Great Lakes Forecast
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FZUS63 KMQT 221346
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
946 AM EDT Fri Sep 22 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...Lake Superior will remain situated between a 30.1
inch ridge across the Ohio Valley and a 29.6 inch trough over the
Upper Mississippi Valley through Saturday. The trough will stall
just west of Lake Superior Sunday and Monday while gradually
weakening to 29.9 inches.

LSZ162-222200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
946 AM EDT Fri Sep 22 2017 /846 AM CDT Fri Sep 22 2017/

.REST OF TODAY...South winds 5 to 15 knots becoming east during
the afternoon. Areas of fog. Numerous showers and thunderstorms
through noon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering south after
midnight, then veering southwest late. Areas of fog. Scattered
showers and thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots late. Patchy fog. A chance of showers. A slight chance
of thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots backing northeast after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots veering east. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots veering west. A chance of
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

$$

LSZ263-222200-
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-
946 AM EDT Fri Sep 22 2017

.REST OF TODAY...South winds 5 to 15 knots becoming east in the
afternoon. Areas of fog. Scattered showers and thunderstorms
through early afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming south 10 to 20 knots
after midnight. Areas of fog. Scattered showers and
thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering west late. A slight
chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing east after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east. A chance of
showers. Waves building to 1 to 3 feet.
.TUESDAY...East winds 5 to 15 knots veering west. A chance of
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.

$$

LSZ264-222200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
946 AM EDT Fri Sep 22 2017

.REST OF TODAY...South winds 5 to 15 knots backing southeast
late. Areas of fog. Scattered showers and thunderstorms. Waves
1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Areas of
fog. Scattered showers and thunderstorms. Waves building to 1 to
3 feet.
.SATURDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. A slight chance of showers and thunderstorms by
mid afternoon. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots backing northeast
after midnight. A chance of showers and thunderstorms. Waves
subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east by mid
afternoon. Patchy fog through early afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east. A chance of
showers. Waves building to 1 to 3 feet.
.TUESDAY...East winds 5 to 15 knots veering west. A chance of
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.

$$

LSZ265-222200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
946 AM EDT Fri Sep 22 2017

.REST OF TODAY...South winds 5 to 15 knots backing southeast
late. Areas of fog by late morning. Scattered showers and
thunderstorms in the afternoon. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots veering southwest in the
afternoon, then becoming south 5 to 15 knots late. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots veering southeast. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering west. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-222200-
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-
946 AM EDT Fri Sep 22 2017

.REST OF TODAY...South winds 10 to 20 knots. Areas of fog.
Scattered showers and thunderstorms in the afternoon. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Areas of fog. Isolated
showers and thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY...South winds 15 to 25 knots diminishing to 5 to
15 knots. A slight chance of showers through early afternoon.
Waves 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers and a slight chance
of thunderstorms. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots backing southeast. A chance
of showers. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots veering west. A chance of
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.

$$

LSZ267-222200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
946 AM EDT Fri Sep 22 2017

.REST OF TODAY...South winds 10 to 20 knots. Areas of fog.
Scattered showers and thunderstorms by mid afternoon. Waves calm
to 2 feet.
.TONIGHT...South winds 10 to 20 knots. Isolated showers and
thunderstorms. Patchy fog after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. Patchy fog through early
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots backing southeast. A chance
of showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering west. A chance
of showers. Waves building to 1 to 3 feet.

$$
LSZ261-222200-
MAFOR 2215/
Superior West 10409 11409 11303 12213 11313 11413 12520.
Scattered showers and thunderstorms early this afternoon.
Scattered showers and thunderstorms overnight. Waves 3 feet or
less.

Superior North Central 11413 11403 11303 11213 12313 11423 11520.
Scattered showers and thunderstorms this afternoon and tonight.
Waves 3 feet or less.

Superior South Central 11413 12310 13410 12420. Scattered showers
and thunderstorms this afternoon. Waves 1 to 3 feet.

Superior East 14413 13423 11420. Scattered showers and
thunderstorms late this afternoon. Patchy fog late Saturday
morning. Waves 1 to 3 feet.

$$

BORCHARDT

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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