Great Lakes Forecast
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FZUS63 KMQT 250133
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
933 PM EDT Thu May 24 2018

For waters beyond 5 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...High pressure of 30.2 inches over the lower Great
Lakes will slide off the east coast on Friday as low pressure of
29.6 inches expands from the Canadian prairies to the western
Great Lakes. Expect the low pressure trough to diminish to 29.9
inches by Monday as it moves to the lower Great Lakes. High
pressure of 30.1 inches will then build across northern Ontario
and the upper Great Lakes by late Monday.

LSZ162-250945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
933 PM EDT Thu May 24 2018 /833 PM CDT Thu May 24 2018/

.REST OF TONIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering south late. Widespread
fog. Scattered showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...South winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then backing south late. Patchy fog. A
slight chance of showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Areas of fog. A
slight chance of showers and thunderstorms. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Areas of fog. A chance of rain showers. A slight
chance of thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. Patchy fog. Waves calm to
2 feet.
.SUNDAY...Southwest winds less than 10 knots backing south by mid
afternoon. Patchy fog. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds less than 10 knots veering northwest
after midnight. Waves calm to 2 feet.
.MONDAY...West winds less than 10 knots becoming east 5 to
15 knots. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. A chance of showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-250945-
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-
933 PM EDT Thu May 24 2018

.REST OF TONIGHT...East winds 10 to 20 knots becoming south 5 to
15 knots after midnight. Widespread fog. Scattered showers and
thunderstorms. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Patchy fog. A slight
chance of showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Areas of fog. A
chance of rain showers and a slight chance of thunderstorms.
Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Areas of fog. A chance
of rain showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. Patchy fog. A chance of rain
showers. Waves calm to 2 feet.
.SUNDAY...West winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. Patchy fog. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots veering west
after midnight. Waves calm to 2 feet.
.MONDAY...West winds less than 10 knots becoming east 5 to
15 knots. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering south. Waves building
to 1 to 3 feet.

$$

LSZ264-250945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
933 PM EDT Thu May 24 2018

.REST OF TONIGHT...East winds 5 to 15 knots veering south after
midnight. Widespread fog. Scattered showers and thunderstorms.
Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots. Patchy fog. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight, then backing northeast late. Areas of fog. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Areas of fog. A chance of rain
showers. A slight chance of thunderstorms by mid afternoon. Waves
calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. Patchy fog. A chance of rain showers. Waves calm to
2 feet.
.SUNDAY...West winds 5 to 15 knots. Patchy fog. Waves calm to
2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots.
Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots veering south. Waves
building to 2 to 4 feet.

$$

LSZ265-250945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
933 PM EDT Thu May 24 2018

.REST OF TONIGHT...South winds 5 to 15 knots veering west after
midnight, then backing south late. Widespread fog. Scattered
showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing southeast late.
Patchy fog. A chance of showers and thunderstorms. Waves calm to
2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Areas of fog. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Areas of fog. A chance of
rain showers. A slight chance of thunderstorms by mid afternoon.
Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots backing northwest
after midnight. Patchy fog. A chance of rain showers. Waves calm
to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots. Patchy fog. Waves calm
to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering east. Waves calm to
2 feet.
.TUESDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 1 to 3 feet.

$$

LSZ266-250945-
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-
933 PM EDT Thu May 24 2018

.REST OF TONIGHT...South winds 5 to 15 knots. Widespread fog.
Scattered showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming southeast 5 to 15 knots
late. Patchy fog. A chance of showers and thunderstorms. Waves
calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Areas of fog. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Areas of fog. A slight chance of rain showers. A
slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Patchy fog. A chance of rain showers. Waves calm
to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Patchy fog. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.TUESDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 2 to 4 feet.

$$

LSZ267-250945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
933 PM EDT Thu May 24 2018

.REST OF TONIGHT...South winds 5 to 15 knots. Widespread fog.
Scattered rain showers by late evening. Scattered thunderstorms.
Numerous rain showers after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast in the
afternoon. Patchy fog. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southeast
5 to 15 knots late. Areas of fog. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Areas of fog. A chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Patchy fog. A chance of rain showers. Waves calm
to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots veering west by mid
afternoon. Patchy fog. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots becoming northeast 5 to
15 knots. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves building to 1 to 3 feet.

$$
LSZ261-250945-
MAFOR 2503/
Superior West 11203 11303 11503 13500 11400 11513. Scattered rain
showers and thunderstorms late this evening through mid morning
Friday. Chance of showers late Friday evening. Waves 2 feet or
less.

Superior North Central 11303 12403 11400 11500 12400 11403.
Scattered showers and thunderstorms overnight through mid morning
Friday. Chance of showers and thunderstorms Friday evening. Waves
1 foot or less.

Superior South Central 11513 11503 11403 11500 11400 11303 11310
11413. Scattered showers and thunderstorms overnight. Patchy fog
late Friday morning. Scattered thunderstorms with a chance of
showers through mid morning, then chance of showers late Friday
morning. Chance of showers and thunderstorms late Friday. Chance
of showers and thunderstorms Friday evening. Waves 2 feet or
less.

Superior East 11413 11416 11406 12400 12300 11423. Scattered
showers and thunderstorms after midnight. Scattered thunderstorms
late overnight. Patchy fog late Friday morning. Patchy fog late
friday. Scattered thunderstorms through mid morning, then chance
of showers late Friday morning. Chance of showers and
thunderstorms late Friday. Waves 1 to 2 feet.

$$

Titus

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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