Great Lakes Forecast
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FZUS63 KMQT 140810
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
410 AM EDT Sat Apr 14 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 into southern Iowa
early this morning and weaken to 29.7 inches as it slowly rotates
into the southern Great Lakes region through the rest of the
weekend. By Monday night, the low will restrengthen to 29.5 inches
over the eastern Great Lakes. A brief ridge of 30.0 inches will
then move over the region Wednesday morning after which another
low of 29.5 inches will move out of the Rockies into the central
Plains, passing through the Great Lakes on Wednesday.

LSZ162-141615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
410 AM EDT Sat Apr 14 2018 /310 AM CDT Sat Apr 14 2018/

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...

.EARLY THIS MORNING...Northeast gales to 45 knots. Freezing
spray. Waves 10 to 14 feet occasionally to 18 feet building to
11 to 15 feet occasionally to 19 feet.
.TODAY...Northeast gales to 45 knots. Freezing spray through
early afternoon. Waves building to 12 to 17 feet occasionally to
21 feet.
.TONIGHT...Northeast gales to 40 knots veering east after
midnight, then backing northeast late. A chance of snow. Freezing
spray after midnight. Waves subsiding to 11 to 15 feet
occasionally to 19 feet, then building to 12 to 17 feet
occasionally to 21 feet.
.SUNDAY...Northeast gales to 40 knots. Freezing spray through
early afternoon. Snow likely. Waves building to 15 to 20 feet
occasionally to 25 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots becoming north 20 to
30 knots after midnight. Snow likely through midnight, then a
chance of snow after midnight. Freezing spray after midnight.
Waves subsiding to 7 to 10 feet occasionally to 13 feet.
.MONDAY...North winds 10 to 20 knots. Freezing spray through
early afternoon. A chance of snow. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. A chance of snow.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...North winds 10 to 20 knots veering east. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of snow, possibly mixed with rain. Waves
building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-141615-
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-
410 AM EDT Sat Apr 14 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast gales to 40 knots. Heavy freezing
spray. Waves 10 to 14 feet occasionally to 18 feet building to 11
to 15 feet occasionally to 19 feet.
.TODAY...Northeast gales to 40 knots. Heavy freezing spray
through early afternoon. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet.
.TONIGHT...East gales to 40 knots. A chance of snow. Freezing
spray after midnight. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet.
.SUNDAY...Northeast gales to 40 knots. Freezing spray. Snow.
Waves building to 15 to 20 feet occasionally to 25 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots diminishing to 20 to
30 knots after midnight. Freezing spray. Snow likely. Waves
subsiding to 8 to 11 feet occasionally to 14 feet.
.MONDAY...North winds 15 to 25 knots. Freezing spray through
early afternoon. Snow likely through early afternoon, then a
chance of snow by mid afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...North winds 10 to 20 knots veering northeast. A chance
of snow. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of snow, possibly mixed with rain. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-141615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
410 AM EDT Sat Apr 14 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast gales to 40 knots. Heavy freezing
spray. Waves 8 to 11 feet occasionally to 14 feet building to 9
to 12 feet occasionally to 15 feet.
.TODAY...Northeast gales to 40 knots. Heavy freezing spray
through early afternoon. Waves subsiding to 8 to 11 feet
occasionally to 14 feet.
.TONIGHT...Northeast gales to 40 knots becoming east gales to
45 knots after midnight. Freezing spray after midnight. A chance
of snow after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...Northeast gales to 45 knots. Heavy freezing spray. Snow
likely through early afternoon. Snow by mid afternoon. Waves
building to 12 to 17 feet occasionally to 21 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots. Freezing spray.
Snow. Waves subsiding to 7 to 10 feet occasionally to 13 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray. Snow likely
through early afternoon. A chance of snow by mid afternoon. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...North winds 10 to 20 knots. A chance of snow. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots backing north. A
chance of snow, possibly mixed with rain. Waves building to 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-141615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
410 AM EDT Sat Apr 14 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast gales to 40 knots. Heavy freezing
spray. Waves 8 to 11 feet occasionally to 14 feet building to 9
to 12 feet occasionally to 15 feet.
.TODAY...Northeast gales to 40 knots. Heavy freezing spray
through early afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.TONIGHT...East gales to 45 knots. Freezing spray after midnight.
A chance of snow after midnight. Waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...East gales to 40 knots becoming northeast gales to
45 knots in the afternoon. Heavy freezing spray. Snow. Waves
building to 12 to 17 feet occasionally to 21 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Freezing spray through midnight. Snow
likely. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray through
early afternoon. Snow likely. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. A chance
of snow. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots. A chance of snow, possibly mixed with rain. Waves
building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-141615-
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-
410 AM EDT Sat Apr 14 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast gales to 40 knots. Heavy freezing
spray. Waves 9 to 12 feet occasionally to 15 feet.
.TODAY...Northeast gales to 40 knots. Heavy freezing spray
through early afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.TONIGHT...East gales to 45 knots. Freezing spray after midnight.
A slight chance of snow after midnight. Waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...East gales to 40 knots becoming northeast gales to
45 knots in the afternoon. Freezing spray. Snow. Waves building
to 12 to 17 feet occasionally to 21 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots diminishing to 20 to
30 knots after midnight. Freezing spray through midnight. Snow.
Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray through
early afternoon. Snow likely through early afternoon. A chance of
snow by mid afternoon. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Snow likely through
midnight, then a chance of snow after midnight. Freezing spray
after midnight. Waves 5 to 8 feet occasionally to 10 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of snow. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow, possibly mixed with rain. Waves
building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-141615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
410 AM EDT Sat Apr 14 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast gales to 35 knots. Heavy freezing
spray. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Northeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon, then increasing to gales to 35 knots
late. Heavy freezing spray through early afternoon. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building to
6 to 9 feet occasionally to 11 feet.
.TONIGHT...East gales to 40 knots. Freezing spray after midnight.
A chance of snow after midnight. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY...East gales to 40 knots backing northeast in the
afternoon. 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 gales to 40 knots diminishing to 20 to
30 knots after midnight. Snow. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...North winds 15 to 25 knots. Snow likely. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 20 to 30 knots backing northwest
after midnight. Snow likely through midnight, then a chance of
snow after midnight. Freezing spray after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow. A chance of rain. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow, possibly mixed with rain. Waves
building to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-141615-
MAFOR 1409/
Superior West...Gale and Heavy Freezing Spray Warnings in
effect...13162 13160 12250. Chance of snow late tonight. Waves 10
to 15 feet building to 12 to 16 feet today. Waves 12 to 16 feet
tonight.

Superior North Central...Gale and Heavy Freezing Spray Warnings in
effect...11152 12152 11140 12150 12250. Waves 7 to 11 feet today.
Waves 8 to 12 feet building to 10 to 13 feet tonight.

Superior South Central...Gale and Heavy Freezing Spray Warnings in
effect...12152 11252 12150 13250. Waves 8 to 12 feet building to
9 to 13 feet today. Waves 10 to 14 feet building to 11 to 15 feet
tonight.

Superior East...Gale and Heavy Freezing Spray Warnings in
effect...13152 13150 12260. Waves 6 to 10 feet today. Waves 7 to
11 feet building to 9 to 12 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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