Great Lakes Forecast
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190
FZUS63 KMQT 190759
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 AM EDT Mon Jun 19 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...Low pressure of 29.3 inches near James Bay will lift
across northern Quebec today, where it will remain nearly stationary
through Wednesday morning. A 30.0 inch ridge over the northern
High Plains will drift to the Upper Great Lakes through
Wednesday. The ridge will move to the Lower Great Lakes on
Thursday as a 29.4 inch low develops near Lake Winnipeg. An
associated 29.7 inch trough will linger over the Upper Great
Lakes through Friday.

LSZ162-191600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 AM EDT Mon Jun 19 2017 /259 AM CDT Mon Jun 19 2017/

.EARLY THIS MORNING...West winds 5 to 15 knots. Isolated showers.
Waves calm to 2 feet.
.TODAY...West winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon. Isolated rain showers. Waves building to 1 to
3 feet.
.TONIGHT...West winds 10 to 20 knots. A slight chance of rain
showers. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. A slight chance of rain showers through early
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. A chance of rain showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering west
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-191600-
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-
359 AM EDT Mon Jun 19 2017

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Patchy fog.
Isolated showers. Waves calm to 2 feet.
.TODAY...West winds 5 to 15 knots. Isolated rain showers. Waves
building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots. A slight chance of rain
showers. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest late. A
slight chance of rain showers through early afternoon. Waves calm
to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds less than 10 knots becoming south
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.

$$

LSZ264-191600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 AM EDT Mon Jun 19 2017

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Patchy fog.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon, then veering west late. Patchy fog through early
afternoon. Isolated rain showers. Waves building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late. A
slight chance of rain showers. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. A slight chance of rain
showers through early afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds less than 10 knots becoming south
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of rain showers. Waves building to 1 to
3 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots veering northwest. Waves
subsiding to calm to 2 feet.

$$

LSZ265-191600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 AM EDT Mon Jun 19 2017

.EARLY THIS MORNING...West winds 10 to 20 knots. Patchy fog.
Isolated showers. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TODAY...West winds 10 to 20 knots. Patchy fog through early
afternoon. Isolated showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. A slight chance of showers after midnight. Waves
calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. A slight chance of showers
through early afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-191600-
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-
359 AM EDT Mon Jun 19 2017

.EARLY THIS MORNING...West winds 10 to 20 knots. Patchy fog.
Isolated rain showers. Waves 2 to 4 feet subsiding to 1 to
3 feet.
.TODAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. Patchy fog through early afternoon. Isolated
rain showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. A slight chance of rain showers after midnight.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots. A slight chance of rain
showers through early afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. A chance of rain showers. Waves
building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots veering northwest. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.

$$

LSZ267-191600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 AM EDT Mon Jun 19 2017

.EARLY THIS MORNING...West winds 15 to 25 knots. Patchy fog.
Isolated rain showers. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TODAY...West winds 10 to 20 knots. Patchy fog through early
afternoon. Isolated rain showers through early afternoon. Waves
subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. A chance of rain showers
through early afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of rain showers. Waves
building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots veering northwest. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ261-191600-
MAFOR 1909/
Superior West 11710 12610 11510 11610 11620 12610. Isolated
showers. Waves 1 to 3 feet.

Superior North Central 11710 12610 11510 11620 13610. Isolated
showers. Patchy fog through early this afternoon. Waves 1 to 3
feet.

Superior South Central 13610 11600 14610. Isolated showers. Patchy
fog through early this afternoon. Waves 1 to 3 feet.

Superior East 11720 14610 11610 11510 11610. Isolated showers.
Patchy fog through early this afternoon. Waves 3 to 5 feet
subsiding to 1 to 3 feet today. Waves 1 to 2 feet tonight.


$$

JLA

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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