Great Lakes Forecast
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000
FZUS63 KMQT 200306
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1006 PM EST Sun Nov 19 2017

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 28.9 inch low over Maine will move to the northeast
through late overnight as a 29.8 inch ridge slides across the
northern Great Lakes. A 29.2 inch low pressure over southern
Saskatchewan Monday morning will reach James Bay by Tuesday
afternoon. A 30.4 inch high will slide southeast through the
Northern Plains into the Central Plains Wednesday morning and
weaken to 30.2 inches over the Ohio Valley Thursday morning as a
29.8 inch trough moves into the western Great Lakes. The trough
will reach the eastern Great Lakes Friday morning as a 30.0 inch
ridge moves over the northern Great Lakes.

LSZ162-201115-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1006 PM EST Sun Nov 19 2017 /906 PM CST Sun Nov 19 2017/

...GALE WATCH IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY
AFTERNOON...

.REST OF TONIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots and backing southwest late. Waves 1 to 3 feet subsiding
to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots increasing to 10 to 20 knots
by late morning, then becoming southwest 15 to 25 knots by mid
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds increasing to 20 to 30 knots and
becoming west gales to 35 knots by midnight. A slight chance of
rain and snow showers after midnight. Waves building to 6 to 9
feet occasionally to 11 feet.
.TUESDAY...Northwest gales to 35 knots. A chance of snow showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves building to
2 to 4 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Rain showers likely. Snow showers likely. Waves
building to 4 to 7 feet occasionally to 9 feet.

$$

LSZ263-201115-
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-
1006 PM EST Sun Nov 19 2017

...GALE WATCH IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY
AFTERNOON...

.REST OF TONIGHT...West winds 10 to 20 knots becoming north 5 to
15 knots late. Isolated snow showers. Waves 3 to 5 feet
occasionally to 7 feet subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots increasing to 15 to 25 knots.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west gales
40 knots by midnight. A slight chance of rain and snow showers
after midnight. Waves building to 9 to 12 feet occasionally to 15
feet.
.TUESDAY...Northwest gales to 35 knots. A chance of snow showers.
Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming south 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots becoming west 20 to
30 knots. Rain showers likely, possibly mixed with snow. Waves
building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ264-201115-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1006 PM EST Sun Nov 19 2017

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...West winds 15 to 25 knots becoming northwest
and diminishing to 5 to 15 knots late. Isolated snow showers.
Waves 3 to 6 feet occasionally to 8 feet subsiding to 1 to 3 feet.
.MONDAY...South winds 5 to 15 knots increasing to 15 to 25 knots.
Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west by
midnight. A few gale force gusts to 35 knots late. A chance of
rain and snow showers. Waves building to 9 to 12 feet occasionally
to 15 feet.
.TUESDAY...Northwest gales to 40 knots. Snow showers. Waves
subsiding to 8 to 11 feet occasionally to 14 feet, then building
to 9 to 12 feet occasionally to 15 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of snow showers, possibly mixed with rain.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.

$$

LSZ265-201115-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1006 PM EST Sun Nov 19 2017

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...West winds 20 to 30 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves 3 to 5 feet occasionally
to 7 feet subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots increasing to 15 to 25 knots.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds veering west and increasing to 20
to 30 knots with a few gale force gusts to 35 knots. A slight
chance of rain showers, possibly mixed with snow after midnight.
Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 40 knots veering northwest in the
afternoon. Rain and snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers. Waves subsiding to 3 to 6
feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots backing west in the
afternoon. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of snow
showers. Waves building to 2 to 4 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots becoming west 20 to
30 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.

$$

LSZ266-201115-
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-
1006 PM EST Sun Nov 19 2017

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...West winds 20 to 30 knots becoming northwest
and diminishing to 5 to 15 knots late. Scattered snow showers.
Waves 4 to 7 feet occasionally to 9 feet subsiding to 2 to 4 feet.
.MONDAY...West winds 5 to 15 knots becoming south 15 to 25 knots
by late morning, then increasing to 20 to 30 knots by mid
afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...South winds 20 to 30 knots becoming west with a
few gale force gusts to 35 knots after midnight. A slight chance
of rain showers after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.TUESDAY...West gales to 40 knots becoming northwest in the
afternoon. Rain and snow showers. Waves building to 11 to 15 feet
occasionally to 19 feet.
.TUESDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. Snow showers likely. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots backing west in the
afternoon. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northwest winds 20 to 30 knots becoming north 15 to
25 knots. A chance of snow showers. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots becoming west. Rain and snow
showers likely. Waves subsiding to calm to 2 feet, then building
to 7 to 10 feet occasionally to 13 feet.

$$

LSZ267-201115-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1006 PM EST Sun Nov 19 2017

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...West winds 20 to 30 knots with a few gale force
gusts to 35 knots through midnight becoming northwest and
diminishing to 10 to 20 knots late. Snow showers. Waves 4 to 7
feet occasionally to 9 feet subsiding to 3 to 6 feet occasionally
to 7 feet.
.MONDAY...West winds 10 to 20 knots backing south by late
morning, then increasing to 20 to 30 knots by mid afternoon.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.MONDAY NIGHT...South winds 20 to 30 knots becoming southwest with
a few gale force gusts to 35 knots by midnight. A slight chance
of rain showers after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...West gales to 35 knots becoming northwest gales to
40 knots in the afternoon. Rain and snow showers. Waves building
to 11 to 15 feet occasionally to 19 feet, then subsiding to 10 to
14 feet occasionally to 18 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers likely. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 20 to 30 knots veering north. A chance of
rain and snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots becoming west. Rain showers,
possibly mixed with snow. Waves subsiding to calm to 2 feet, then
building to 7 to 10 feet occasionally to 13 feet.

$$
LSZ261-201115-
MAFOR 2004/
Superior West 11620 11600 11400 11410 11420 11520 11540 11540
19550. Waves 1 to 3 feet overnight building to 4 to 7 feet Monday.

Superior North Central 11720 11710 11600 11410 12420 11440 11540.
Waves 3 to 5 feet subsiding to 1 to 3 feet overnight. Waves then
building to 4 to 7 feet Monday evening.

Superior South Central 11630 11620 11600 11510 12420 11440 11540.
Scattered snow showers overnight. Waves 3 to 5 feet subsiding to
1 to 3 feet overnight. Waves then building to 3 to 6 feet Monday
evening.

Superior East 11730 11720 11710 11510 11420 11430 11440 11540
19550. Scattered snow showers overnight. Waves 4 to 7 feet
overnight building to 5 to 8 feet Monday evening.

$$

Borchardt

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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