Great Lakes Forecast
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FZUS63 KMQT 221408
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1008 AM 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...A 29.9 inch ridge over the Lower Great Lakes will
move to the eastern seaboard today as a trough of 29.7 inches
moves over Lake Superior this morning. Low pressure troughing of
29.5 inches will then remain over the Upper Great Lakes into
Sunday. High pressure ridging of 30.0 inches will build into the
Lower Great Lakes Sunday into Monday.

LSZ162-222215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1008 AM EDT Thu Jun 22 2017 /908 AM CDT Thu Jun 22 2017/

.REST OF TODAY...Southwest winds 5 to 15 knots increasing to
10 to 20 knots late. Waves calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots. Isolated showers.
Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the 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. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of rain showers. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ263-222215-
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-
1008 AM EDT Thu Jun 22 2017

.REST OF TODAY...West winds 5 to 15 knots backing southwest in
the afternoon. Waves calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Isolated showers. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A slight chance of showers through early
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. 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 less than 10 knots becoming
northwest 5 to 15 knots after midnight. A chance of rain showers.
Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west. A chance of
rain showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-222215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1008 AM EDT Thu Jun 22 2017

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

$$

LSZ265-222215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1008 AM EDT Thu Jun 22 2017

.REST OF TODAY...South winds 5 to 15 knots veering west in the
afternoon, then becoming southwest 10 to 20 knots late. Waves
calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering west late.
Patchy fog through midnight. Isolated showers. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots increasing to 15 to 25 knots
in the afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots. A slight chance of
showers after midnight. Waves 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-222215-
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-
1008 AM EDT Thu Jun 22 2017

.REST OF TODAY...South winds 10 to 20 knots becoming southwest
5 to 15 knots in the afternoon. Patchy fog. Isolated showers by
mid afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Patchy fog. Isolated rain showers. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots increasing to 15 to 25 knots.
Patchy fog through early afternoon. A slight chance of rain
showers through early afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ267-222215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1008 AM EDT Thu Jun 22 2017

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

$$
LSZ261-222215-
MAFOR 2215/
Superior West 13510 14520 11620. Waves 1 to 2 feet.

Superior North Central 11520 11510 13520 11620 11610 11620.
Patchy fog this afternoon and evening. Waves 1 to 2 feet.

Superior South Central 11510 11610 13510 13610. Patchy fog
tonight and Friday morning. Waves 1 to 2 feet.

Superior East 11410 12510 11500 11400 11500 11510 11500. Patchy
fog this afternoon. Waves 1 to 3 feet.

$$

JSS

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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