Great Lakes Forecast
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FZUS63 KMQT 161353
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
953 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 this afternoon and then
linger through Monday. As the high shifts southeast, a 29.8 inch
trough will cross Lake Superior Tuesday into Wednesday. The trough
will settle south of Lake Superior on Thursday as a 30.0 inch
ridge builds over the Upper Great Lakes.

LSZ162-162200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
953 AM EDT Sun Jul 16 2017 /853 AM CDT Sun Jul 16 2017/

.REST OF TODAY...Northeast winds 5 to 15 knots veering east in
the afternoon, then backing northeast late. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight, then backing northeast 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, then
showers likely. A chance of thunderstorms. 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.

$$

LSZ263-162200-
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-
953 AM EDT Sun Jul 16 2017

.REST OF TODAY...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Northeast 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, then
showers likely. A slight chance of thunderstorms. 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.

$$

LSZ264-162200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
953 AM EDT Sun Jul 16 2017

.REST OF TODAY...North winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then becoming west less than
10 knots late. Waves calm to 2 feet.
.TONIGHT...West winds less than 10 knots backing south after
midnight. 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.

$$

LSZ265-162200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
953 AM EDT Sun Jul 16 2017

.REST OF TODAY...North winds 5 to 15 knots backing northwest
late. Waves 1 to 3 feet 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.

$$

LSZ266-162200-
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-
953 AM EDT Sun Jul 16 2017

.REST OF TODAY...North winds 10 to 20 knots becoming northwest
5 to 15 knots late. Waves 2 to 4 feet subsiding to calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then becoming south less than 10 knots late. Waves 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.

$$

LSZ267-162200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
953 AM EDT Sun Jul 16 2017

.REST OF TODAY...North winds 10 to 20 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then 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.

$$
LSZ261-162200-
MAFOR 1615/
Superior West 11200 13100 12200 12300. Waves 1 foot or less.

Superior North Central 11800 11700 12600 11500 13400. Waves 2
feet or less.

Superior South Central 11810 11800 12700 11100 11300 11400 11300.
Waves 1 to 3 feet this afternoon. Waves 2 feet or less tonight
and Monday morning.

Superior East 11820 11810 12710 11810 11100 11200 11300. Waves 1
to 3 feet this afternoon and tonight. Waves 1 foot or less Monday
morning.

$$

Rolfson

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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