Great Lakes Forecast
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761
FZUS63 KMQT 260157
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
957 PM EDT Sun Jun 25 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 29.9 inch trough will linger over the Upper Great
Lakes through Monday. The trough will dissipate as a 30.3 inch
high pressure over the Northern Plains Monday morning moves over
the Ohio Valley Tuesday and off the East coast on Wednesday. A
29.4 inch low pressure over North Dakota Wednesday morning will
reach Northern Lower Michigan Thursday morning and New England
by Friday morning, as a 29.5 inch low pressure makes its way from
the Central Plains to Iowa.

LSZ162-261000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
957 PM EDT Sun Jun 25 2017 /857 PM CDT Sun Jun 25 2017/

.REST OF TONIGHT...Northwest winds 5 to 15 knots. Patchy fog by
late evening. Numerous rain showers by late evening, then
scattered rain showers after midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Isolated rain showers through early afternoon. Waves
calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots backing northeast
after midnight. Rain showers likely through midnight. A chance of
rain showers after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing north. A chance
of rain showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.

$$

LSZ263-261000-
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-
957 PM EDT Sun Jun 25 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Patchy fog by late evening. Numerous rain showers. Waves
calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest late.
Isolated rain showers through early afternoon. 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 becoming southwest 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east 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 backing northeast
after midnight. Rain showers likely through midnight. A chance of
rain showers after midnight. Waves building to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

$$

LSZ264-261000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
957 PM EDT Sun Jun 25 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Patchy fog by late evening. Scattered rain showers. Waves
calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Isolated rain showers through early afternoon. Waves
calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots. Rain showers likely
through midnight, then a chance of rain showers after midnight.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ265-261000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
957 PM EDT Sun Jun 25 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots late. Patchy fog. Scattered rain showers by late
evening. Numerous rain showers after midnight. Waves calm to
2 feet.
.MONDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon, then backing west late. Scattered rain
showers through early afternoon. 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. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. A chance of showers through early
afternoon, then showers likely by mid afternoon. Waves building
to 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots. Showers through
midnight. A chance of showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots backing north. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-261000-
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-
957 PM EDT Sun Jun 25 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Patchy fog. Scattered rain showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Patchy fog through early afternoon. Scattered rain
showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. Rain showers likely by mid afternoon. Waves building
to 2 to 4 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots backing east
after midnight. Rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ267-261000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
957 PM EDT Sun Jun 25 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Patchy fog. Scattered rain showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon, then backing northwest late. Patchy
fog through early afternoon. Scattered rain showers. Waves calm
to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers by mid afternoon. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming east
20 to 30 knots after midnight. Showers. Waves building to 2 to
4 feet.
.THURSDAY...Northeast winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots veering east. A chance
of rain showers. Waves calm to 2 feet.

$$
LSZ261-261000-
MAFOR 2603/
Superior West 12716 12700 11610 12510 11610. Patchy fog after
midnight. Scattered showers late overnight through mid Monday
morning. Waves 2 feet or less.

Superior North Central 12710 12810 11710 13610. Patchy fog late
this evening. Scattered showers overnight through mid Monday
morning. Waves 1 to 3 feet.

Superior South Central 11710 12716 11826 11720 11710 12610.
Patchy fog after midnight. Scattered showers late this evening
through late Monday morning. Waves 1 to 2 feet.

Superior East 11700 12800 11110 11810 12710 11720. Patchy fog
late tonight through late Monday morning. Scattered showers late
overnight through Monday morning. Waves 1 to 2 feet.

$$

JSS

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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