Great Lakes Forecast
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385
FZUS63 KMQT 222000
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Thu Jun 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...As a 29.5 inch low over northern Ontario drifts to the
Canadian maritime provinces through Sunday, 29.5 inch low pressure
troughing will remain across the Upper Great Lakes. High pressure
ridging of 30.0 inches will build into the Upper Great Lakes late
Sunday into Tuesday as 30.3 inch high pressure shifts eastward
across the Mid Mississippi Valley.

LSZ162-230400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Thu Jun 22 2017 /300 PM CDT Thu Jun 22 2017/

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Isolated showers by mid afternoon. Waves
building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.SUNDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-230400-
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-
400 PM EDT Thu Jun 22 2017

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots. Isolated showers by mid
afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers after
midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-230400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Thu Jun 22 2017

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Patchy
fog. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots. Waves 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots veering west in the
afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A slight chance of showers.
Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. A chance of showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-230400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Thu Jun 22 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering west late.
Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
late. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-230400-
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-
400 PM EDT Thu Jun 22 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Isolated showers far south. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Isolated showers far south through midnight.
Patchy fog. Waves building to 1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots increasing to 15 to 25 knots
in the afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of rain showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west. Waves
building to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-230400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Thu Jun 22 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Scattered showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Patchy fog. Isolated showers. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west in the
afternoon. Isolated showers through early afternoon. Patchy fog.
Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers. Waves calm to 2
feet.
.SATURDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. Waves calm to 2
feet.
.SUNDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to 2
feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots backing south. A chance of
showers. Waves calm to 2 feet.

$$

LSZ261-230400-
MAFOR 2221/
Superior West 14520 11520 13620. Waves 1 to 3 feet.

Superior North Central 16520. Patchy fog through early evening.
Waves 1 to 4 feet.

Superior South Central 11600 11500 11510 13610 12620. Waves 1 to
3 feet.

Superior East 12500 12400 12500 11600 11610. Patchy fog. Waves 2
feet or less.

$$

Kluber

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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