Great Lakes Forecast
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FZUS63 KMQT 161402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EDT Fri Jun 16 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 29.4 inch low pressure over northwest Ontario will
move to James Bay tonight. On Saturday, the low will weaken to
29.5 inches, with a trough extending back to a 29.6 inch low over
the Central Plains. The Central Plains low will move over Upper
Michigan Sunday while strengthening to 29.4 inches. The low will
reach James Bay on Monday as a 29.8 inch ridge builds across the
Upper Mississippi River Valley.

LSZ162-162215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EDT Fri Jun 16 2017 /902 AM CDT Fri Jun 16 2017/

.REST OF TODAY...Southwest winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon, then diminishing to 5 to
15 knots late. Isolated showers by mid afternoon. Waves 1 to 3
feet subsiding to calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
calm to 2 feet.
.SATURDAY...West winds less than 10 knots veering north in the
afternoon, then becoming east 5 to 15 knots late. A chance of
showers. A chance of thunderstorms by mid afternoon. Waves calm
to 2 feet.
.SATURDAY NIGHT...North winds less than 10 knots increasing to
5 to 15 knots after midnight. Areas of fog. Showers likely and a
slight chance of thunderstorms. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Areas of fog. A chance
of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west 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. Waves calm to 2 feet.

$$

LSZ263-162215-
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-
1002 AM EDT Fri Jun 16 2017

.REST OF TODAY...Southwest winds 5 to 15 knots. Patchy fog by
late morning. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots veering west in
the afternoon, then veering north late. A chance of showers.
Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds less than 10 knots backing
north after midnight. Areas of fog. A chance of showers and a
slight chance of thunderstorms through midnight. Showers likely
after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Areas of fog. Showers likely through early afternoon.
A chance of showers by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Patchy fog. 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.

$$

LSZ264-162215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EDT Fri Jun 16 2017

.REST OF TODAY...South winds 5 to 15 knots veering southwest
late. Patchy fog by late morning. Waves calm to 2 feet building
to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots. A slight chance of rain
showers after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds less than 10 knots veering northeast in
the afternoon, then backing north late. A chance of rain showers.
Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds less than 10 knots. Areas of
fog. A chance of rain showers through midnight. Rain showers
likely after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Areas of fog. Rain showers likely
through early afternoon. A chance of rain showers by mid
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Patchy fog. A
chance of rain showers. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-162215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EDT Fri Jun 16 2017

.REST OF TODAY...South winds 5 to 15 knots. Isolated showers.
Isolated thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest after
midnight, then becoming south 5 to 15 knots late. A slight chance
of thunderstorms through midnight. A slight chance of showers.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing northeast in the
afternoon, then veering east late. A chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds less than 10 knots becoming north
5 to 15 knots after midnight. Showers likely and a slight chance
of thunderstorms. Areas of fog after midnight. Waves calm to
2 feet.
.SUNDAY...Northwest winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. Areas of fog. Showers likely through
early afternoon. A chance of showers by mid afternoon. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Patchy fog. A chance of showers. Waves subsiding to
calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-162215-
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-
1002 AM EDT Fri Jun 16 2017

.REST OF TODAY...South winds 5 to 15 knots. Patchy fog. Scattered
rain showers. Isolated thunderstorms by mid afternoon. Waves calm
to 2 feet.
.TONIGHT...South winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then becoming south 5 to 15 knots late.
A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast less
than 10 knots in the afternoon. A slight chance of rain showers
and a chance of thunderstorms. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds less than 10 knots becoming
northeast 5 to 15 knots after midnight. A chance of rain showers
through midnight. A slight chance of thunderstorms. Rain showers
likely after midnight. Areas of fog after midnight. Waves calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming northwest 15 to
25 knots by mid afternoon. Areas of fog. Rain showers likely
through early afternoon. A chance of rain showers by mid
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Patchy fog. A chance of rain
showers. Waves 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots. Patchy fog. Waves subsiding
to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ267-162215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EDT Fri Jun 16 2017

.REST OF TODAY...South winds 5 to 15 knots becoming 10 to 20
knots late. Patchy fog. Scattered showers. Isolated thunderstorms
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots. A chance of rain showers
and a slight chance of thunderstorms. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast late. A
slight chance of thunderstorms through early afternoon. A chance
of rain showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of showers through midnight, then
showers likely after midnight. Areas of fog after midnight. Waves
calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming west 15 to 25 knots
by mid afternoon. Areas of fog. Showers likely through early
afternoon. A chance of showers by mid afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Areas of fog. A chance of rain showers.
Waves building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots. Areas of fog. Waves
subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-162215-
MAFOR 1615/
Superior West 11510 11520 13510 13500. Waves calm to 3 feet.

Superior North Central 12410 14510 12500. Patchy fog late this
morning. Chance of showers late Saturday morning. Waves 1 to 3
feet.

Superior South Central 11400 11300 11400 11500 12510 11500 11400.
Waves 2 feet or less.

Superior East 11400 11300 11410 13510 11410 11400. Patchy fog
late this morning. Chance of showers late tonight through
Saturday 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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