Great Lakes Forecast
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FZUS63 KMQT 290805
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
405 AM EDT Thu Jun 29 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...29.5 inch low pressure will track eastward across
southern Lake Superior through the day today before lifting into
Ontario by Friday morning. A 29.7 inch trough will then linger
over the Upper Great Lakes into Saturday night. The trough will
lift to the northeast on Sunday ahead of a 30.0 inch ridge
building across the Upper Mississippi Valley and western Great
Lakes Monday into Tuesday.

LSZ162-291615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
405 AM EDT Thu Jun 29 2017 /305 AM CDT Thu Jun 29 2017/

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Areas of
fog. Showers likely. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Patchy fog. A chance of showers. Waves
subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Areas of fog. A slight
chance of showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing southwest in the
afternoon, then backing south late. A chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.
.MONDAY...East winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ263-291615-
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-
405 AM EDT Thu Jun 29 2017

.EARLY THIS MORNING...East winds 10 to 20 knots. Areas of fog.
Showers. Waves 2 to 4 feet.
.TODAY...Northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon. Areas of fog. A chance of showers.
Waves subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots. Areas of fog. A slight
chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots becoming west less than
10 knots in the afternoon. A chance of showers. Waves calm to
2 feet.
.FRIDAY NIGHT...Northwest winds less than 10 knots backing west
after midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.

$$

LSZ264-291615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
405 AM EDT Thu Jun 29 2017

.EARLY THIS MORNING...East winds 10 to 20 knots. Widespread fog.
Showers likely. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TODAY...East winds 10 to 20 knots backing northeast in the
afternoon, then becoming north 5 to 15 knots late. Widespread fog
through early afternoon, then areas of fog by mid afternoon.
Showers through early afternoon, then a chance of showers by mid
afternoon. Waves subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots. Areas of fog through
midnight. Widespread fog after midnight. A chance of showers.
Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest late. A
chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds less than 10 knots. A slight
chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds less than 10 knots veering south. Waves calm
to 2 feet.

$$

LSZ265-291615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
405 AM EDT Thu Jun 29 2017

.EARLY THIS MORNING...East winds 10 to 20 knots. Areas of fog.
Showers likely. Waves 2 to 4 feet.
.TODAY...East winds 10 to 20 knots backing northwest in the
afternoon. Areas of fog. Showers likely through early afternoon.
A chance of showers by mid afternoon. Waves subsiding to 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Areas of fog. A chance of showers. Waves subsiding
to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers. Waves calm
to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.

$$

LSZ266-291615-
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-
405 AM EDT Thu Jun 29 2017

.EARLY THIS MORNING...East winds 10 to 20 knots. Areas of fog.
Showers likely. Waves 3 to 5 feet occasionally to 7 feet subsiding
to 2 to 4 feet.
.TODAY...East winds 10 to 20 knots backing northeast in the
afternoon, then backing northwest late. Areas of fog. A chance of
showers. Waves subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering north late. Areas of fog. A
chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.
.MONDAY...North winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ267-291615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
405 AM EDT Thu Jun 29 2017

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. Areas of fog.
Showers likely. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TODAY...Southeast winds 10 to 20 knots becoming west 5 to
15 knots late. Areas of fog. Showers likely through early
afternoon. A chance of showers by mid afternoon. Waves subsiding
to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. Areas of fog. A chance of showers. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-291615-
MAFOR 2909/
Superior West 11136 11826 14710 11713 11703. Patchy fog. Rain
showers likely through the morning then a chance of showers this
afternoon. Waves 1 to 4 feet.

Superior North Central 12236 11126 11123 11813 13823. Patchy fog. Chance
of showers. Waves 2 to 5 feet.

Superior South Central 12216 11113 11713 14723. Patchy fog.
Chance of showers. Waves 2 to 3 feet.

Superior East 13226 11213 13713 11703. Patchy fog. Showers likely
this morning then a chance of showers late. Waves 1 to 5 feet.

$$

Ritzman

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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