Great Lakes Forecast
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373
FZUS63 KMQT 261347
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
947 AM EDT Mon Jun 26 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 trough over the Upper Great Lakes will
slowly shift southeast and weaken today. A 30.3 inch high pressure
over the Northern Plains this morning will then move over the
Ohio Valley Tuesday and off the East coast on Wednesday. A 29.4
inch low pressure over North Dakota Wednesday morning will reach
Northern Lower Michigan Thursday morning and New England by Friday
morning, as a 29.5 inch low pressure makes its way from the
Central Plains to Iowa.

LSZ162-262200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
947 AM EDT Mon Jun 26 2017 /847 AM CDT Mon Jun 26 2017/

.REST OF TODAY...West winds 5 to 15 knots backing southwest in
the afternoon. Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Rain. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
rain. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ263-262200-
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-
947 AM EDT Mon Jun 26 2017

.REST OF TODAY...West winds 5 to 15 knots backing southwest late.
Scattered rain showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. A slight chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain through early
afternoon, then rain likely by mid afternoon. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots backing northeast
after midnight. Rain likely. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming north 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ264-262200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
947 AM EDT Mon Jun 26 2017

.REST OF TODAY...Northwest winds 5 to 15 knots backing west in
the afternoon. Isolated rain showers. Waves calm to 2 feet
building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of rain. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots. Rain likely. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ265-262200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
947 AM EDT Mon Jun 26 2017

.REST OF TODAY...Northwest winds 10 to 20 knots backing west
late. Scattered showers through late morning. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of rain through early afternoon, then rain
likely by mid afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming east
10 to 20 knots after midnight. Rain. Waves building to 2 to
4 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing north. A
chance of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing north. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-262200-
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-
947 AM EDT Mon Jun 26 2017

.REST OF TODAY...North winds 10 to 20 knots backing northwest in
the afternoon. Patchy fog through early afternoon. Scattered rain
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west after
midnight, then increasing to 10 to 20 knots late. Waves subsiding
to calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing southwest late. Waves building to
1 to 3 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of rain. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming east
10 to 20 knots after midnight. Rain. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...East winds 10 to 20 knots backing north. A chance of
rain showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ267-262200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
947 AM EDT Mon Jun 26 2017

.REST OF TODAY...Northeast winds 10 to 20 knots backing northwest
late. Patchy fog through early afternoon. Numerous rain showers
through late morning, then scattered rain showers. Waves calm to 2
feet building to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of rain by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots becoming east
15 to 25 knots after midnight. Rain likely. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...East winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$
LSZ261-262200-
MAFOR 2615/
Superior West 13510 12610 11600 11610 11510. Waves 1 to 2 feet.

Superior North Central 12610 11620 14610 11620. Waves 1 to 3
feet.

Superior South Central 11720 11710 15610. Scattered showers early
this afternoon. Waves 1 to 3 feet.

Superior East 11810 11710 12720 11710 12600 11610. Patchy fog
late this morning. Scattered showers through early this
afternoon. Waves 1 to 3 feet.

$$

Petro

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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