776
FZUS63 KMQT 020140
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
940 PM EDT Mon Jul 1 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 30.2 inch high pressure currently centered over the
Great Lakes shifts east to the Northeast US tonight. Meanwhile, a
29.6 inch low will develop over the Northern Plains. This low
will deepen to 29.3 inches while lifting into northern Ontario by
Tuesday evening. An associated 29.7 inch trough will sweep across
Lake Superior Tuesday night and Wednesday morning as the low
continues northeast over Hudson Bay. In its wake, a 29.9 inch high
pressure ridge will shift east, reaching the western Great Lakes
on Thursday. A 29.7 inch low pressure organizing over the Plains
on Thursday will then track to the western Great Lakes region on
Friday. The low continues northeast, reaching Quebec by Saturday
evening.

LSZ162-020945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
940 PM EDT Mon Jul 1 2024 /840 PM CDT Mon Jul 1 2024/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 15 to
25 knots after midnight. A slight chance of showers through
midnight. A slight chance of thunderstorms. Showers after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots late. Showers likely and a slight chance of
thunderstorms through early afternoon. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering west late. A
slight chance of showers and thunderstorms through midnight.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ263-020945-
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-
940 PM EDT Mon Jul 1 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 10 to 20 knots. A chance of showers and a
slight chance of thunderstorms after midnight. Waves building to
2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots late. Showers likely and a slight chance of
thunderstorms through early afternoon, then a slight chance of
showers by mid afternoon. Waves 2 to 4 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight, then increasing to 10 to 20 knots late. A slight
chance of showers and thunderstorms. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...West winds 15 to 25 knots backing southwest by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing west. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-020945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
940 PM EDT Mon Jul 1 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A chance of showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. Showers likely through early afternoon, then a chance of
showers by mid afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. A slight chance of showers and thunderstorms. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves subsiding to
1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-020945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
940 PM EDT Mon Jul 1 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
A chance of showers after midnight. Waves building to 2 to
4 feet.
.TUESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots late. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. A chance of
showers. A slight chance of thunderstorms after midnight. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of showers after midnight. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-020945-
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-
940 PM EDT Mon Jul 1 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then increasing to 15 to 25 knots late. A slight chance
of showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon with a few gale force gusts to 35 knots
possible. A chance of showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. A chance of showers. A slight chance of
thunderstorms after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. A slight chance of
showers through early afternoon. Waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots veering northeast by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ267-020945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
940 PM EDT Mon Jul 1 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then backing southeast late. Waves calm
to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots late. A chance of showers. A slight chance of
thunderstorms after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.

$$
LSZ261-020945-
MAFOR 0203/
Superior West 12320 12326 13420 11410. Waves 2 to 3 feet.

Superior North Central 11430 11420 12330 11346 12440 11430. Waves
2 to 4 feet building to 3 to 5 feet overnight. Waves 3 to 6 feet
building to 5 to 8 feet Tuesday. Waves 4 to 7 feet Tuesday
evening.

Superior South Central 13320 11430 11436 11440 12430. Waves 2 to
3 feet overnight. Waves 2 to 4 feet building to 3 to 6 feet
Tuesday. Waves 3 to 6 feet Tuesday evening.

Superior East 12410 11320 12430 11436 12430. Waves 1 to 3 feet
overnight. Waves 2 to 3 feet building to 3 to 6 feet Tuesday.
Waves 3 to 6 feet Tuesday evening.

$$

Thompson

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

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