Great Lakes Forecast
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FZUS63 KMQT 140138
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
938 PM 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 into southern Iowa
overnight and weaken to 29.7 inches as it slowly rotates into the
southern Great Lakes region through the upcoming 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.

LSZ162-140945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
938 PM EDT Fri Apr 13 2018 /838 PM CDT Fri Apr 13 2018/

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

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to
gales to 45 knots by midnight. Freezing spray after midnight.
Waves 6 to 9 feet occasionally to 11 feet building to 11 to 15
feet occasionally to 19 feet.
.SATURDAY...Northeast gales to 40 knots. A slight chance of snow
through early afternoon. Freezing spray. Waves building to 12 to
17 feet occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet.
.SATURDAY NIGHT...Northeast gales to 35 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY...Northeast gales to 40 knots. Freezing spray through
early afternoon. A chance of snow through early afternoon, then
snow likely by mid afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 15 to
25 knots after midnight. Snow likely through midnight, then a
chance of snow after midnight. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY...North winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Scattered snow showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots becoming north 5 to
15 knots. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-140945-
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-
938 PM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT THROUGH LATE SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM EDT SATURDAY
THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to gales
to 40 knots by midnight. Freezing spray after midnight. Waves 6
to 9 feet occasionally to 11 feet building to 10 to 14 feet
occasionally to 18 feet.
.SATURDAY...Northeast gales to 40 knots. Heavy 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 35 knots. A chance of snow.
Freezing spray. Waves subsiding to 9 to 12 feet occasionally to
15 feet.
.SUNDAY...Northeast gales to 40 knots. Freezing spray through
early afternoon. A chance of snow through early afternoon becoming
likely by mid afternoon. Waves subsiding to 8 to 11 feet
occasionally to 14 feet, then building to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow likely. Freezing spray after
midnight. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 15 to 25 knots. Freezing spray through
early afternoon. A chance of snow showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. Scattered snow
showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots veering northeast. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots becoming north 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-140945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
938 PM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM 2 AM EDT SATURDAY THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM EDT SATURDAY
THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to gales
to 40 knots after midnight. Freezing spray after midnight. Waves
4 to 7 feet occasionally to 9 feet building to 8 to 11 feet
occasionally to 14 feet.
.SATURDAY...Northeast gales to 40 knots. Heavy freezing spray.
Waves subsiding to 7 to 10 feet occasionally to 13 feet.
.SATURDAY NIGHT...East gales to 35 knots. Freezing spray. A
slight chance of snow after midnight. Waves 7 to 10 feet
occasionally to 13 feet.
.SUNDAY...Northeast gales to 40 knots. Freezing spray. Snow
likely by mid afternoon. Waves building to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY NIGHT...Northeast gales to 40 knots. Freezing spray. 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. A chance of snow showers. Waves subsiding to
4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Scattered snow
showers. Waves 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots. Waves building to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-140945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
938 PM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM 2 AM EDT SATURDAY THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM EDT SATURDAY
THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to gales
to 40 knots after midnight. Freezing spray after midnight. Waves
5 to 8 feet occasionally to 10 feet building to 9 to 12 feet
occasionally to 15 feet.
.SATURDAY...Northeast gales to 35 knots becoming east gales to
40 knots in the afternoon. Heavy freezing spray. Waves subsiding
to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...East gales to 35 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 7 to 10 feet
occasionally to 13 feet, then building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY...East gales to 40 knots backing northeast by mid
afternoon. Freezing spray. Snow. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow likely. Freezing spray after
midnight. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray through
early afternoon. Snow showers likely through early afternoon,
then a chance of snow showers by mid afternoon. Waves subsiding
to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Numerous snow
showers. Waves 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots. Scattered snow showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-140945-
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-
938 PM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM 2 AM EDT SATURDAY THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM EDT SATURDAY
THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to gales
to 40 knots after midnight. Freezing spray after midnight. Waves
5 to 8 feet occasionally to 10 feet building to 9 to 12 feet
occasionally to 15 feet.
.SATURDAY...Northeast gales to 40 knots. Heavy freezing spray.
Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...East gales to 35 knots. A chance of snow.
Freezing spray after midnight. Waves 8 to 11 feet occasionally to
14 feet.
.SUNDAY...East gales to 35 knots becoming northeast gales to
40 knots by mid afternoon. Freezing spray. Snow. Waves building
to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow. Freezing spray after midnight.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 20 to 30 knots. Freezing spray through
early afternoon. Snow showers likely by mid afternoon. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Numerous snow
showers. Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north.
Scattered snow showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-140945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
938 PM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM 2 AM EDT SATURDAY THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM EDT SATURDAY
THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots increasing to
gales to 35 knots late. Freezing spray after midnight. Waves 3 to
6 feet occasionally to 8 feet building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY...Northeast gales to 35 knots diminishing to 20 to
30 knots with a few gale force gusts to 35 knots in the
afternoon. Heavy freezing spray. Waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet occasionally
to 11 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots with a few gale force
gusts to 35 knots. Freezing spray. A chance of snow after
midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...East gales to 35 knots backing northeast by mid
afternoon. Freezing spray. Snow by mid afternoon. Waves building
to 8 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 15 to
25 knots after midnight. Freezing spray. Snow. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Freezing spray through early afternoon. Snow
showers likely. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Scattered snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest winds 20 to 30 knots becoming north 10 to
20 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots. Scattered snow showers. Waves building to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-140945-
MAFOR 1403/
Superior West...Gale Warning in effect...12150 11151 13161 11151
11150. Freezing spray overnight becoming heavy by Saturday
morning. Waves 7 to 10 feet building to 9 to 13 feet overnight,
then building to 11 to 16 feet Saturday.

Superior North Central...Gale Warning in effect...11141 12151
12152 11142 11141 11140. Freezing spray overnight becoming heavy
by Saturday morning. Waves 5 to 9 feet building to 7 to 10 feet
overnight.

Superior South Central...Gale Warning in effect...11140 13151
13251 11250. Freezing spray overnight becoming heavy by Saturday
morning. Waves 6 to 10 feet building to 8 to 12 feet overnight.

Superior East...Gale Warning in effect...11140 15151 11150.
Freezing spray overnight becoming heavy by Saturday morning. Waves
5 to 9 feet building to 7 to 10 feet overnight.

$$

Borchardt

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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