424
FZUS63 KMQT 170757
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
357 AM EDT Wed Jul 17 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 30.1 inch high over Manitoba 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. This is quickly followed by an additional weak
trough at 30.0 inches that drops south across the Upper Great
Lakes Sunday night and Monday.

LSZ162-171600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
357 AM EDT Wed Jul 17 2024 /257 AM CDT Wed Jul 17 2024/

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves calm to 2
feet building to 1 to 3 feet.
.TODAY...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.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. 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...Northeast winds 5 to 15 knots backing west. Waves calm
to 2 feet.

$$

LSZ263-171600-
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-
357 AM EDT Wed Jul 17 2024

.EARLY THIS MORNING...North winds 15 to 25 knots. Isolated
showers. Waves 1 to 3 feet.
.TODAY...North winds 15 to 25 knots becoming northwest 10 to 20
knots in the afternoon, then 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.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots late. 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. Waves building to 2 to
4 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 veering east. Waves
calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest. Waves calm
to 2 feet.

$$

LSZ264-171600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
357 AM EDT Wed Jul 17 2024

.EARLY THIS MORNING...North winds 15 to 25 knots. Isolated
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...North winds 15 to 25 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.
.TONIGHT...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 late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots diminishing to less than
10 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-171600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
357 AM EDT Wed Jul 17 2024

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Isolated
showers. Waves 1 to 3 feet.
.TODAY...Northwest winds 15 to 25 knots veering north in the
afternoon, then becoming northwest 10 to 20 knots late. 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.
.TONIGHT...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 late. 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 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ266-171600-
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-
357 AM EDT Wed Jul 17 2024

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Isolated
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...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.
.TONIGHT...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. 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. 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 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ267-171600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
357 AM EDT Wed Jul 17 2024

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY...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.
.TONIGHT...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the 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 veering west 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...Northwest winds 5 to 15 knots backing west. Waves calm
to 2 feet.

$$

LSZ261-171600-
MAFOR 1709/
Superior West 12820 11720 13610 11600 11700. Waves 1 to 3 feet.

Superior North Central 11820 12830 11720 11710 12610 11700. Waves
1 to 5 feet.

Superior South Central 12720 11730 11830 11720 13710. Waves 1 to
5 feet.

Superior East 11710 11720 13730 11720 12710. Waves 2 to 5 feet.

$$

Jablonski

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

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