Great Lakes Forecast
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195
FZUS63 KMQT 131357
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
957 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 29.2 inch low will track into southern Iowa today.
This low will weaken to 29.7 inches as it slowly rotates across the
Great Lakes region through the upcoming weekend and into early next
week. By Monday night, the low will restrengthen to 29.5 inches over
the eastern Great Lakes. Tuesday, another low of 29.5 inches will
move out of the Rockies into the central Plains.

LSZ162-132200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
957 AM EDT Fri Apr 13 2018 /857 AM CDT Fri Apr 13 2018/

...GALE WARNING IN EFFECT FROM 8 PM EDT /7 PM CDT/ THIS EVENING
THROUGH LATE SUNDAY NIGHT...

.REST OF TODAY...Northeast winds 15 to 25 knots increasing to
20 to 30 knots late. A slight chance of snow showers by mid
afternoon. Waves 3 to 5 feet occasionally to 7 feet building to
5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northeast gales to 45 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.

$$

LSZ263-132200-
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-
957 AM EDT Fri Apr 13 2018

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH LATE
SUNDAY NIGHT...

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
20 to 30 knots. Waves 2 to 4 feet 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.

$$

LSZ264-132200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
957 AM EDT Fri Apr 13 2018

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then becoming north 20 to
30 knots late. Patchy fog by late morning. Waves 1 to 3 feet
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots with a few gale force
gusts to 35 knots. 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.

$$

LSZ265-132200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
957 AM EDT Fri Apr 13 2018

.REST OF TODAY...Northeast winds 10 to 20 knots becoming north
20 to 30 knots late. Patchy fog by late morning. Waves calm to
2 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northeast winds 20 to 30 knots with a few gale force
gusts to 35 knots. 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.

$$

LSZ266-132200-
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-
957 AM EDT Fri Apr 13 2018

.REST OF TODAY...East winds 5 to 15 knots becoming northeast
10 to 20 knots in the afternoon, then becoming north 20 to
30 knots late. Patchy fog by late morning. Waves calm to 2 feet
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots with a few gale force
gusts to 35 knots after midnight. 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.

$$

LSZ267-132200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
957 AM EDT Fri Apr 13 2018

.REST OF TODAY...East winds 10 to 20 knots backing north in the
afternoon, then increasing to 15 to 25 knots late. Patchy fog by
late morning. Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...Northeast winds 20 to 30 knots increasing to gales to
35 knots late. 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.

$$
LSZ261-132200-
MAFOR 1315/
Superior West...Gale Warning in effect...11130 12140 12150 13151.
Freezing spray late tonight through Saturday morning. Waves 3 to
7 feet this afternoon. Waves 5 to 7 feet building to 9 to 12 feet
tonight. Waves 10 to 15 feet Saturday morning.

Superior North Central 11120 11830 11840 12140 11151 12152.
Patchy fog late this morning. Freezing spray overnight. Heavy
freezing spray Saturday morning. Waves 2 to 4 feet this
afternoon. Waves 3 to 5 feet building to 7 to 11 feet tonight and
Saturday morning.

Superior South Central 11110 11130 11830 12140 13151. Patchy fog
late this morning. Freezing spray late tonight through mid
morning, then heavy freezing spray late Saturday morning. Waves 1
to 4 feet this afternoon. Waves 4 to 6 feet building to 8 to 11
feet tonight and Saturday morning.

Superior East 11110 11820 11830 11130 11140 12151 11152. Patchy
fog late this morning. Freezing spray overnight. Heavy freezing
spray Saturday morning. Waves 1 to 3 feet this afternoon. Waves 3
to 6 feet building to 6 to 10 feet tonight and Saturday morning.

$$

KCW

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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