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FZUS63 KMQT 161452
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
952 AM EST Tue Jan 16 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...A 30.2 inch low over the eastern Great Lakes will
lift northeast while filling to 30.4 inches this afternoon.
Tonight through Wednesday night, Lake Superior will be between a
29.6 inch low pressure over far southern Hudson Bay and a 30.7
inch high pressure over the Middle Mississippi Valley. A 29.8 inch
trough will then drift from northern Ontario to the Upper Great
Lakes Thursday into Friday. A 29.3 inch low pressure will then
develop across southern Manitoba Friday afternoon and track
eastward to central Quebec by Saturday evening.

LSZ162-162300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
952 AM EST Tue Jan 16 2018 /852 AM CST Tue Jan 16 2018/

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE
WEDNESDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH WEDNESDAY MORNING...

.REST OF TODAY...North winds 5 to 15 knots backing northwest by
late morning, then becoming west 15 to 25 knots by mid afternoon.
Isolated snow showers late in the morning. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots becoming southwest gales to
35 knots. Heavy freezing spray after midnight. Waves building to
8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...Southwest gales to 35 knots. Heavy freezing spray in
the morning. Waves subsiding to 6 to 9 feet occasionally to 11
feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-162300-
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-
952 AM EST Tue Jan 16 2018

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE
WEDNESDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH WEDNESDAY MORNING...

.REST OF TODAY...North winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then becoming west 15 to 25 knots by
mid afternoon. Isolated snow showers. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots increasing to gales to
40 knots by midnight. Isolated snow showers in the evening. Heavy
freezing spray after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet.
.WEDNESDAY...West gales to 40 knots. Heavy freezing spray in the
morning. Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SATURDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-162300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
952 AM EST Tue Jan 16 2018

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE
WEDNESDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH WEDNESDAY MORNING...

.REST OF TODAY...North winds 10 to 20 knots backing west by mid
afternoon. Isolated snow showers. Waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots increasing to gales to
40 knots by midnight. Isolated snow showers in the evening.
Heavy freezing spray after midnight. Waves building to 10 to 14
feet occasionally to 18 feet.
.WEDNESDAY...West gales to 40 knots. Heavy freezing spray in the
morning. Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 15 to 25
knots after midnight. Waves subsiding to 3 to 5 feet occasionally
to 7 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of snow showers in the
morning. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. A chance of rain and snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SATURDAY...West winds 10 to 20 knots veering north. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-162300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
952 AM EST Tue Jan 16 2018

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
EVENING...

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

Note, wave height forecasts are for ice free areas.

$$

LSZ266-162300-
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-
952 AM EST Tue Jan 16 2018

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast winds 15 to 25 knots becoming north
10 to 20 knots by late morning, then backing northwest by mid
afternoon. Scattered snow showers. Waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...West winds 15 to 25 knots increasing to gales to
40 knots by midnight. Isolated snow showers. Freezing spray after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.WEDNESDAY...West gales to 40 knots. Freezing spray in the
morning. Waves subsiding to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots veering west. A chance of
rain and snow showers. Waves building to 3 to 6 feet occasionally
to 8 feet, then subsiding to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots veering north. Waves
subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-162300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
952 AM EST Tue Jan 16 2018

...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.REST OF TODAY...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots by late morning, then backing north by mid
afternoon. Scattered snow showers. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 20 to 30 knots
by midnight, then backing southwest late. Scattered snow showers.
Freezing spray after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY...Southwest gales to 35 knots veering west by late
morning. Freezing spray in the morning. A slight chance of snow
showers in the morning. Waves building to 7 to 11 feet
occasionally to 14 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A slight chance of
freezing rain and snow showers after midnight. Waves subsiding to
4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. A chance of freezing rain and snow
showers. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest. A chance
of freezing rain. A chance of snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SATURDAY...West winds 10 to 20 knots veering north. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-162300-
MAFOR 1616/
Superior West...Gale and Heavy Freezing Spray Warnings in
effect...11710 11630 12640 11642 13552. Heavy freezing spray
overnight and Wednesday morning. Waves 2 to 4 feet building to 8
to 11 feet tonight. Waves 8 to 12 feet Wednesday morning.

Superior North Central...Gale and Heavy Freezing Spray Warnings
in effect...11820 11720 11630 11640 11652 13662. Waves 2 to 4
feet building to 10 to 13 feet tonight. Waves 10 to 14 feet
Wednesday morning.

Superior South Central...Gale Warning in effect...11820 12730
12640 11641 12651. Scattered snow showers this afternoon.
Waves 2 to 5 feet building to 4 to 7 feet tonight. Waves 5 to 8
feet Wednesday morning.

Superior East...Gale Warning in effect...11120 11810 11720 11630
11640 11650 11550 11650. Scattered snow showers late this
afternoon. Freezing spray after midnight. Scattered snow showers
through the early overnight. Waves 1 to 4 feet building to 6 to 9
feet tonight. Waves 7 to 11 feet Wednesday morning.

$$

Petro

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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