT...Northeast winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Freezing spray after midnight. Waves
building to 7 to 10 feet occasionally to 13 feet.
.SATURDAY...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Heavy freezing spray. Waves subsiding
to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. A slight chance of snow through
midnight, then snow likely after midnight. Freezing spray after
midnight. Waves building to 5 to 9 feet occasionally to 11 feet.
.SUNDAY...East winds 20 to 30 knots backing northeast by mid
afternoon. A few gale force gusts to 35 knots possible. Freezing
spray. Snow. Waves building to 7 to 11 feet occasionally to 14
feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots. A few gale force
gusts to 35 knots possible. Freezing spray. Snow. Waves subsiding
to 4 to 7 feet occasionally to 9 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray. Patchy
blowing snow. A chance of snow. Waves building to 4 to 8 feet
occasionally to 10 feet.
.TUESDAY...North winds 20 to 30 knots becoming northwest 10 to
20 knots. Patchy blowing snow. A chance of snow showers, possibly
mixed with rain. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-131615-
MAFOR 1309/
Superior West...Gale Warning in effect...11120 12130 12140 12150
11151. Freezing spray late tonight. Waves 2 to 4 feet building to
4 to 7 feet today. Waves 5 to 7 feet building to 9 to 12 feet
tonight.

Superior North Central 12110 11120 12830 12140 11141. Freezing
spray overnight. Waves 1 to 3 feet building to 2 to 4 feet today.
Waves 3 to 5 feet building to 7 to 10 feet tonight.

Superior South Central 12100 11110 11820 11830 12140 11141.
Freezing spray late tonight. Waves 2 feet or less building to 2
to 4 feet today. Waves 4 to 6 feet building to 6 to 10 feet
tonight.

Superior East 11110 11210 11110 11820 11830 11130 11140 11141.
Freezing spray overnight. Waves 1 to 3 feet today. Waves 3 to 6
feet building to 6 to 9 feet tonight.

$$

Titus

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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