Great Lakes Forecast
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FZUS63 KMQT 180135
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
935 PM EDT Sat Jun 17 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 29.5 inch low over northern Ontario will extend a
trough of 29.6 inches over Lake Superior through tonight. Another
29.5 inch low developing on this trough over Wisconsin tonight
will cross eastern Upper Michigan Sunday morning. The low will
strengthen to 29.3 inches before reaching James Bay Monday
morning, where it will remain through Wednesday morning.
Meanwhile, a 30.0 inch ridge will drift from the northern Plains
to the Upper Great Lakes. The ridge will move to the Lower Great
Lakes on Thursday as a 29.6 inch low develops over the Upper
Mississippi Valley.

LSZ162-180945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
935 PM EDT Sat Jun 17 2017 /835 PM CDT Sat Jun 17 2017/

.REST OF TONIGHT...North winds 5 to 15 knots. Patchy fog.
Isolated thunderstorms by through midnight. Scattered showers.
Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west in the
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Patchy fog. A slight
chance of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ263-180945-
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-
935 PM EDT Sat Jun 17 2017

.REST OF TONIGHT...East winds less than 10 knots backing north
after midnight, then increasing to 5 to 15 knots late. Patchy
fog. Scattered rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west late. Showers
likely through early afternoon, then a chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Patchy fog. A chance of
showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Patchy fog through early
afternoon. A slight chance of rain showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. 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 southeast. A chance
of rain showers. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ264-180945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
935 PM EDT Sat Jun 17 2017

.REST OF TONIGHT...Southeast winds less than 10 knots backing
northeast late. Areas of fog. Isolated rain showers through
midnight, then numerous rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing northwest late. Rain
showers likely through early afternoon, then a chance of rain
showers by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Patchy fog. A
chance of rain showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. A slight chance of rain
showers through early afternoon. Patchy fog. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds less than 10 knots becoming southeast
5 to 15 knots. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. A chance of rain
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

$$

LSZ265-180945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
935 PM EDT Sat Jun 17 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots backing
northeast late. Areas of fog. Scattered showers and isolated
thunderstorms through midnight, then numerous showers. Waves calm
to 2 feet.
.SUNDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northwest late. Showers. Waves
calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Patchy fog. A chance
of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Patchy fog. A slight chance of showers. Waves
calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-180945-
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-
935 PM EDT Sat Jun 17 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots backing east
late. Widespread fog. Scattered rain showers through midnight,
then numerous rain showers. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon, then backing northwest late. A slight
chance of thunderstorms through early afternoon. Rain showers
likely. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Areas of fog. A chance of rain
showers. Waves building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Areas of fog. A slight chance of rain showers.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. 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 becoming southeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. A chance
of rain showers. Waves building to 1 to 3 feet.

$$

LSZ267-180945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
935 PM EDT Sat Jun 17 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots backing east
after midnight. Widespread fog. Isolated showers through midnight,
then numerous showers. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon, then backing northwest late. A slight
chance of thunderstorms through early afternoon. Showers. Waves
calm to 2 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Areas of fog. A chance of rain showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots. Areas of fog. A chance of
rain showers. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. A chance
of rain showers. Waves calm to 2 feet.

$$
LSZ261-180945-
MAFOR 1803/
Superior West 11100 13800 11700 13600. Patchy fog. Scattered
showers overnight through early evening Sunday evening. Waves 1
foot or less.

Superior North Central 11303 11203 11106 12806 11810 11710 11720.
Scattered showers overnight through Sunday evening. Patchy fog.
Waves 2 feet or less.

Superior South Central 11303 11206 12106 11816 11716 12720.
Scattered showers tonight through Sunday evening. Patchy fog.
Waves 2 feet or less.

Superior East 11303 11203 11206 11106 11806 11816 11720 11723.
Scattered showers late this evening. Patchy fog. Chance of
showers Sunday evening. Waves 2 feet or less overnight and Sunday.
Waves 2 to 3 feet Sunday evening.

$$

KEC

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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