Great Lakes Forecast
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FZUS63 KMQT 212058
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
358 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 builds into northern
Ontario this evening, low pressure of 29.5 inches will move
northeastward from the Oklahoma Panhandle. The low will track
across northern 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.

LSZ162-220500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
358 PM EST Sun Jan 21 2018 /258 PM CST Sun Jan 21 2018/

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

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. A slight chance of drizzle. Waves 1 to 3 feet building to
2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by midnight. Patchy fog in the evening. Freezing spray
after midnight. A slight chance of drizzle in the evening. A
slight chance of freezing drizzle. Waves building to 7 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.

$$

LSZ263-220500-
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-
358 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...

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Patchy
fog. A slight chance of drizzle or freezing drizzle. Waves 3 to 5
feet occasionally to 7 feet.
.TONIGHT...Northeast winds 20 to 30 knots. Patchy fog. Freezing
spray after midnight. A slight chance of drizzle in the evening.
A slight chance of freezing drizzle. A slight chance of snow
after midnight. Waves building to 7 to 10 feet occasionally to
13 feet.
.MONDAY...Northeast winds 20 to 30 knots increasing to gales to
40 knots. 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.

$$

LSZ264-220500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
358 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...

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Patchy
fog. A slight chance of freezing drizzle. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northeast winds 15 to 25 knots. Freezing spray and
patchy fog. A slight chance of freezing drizzle. A slight chance
of snow after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...Northeast winds 15 to 25 knots increasing to gales to
35 knots. 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.

$$

LSZ265-220500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
358 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...

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. A slight chance of drizzle. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then becoming east 20 to 30 knots late.
Patchy fog. A slight chance of drizzle in the evening. A chance
of freezing drizzle. Waves building to 5 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. 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.

$$

LSZ266-220500-
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-
358 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...

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. A chance of freezing drizzle or drizzle. Waves 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Northeast winds 15 to 25 knots becoming east 20 to
30 knots late. Patchy fog. Freezing spray after midnight. A
slight chance of drizzle in the evening. A slight chance of
freezing drizzle. Waves building to 5 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.

$$

LSZ267-220500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
358 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...

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then veering east late. Patchy fog. A
slight chance of freezing drizzle after midnight. Waves building
to 3 to 6 feet occasionally to 8 feet.
.MONDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. 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.

$$

LSZ261-220500-
MAFOR 2122/
Superior West...Gale Warning in effect...11130 11140 12141 12140
11150 11151. Patchy fog through tonight. Freezing spray overnight
and Monday. Chance of freezing drizzle and snow late Monday.
Waves 1 to 3 feet building to 5 to 9 feet tonight. Waves 7 to 11
feet Monday.

Superior North Central 11130 11140 14130 11130 11140. Freezing
spray. Patchy fog through tonight. Chance of freezing drizzle
Monday. Chance of snow late Monday. Waves 3 to 6 feet building to
5 to 8 feet tonight. Waves 5 to 8 feet Monday.

Superior South Central 11110 11120 11130 13230 11237 11147.
Patchy fog through tonight. Freezing spray Monday. Chance of
freezing drizzle overnight and Monday morning. Waves 1 to 3 feet
building to 5 to 8 feet tonight. Waves 5 to 9 feet Monday.

Superior East 12130 11131 14231 11247. Patchy fog through
tonight. Chance of freezing drizzle overnight and Monday morning.
Waves 1 to 3 feet building to 5 to 8 feet tonight. Waves 5 to 8
feet Monday.

$$

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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