Great Lakes Forecast
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FZUS63 KMQT 211951
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 PM EDT Wed Jun 21 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 ridge over the Lower Great Lakes will move
to the eastern seaboard by Thursday as a trough of 29.7 inches moves
across Lake Superior. Low pressure troughing of 29.5 inches will
then remain over the Upper Great Lakes into Sunday. High pressure
ridging of 30.0 inches will build into the Lower Great Lakes Sunday
into Monday.

LSZ162-220400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 PM EDT Wed Jun 21 2017 /251 PM CDT Wed Jun 21 2017/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots. A chance of showers and a
slight chance of thunderstorms by late evening. Waves calm to 2
feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A slight chance of showers through midnight.
Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots. A slight chance of showers
by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. A chance of rain showers. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of rain showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ263-220400-
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-
351 PM EDT Wed Jun 21 2017

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots backing east.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. A chance
of showers and a slight chance of thunderstorms by midnight.
Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest late. A
slight chance of showers through early afternoon. Waves calm to
2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
late. A slight chance of showers through midnight. Patchy fog
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers by mid afternoon.
Waves building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. Waves subsiding to
calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.

$$

LSZ264-220400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 PM EDT Wed Jun 21 2017

.LATE THIS AFTERNOON...South winds 5 to 15 knots backing
southeast. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. A chance of rain
showers and slight chance of thunderstorms after midnight. Waves
building to 1 to 3 feet.
.THURSDAY...South winds 5 to 15 knots veering southwest in the
afternoon. A slight chance of rain showers through early
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
late. Patchy fog. Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots. Patchy fog through early
afternoon. A slight chance of rain showers. Waves building to
2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of rain showers. 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.

$$

LSZ265-220400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 PM EDT Wed Jun 21 2017

.LATE THIS AFTERNOON...East winds 5 to 15 knots increasing to 10
to 20 knots. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south late. A
chance of showers and slight chance of thunderstorms after
midnight. Waves building to 2 to 4 feet.
.THURSDAY...South winds 10 to 20 knots veering west in the
afternoon. A slight chance of showers. Waves subsiding to calm to
2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots veering west
late. A slight chance of showers. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-220400-
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-
351 PM EDT Wed Jun 21 2017

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots becoming
southeast 10 to 20 knots. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 15 to
25 knots late. A chance of rain showers and slight chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.THURSDAY...South winds 10 to 20 knots veering west late. A
chance of rain showers. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots becoming west
5 to 15 knots late. Patchy fog. A slight chance of rain showers.
Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Patchy fog through early afternoon. A
slight chance of rain showers. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-220400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 PM EDT Wed Jun 21 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots becoming east.
Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots. A chance of showers
overnight. Waves building to 1 to 3 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering south in the
afternoon, then becoming southwest 5 to 15 knots late. A chance
of showers. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight, then becoming west 5 to 15 knots
late. Patchy fog. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots. A slight chance of rain
showers through early afternoon. Patchy fog. Waves building to
2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ261-220400-
MAFOR 2121/
Superior West 11200 12210 11200 11300 11600 11610 11510. Chance
of showers overnight. Waves 2 feet or less.

Superior North Central 11300 14310 11410 11510 11610. Chance of
showers overnight through mid morning Thursday. Waves 1 to 3
feet.

Superior South Central 13310 11320 11420 12410 11610. Chance of
showers overnight through mid morning Thursday. Waves 4 feet or
less.

Superior East 11300 13310 12320 11410 11510. Chance of showers
late tonight and Thursday morning. 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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