Great Lakes Forecast
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FZUS63 KMQT 140155
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
955 PM EDT Sun Aug 13 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 30.1 inch high pressure across the eastern Great
Lakes will drift to New England through Monday. A weak 29.9 inch
trough will track southeastward across Lake Superior Monday
afternoon and evening. A 30.1 inch ridge will then drift
southeastward across northern Ontario Tuesday and Wednesday as a
29.6 inch low organizes over the central Plains. The low will
cross Upper Michigan on Thursday, then reach reach James Bay on
Friday as a 29.9 inch ridge builds back into the upper Great
Lakes.

LSZ162-141000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
955 PM EDT Sun Aug 13 2017 /855 PM CDT Sun Aug 13 2017/

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming east
less than 10 knots after midnight. A slight chance of showers.
Waves calm to 2 feet.
.MONDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. A chance of showers. Waves calm to
2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots backing north late.
Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots. A chance of showers
through early afternoon. Showers likely by mid afternoon. Waves
building to 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots. Showers likely
through midnight, then a chance of showers after midnight. Waves
subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.

$$

LSZ263-141000-
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-
955 PM EDT Sun Aug 13 2017

.REST OF TONIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots late. A slight chance of showers late. Waves calm
to 2 feet.
.MONDAY...East winds less than 10 knots backing northeast in the
afternoon, then increasing to 5 to 15 knots late. A slight chance
of showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers through early
afternoon, then showers likely by mid afternoon. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots. Showers likely
through midnight, then a chance of showers after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 5 to 15 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-141000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
955 PM EDT Sun Aug 13 2017

.REST OF TONIGHT...Southwest winds 10 to 20 knots becoming west 5
to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds less than 10 knots backing southwest late. A
slight chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds less than 10 knots veering east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. A chance of showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ265-141000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
955 PM EDT Sun Aug 13 2017

.REST OF TONIGHT...West winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds less than 10 knots veering north in the
afternoon, then increasing to 5 to 15 knots late. A slight chance
of showers by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A slight chance of
showers through midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots. Showers
likely. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering west. A chance
of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ266-141000-
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-
955 PM EDT Sun Aug 13 2017

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds less than 10 knots veering northwest in
the afternoon, then becoming north 5 to 15 knots late. A slight
chance of showers by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight. A slight chance of showers through midnight. Waves calm
to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A chance of showers. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. A chance of showers through midnight. Showers
likely after midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering northwest. A
chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.

$$

LSZ267-141000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
955 PM EDT Sun Aug 13 2017

.REST OF TONIGHT...South winds less than 10 knots increasing to 5
to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming north less than
10 knots in the afternoon, then increasing to 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A chance of showers by mid afternoon. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. A chance of showers through midnight, then
showers likely after midnight. Waves building to 2 to 4 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering west. A chance
of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-141000-
MAFOR 1403/
Superior West 11700 11800 11200 12100 12200 11100. Chance of
showers Monday afternoon. Waves 2 feet or less.

Superior North Central 11510 11610 12600 11700 12600 11500. Waves
2 feet or less.

Superior South Central 14500 11700 13800. Waves 1 foot or less.

Superior East 13400 11500 11600 11700 11800 11700. Waves 1 foot
or less.

$$

Kluber

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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