Great Lakes Forecast
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FZUS63 KMQT 111501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EST Mon Dec 11 2017

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 low of 29.8 inches will pass through the Great Lakes
Monday and into Tuesday. Late Tuesday, a high of 30.1 inches in
Ontario will build into the Great Lakes before a secondary low
pressure system of 29.7 inches swings south across the upper
Mississippi river valley on Wednesday. Weak low pressure systems
may lag across Lake Superior Thursday and Friday.

LSZ162-112315-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EST Mon Dec 11 2017 /901 AM CST Mon Dec 11 2017/

...GALE WARNING IN EFFECT FROM 4 PM EST /3 PM CST/ THIS AFTERNOON
THROUGH THIS EVENING...

.REST OF TODAY...Southwest winds 5 to 15 knots becoming north
15 to 25 knots by late morning, then increasing to gales to
35 knots by mid afternoon. Scattered snow showers. Waves calm to
2 feet building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...North gales to 35 knots diminishing to 20 to 30 knots
by midnight, then becoming northwest 15 to 25 knots late.
Freezing spray in the evening. Isolated snow showers after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Isolated snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering south after
midnight. Isolated snow showers. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots veering northwest in the
afternoon. Scattered snow showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. Scattered snow
showers. Waves calm to 2 feet.
.THURSDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Scattered snow showers. Waves building to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming southeast 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.

$$

LSZ263-112315-
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-
1001 AM EST Mon Dec 11 2017

...GALE WARNING IN EFFECT FROM 4 PM EST THIS AFTERNOON THROUGH
LATE TONIGHT...

.REST OF TODAY...Southwest winds 5 to 15 knots becoming northwest
15 to 25 knots by late morning, then becoming north gales to
35 knots by mid afternoon. Numerous snow showers. Freezing spray
in the afternoon. Waves 1 to 3 feet building to 5 to 8 feet
occasionally to 10 feet.
.TONIGHT...North gales to 35 knots diminishing to 20 to 30 knots
late. Freezing spray. Scattered snow showers. Waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 4 to
7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Isolated snow
showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast in the
afternoon. Scattered snow showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming north 10 to
20 knots after midnight. Numerous snow showers in the evening,
then scattered snow showers after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest.
Scattered snow showers. Waves building to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots backing south. Scattered
snow showers, then numerous snow showers. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.

$$

LSZ264-112315-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EST Mon Dec 11 2017

...GALE WARNING IN EFFECT FROM 4 PM EST THIS AFTERNOON THROUGH
LATE TONIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH TUESDAY AFTERNOON...

.REST OF TODAY...South winds 5 to 15 knots becoming southwest
15 to 25 knots by late morning, then becoming north gales to
40 knots by mid afternoon. Numerous snow showers. Heavy freezing
spray in the evening. Waves calm to 2 feet building to 6 to 9
feet occasionally to 11 feet.
.TONIGHT...North gales to 40 knots diminishing to 20 to 30 knots
late. Heavy freezing spray. Scattered snow showers. Waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray in the morning. Numerous snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Scattered snow showers. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. Scattered snow
showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight. Scattered snow showers. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest.
Numerous snow showers, then scattered snow showers. Waves
building to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots veering north. Scattered
snow showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

$$

LSZ265-112315-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EST Mon Dec 11 2017

...GALE WARNING IN EFFECT FROM 6 PM EST THIS EVENING THROUGH
TUESDAY MORNING...

.REST OF TODAY...South winds 10 to 20 knots veering southwest by
late morning, then becoming northwest gales to 35 knots by mid
afternoon. Numerous snow showers. Waves calm to 2 feet building
to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...North gales to 40 knots. Freezing spray. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet.
.TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots.
Freezing spray. Snow showers. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Scattered snow showers in the
evening, then numerous snow showers after midnight. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Scattered snow showers. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Scattered snow showers. Waves calm
to 2 feet.
.THURSDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots. Numerous snow showers. Waves building to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots backing west. Numerous
snow showers. Waves 1 to 3 feet.

$$

LSZ266-112315-
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-
1001 AM EST Mon Dec 11 2017

...GALE WARNING IN EFFECT FROM 6 PM EST THIS EVENING THROUGH
TUESDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH TUESDAY AFTERNOON...

.REST OF TODAY...South winds 15 to 25 knots becoming southwest
10 to 20 knots by late morning, then becoming west gales to
40 knots by mid afternoon. Numerous snow showers. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...North gales to 45 knots. Heavy freezing spray. Snow
showers. Waves building to 11 to 15 feet occasionally to 19 feet,
then subsiding to 10 to 14 feet occasionally to 18 feet.
.TUESDAY...North gales to 40 knots. Heavy freezing spray. Snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Freezing spray in the evening. Snow
showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering east in the
afternoon. Scattered snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. Scattered snow
showers. Waves calm to 2 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming northwest
15 to 25 knots. Numerous snow showers. Waves building to 2 to
4 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Numerous snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.

$$

LSZ267-112315-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EST Mon Dec 11 2017

...GALE WARNING IN EFFECT FROM 6 PM EST THIS EVENING THROUGH
TUESDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH TUESDAY AFTERNOON...

.REST OF TODAY...South winds 15 to 25 knots becoming southwest by
mid afternoon. Numerous snow showers. Waves calm to 2 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...North gales to 45 knots. Heavy freezing spray.
Numerous snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.TUESDAY...North gales to 40 knots diminishing to 20 to 30 knots
by mid afternoon. Heavy freezing spray. Numerous snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Numerous snow showers. Waves subsiding
to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. Scattered snow
showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. Scattered snow
showers. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing southwest.
Numerous snow showers. Waves building to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.

$$
LSZ261-112315-
MAFOR 1116/
Superior West...Gale Warning in effect...11730 11840 12850 12840
11730 11830. Freezing spray. Scattered snow showers. Waves 1 to 3
feet building to 3 to 6 feet this afternoon, then subsiding to 2
to 4 feet Tuesday morning.

Superior North Central...Gale Warning in effect...Heavy Freezing
Spray Warning in effect...11527 11750 11850 13852 12847. Freezing
spray becoming heavy through mid Tuesday morning. Scattered snow
showers. Waves 1 to 3 feet building to 8 to 12 feet this evening,
then subsiding to 5 to 8 feet Tuesday morning.

Superior South Central...Gale Warning in effect...Heavy Freezing
Spray Warning in effect...11527 11627 11757 14857 11857. Freezing
spray becoming heavy through mid Tuesday morning. Waves 1 to 3
feet this afternoon building to 10 to 14 feet tonight.

Superior East...Gale Warning in effect...Heavy Freezing Spray
Warning in effect...11537 11527 11757 14857 11857. Freezing spray
becoming heavy through mid Tuesday morning. Scattered snow
showers. Waves 2 to 4 feet building to 9 to 12 feet tonight, then
subsiding to 6 to 10 feet Tuesday morning.

$$

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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