Great Lakes Forecast
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FZUS63 KMQT 110915
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
415 AM EST Sat Nov 11 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 30.6 inch ridge will shift across the Eastern Great
Lakes today as a weak 30.0 inch trough approaches the Upper Mississippi
Valley. This trough will weaken to around 30.2 inches as it
reaches Lake Superior late tonight into Sunday. A 30.4 inch high
will move across the Upper Great Lakes on Monday. High pressure
will reach the Lower Great Lakes by Tuesday, as a 29.5 inch low
pushes east out of the Canadian Rockies. This low will track in
the vicinity of Lake Winnipeg and towards the Hudson Bay Tuesday
night through Wednesday, pushing a 29.7 inch trough across the
Upper Great Lakes. The trough exits the Upper Great Lakes
Wednesday night with a 30.0 inch ridge dropping south across the
Upper Great Lakes by Thursday.

LSZ162-111715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EST Sat Nov 11 2017 /315 AM CST Sat Nov 11 2017/

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. A few gale
force gusts to 35 knots. A chance of snow showers. Waves 5 to 8
feet occasionally to 10 feet.
.TODAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of snow showers and a slight
chance of freezing drizzle in the morning. A slight chance of
drizzle. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots by midnight, then veering north late. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by late
morning, then increasing to 10 to 20 knots by mid afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. Rain showers likely. Waves
calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
calm to 2 feet.

$$

LSZ263-111715-
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-
415 AM EST Sat Nov 11 2017

...GALE WARNING IN EFFECT UNTIL 9 AM EST THIS MORNING...

.EARLY THIS MORNING...South gales to 40 knots. Snow showers
likely. Waves 6 to 9 feet occasionally to 11 feet.
.TODAY...Southwest gales to 35 knots early. Southwest winds diminishing
winds 20 to 30 knots through mid morning, then further
diminishing to 15 to 25 knots by mid afternoon. A chance of
drizzle and snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots by midnight, then veering north late. A slight chance of
snow showers in the evening. A chance of drizzle. Waves subsiding
to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. Rain showers likely. Waves
building to 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.

$$

LSZ264-111715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EST Sat Nov 11 2017

...GALE WARNING IN EFFECT UNTIL 11 AM EST THIS MORNING...

.EARLY THIS MORNING...South gales to 40 knots. Snow showers
likely. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Southwest gales to 35 knots diminishing to 15 to
25 knots. A chance of snow showers and a slight chance of
drizzle. A chance of rain showers in the afternoon. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots by midnight, then veering north late. A chance of snow
showers in the evening. A chance of drizzle. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds less than 10 knots increasing to 5 to
15 knots by late morning, then backing west by mid afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. A slight chance of rain showers. A slight chance of
snow showers after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming west less than
10 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...South winds 10 to 20 knots. Rain showers. Waves
building to 2 to 4 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. A chance of rain
showers. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ265-111715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EST Sat Nov 11 2017

.EARLY THIS MORNING...South winds 20 to 30 knots. A few gale
force gusts to 35 knots. Snow showers likely. Waves 4 to 7 feet
occasionally to 9 feet.
.TODAY...South winds 20 to 30 knots becoming southwest by late
morning, then diminishing to 15 to 25 knots by mid afternoon. A
few gale force gusts to 35 knots early. A chance of snow showers
and a slight chance of freezing drizzle in the morning. Waves
subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. A slight chance of drizzle and snow showers
in the evening. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. A slight chance of
snow showers, possibly mixed with rain. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain showers. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. A
chance of rain and snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ266-111715-
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-
415 AM EST Sat Nov 11 2017

...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...

.EARLY THIS MORNING...South gales to 35 knots. Snow showers.
Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...South gales to 35 knots veering southwest by late
morning, then diminishing to 20 to 30 knots by mid afternoon.
Snow showers in the morning. A chance of drizzle and snow showers
in the afternoon. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. A chance of snow showers in the evening.
Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of rain showers in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance
of rain and snow showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots. Rain showers likely. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ267-111715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EST Sat Nov 11 2017

...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...

.EARLY THIS MORNING...South gales to 40 knots. Snow showers
likely. Waves 5 to 8 feet occasionally to 10 feet.
.TODAY...South gales to 35 knots becoming southwest 20 to
30 knots by mid afternoon. Snow showers, possibly mixed with
rain. Drizzle likely in the afternoon. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. A chance of snow showers, possibly mixed
with rain in the evening. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots.
A slight chance of rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. A slight chance of rain and snow showers. Waves calm to
2 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots. Rain showers, then a chance of rain showers. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.

$$

LSZ261-111715-
MAFOR 1110/

Superior West...Gale Warning in effect...11550 12540 11530 11630
11620 11710 11800. Chance of snow showers through mid morning.
Waves 5 to 8 feet subsiding to 3 to 6 feet today. Waves subsiding
to 1 to 3 feet tonight.

Superior North Central...Gale Warning in effect...11457 11550
11540 11530 11520 11620 11710 11700. Snow showers this morning,
then a chance for snow and rain showers late this afternoon
through tonight. Waves 6 to 10 feet subsiding to 4 to 7 feet
today. Waves subsiding to 2 to 4 feet tonight.

Superior South Central...Gale Warning in effect...11457 11550
11540 11530 12520 11620 11610. Snow showers through this morning.
Waves 5 to 8 feet subsiding to 3 to 5 feet today. Waves subsiding
to 1 to 3 feet tonight.

Superior East...Gale Warning in effect...12457 11557 11546 11536
11530 11620 11610. Chance of snow showers today. Waves 6 to 10
feet today. Waves subsiding to 2 to 3 feet tonight.

$$

Ritzman

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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