Great Lakes Forecast
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FZUS63 KMQT 180759
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 AM EDT Sun Jun 18 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 29.5 inches over central Upper Michigan
will deepen to 29.3 inches while moving east of Lake Superior
this evening. The low will lift to James Bay and northern Quebec
on Monday, where it will remain nearly stationary through Wednesday
morning. A 30.0 inch ridge drifting across the northern Plains on
Monday will then move to the Upper Great Lakes through Wednesday.
The ridge will move to the Lower Great Lakes on Thursday as a
29.6 inch low develops over the Upper Mississippi Valley.

LSZ162-181600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 AM EDT Sun Jun 18 2017 /259 AM CDT Sun Jun 18 2017/

.EARLY THIS MORNING...Variable winds less than 10 knots becoming
northwest 5 to 15 knots. Areas of fog. Scattered showers. Waves
calm to 2 feet.
.TODAY...Northwest winds less than 10 knots becoming west 5 to
15 knots in the afternoon. Areas of fog. Scattered showers. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. A slight chance of showers.
Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A slight chance of showers.
Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of rain showers. Waves
calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering west. Waves
calm to 2 feet.

$$

LSZ263-181600-
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 Sun Jun 18 2017

.EARLY THIS MORNING...Variable winds less than 10 knots becoming
north. Areas of fog. Numerous showers. Waves calm to 2 feet.
.TODAY...North winds less than 10 knots becoming west 5 to
15 knots in the afternoon. Areas of fog. Scattered showers. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late.
Patchy fog through midnight. A chance of showers. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then veering west late. A slight chance of rain
showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. 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 east. A chance of
rain showers. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.

$$

LSZ264-181600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 AM EDT Sun Jun 18 2017

.EARLY THIS MORNING...Northeast winds less than 10 knots. Areas
of fog. Scattered rain showers. Waves calm to 2 feet.
.TODAY...North winds 5 to 15 knots backing northwest in the
afternoon. Areas of fog. Numerous rain showers through early
afternoon. Scattered rain showers by mid afternoon. Waves calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Areas of fog through
midnight. A chance of rain showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest late. A
slight chance of rain showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds less than 10 knots becoming southeast
5 to 15 knots. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering west. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ265-181600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 AM EDT Sun Jun 18 2017

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Areas of
fog. Showers and isolated thunderstorms developing. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots backing northwest in the
afternoon, then increasing to 10 to 20 knots late. Areas of fog.
Showers. Isolated thunderstorms through early afternoon. Waves
calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots. Areas of fog through
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. A slight chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering west. Waves
calm to 2 feet.

$$

LSZ266-181600-
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 Sun Jun 18 2017

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Areas of
fog. Showers and isolated thunderstorms developing. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon. Areas of fog. Showers. Scattered
thunderstorms through early afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Areas of fog. A chance
of rain showers. Waves building to 1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west in the
afternoon, then diminishing to 5 to 15 knots late. A slight
chance of rain showers. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots becoming west 10 to
20 knots after midnight. A slight chance of rain showers after
midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering southwest.
Waves building to 1 to 3 feet.

$$

LSZ267-181600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 AM EDT Sun Jun 18 2017

.EARLY THIS MORNING...East winds 5 to 15 knots. Areas of fog.
Showers and isolated thunderstorms developing. Waves calm to 2
feet.
.TODAY...Northeast winds 5 to 15 knots backing north in the
afternoon, then becoming northwest 10 to 20 knots late. Areas of
fog. Showers and scattered thunderstorms. Waves calm to 2 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Areas of fog. A chance of rain showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots. A slight chance of rain
showers through early afternoon. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A slight chance of rain
showers after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering south. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ261-181600-
MAFOR 1809/
Superior West 11903 11803 12603 11600 11700 12710. Scattered
showers through this evening. Patchy fog through early evening.
Waves 1 foot or less.

Superior North Central 11103 12806 11716 12713 12710. Areas of
fog. Scattered showers early this morning. Scattered showers late
today into tonight. Waves 2 feet or less.

Superior South Central 12806 11816 12716 11713 11610 11620.
Areas of fog. Chance of showers tonight. Waves 2 feet or less
today. Waves 1 to 3 feet tonight.

Superior East 11103 11106 11816 13726 12723. Areas of fog. Scattered
thunderstorms through early this afternoon. Chance of showers
overnight. Waves 2 feet or less today. Waves 2 to 4 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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