Great Lakes Forecast
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FZUS63 KMQT 251356
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
956 AM 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 30.2 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 southeast Manitoba Wednesday morning
will reach James Bay Thursday, with a 29.8 inch trough extending
back to a 29.5 inch low pressure over the Central Plains.

LSZ162-252200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
956 AM EDT Sun Jun 25 2017 /856 AM CDT Sun Jun 25 2017/

.REST OF TODAY...West winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon. Patchy fog. Scattered rain
showers through late morning...then Numerous rain showers. Waves
calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Areas of fog. A chance
of rain showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing southwest late.
A slight chance of rain showers. Waves building to 1 to 3 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of showers after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots backing northeast. Rain
likely in the morning...then a chance of rain. Scattered
thunderstorms. Waves building to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots. Waves 1 to 3 feet.

$$

LSZ263-252200-
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-
956 AM EDT Sun Jun 25 2017

.REST OF TODAY...Northeast winds 5 to 15 knots backing north
late. Areas of fog. Scattered rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north late.
Areas of fog. A chance of rain showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest late. A
slight chance of rain showers through early afternoon. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing northeast. A chance
of rain. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves subsiding to
1 to 3 feet.

$$

LSZ264-252200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
956 AM EDT Sun Jun 25 2017

.REST OF TODAY...North winds 5 to 15 knots veering northeast in
the afternoon. Patchy fog. Isolated rain showers by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north late.
Patchy fog. A chance of rain showers. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots backing west late. A slight
chance of rain showers through early afternoon. Waves building to
1 to 3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves 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 10 to 20 knots backing east. Rain
likely. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ265-252200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
956 AM EDT Sun Jun 25 2017

.REST OF TODAY...Northwest winds 5 to 15 knots veering north in
the afternoon. Patchy fog. Isolated rain showers by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. Patchy fog. A chance of rain showers. Waves calm
to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest late. A
chance of 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 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves 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...Southeast winds 10 to 20 knots becoming east 15 to
25 knots. Rain likely. Waves building to 2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.

$$

LSZ266-252200-
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-
956 AM EDT Sun Jun 25 2017

.REST OF TODAY...North winds 5 to 15 knots. Patchy fog. Isolated
rain showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight, then veering north late. Patchy fog. A chance of rain
showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots backing northwest late. A
chance of rain showers through early afternoon. Waves building to
1 to 3 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east. Rain
likely. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...North winds 10 to 20 knots veering northeast. A
chance of rain showers. Waves subsiding to 1 to 3 feet.

$$

LSZ267-252200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
956 AM EDT Sun Jun 25 2017

.REST OF TODAY...West winds 5 to 15 knots veering northwest late.
Patchy fog. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north late.
Patchy fog. A chance of rain showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots backing northwest late.
A chance of rain showers. 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. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Rain. Waves building to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.

$$
LSZ261-252200-
MAFOR 2515/
Superior West 11800 11100 11806 11706 11700 13710. Patchy fog
through early overnight. Scattered showers this afternoon
through mid morning Monday. Waves 2 feet or less.

Superior North Central 12110 11800 11700 12710 12810. Patchy fog
late this morning. Scattered showers late tonight. Waves 1 to 2
feet.

Superior South Central 11713 12800 11700 13710 11810. Patchy fog
this afternoon through early overnight. Scattered showers
tonight and Monday morning. Waves 2 feet or less.

Superior East 14700 11700 11800 12110. Patchy fog this afternoon
through the early overnight. Scattered showers overnight through
Monday morning. Waves 1 to 2 feet.

$$

Petro

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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