Great Lakes Forecast
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FZUS63 KMQT 140158
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
958 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.

LSZ162-141000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
958 PM EDT Thu Jul 13 2017 /858 PM CDT Thu Jul 13 2017/

.REST OF TONIGHT...Northwest winds 5 to 15 knots increasing to 10
to 20 knots late. A slight chance of drizzle late in the evening.
Patchy fog. Waves calm to 2 feet.
.FRIDAY...West 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.

$$

LSZ263-141000-
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-
958 PM EDT Thu Jul 13 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots. A slight chance
of drizzle through midnight. Patchy fog. Waves 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.

$$

LSZ264-141000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
958 PM EDT Thu Jul 13 2017

.REST OF TONIGHT...North winds 5 to 15 knots. Patchy fog.
Scattered showers through midnight, then a chance of drizzle.
Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing west 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, 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.

$$

LSZ265-141000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
958 PM EDT Thu Jul 13 2017

.REST OF TONIGHT...North winds 10 to 20 knots. Patchy fog.
Scattered showers through midnight, then a chance of drizzle.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late in the
afternoon. Waves 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.

$$

LSZ266-141000-
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-
958 PM EDT Thu Jul 13 2017

.REST OF TONIGHT...North winds 10 to 20 knots. Patchy fog.
Numerous showers through midnight, then a chance of drizzle.
Scattered showers late. Waves 1 to 3 feet 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.

$$

LSZ267-141000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
958 PM EDT Thu Jul 13 2017

.REST OF TONIGHT...North winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Patchy fog. Numerous showers through
midnight, then scattered showers. Waves calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots backing west late in the
afternoon. Patchy fog in the morning. A slight chance of drizzle
in the morning. Waves calm to 2 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.

$$
LSZ261-141000-
MAFOR 1403/
Superior West 11800 13700 11600 11500 12510. Patchy fog
overnight through mid morning Friday. Waves 1 to 2 feet.

Superior North Central 11820 12810 11710 11700 12610 11510.
Patchy fog tonight. Chance of drizzle late this evening. Waves 2
feet or less.

Superior South Central 11826 12810 13710 12600. Patchy fog through
mid Friday morning. Scattered showers through midnight. Chance of
drizzle overnight through mid morning Friday. Waves 1 to 3 feet.

Superior East 11826 11820 12810 11700 12710 11610. Patchy fog
through Friday morning. Scattered 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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