359
FZUS63 KMQT 170144
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
944 PM EDT Tue Jul 16 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 broad 29.6 inch low is over east Ontario and
Quebec while a 30.0 inch high is over Manitoba. The high will
slowly build to 30.2 inches as it sags south into the the
Minnesota and Wisconsin area by Thursday morning. The high will
weaken to 30.1 inches as it slips south of Lake Superior Friday
while a weak 30.0 inch trough pushes over the lake into Saturday.
More broad 30.1 inch high pressure extends across much of the
Midwest and Upper Great Lakes Sunday.

LSZ162-170945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
944 PM EDT Tue Jul 16 2024 /844 PM CDT Tue Jul 16 2024/

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
after midnight, then increasing to 15 to 25 knots late. A slight
chance of thunderstorms by late evening. A slight chance of
showers. Waves calm to 2 feet building to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots backing west in the
afternoon, then diminishing to 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing northeast. Waves
calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots veering west. Waves calm to
2 feet.

$$

LSZ263-170945-
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-
944 PM EDT Tue Jul 16 2024

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. A slight chance of showers. Waves
calm to 2 feet building to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming west 5 to
15 knots late. A slight chance of showers through early
afternoon. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ264-170945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
944 PM EDT Tue Jul 16 2024

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. A slight chance of showers. Waves
calm to 2 feet building to 2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots late. A slight chance of showers through early
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
late. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ265-170945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
944 PM EDT Tue Jul 16 2024

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots late. A slight chance of showers after midnight.
Waves calm to 2 feet building to 1 to 3 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots veering north in the
afternoon. A slight chance of showers through early afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight, then veering northwest late. Waves subsiding to
calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ266-170945-
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-
944 PM EDT Tue Jul 16 2024

.REST OF TONIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A slight chance of showers after
midnight. Waves 1 to 3 feet building to 2 to 4 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots veering north in the
afternoon, then backing northwest late. A slight chance of
showers through early afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves
subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ267-170945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
944 PM EDT Tue Jul 16 2024

.REST OF TONIGHT...Northwest winds 10 to 20 knots. A slight
chance of showers after midnight. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of showers through
early afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.

$$
LSZ261-170945-
MAFOR 1703/
Superior West 11710 13820 11720 11600 12610. Waves 1 to 3 feet.

Superior North Central 11720 11830 11820 12830 11720 11710 11610.
Waves 1 to 3 feet overnight building to 2 to 5 feet Wednesday, then
subsiding to 1 to 3 feet Wednesday evening.

Superior South Central 11710 13720 11730 11830 11720 11710. Waves
1 to 3 feet overnight building to 3 to 5 feet Wednesday then subsiding
to 1 to 3 feet Wednesday evening.

Superior East 13710 14720 11720. Waves 2 to 3 feet overnight building
to 2 to 5 feet Wednesday and Wednesday evening.

$$

BW

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

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