Great Lakes Forecast
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FZUS63 KMQT 160841
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
341 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
continue to lift north and eastward while filling to 30.4 inches
this afternoon. Tonight through Wednesday night, Lake Superior
will be between 29.6 inch low pressure over far southern Hudson
Bay and 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.

LSZ162-161645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
341 AM EST Tue Jan 16 2018 /241 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...

.EARLY THIS MORNING...North winds 15 to 25 knots. Isolated snow
showers. Waves 4 to 7 feet occasionally to 9 feet.
.TODAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by late morning, then becoming west 15 to 25 knots by
mid afternoon. Isolated snow showers in the morning. Waves
subsiding to 1 to 3 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.

$$

LSZ263-161645-
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-
341 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...

.EARLY THIS MORNING...North winds 15 to 25 knots. Freezing spray.
Scattered snow showers. Waves 4 to 8 feet occasionally to
10 feet.
.TODAY...North winds 15 to 25 knots diminishing to 5 to 15 knots
by late morning, then becoming west 15 to 25 knots by mid
afternoon. Freezing spray in the morning. Isolated snow showers.
Waves subsiding to 1 to 3 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.

$$

LSZ264-161645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
341 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...

.EARLY THIS MORNING...North winds 15 to 25 knots. Freezing spray.
Scattered snow showers. Waves 4 to 7 feet occasionally to 9 feet.
.TODAY...North winds 15 to 25 knots diminishing to 10 to 20 knots
by late morning, then backing west by mid afternoon. Freezing
spray in the morning. Isolated snow showers. Waves subsiding to
1 to 3 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.

$$

LSZ265-161645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
341 AM EST Tue Jan 16 2018

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

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Freezing
spray. Scattered snow showers. Waves 3 to 6 feet occasionally to
8 feet.
.TODAY...North winds 15 to 25 knots diminishing to 10 to 20 knots
by late morning, then becoming northwest 15 to 25 knots by mid
afternoon. Freezing spray in the morning. Scattered snow showers.
Waves 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.

$$

LSZ266-161645-
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-
341 AM EST Tue Jan 16 2018

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

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Freezing
spray. Scattered snow showers. Waves 3 to 5 feet occasionally to
7 feet.
.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 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.

$$

LSZ267-161645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
341 AM EST Tue Jan 16 2018

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

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Isolated
snow showers. Waves 2 to 4 feet.
.TODAY...Northeast winds 15 to 25 knots diminishing to 5 to
15 knots by late morning, then backing north by mid afternoon.
Scattered snow showers. Waves subsiding to calm to 2 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.

$$

LSZ261-161645-
MAFOR 1610/
Superior West...Gale Warning and Heavy Freezing Spray Warning in
effect...11840 11830 11710 11630 12640 11642 11552. Heavy freezing
spray overnight. Waves 4 to 7 feet subsiding to 1 to 3 feet
today. Waves 2 to 4 feet building to 7 to 10 feet tonight.

Superior North Central...Gale Warning and Heavy Freezing Spray
Warning in effect...11130 11830 11820 11720 11630 11640 11650
11660. Freezing spray this morning. Scattered snow showers this
morning. Heavy freezing spray overnight. Waves 4 to 7 feet
subsiding to 2 to 4 feet today. Waves 2 to 3 feet building to 9 to
12 feet tonight.

Superior South Central...Gale Warning in effect...12130 11820
12730 12640 11652. Freezing spray this morning. Scattered snow
showers today. Freezing spray overnight. Waves 3 to 6 feet
subsiding to 2 to 4 feet today. Waves 2 to 4 feet building to 4 to
7 feet tonight.

Superior East...Gale Warning in effect...12130 11120 11810 11720
11630 11640 11650. Scattered snow showers. Freezing spray after
midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet today. Waves
1 to 2 feet building to 5 to 8 feet tonight.

$$

KEC

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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