Great Lakes Forecast
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FZUS63 KMQT 101413
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1013 AM EDT Thu Aug 10 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 low pressure over northwest Wisconsin
will reach northern Lake Michigan tonight and eastern Ontario
Saturday morning while deepening to 29.8 inches. A 30.1 inch high
pressure over the northern Plains will move over the western Great
Lakes Sunday, then remain nearly stationary through Monday.

LSZ162-102215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1013 AM EDT Thu Aug 10 2017 /913 AM CDT Thu Aug 10 2017/

.REST OF TODAY...Northeast winds 15 to 25 knots. Numerous showers
becoming scattered showers by early afternoon. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing north after
midnight. A slight chance of showers through midnight. Waves
subsiding to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then veering south late. Waves subsiding to
calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-102215-
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-
1013 AM EDT Thu Aug 10 2017

.REST OF TODAY...East winds 10 to 20 knots backing northeast in
the afternoon. Numerous showers becoming scattered by early
afternoon. Isolated thunderstorms. Waves 3 to 6 feet occasionally
to 8 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing north after
midnight, then diminishing to 5 to 15 knots late. Patchy fog. A
slight chance of showers. Waves subsiding to 2 to 4 feet.
.FRIDAY...North winds 5 to 15 knots. Patchy fog through early
afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...West winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-102215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1013 AM EDT Thu Aug 10 2017

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing northeast late. Numerous
showers. Patchy fog by mid afternoon. Waves calm to 2 feet
building to 2 to 4 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing north late.
Areas of fog. A chance of showers. Waves 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. Patchy fog through early afternoon. A slight
chance of showers through early afternoon. Waves subsiding to
1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-102215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1013 AM EDT Thu Aug 10 2017

.REST OF TODAY...East winds 10 to 20 knots. Numerous showers
becoming scattered by mid afternoon. Scattered thunderstorms.
Patchy fog by mid afternoon. Waves calm to 2 feet building to 2
to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming north 10 to
20 knots late. Areas of fog. A slight chance of thunderstorms
through midnight. A chance of showers. Waves 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots late. Patchy fog through early afternoon. A slight
chance of showers. Waves 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Patchy fog. Waves calm to
2 feet.

$$

LSZ266-102215-
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-
1013 AM EDT Thu Aug 10 2017

.REST OF TODAY...East winds 10 to 20 knots diminishing to 5 to
15 knots late. Numerous showers becoming scattered by mid
afternoon. Scattered thunderstorms. Patchy fog by mid afternoon.
Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast 10 to
20 knots late. Areas of fog. A slight chance of thunderstorms
through midnight. A chance of showers. Waves 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots. Patchy fog through early
afternoon. A chance of showers. Waves 2 to 4 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Patchy fog. Waves calm to
2 feet.

$$

LSZ267-102215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1013 AM EDT Thu Aug 10 2017

.REST OF TODAY...East winds 10 to 20 knots veering southeast
late. Numerous showers and scattered thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots backing east after
midnight, then diminishing to 5 to 15 knots late. Patchy fog. A
chance of showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon. Patchy fog through early afternoon. A
chance of showers. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. A slight chance of
showers. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Patchy fog. Waves calm to
2 feet.

$$
LSZ261-102215-
MAFOR 1015/
Superior West 14130 11120 13820. Scattered showers through early
evening. Waves 1 to 6 feet.

Superior North Central 12226 11120 13123 11120 11820. Chance of
showers through midnight. Patchy fog Friday morning. Waves 1 to 4
feet.

Superior South Central 11326 13210 12113 11813 11820. Scattered
showers and thunderstorms through midnight. Chance of showers
overnight through Friday morning. Patchy fog through Friday
morning. Waves 1 to 4 feet.


Superior East 11216 12226 11216 11210 11213 12110. Patchy fog in
the evening through Friday morning. Scattered thunderstorms
through early evening. Chance of showers from late evening through
Friday morning. 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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