Great Lakes Forecast
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FZUS63 KMQT 271343
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 AM EDT Thu Jul 27 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...A 30.0 inch ridge of high pressure will build into
the upper Great Lakes region into Friday, while an exiting trough
of 29.8 inch trough pushes down across the Ohio River Valley. High
pressure of 30.1 inches will linger across the upper Great Lakes
through the weekend. A low pressure trough of 29.9 inches will
move across Lake Superior late Monday into Tuesday.

LSZ162-272100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 AM EDT Thu Jul 27 2017 /843 AM CDT Thu Jul 27 2017/

.REST OF TODAY...Northeast winds 5 to 15 knots veering east in
the afternoon, then backing northeast late. A slight chance of
showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming north less than
10 knots after midnight, then backing northwest late. Waves calm
to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east late. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds less than 10 knots backing northeast
after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. 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. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-272100-
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-
943 AM EDT Thu Jul 27 2017

.REST OF TODAY...Northeast winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then veering east late. Waves
calm to 2 feet.
.TONIGHT...Northeast winds less than 10 knots backing northwest
after midnight, then veering north late. Waves calm to 2 feet.
.FRIDAY...Northeast winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY NIGHT...East winds less than 10 knots veering south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots 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. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south. Waves
building to 1 to 3 feet.

$$

LSZ264-272100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 AM EDT Thu Jul 27 2017

.REST OF TODAY...Northeast winds less than 10 knots veering east
late. Waves calm to 2 feet.
.TONIGHT...West winds less than 10 knots becoming northwest 5 to
15 knots after midnight, then veering east late. Waves calm to
2 feet.
.FRIDAY...East winds less than 10 knots veering southeast late.
Waves calm to 2 feet.
.FRIDAY NIGHT...South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots becoming south
5 to 15 knots 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. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south. Waves building
to 1 to 3 feet.

$$

LSZ265-272100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 AM EDT Thu Jul 27 2017

.REST OF TODAY...Northeast winds 5 to 15 knots backing north in
the afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south. Waves building
to 1 to 3 feet.

$$

LSZ266-272100-
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-
943 AM EDT Thu Jul 27 2017

.REST OF TODAY...North winds 5 to 15 knots backing northwest
late. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then veering northeast late. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots backing north late. Waves calm
to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south. Waves building
to 1 to 3 feet.

$$

LSZ267-272100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 AM EDT Thu Jul 27 2017

.REST OF TODAY...North winds 5 to 15 knots becoming northwest
10 to 20 knots in the afternoon. Patchy fog by late morning.
Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots late. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.

$$
LSZ261-272100-
MAFOR 2715/
Superior West 11100 11200 11100 12800 11700 11800 11100. Waves 1
foot or less.

Superior North Central 12800 11500 11600 11700 11800 12200. Waves
1 foot or less.

Superior South Central 14800 13810 11100. Waves 2 feet or less.

Superior East 11810 11710 11720 12810 13110. Waves 1 to 2 feet.

$$

MZ

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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