Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FZUS63 KMQT 191353
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
953 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 shift over 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.

LSZ162-192200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
953 AM EDT Mon Jun 19 2017 /853 AM CDT Mon Jun 19 2017/

.REST OF TODAY...West winds 10 to 20 knots. Isolated showers by
mid afternoon. Waves calm to 2 feet 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.

$$

LSZ263-192200-
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-
953 AM EDT Mon Jun 19 2017

.REST OF TODAY...West winds 5 to 15 knots. Isolated showers.
Waves calm to 2 feet 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.

$$

LSZ264-192200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
953 AM EDT Mon Jun 19 2017

.REST OF TODAY...West winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. Patchy fog. Waves calm to
2 feet 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.

$$

LSZ265-192200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
953 AM EDT Mon Jun 19 2017

.REST OF TODAY...West winds 10 to 20 knots. Patchy fog. 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.

$$

LSZ266-192200-
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-
953 AM EDT Mon Jun 19 2017

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Patchy fog. Isolated rain showers by
mid afternoon. Waves 1 to 3 feet 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.

$$

LSZ267-192200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
953 AM EDT Mon Jun 19 2017

.REST OF TODAY...West winds 10 to 20 knots. Patchy fog. Waves
1 to 3 feet 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.

$$
LSZ261-192200-
MAFOR 1915/
Superior West 11610 11510 11610 11620 13610 11600. Waves 1 to 3
feet.

Superior North Central 11610 11510 11620 13610 12710. Patchy fog
this afternoon and evening. Waves 1 to 3 feet.

Superior South Central 11610 11600 14610 11620 11610. Patchy fog
late this morning. Waves 1 to 3 feet.

Superior East 14610 11510 13610. Patchy fog this afternoon through
late tonight. Waves 1 to 3 feet.


$$

JSS

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.