Great Lakes Forecast
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FZUS63 KMQT 172000
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 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 this evening.
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.

LSZ162-180400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Sat Jun 17 2017 /300 PM CDT Sat Jun 17 2017/

.LATE THIS AFTERNOON...South winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing north after
midnight. A slight chance of thunderstorms through midnight. A
chance of 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.

$$

LSZ263-180400-
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-
400 PM EDT Sat Jun 17 2017

.LATE THIS AFTERNOON...South winds less than 10 knots. A slight
chance of showers. Waves calm to 2 feet.
.TONIGHT...East winds less than 10 knots backing north after
midnight, then increasing to 5 to 15 knots late. A slight chance
of thunderstorms through midnight. A chance of 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.

$$

LSZ264-180400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Sat Jun 17 2017

.LATE THIS AFTERNOON...South winds less than 10 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds less than 10 knots backing northeast
late. A slight chance of rain showers through midnight, then rain
showers likely after midnight. 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.

$$

LSZ265-180400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Sat Jun 17 2017

.LATE THIS AFTERNOON...East winds 10 to 20 knots. A slight chance
of showers. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing northeast late.
A chance of showers and a slight chance of thunderstorms through
midnight, then showers likely after midnight. 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.

$$

LSZ266-180400-
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-
400 PM EDT Sat Jun 17 2017

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east late. A
chance of rain showers through midnight, then rain showers likely
after midnight. 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.

$$

LSZ267-180400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Sat Jun 17 2017

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east after
midnight. A slight chance of showers through midnight, then
showers likely after midnight. 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.

$$

LSZ261-180400-
MAFOR 1721/
Superior West 11400 11300 11100 13800 11700 11600. Chance of
showers. Waves 1 foot or less.

Superior North Central 13300 11200 11106 12806 11810. Chance of
showers overnight and late Sunday. Waves 1 foot or less.

Superior South Central 13300 11206 12106 11816 11716. Chance of
showers late this evening. Waves 2 feet or less.

Superior East 13300 11200 11206 11106 11806 11816. Chance of
showers tonight. Waves 1 foot or less.

$$

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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