Great Lakes Forecast
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FZUS63 KMQT 140154
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
954 PM EDT Sun May 13 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 weak 29.9 inch ridge will remain over the Upper
Great Lakes through early next week, briefly strengthening to 30.1
inches on Tuesday. A weak trough averaging 29.9 inches will then
slowly move into the western Great Lakes early Wednesday.
A high pressure system of 30.2 inches will shift into south
central Canada on Thursday.

LSZ162-141000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
954 PM EDT Sun May 13 2018 /854 PM CDT Sun May 13 2018/

.REST OF TONIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves 2 to 4 feet subsiding to calm to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of rain showers through
midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.

$$

LSZ263-141000-
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-
954 PM EDT Sun May 13 2018

.REST OF TONIGHT...Southwest winds 10 to 20 knots becoming west
5 to 15 knots late. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming south less than
10 knots in the afternoon, then increasing to 5 to 15 knots late.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots veering northeast after
midnight, then becoming north 10 to 20 knots late. Waves calm to 2
feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 5 to 15 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots backing northeast. A chance of
rain showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

$$

LSZ264-141000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
954 PM EDT Sun May 13 2018

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

$$

LSZ265-141000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
954 PM EDT Sun May 13 2018

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
after midnight, then becoming west 10 to 20 knots late. Waves
calm to 2 feet.
.MONDAY...West winds 10 to 20 knots becoming north 5 to 15 knots
in the afternoon, then veering east late. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northwest after
midnight, then becoming north 10 to 20 knots late. Waves calm to 2
feet.
.TUESDAY...North winds 10 to 20 knots becoming east 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming
southwest 15 to 25 knots after midnight. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots veering north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots becoming east
10 to 20 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ266-141000-
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-
954 PM EDT Sun May 13 2018

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY...West winds 5 to 15 knots veering northwest in the
afternoon, then backing west late. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight, then veering north late. Waves
calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots veering north by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. Waves
subsiding to 1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots veering southeast. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.

$$

LSZ267-141000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
954 PM EDT Sun May 13 2018

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet building to 1 to 3 feet.
.MONDAY...Southwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots veering north after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering northwest by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming southeast
5 to 15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots veering southeast. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$
LSZ261-141000-
MAFOR 1403/
Superior West 12520 11510 11610 11600 12400 11510. Waves 1 to 4
feet.

Superior North Central 12530 11620 11610 11710 11700 12510. Waves
1 to 4 feet.

Superior South Central 11510 11520 11620 11610 11710 11800 11200
11400. Waves 2 feet or less.

Superior East 13520 11610 13600 11500. Waves 1 to 3 feet.

$$

Borchardt

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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