Great Lakes Forecast
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FZUS63 KMQT 150751
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 AM EDT Sat Jul 15 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...High pressure of 30.1 inches, centered over southern
Wisconsin, will continue to push south towards the Ohio Valley by
this evening. An area of low pressure averaging 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 into
Wednesday as the high moves off the East Coast.

LSZ162-151600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 AM EDT Sat Jul 15 2017 /251 AM CDT Sat Jul 15 2017/

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. A slight
chance of showers. Waves calm to 2 feet.
.TODAY...Southwest winds 10 to 20 knots veering west late. A
slight chance of showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight, then diminishing to 5 to 15 knots late. Waves calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing northeast. A
chance of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering southwest.
Waves calm to 2 feet.

$$

LSZ263-151600-
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-
351 AM EDT Sat Jul 15 2017

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. A slight
chance of showers. Waves calm to 2 feet building to 1 to 3 feet.
.TODAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. A slight chance of showers. Waves
subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. 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 backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots veering northeast. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots becoming southwest
less than 10 knots. Waves calm to 2 feet.

$$

LSZ264-151600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 AM EDT Sat Jul 15 2017

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. A slight
chance of showers. Waves calm to 2 feet building to 1 to 3 feet.
.TODAY...Southwest winds 10 to 20 knots veering west in the
afternoon, then diminishing to 5 to 15 knots late. A slight
chance of showers. Waves subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves building to 1 to 3 feet.
.SUNDAY...North winds 5 to 15 knots becoming west less than
10 knots late. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds less than 10 knots backing southwest
after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots becoming northeast less than
10 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...South winds less than 10 knots. Waves calm to
2 feet.

$$

LSZ265-151600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 AM EDT Sat Jul 15 2017

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 10 to 20 knots veering northwest late. A
slight chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 15 to 25 knots. Waves building to 1 to
3 feet.
.SUNDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
late. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers after midnight. Waves calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing northeast. A
chance of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east. Waves
calm to 2 feet.

$$

LSZ266-151600-
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-
351 AM EDT Sat Jul 15 2017

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 10 to 20 knots veering northwest late. A
slight chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...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 late.
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 backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing northeast. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east. Waves
calm to 2 feet.

$$

LSZ267-151600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 AM EDT Sat Jul 15 2017

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 10 to 20 knots veering northwest late. A
chance of showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers through
midnight. Waves building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest late.
Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east by mid
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 5 to 15 knots backing northeast. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-151600-
MAFOR 1509/
Superior West 11500 12520 11510 11610 11820 11120 11110. Waves 1
to 3 feet.

Superior North Central 11500 11520 12620 11720 12820 11120. Waves
1 to 3 feet.

Superior South Central 11500 11520 11510 11610 11710 11820 12830.
Waves 1 to 3 feet.

Superior East 14510 11710 13820. Chance of showers late today.
Waves 1 to 3 feet.

$$

Beachler

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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