Great Lakes Forecast
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FZUS63 KMQT 192049
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
349 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 tonight 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.

LSZ162-200500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
349 PM EST Sun Nov 19 2017 /249 PM CST Sun Nov 19 2017/

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

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Isolated snow
showers. Waves 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
by midnight, then becoming southwest less than 10 knots late.
Isolated snow showers in the evening. Waves 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 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots 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. A chance of snow showers. Rain showers likely. Snow
showers likely. Waves building to 4 to 7 feet occasionally to
9 feet.

$$

LSZ263-200500-
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-
349 PM EST Sun Nov 19 2017

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

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Isolated snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Scattered snow showers in the evening. Waves 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 gales to 35 knots becoming west gales
to 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.

$$

LSZ264-200500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
349 PM EST Sun Nov 19 2017

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

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Isolated snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Isolated snow showers in the evening. Waves 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 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots turning west with
a few gale force gusts to 35 knots after midnight. 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.

$$

LSZ265-200500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
349 PM EST Sun Nov 19 2017

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

.LATE THIS AFTERNOON...West winds 20 to 30 knots. Scattered snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots veering west 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.

$$

LSZ266-200500-
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-
349 PM EST Sun Nov 19 2017

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

.LATE THIS AFTERNOON...West winds 20 to 30 knots. Scattered snow
showers. Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 20 to 30 knots becoming northwest 15 to
25 knots by midnight, then diminishing to 10 to 20 knots late.
Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 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
6 feet occasionally to 8 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. A chance of
snow showers. Rain and snow showers likely. Waves subsiding to
calm to 2 feet, then building to 7 to 10 feet occasionally to 13
feet.


$$

LSZ267-200500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
349 PM EST Sun Nov 19 2017

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

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Numerous
snow showers. Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Show showers. Waves subsiding to 3 to 5 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 3 to 5 feet
occasionally to 7 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.

$$

LSZ261-200500-
MAFOR 1922/
Superior West 11630 12620 11700 11400 11420 12520. Waves 3 to 5
feet subsiding to 1 to 3 feet tonight.

Superior North Central 11630 12730 11710 11600 11510 11420 11430.
Waves 3 to 5 feet subsiding to 2 to 4 feet tonight.

Superior South Central 12640 11630 11620 11610 11510 11420 11430.
Scattered snow showers this evening. Waves 3 to 6 feet subsiding
to 2 to 4 feet tonight.

Superior East 11747 12730 12720 11610 11520 11430. Scattered snow
showers tonight. Waves 4 to 7 feet tonight subsiding to 2 to 4
feet Monday.

$$

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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