Great Lakes Forecast
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FZUS63 KMQT 110243
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 PM EST Wed Jan 10 2018

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 trough of 29.4 inches extending from James Bay to
the central Plains will cross the Upper Great Lakes Thursday at
29.6 inches and reach the East Coast Friday evening. High
pressure averaging 30.7 inches over the Canadian Rockies Friday
will reach the Mid Mississippi Valley late Saturday night,
extending a 30.5 inch ridge across the Upper Great Lakes. The
high will extend from Quebec to the Ohio Valley Sunday. A 30.2
inch trough will pass across Wisconsin and Northern Illinois
Monday as a 31.0 inch high moves into the northern Plains.

LSZ162-111045-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 PM EST Wed Jan 10 2018 /843 PM CST Wed Jan 10 2018/

...GALE WARNING IN EFFECT FROM 7 AM EST /6 AM CST/ THURSDAY
THROUGH THURSDAY EVENING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY MORNING...

.REST OF TONIGHT...South winds 5 to 15 knots becoming north 15 to
25 knots late. Patchy fog. A chance of drizzle late in the
evening. Snow, possibly mixed with rain and freezing rain after
midnight. Waves calm to 2 feet building to 2 to 4 feet.
.THURSDAY...North gales to 35 knots. Patchy fog in the morning.
Heavy freezing spray. A slight chance of freezing rain in the
morning. Snow. Waves building to 8 to 11 feet occasionally to 14
feet, then subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Heavy freezing spray in the evening.
Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Isolated snow showers in the morning.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves building to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming northwest 10 to
20 knots. A chance of snow showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-111045-
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-
943 PM EST Wed Jan 10 2018

...GALE WARNING IN EFFECT FROM 7 AM EST THURSDAY THROUGH LATE
THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY MORNING...

.REST OF TONIGHT...South winds 5 to 15 knots becoming north 15 to
25 knots late. Patchy fog. A chance of drizzle late in the
evening. Freezing rain, possibly mixed with rain and snow after
midnight. Waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...North gales to 40 knots. Patchy fog in the morning.
Heavy freezing spray. A chance of freezing rain in the morning.
Snow. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY NIGHT...North gales to 40 knots diminishing to 20 to
30 knots by midnight. Heavy freezing spray. Numerous snow showers
in the evening. Scattered snow showers after midnight. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Scattered snow showers. Waves
subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Scattered snow showers. Waves building to 1 to
3 feet.
.SATURDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Scattered snow showers. Waves
subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. A chance of snow showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Snow showers likely.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-111045-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 PM EST Wed Jan 10 2018

...GALE WARNING IN EFFECT FROM 7 AM EST THURSDAY THROUGH LATE
THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY MORNING...
e of ligh
.REST OF TONIGHT...Southwest winds 5 to 15 knots becoming north
20 to 30 knots late. Patchy fog. A chance of drizzle late in the
evening. A chance of rain, possibly mixed with freezing rain and
snow after midnight. Waves 2 to 4 feet subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...North gales to 40 knots. Areas of fog in the morning.
Heavy freezing spray. A chance of freezing rain in the morning.
Snow. Waves building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...North gales to 40 knots diminishing to 20 to
30 knots late. Heavy freezing spray. Snow showers in the evening.
Scattered snow showers after midnight. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.FRIDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Heavy freezing spray in the morning.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Scattered snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Scattered snow showers. Waves subsiding to 1 to
3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots. A chance of snow
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots. A chance of snow showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers,
then snow showers likely. Heavy freezing spray. Waves building to
4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-111045-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 PM EST Wed Jan 10 2018

...GALE WARNING IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY AFTERNOON...

.REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. Patchy fog. A slight chance of drizzle late
in the evening. A chance of rain, possibly mixed with snow after
midnight. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots increasing to gales to
40 knots. Patchy fog. Freezing spray in the afternoon. Rain in
the morning. Snow, possibly mixed with freezing rain. Waves
building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...North gales to 40 knots diminishing to 20 to
30 knots late. Heavy freezing spray. Snow showers. Waves
subsiding to 8 to 11 feet occasionally to 14 feet.
.FRIDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Heavy freezing spray in the morning.
Numerous snow showers. Waves subsiding to 7 to 10 feet
occasionally to 13 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots. Numerous snow
showers. Waves 7 to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Numerous snow
showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Snow showers likely in the evening, then a chance
of snow showers after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY...Southwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 15 to
25 knots. Snow showers. Waves 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-111045-
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-
943 PM EST Wed Jan 10 2018

...GALE WARNING IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY AFTERNOON...

.REST OF TONIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots late. Patchy fog. A chance of drizzle. A chance of
rain, possibly mixed with snow after midnight. Waves 2 to 4 feet
subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 20 to 30 knots becoming north gales
to 40 knots. Patchy fog. Heavy freezing spray in the afternoon.
Snow, possibly mixed with rain and freezing rain likely. Waves
building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...North gales to 45 knots. Heavy freezing spray.
Snow showers. Waves building to 11 to 15 feet occasionally to
19 feet, then subsiding to 9 to 12 feet occasionally to 15 feet.
.FRIDAY...North winds 20 to 30 knots. Heavy freezing spray.
Numerous snow showers. Waves subsiding to 6 to 9 feet occasionally
to 11 feet.
.FRIDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Numerous snow showers. Waves 6 to 9 feet occasionally to 11 feet.
.SATURDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Heavy freezing spray in the morning. Numerous snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Snow showers. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing south. A chance
of snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.MONDAY...South winds 5 to 15 knots becoming north 15 to
25 knots. Snow showers. Heavy freezing spray. Waves building to
4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-111045-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 PM EST Wed Jan 10 2018

...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY AFTERNOON...
...GALE WARNING IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

.REST OF TONIGHT...South winds 10 to 20 knots. Areas of fog. A
slight chance of drizzle late in the evening. A chance of rain
after midnight. Waves 2 to 4 feet subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots becoming north 20 to
30 knots by mid afternoon. Patchy fog. Rain. Snow, possibly mixed
with freezing rain in the afternoon. Freezing spray in the
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...North gales to 40 knots. Heavy freezing spray.
Numerous snow showers. Waves building to 8 to 11 feet occasionally
to 14 feet, then subsiding to 6 to 9 feet occasionally to 11
feet.
.FRIDAY...North winds 20 to 30 knots. Heavy freezing spray.
Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Freezing spray.
Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Scattered snow showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Snow showers. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east. 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.

$$
LSZ261-111045-
MAFOR 1104/
Superior West...Gale Warning and Heavy Freezing Spray Warning in
effect...11400 11810 11847 14857 11852. Patchy fog. Chance of rain
and drizzle after midnight. Chance of rain late overnight, then
chance of freezing rain through mid morning Thursday. Freezing
spray early Thursday, then heavy freezing spray. Scattered snow
showers late Thursday evening. Waves 2 feet or less overnight.
Waves 5 to 8 feet building to 8 to 11 feet Thursday. Waves 7 to 10
feet subsiding to 5 to 8 feet Thursday evening.

Superior North Central...Gale Warning and Heavy Freezing Spray
Warning in effect...11510 11720 11846 13857 11867 11857. Patchy
fog. Chance of rain and drizzle after midnight, then chance of
snow through mid morning Thursday. Freezing spray midday Thursday,
then heavy freezing spray Thursday evening. Waves 1 to 4 feet
overnight. Waves 5 to 8 feet building to 10 to 14 feet Thursday and
Thursday evening.

Superior South Central...Gale Warning and Heavy Freezing Spray
Warning in effect...11420 11410 11506 11727 14857. Patchy fog.
Chance of rain overnight. Freezing spray Thursday afternoon, then
heavy freezing spray late. Chance of snow through mid morning
Thursday. Waves 1 to 3 feet overnight, building to 10 to 15 feet
Thursday and Thursday evening.

Superior East...Gale Warning and Heavy Freezing Spray Warning in
effect...11520 11513 11516 11416 11526 11847 12857. Patchy fog.
Chance of rain overnight. Freezing spray through Thursday
afternoon, then heavy freezing spray. Chance of snow and freezing
rain early Thursday afternoon. Chance of light freezing rain late
Thursday. Waves 1 to 4 feet overnight. Waves 1 to 2 feet building
to 6 to 9 feet Thursday. Waves 7 to 11 feet Thursday evening.

$$

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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