Great Lakes Forecast
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FZUS63 KMQT 160748
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
348 AM EDT Wed May 16 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...A low pressure system of 29.8 inches will pass
through southern Ontario and Lake Superior today followed by a
strengthening high pressure system of 30.4 inches. The
aforementioned high pressure system will persist through Friday
before a low pressure trough averaging 29.9 inches swings through
this weekend.

LSZ162-161600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
348 AM EDT Wed May 16 2018 /248 AM CDT Wed May 16 2018/

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TODAY...Southwest winds 10 to 20 knots becoming northeast 5 to
15 knots late. A slight chance of rain showers. A slight chance
of thunderstorms by mid afternoon. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.TONIGHT...East winds 15 to 25 knots backing northeast after
midnight, then diminishing to 10 to 20 knots late. A slight
chance of rain showers through midnight. 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. A slight chance of
rain showers. Waves building to 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight. A slight chance of rain showers.
Waves subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.

$$

LSZ263-161600-
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-
348 AM EDT Wed May 16 2018

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. A slight
chance of rain showers. Waves 1 to 3 feet building to 2 to
4 feet.
.TODAY...Southwest winds 10 to 20 knots veering west in the
afternoon, then veering northeast late. A slight chance of rain
showers. Waves subsiding to 1 to 3 feet.
.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northeast late. Waves building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ264-161600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
348 AM EDT Wed May 16 2018

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves 1 to 3 feet.
.TODAY...Southwest winds 10 to 20 knots veering west in the
afternoon, then veering north late. A slight chance of showers
and thunderstorms through early afternoon. Waves 1 to 3 feet.
.TONIGHT...North winds 15 to 25 knots becoming northeast 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ265-161600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
348 AM EDT Wed May 16 2018

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Waves 1 to
3 feet.
.TODAY...Southwest winds 10 to 20 knots veering west in the
afternoon, then veering north late. Waves subsiding to calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then becoming northeast 10 to 20 knots late. Waves
building to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots becoming northeast 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north. A
chance of rain showers. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.

$$

LSZ266-161600-
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-
348 AM EDT Wed May 16 2018

.EARLY THIS MORNING...South winds 15 to 25 knots. A slight chance
of rain showers. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...Southwest winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon, then veering north late. A slight
chance of rain showers through early afternoon. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.THURSDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.SATURDAY...South winds 10 to 20 knots backing north. A chance of
rain showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ267-161600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
348 AM EDT Wed May 16 2018

.EARLY THIS MORNING...South winds 15 to 25 knots. Waves 1 to
3 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then becoming northwest 5 to 15 knots
late. Waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots veering north after
midnight, then veering northeast late. Waves building to 2 to
4 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing north in the
afternoon, then increasing to 10 to 20 knots late. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming
southeast 10 to 20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots. Waves subsiding
to 1 to 3 feet.
.SATURDAY...Southeast winds 10 to 20 knots backing north. A
chance of rain showers. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-161600-
MAFOR 1609/
Superior West 13520 11620 11220 11230 12130. Waves 1 to 3 feet
building to 2 to 4 feet.

Superior North Central 11520 11530 11620 11710 13820 11120.
Chance of rain showers this morning. Waves 1 to 3 feet today.
Waves 2 to 4 feet tonight.

Superior South Central 11530 11520 11620 11810 11110 11610 11710
11120. Waves 2 to 4 feet subsiding to 1 to 3 feet today. Waves 1
to 3 feet building to 2 to 4 feet tonight.

Superior East 11440 11530 11520 11600 12710 11810 11120. Waves 2
to 4 feet building to 4 to 7 feet, then subsiding to 1 to 2 feet
today. Waves 1 to 3 feet building to 2 to 4 feet tonight.

$$

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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