Great Lakes Forecast
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FZUS63 KMQT 231351
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
951 AM EDT Fri Jun 23 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 near James Bay drifts to the
Canadian maritime provinces through Sunday, 29.6 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. Tuesday into Wednesday, low
pressure of 29.5 inches will lift out of the Northern Plains and
head towards the Upper Great Lakes.

LSZ162-232200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
951 AM EDT Fri Jun 23 2017 /851 AM CDT Fri Jun 23 2017/

.REST OF TODAY...Southwest winds 15 to 25 knots veering west in
the afternoon. A slight chance of showers by mid afternoon. Waves
1 to 3 feet building to 2 to 4 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
late. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. A chance of rain 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. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south. A chance
of showers. Waves building to 1 to 3 feet.

$$

LSZ263-232200-
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-
951 AM EDT Fri Jun 23 2017

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of rain showers by mid afternoon.
Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. A slight chance of rain showers. Waves subsiding
to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ264-232200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
951 AM EDT Fri Jun 23 2017

.REST OF TODAY...Southwest winds 10 to 20 knots veering west
late. Patchy fog through early afternoon. A slight chance of rain
showers by mid afternoon. Waves 1 to 3 feet building to 3 to 6
feet occasionally to 8 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. A slight chance of rain showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west in the
afternoon. A slight chance of rain showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. 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. A chance of rain
showers. Waves building to 2 to 4 feet, then subsiding to calm to
2 feet.

$$

LSZ265-232200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
951 AM EDT Fri Jun 23 2017

.REST OF TODAY...West winds 10 to 20 knots increasing to 20 to
30 knots. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. A slight chance of
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. A slight chance of
showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. 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 building to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ266-232200-
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-
951 AM EDT Fri Jun 23 2017

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Patchy fog. Waves 1 to 3 feet building
to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of rain showers. Waves subsiding
to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
rain showers. 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 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ267-232200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
951 AM EDT Fri Jun 23 2017

.REST OF TODAY...Southwest winds 5 to 15 knots veering west in
the afternoon, then increasing to 10 to 20 knots late. Patchy
fog. Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots late. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of rain showers. 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 diminishing to
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 building to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet.

$$
LSZ261-232200-
MAFOR 2315/
Superior West 13630 14620 11610. Chance of showers Saturday
morning. Waves 1 to 4 feet.

Superior North Central 11520 12630 11620 12710 12700. Patchy fog
through this afternoon. Waves 1 to 5 feet.

Superior South Central 13630 14620 11610. Patchy fog through
early afternoon. Waves 1 to 3 feet.

Superior East 11600 13620 11610 11710 12700. Patchy fog through
this afternoon. Waves 1 to 3 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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