Great Lakes Forecast
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FZUS63 KMQT 132000
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Thu Jul 13 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 29.9 inch low over lower Michigan will reach the
eastern Great Lakes tonight. High pressure of 30.2 inches will build
over the Upper Great Lakes late tonight and Friday. As the high
settles south on Saturday, a low pressure trough of 29.9 inches will
quickly track southeast through Lake Superior. By Sunday morning,
the trough will move southeast of Lake Superior as high pressure
of 30.1 inches builds back into the area and then lingers through
Monday. A 29.8 inch trough will cross Lake Superior Tuesday as
the high moves off the East Coast.

LSZ162-140400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Thu Jul 13 2017 /300 PM CDT Thu Jul 13 2017/

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. A chance of drizzle. Waves 2 to 4 feet subsiding to 1 to 3
feet.
.TONIGHT...North winds 5 to 15 knots becoming northwest 10 to
20 knots late. A slight chance of drizzle in the evening. Patchy
fog. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers after
midnight. A slight chance of thunderstorms late. Waves calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers. A slight chance of thunderstorms
by mid afternoon. Waves building to 1 to 3 feet, then subsiding
to calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots veering southwest. A
chance of showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots veering north. Waves calm to
2 feet.

$$

LSZ263-140400-
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-
400 PM EDT Thu Jul 13 2017

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3
feet.
.TONIGHT...North winds 5 to 15 knots backing northwest late. A
slight chance of drizzle through midnight. Patchy fog. Waves
subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing southwest late in
the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. A slight chance of
showers after midnight. Waves building to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. A slight chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves subsiding to calm
to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming north less than
10 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.

$$

LSZ264-140400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Thu Jul 13 2017

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Showers likely. Waves 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots. Patchy fog. A chance of
showers through midnight. A chance of drizzle after midnight.
Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing west in the
afternoon. Patchy fog in the morning. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. A slight chance of
showers after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. A chance of showers. A slight chance
of thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming west less than
10 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots. Waves calm to
2 feet.
.MONDAY...South winds 5 to 15 knots. A chance of showers. Waves
building to 1 to 3 feet.
.TUESDAY...West winds 5 to 15 knots veering north. A chance of
showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-140400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Thu Jul 13 2017

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Patchy fog.
Showers likely. Waves 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots. Patchy fog. Showers likely
in the evening, then a chance of showers. Waves 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Patchy fog in the morning. Waves
subsiding to calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers. A chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-140400-
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-
400 PM EDT Thu Jul 13 2017

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Showers likely. Waves 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight, then backing north late. Patchy fog. Showers likely
through midnight, then a chance of showers. Waves subsiding to
calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Patchy fog in the morning. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers. A chance of thunderstorms by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of showers. Waves building to 1 to 3 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-140400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Thu Jul 13 2017

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog. A
chance of showers. Waves 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. Patchy fog. Showers likely through midnight, then
a chance of showers. Waves 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Patchy fog in the morning. A slight chance of drizzle
in the morning. Waves 1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing southwest late. Waves
subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. A chance of showers through
midnight. Waves building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ261-140400-
MAFOR 1321/
Superior West 11120 11810 11800 13700 11600 11500. Patchy fog
through tonight. Chance of drizzle through this evening. Waves 1
to 4 feet.

Superior North Central 11116 11816 12810 12800 11700 11610.
Patchy fog through Friday morning. Chance of drizzle and showers
tonight. Waves 2 feet or less.

Superior South Central 13816 13810 12710. Patchy fog through
Friday morning. Chance of showers and drizzle overnight. Waves 1
to 3 feet.

Superior East 11810 12816 11110 12810 11800 11710. Patchy fog
through Friday morning. Chance of showers early this evening.
Chance of showers late tonight through mid morning Friday. Waves
1 to 2 feet.

$$

Kluber

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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