Great Lakes Forecast
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FZUS63 KMQT 160749
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
349 AM EDT Sun Jul 16 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 30.2 inches over northern Ontario will
build into the Upper Great Lakes and then linger through Monday.
As the high shifts southeast, a 29.8 inch trough will cross Lake
Superior Tuesday into Wednesday. The trough settles south of Lake
Superior on Thursday as a 30.0 inch ridge builds over the Upper
Great Lakes.

LSZ162-161600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
349 AM EDT Sun Jul 16 2017 /249 AM CDT Sun Jul 16 2017/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast less than
10 knots late. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A slight chance of showers through midnight. A chance
of thunderstorms. Showers likely after midnight. Waves calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.

$$

LSZ263-161600-
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 AM EDT Sun Jul 16 2017

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast less than
10 knots after midnight, then becoming south 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast late. Waves
calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A slight chance of showers through midnight. A slight
chance of thunderstorms. Showers likely after midnight. Waves
calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing south. Waves calm
to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.

$$

LSZ264-161600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
349 AM EDT Sun Jul 16 2017

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...North winds 5 to 15 knots becoming west less than
10 knots late. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds less than 10 knots backing south after
midnight, then increasing to 5 to 15 knots late. Waves calm to
2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast late. Waves
calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. A chance of showers. A
slight chance of thunderstorms after midnight. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing south. Waves calm
to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.

$$

LSZ265-161600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
349 AM EDT Sun Jul 16 2017

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TODAY...North winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.TONIGHT...Northwest winds less than 10 knots becoming southeast
5 to 15 knots after midnight, then veering south late. Waves calm
to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
after midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...North winds 10 to 20 knots veering southeast. Waves
calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west. Waves
calm to 2 feet.

$$

LSZ266-161600-
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 AM EDT Sun Jul 16 2017

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

$$

LSZ267-161600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
349 AM EDT Sun Jul 16 2017

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...North winds 10 to 20 knots. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.TONIGHT...North winds 5 to 15 knots becoming east less than
10 knots late. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east late. 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 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots veering north. Waves calm
to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ261-161600-
MAFOR 1609/
Superior West 11110 11100 11200 11100 11800 11100 12200. Waves 2
feet or less.

Superior North Central 11810 12800 11700 12600 11500 11400. Waves
1 to 3 feet subsiding to 1 foot or less today. Waves 1 foot or
less tonight.

Superior South Central 11820 12810 11800 12700 11800 11300. Waves
2 to 4 feet subsiding to 1 to 2 feet today. Waves 2 feet or less
tonight.

Superior East 11820 13810 12710 11810 11100. Waves 2 to 4 feet
today. Waves 1 to 3 feet tonight.

$$

JLB

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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