Great Lakes Forecast
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FZUS63 KMQT 152002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 PM EDT Wed Aug 15 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 30.0 inch ridge remains over the Upper Great
Lakes tonight. A 30.2 inch ridge shifts into Northwestern Ontario on
Friday morning while a 29.9 inch low passes across Lower Michigan on
Friday morning before tracking into New England late Friday into
Saturday morning. The 30.2 inch ridge will then slowly move eastward
over James Bay throughout Friday into Saturday as our next trough
at 29.9 inches moves across Lake Superior on Sunday afternoon. A
weak 30.0 inch ridge moves into the Upper Great Lakes on Monday.

LSZ162-160415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 PM EDT Wed Aug 15 2018 /302 PM CDT Wed Aug 15 2018/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...Northeast winds 5 to 15 knots diminishing to less than
10 knots late. Patchy fog after midnight. Waves subsiding to calm
to 2 feet.
.THURSDAY...Northeast winds less than 10 knots veering south in
the afternoon, then veering southwest late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds less than 10 knots veering west
late. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds less than 10 knots. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing northeast. A
chance of showers. Waves building to 1 to 3 feet.
.MONDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ263-160415-
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-
402 PM EDT Wed Aug 15 2018

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast less than
10 knots late. Patchy fog after midnight. Waves subsiding to calm
to 2 feet.
.THURSDAY...Northeast winds less than 10 knots veering south in
the afternoon, then becoming southwest 5 to 15 knots late. Waves
calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight, then becoming west 5 to
15 knots late. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southeast winds less than 10 knots veering south by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing northeast. A
chance of showers. Waves building to 1 to 3 feet.
.MONDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ264-160415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 PM EDT Wed Aug 15 2018

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight, then veering north late. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing northeast. A
chance of showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ265-160415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 PM EDT Wed Aug 15 2018

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots becoming south
less than 10 knots after midnight, then becoming west 5 to
15 knots late. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots. Showers likely, then a chance of showers. Waves calm to
2 feet.

$$

LSZ266-160415-
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-
402 PM EDT Wed Aug 15 2018

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast late.
Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering southwest
after midnight, then veering northwest late. Waves calm to
2 feet.
.FRIDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast. A chance
of showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-160415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 PM EDT Wed Aug 15 2018

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering northeast late. Waves calm
to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...North winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast. A chance
of showers. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ261-160415-
MAFOR 1521/
Superior West 11210 11200 14100 11200 11500. Waves 1 to 3 feet
tonight. Waves 1 foot or less Thursday.

Superior North Central 11200 15300 11400. Waves 2 feet or less.

Superior South Central 11210 12200 11300 14200. Waves 2 feet or
less.

Superior East 13800 11100 13200 11100. Waves 2 feet or less.

$$

JSS

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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