Great Lakes Forecast
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000
FZUS63 KMQT 220300
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Sun Jan 21 2018



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...As 30.5 inch high pressure drifts across far northern
Ontario into Quebec through Tuesday morning, low pressure of 29.5
inches over Kansas will track northeastward, crossing Lower
Michigan Tuesday morning. As the low reaches the Canadian
Maritimes on Wednesday, high pressure of 30.4 inches will shift
across the Upper Great Lakes. Late Thursday, low pressure of 29.6
inches will organize near southern Alberta, then move across the
northern Plains on Friday.

LSZ162-221100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Sun Jan 21 2018 /900 PM CST Sun Jan 21 2018/

...GALE WARNING IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY
NIGHT...

.REST OF TONIGHT...Northeast winds 20 to 30 knots. Areas of fog.
Freezing spray after midnight. A slight chance of freezing
drizzle. Waves 3 to 6 feet occasionally to 8 feet building to
6 to 10 feet occasionally to 13 feet.
.MONDAY...Northeast gales to 40 knots. Freezing spray. A chance
of freezing drizzle and a slight chance of snow. Waves building
to 9 to 12 feet occasionally to 15 feet.
.MONDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then becoming north 15 to 25 knots late.
Freezing spray. Freezing rain in the evening. A chance of snow.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon. Isolated snow showers in the morning.
Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering south in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots. Waves building to 1 to
3 feet.
.FRIDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of rain showers. Scattered snow showers. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-221100-
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-
1000 PM EST Sun Jan 21 2018

...GALE WARNING IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY
NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM MONDAY EVENING
THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 20 to 30 knots. Patchy fog.
Freezing spray after midnight. A slight chance of freezing
drizzle. A slight chance of snow after midnight. Waves 4 to
7 feet occasionally to 9 feet building to 7 to 10 feet
occasionally to 13 feet.
.MONDAY...Northeast winds 20 to 30 knots increasing to gales to
40 knots by mid morning. Freezing spray. A chance of freezing
drizzle and snow. Waves building to 9 to 12 feet occasionally to
15 feet.
.MONDAY NIGHT...Northeast gales to 40 knots becoming north gales
to 35 knots late. Heavy freezing spray. Freezing rain in the
evening. A chance of snow. Waves subsiding to 8 to 11 feet
occasionally to 14 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Freezing spray. Scattered snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots becoming northeast
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots. Scattered snow
showers in the morning. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 10 to 20 knots veering south. A chance
of rain showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-221100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EST Sun Jan 21 2018

...GALE WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM MONDAY EVENING
THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...East winds 10 to 20 knots becoming northeast
15 to 25 knots by midnight. Freezing spray and areas of fog. A
slight chance of freezing drizzle and snow. Waves 4 to 8 feet
occasionally to 10 feet.
.MONDAY...Northeast winds 15 to 25 knots increasing to gales to
35 knots by late morning. Freezing spray. A chance of freezing
drizzle and snow. Waves subsiding to 4 to 7 feet occasionally to 9
feet, then building to 7 to 10 feet occasionally to 13 feet.
.MONDAY NIGHT...Northeast gales to 35 knots. Heavy freezing
spray. Freezing rain in the evening. A chance of snow. Waves
building to 8 to 12 feet occasionally to 15 feet.
.TUESDAY...North winds 20 to 30 knots. Heavy freezing spray.
Scattered snow showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering southeast in
the afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Scattered snow showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming southeast
15 to 25 knots. Scattered snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. Rain
showers likely. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-221100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Sun Jan 21 2018

...GALE WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM LATE MONDAY NIGHT
THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 10 to 20 knots increasing to
15 to 25 knots by midnight, then becoming east 20 to 30 knots
late. Areas of fog late in the evening. Widespread fog after
midnight. A chance of freezing drizzle. Waves 2 to 4 feet
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...East winds 20 to 30 knots becoming northeast gales to
35 knots by mid afternoon. Freezing spray. Snow. Freezing drizzle
likely in the afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet.
.MONDAY NIGHT...Northeast gales to 35 knots. Freezing spray. A
chance of freezing rain in the evening. Snow. Waves building to 7
to 11 feet occasionally to 14 feet.
.TUESDAY...North winds 20 to 30 knots. Heavy freezing spray.
Numerous snow showers in the morning. Scattered snow showers in
the afternoon. 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. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. A chance
of rain showers. 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.

$$

LSZ266-221100-
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-
1000 PM EST Sun Jan 21 2018

...GALE WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM LATE MONDAY NIGHT
THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots late. Areas of fog. Freezing spray after midnight. A
slight chance of freezing drizzle. Waves 4 to 8 feet occasionally
to 10 feet.
.MONDAY...East winds 20 to 30 knots becoming northeast gales to
35 knots by mid afternoon. Freezing spray. A chance of snow in
the morning. A chance of freezing drizzle. Snow in the afternoon.
Waves building to 7 to 10 feet occasionally to 13 feet.
.MONDAY NIGHT...Northeast gales to 40 knots. Freezing spray.
Snow. Freezing rain in the evening. A chance of freezing rain
after midnight. Waves building to 8 to 11 feet occasionally to 14
feet.
.TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots
in the afternoon. Heavy freezing spray. Numerous snow showers.
Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.TUESDAY NIGHT...North winds 20 to 30 knots becoming northeast
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Scattered snow showers. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 20 to 30 knots veering south. A chance
of rain showers. Waves building to 4 to 8 feet occasionally to
10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-221100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Sun Jan 21 2018

...GALE WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM LATE MONDAY NIGHT
THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots late. Areas of fog. A slight chance of freezing drizzle
after midnight. Waves 3 to 6 feet occasionally to 8 feet.
.MONDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Occasional gale force gusts to 35 knots late. A
chance of snow and freezing drizzle in the morning, then snow in
the afternoon. Freezing spray in the afternoon. Waves building to
4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...Northeast gales to 40 knots. Freezing spray.
Snow. Waves building to 6 to 10 feet occasionally to 13 feet.
.TUESDAY...Northeast gales to 35 knots becoming north 20 to
30 knots in the afternoon. Heavy freezing spray. Numerous snow
showers in the morning. Scattered snow showers in the afternoon.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming south 10 to
20 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots. Scattered snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Southeast winds 20 to 30 knots veering south. Rain
showers likely. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-221100-
MAFOR 2204/
Superior West...Gale Warning in effect...12141 12140 11150 13151.
Patchy fog tonight. Freezing spray. Chance of freezing drizzle
and snow late Monday afternoon and Monday evening. Waves 6 to 11
feet overnight and Monday. Waves 8 to 12 feet Monday evening.

Superior North Central...Gale and Heavy Freezing Spray Warnings
in effect...13133 12130 11140 11150 11157. Freezing spray. Chance
of freezing drizzle Monday. Chance of snow late Monday afternoon
through early evening Monday. Waves 5 to 9 feet overnight and
Monday building to 7 to 11 feet Monday evening.

Superior South Central...Gale Warning in effect...11133 12233
11230 11237 12147 11157. Freezing spray. Chance of freezing
drizzle through Monday morning. Waves 3 to 5 feet building to 5
to 8 feet overnight. Waves 5 to 9 feet Monday building to 7 to 11
feet Monday evening.

Superior East...Gale Warning in effect...11133 12233 11230 11231
11247 11147 11157. Patchy fog tonight. Freezing spray. Chance of
freezing drizzle through Monday morning. Chance of snow late
Monday morning. Waves 5 to 8 feet overnight and Monday building
to 7 to 11 feet Monday evening.

$$

Kluber

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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