Great Lakes Forecast
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FZUS63 KMQT 111335
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
935 AM EDT Fri Aug 11 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 low pressure over eastern Upper Michigan
will reach eastern Ontario today while deepening to 29.8 inches. A
30.1 inch high pressure over the northern Plains Saturday morning
will move over the western Great Lakes Sunday, then remain nearly
stationary through Tuesday.

LSZ162-112145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
935 AM EDT Fri Aug 11 2017 /835 AM CDT Fri Aug 11 2017/

.REST OF TODAY...North winds 5 to 15 knots backing southwest in
the afternoon. Waves 2 to 4 feet subsiding to calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering northwest late.
Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing southwest in
the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ263-112145-
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-
935 AM EDT Fri Aug 11 2017

.REST OF TODAY...North winds 5 to 15 knots backing west late.
Waves 3 to 5 feet occasionally to 7 feet subsiding to calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late. Waves
calm to 2 feet.
.SATURDAY...Northwest winds less than 10 knots becoming west 5 to
15 knots in the afternoon, then backing southwest late. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. A slight chance of
showers through midnight. Waves calm to 2 feet.
.SUNDAY...West winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ264-112145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
935 AM EDT Fri Aug 11 2017

.REST OF TODAY...North winds 10 to 20 knots. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A slight chance of showers and thunderstorms
through midnight. Waves calm to 2 feet.
.SUNDAY...West winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ265-112145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
935 AM EDT Fri Aug 11 2017

.REST OF TODAY...North winds 15 to 25 knots. Areas of fog through
late morning. Isolated showers. Waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-112145-
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-
935 AM EDT Fri Aug 11 2017

.REST OF TODAY...North winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Patchy fog through late morning.
Isolated showers. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TONIGHT...North winds 10 to 20 knots backing northwest late.
Isolated showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west late.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. A slight chance of
showers through midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ267-112145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
935 AM EDT Fri Aug 11 2017

.REST OF TODAY...North winds 5 to 15 knots increasing to 10 to
20 knots late. Areas of fog through early afternoon. Scattered
showers. Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...North winds 15 to 25 knots. Scattered showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$
LSZ261-112145-
MAFOR 1115/
Superior West 11710 11600 12500 12600 12700. Waves 1 to 4 feet.

Superior North Central 12820 11710 11600 11710 13700. Waves 1 to
5 feet.

Superior South Central 13830 12720 13710. Waves 1 to 5 feet.

Superior East 13820 12830 13820. Patchy fog late this morning.
Scattered showers through tonight. Waves 1 to 4 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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