Great Lakes Forecast
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FZUS63 KMQT 100210
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1010 PM EDT Wed Aug 9 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 western Minnesota will
move eastward to northern Lake Michigan through Thursday night
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.

LSZ162-101015-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1010 PM EDT Wed Aug 9 2017 /910 PM CDT Wed Aug 9 2017/

.REST OF TONIGHT...East winds 5 to 15 knots increasing to 15 to
25 knots. Areas of fog. Showers and a slight chance of
thunderstorms. Waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...East winds 10 to 20 knots backing northeast in the
afternoon, then increasing to 15 to 25 knots late. Areas of fog.
Showers likely. Isolated thunderstorms by mid afternoon. Waves
subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots backing north
late. A slight chance of showers through midnight. Waves
subsiding to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots becoming south 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...West winds less than 10 knots becoming northwest
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-101015-
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-
1010 PM EDT Wed Aug 9 2017

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

$$

LSZ264-101015-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1010 PM EDT Wed Aug 9 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots. Patchy fog. A
chance of showers and isolated thunderstorms through midnight.
Showers likely after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then diminishing to 5 to 15 knots late. Areas
of fog. Showers likely and isolated thunderstorms. Waves building
to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. Areas of fog. A
slight chance of thunderstorms through midnight. A chance of
showers. Waves building to 2 to 4 feet.
.FRIDAY...North winds 5 to 15 knots. Patchy fog through early
afternoon. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west 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. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ265-101015-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1010 PM EDT Wed Aug 9 2017

.REST OF TONIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight, then veering southwest late. A
chance of showers through midnight. Showers likely after
midnight. Patchy fog after midnight. A slight chance of
thunderstorms. Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots veering southeast in the
afternoon, then backing east late. Patchy fog. Showers likely and
scattered thunderstorms. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots backing northeast
after midnight. Patchy fog. A slight chance of thunderstorms
through midnight. A chance of showers. Waves 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Patchy fog through early afternoon. A
slight chance of showers through early afternoon. Waves 1 to
3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Waves 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.
.MONDAY...West winds 5 to 15 knots veering north. Patchy fog.
Waves calm to 2 feet.

$$

LSZ266-101015-
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-
1010 PM EDT Wed Aug 9 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Patchy fog. A slight chance of showers through
midnight. Showers likely after midnight. Isolated thunderstorms.
Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots in the afternoon, then becoming east 10 to 20 knots
late. Patchy fog. Showers likely and scattered thunderstorms.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming northeast
10 to 20 knots late. Areas of fog. Showers likely and a slight
chance of thunderstorms through midnight. A chance of showers
after midnight. Waves 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots. Patchy fog through early
afternoon. A slight chance of showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Waves 1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots becoming northwest 5 to
15 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 veering northwest. Patchy fog.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-101015-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1010 PM EDT Wed Aug 9 2017

.REST OF TONIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of showers and isolated
thunderstorms. Patchy fog after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots backing east late.
Patchy fog. Showers likely and scattered thunderstorms. Waves
calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots. Patchy fog. Showers
likely through midnight. A chance of thunderstorms. A chance of
showers after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots by mid afternoon. Patchy fog through early afternoon. A
chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots. Patchy fog. Waves calm
to 2 feet.

$$
LSZ261-101015-
MAFOR 1003/
Superior West 11216 11226 11236 11226 11126 11136 11130 11120.
Patchy fog overnight and Thursday afternoon. Chance of showers
Thursday evening. Waves 1 to 4 feet overnight. Waves 2 to 5 feet
Thursday and Thursday evening.

Superior North Central 11200 11216 11306 11216 13226 11113.
Chance of showers overnight. Patchy fog overnight through mid
morning Thursday. Chance of showers Thursday evening. Waves 1 to 3
feet.

Superior South Central 11300 11400 11416 11226 12326 11216 11210.
Chance of showers overnight. Patchy fog overnight and Thursday.
Scattered thunderstorms Thursday afternoon through early
evening. Chance of showers late Thursday evening. Waves 3 feet or
less.

Superior East 11300 12400 12316 11326 11226 11216. Patchy fog.
Chance of showers overnight. Scattered thunderstorms late
Thursday late afternoon through late evening. Waves 1 to 3 feet.

$$

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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