Great Lakes Forecast
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FZUS63 KMQT 181950
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
350 PM EDT Wed Apr 18 2018

For waters beyond 5 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 ridge of 30.0 inches over Lake Superior will build
to 30.4 inches tonight through Monday morning before shifting
slowly into the lower Great Lakes.


LSZ162-190400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
350 PM EDT Wed Apr 18 2018 /250 PM CDT Wed Apr 18 2018/

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing southwest in
the afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming west
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY NIGHT...South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots backing south by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds less than 10 knots. Waves calm to
2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest. Waves
building to 1 to 3 feet.
.MONDAY...Southwest winds 5 to 15 knots veering west. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-190400-
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-
350 PM EDT Wed Apr 18 2018

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots diminishing to less than
10 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots backing south by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds less than 10 knots. Waves calm to
2 feet.
.SUNDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-190400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
350 PM EDT Wed Apr 18 2018

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots late. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon, then backing west late. Waves
subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-190400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
350 PM EDT Wed Apr 18 2018

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves 4 to 7 feet occasionally to
9 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West 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 becoming south less than
10 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots veering south. Waves
building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-190400-
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-
350 PM EDT Wed Apr 18 2018

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TONIGHT...North winds 20 to 30 knots. Waves building to 4 to
8 feet occasionally to 10 feet.
.THURSDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest 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.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
Waves building to 2 to 4 feet.
.MONDAY...South winds 10 to 20 knots veering southwest. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-190400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
350 PM EDT Wed Apr 18 2018

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Waves 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...Northwest 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.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
Waves building to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-190400-
MAFOR 1821/
Superior West 11140 11830 12820 11810 11710 11600 11500. Waves 1
to 4 feet.

Superior North Central 13840 11830 12820 11810 11710. Waves 2 to
6 feet.

Superior South Central 11830 13840 12830 12720. Waves 3 to 8 feet.


Superior East 11830 13840 12830 11820 11720. Waves 2 to 6 feet.

$$

KEC

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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