Great Lakes Forecast
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FZUS63 KMQT 150151
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
951 PM EDT Mon Aug 14 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 29.8 inch trough just east of Lake Superior late
this evening will track eastward tonight as high pressure of 30.0
inches builds into northwest Ontario. The high will then settle
over the Upper Great Lakes on Tuesday. As the high shifts east
Tuesday night and Wednesday, low pressure of 29.7 inches will
organize over the Central Plains. The low will track northeast
across the Upper Great Lakes on Thursday and reach the Lower Great
Lakes on Friday. In its wake, high pressure of 30.0 inches will
shift east to the western Great Lakes and expand over the Great
Lakes region Saturday.

LSZ162-151000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
951 PM EDT Mon Aug 14 2017 /851 PM CDT Mon Aug 14 2017/

.REST OF TONIGHT...Southwest winds less than 10 knots becoming
west 5 to 15 knots late. Widespread fog after midnight. Waves
calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Widespread fog through mid morning. Waves calm to 2
feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots by mid afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves 2 to
4 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ263-151000-
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 PM EDT Mon Aug 14 2017

.REST OF TONIGHT...West winds less than 10 knots increasing to
5 to 15 knots late. Widespread fog after midnight. Waves calm to
2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Patchy fog through mid morning. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers through midnight.
Showers after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.THURSDAY...East winds 15 to 25 knots backing northeast by mid
afternoon. Showers likely through early afternoon, then a chance
of showers by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots. A chance of
showers. Waves subsiding to 1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ264-151000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
951 PM EDT Mon Aug 14 2017

.REST OF TONIGHT...West winds less than 10 knots becoming north
5 to 15 knots late. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east late. Waves
calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots becoming southeast less
than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. A slight chance of showers by mid afternoon. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of showers through midnight.
Showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...East winds 15 to 25 knots. Showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of showers. Waves subsiding to 2 to
4 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ265-151000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
951 PM EDT Mon Aug 14 2017

.REST OF TONIGHT...West winds 5 to 15 knots. Patchy fog after
midnight. Waves calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots veering southeast
late. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Showers likely after midnight. Waves building to
2 to 4 feet.
.THURSDAY...Southeast winds 15 to 25 knots backing east by mid
afternoon. Showers likely. Waves building to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. A chance of showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ266-151000-
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 PM EDT Mon Aug 14 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots backing west
after midnight, then becoming northwest 10 to 20 knots late.
Patchy fog after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves building to 1 to 3 feet then
subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering east late.
Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southeast winds 15 to 25 knots backing east by mid
afternoon. Showers. Waves building to 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots becoming north
15 to 25 knots after midnight. A chance of showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ267-151000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
951 PM EDT Mon Aug 14 2017

.REST OF TONIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots late. Patchy fog after midnight. Waves calm to
2 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then veering east late. Waves calm
to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...Southeast winds 20 to 30 knots. Showers likely. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots backing east
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet.
.FRIDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots. Waves calm to 2 feet.

$$
LSZ261-151000-
MAFOR 1503/
Superior West 11500 11603 11703 11103 12200 12210. Waves 1 foot
or less.

Superior North Central 12600 11700 11800 13100 11600. Waves 1
foot or less.

Superior South Central 12600 11610 11710 11810 12800 11100.
Patchy fog overnight through mid morning Tuesday. Waves 2 feet or
less.

Superior East 12700 11710 12800 11700 12710. Patchy fog late
overnight through mid morning Tuesday. 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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