Great Lakes Forecast
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FZUS63 KMQT 251959
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 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 Friday morning, as
a 29.5 inch low pressure makes its way from the Central Plains to
Iowa.

LSZ162-260400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 PM EDT Sun Jun 25 2017 /259 PM CDT Sun Jun 25 2017/

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Numerous rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Patchy fog through
midnight. Numerous rain showers through midnight, 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.

$$

LSZ263-260400-
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-
359 PM EDT Sun Jun 25 2017

.LATE THIS AFTERNOON...North winds less than 10 knots. Patchy
fog. Scattered rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north late.
Patchy fog. 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.

$$

LSZ264-260400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 PM EDT Sun Jun 25 2017

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north late.
Patchy fog. 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.

$$

LSZ265-260400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 PM EDT Sun Jun 25 2017

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Isolated showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. Patchy fog through midnight. Scattered rain
showers through midnight, then 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.

$$

LSZ266-260400-
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-
359 PM EDT Sun Jun 25 2017

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight, then 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.

$$

LSZ267-260400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 PM EDT Sun Jun 25 2017

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.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.

$$

LSZ261-260400-
MAFOR 2521/
Superior West 11806 13716 12700 11610 11510. Patchy fog this
evening. Scattered showers late tonight through mid Monday
morning. Waves 2 feet or less.

Superior North Central 12800 12710 12810 11710 11610. Patchy fog
early this evening through late tonight. Scattered showers
overnight through mid Monday morning. Waves 1 to 2 feet.

Superior South Central 11800 11700 11710 12716 11826 11720 11710.
Patchy fog early this evening through late this evening. Scattered
showers tonight through late Monday morning. Waves 1 to 2 feet.

Superior East 11700 11800 11700 12800 11110 11810 11710. Patchy
fog this evening through late tonight. Scattered showers late
tonight 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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