Great Lakes Forecast
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FZUS63 KMQT 161346
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
946 AM EDT Mon Oct 16 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 30.4 inch high pressure will build into the central
Plains and extends a 30.1 inch ridge into the Upper Great Lakes
today. A weak trough of 29.9 inches will move across the Upper
Great Lakes tonight through Tuesday night. A deeper trough of low
pressure at 29.7 inches will sweep through the Upper Great Lakes
on Wednesday before being replaced with a 30.0 inch ridge of high
pressure on Thursday. A 29.9 inch trough will move into the Upper
Great Lakes on Friday

LSZ162-162200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
946 AM EDT Mon Oct 16 2017 /846 AM CDT Mon Oct 16 2017/

.REST OF TODAY...West winds 10 to 20 knots becoming southwest
15 to 25 knots in the afternoon. Waves 1 to 3 feet building to
3 to 5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots late. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest. Waves
subsiding to 1 to 3 feet.
.FRIDAY...South winds 10 to 20 knots. Waves building to 2 to 4
feet.

$$

LSZ263-162200-
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-
946 AM EDT Mon Oct 16 2017

.REST OF TODAY...West winds 10 to 20 knots becoming southwest
15 to 25 knots in the afternoon. Waves 2 to 4 feet building to
3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering west late.
Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing southwest late. Waves subsiding to
1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.FRIDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.

$$

LSZ264-162200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
946 AM EDT Mon Oct 16 2017

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then backing southwest late. Waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering west late.
Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then becoming southwest 5 to 15 knots
late. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. Waves 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...South winds 5 to 15 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ265-162200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
946 AM EDT Mon Oct 16 2017

.REST OF TODAY...West winds 15 to 25 knots. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering west late.
Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ266-162200-
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-
946 AM EDT Mon Oct 16 2017

.REST OF TODAY...West winds 15 to 25 knots. Isolated showers by
early afternoon. Waves 2 to 4 feet building to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering west late.
Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.WEDNESDAY...South winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...West winds 20 to 30 knots becoming southwest 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots. Waves building to 2 to
4 feet.

$$

LSZ267-162200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
946 AM EDT Mon Oct 16 2017

.REST OF TODAY...Southwest winds 15 to 25 knots becoming west
20 to 30 knots in the afternoon, then diminishing to 15 to
25 knots late. Isolated showers by early afternoon. Waves 2 to 4
feet building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.WEDNESDAY...South winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Southwest winds 20 to 30 knots veering west
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.THURSDAY...West winds 20 to 30 knots becoming southwest 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet.
.FRIDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves 1 to 3 feet.

$$
LSZ261-162200-
MAFOR 1615/
Superior West 11520 14530 11530 12620. Waves 1 to 3 feet building
to 4 to 8 feet tonight. Waves subsiding to 2 to 4 feet Tuesday
morning.

Superior North Central 11620 11630 12530 12540 12630. Waves 2 to
4 feet building to 5 to 8 feet tonight and Tuesday morning.

Superior South Central 12620 12520 12530 12630. Waves 1 to 4 feet
building to 3 to 6 feet Tuesday morning.

Superior East 13630 11520 13530 11630. Waves 2 to 5 feet building
to 4 to 7 feet tonight through Tuesday morning.

$$

Borchardt

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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