182
FZUS63 KMQT 091950
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
350 PM EDT Tue Jul 9 2024

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 high pressure of 29.9 inches is placed over
Lake Superior this afternoon. The high builds to 30.0 inches on
Wednesday, and then to 30.1 inches by Thursday morning as its
associated ridging extends into the Upper Mississippi Valley. The
high pressure slides over the Upper Ohio Valley and Lower Great
Lakes Friday while a 29.8 inch trough moves east, extending from
northern Ontario to the Dakotas by evening. 29.9 inch troughing
pokes into Lake Superior by Saturday and Sunday.

LSZ162-100400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
350 PM EDT Tue Jul 9 2024 /250 PM CDT Tue Jul 9 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight. Patchy fog. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots. A slight chance of
showers and thunderstorms by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight, then backing west late. Waves
calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming north 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-100400-
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-
350 PM EDT Tue Jul 9 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming east less than
10 knots after midnight. Patchy fog. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots. Patchy fog. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots becoming
northwest less than 10 knots after midnight, then backing west
late. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering north. Waves calm
to 2 feet.

$$

LSZ264-100400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
350 PM EDT Tue Jul 9 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Southwest winds less than 10 knots backing east late.
Patchy fog. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots backing north late.
Patchy fog. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds less than 10 knots backing
northwest after midnight. Patchy fog through midnight. Waves calm
to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ265-100400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
350 PM EDT Tue Jul 9 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight, then backing northeast late. Patchy fog.
Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Patchy fog. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots backing northwest
after midnight, then diminishing to less than 10 knots late.
Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming southwest
5 to 15 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-100400-
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-
350 PM EDT Tue Jul 9 2024

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots. Patchy fog. Waves calm to
2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Patchy fog. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Patchy fog through
midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ267-100400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
350 PM EDT Tue Jul 9 2024

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Patchy fog. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Patchy fog. A slight chance of showers
by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering northwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ261-100400-
MAFOR 0921/
Superior West 11500 11300 12200 14100. Waves 1 foot or less.

Superior North Central 12600 11500 11400 11200 12100 11800. Waves
1 foot or less.

Superior South Central 11200 11300 12200 11100 13800. Waves 1
foot or less.

Superior East 13700 14800 11810. Waves 2 feet or less.

$$

BW

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes