237
FZUS63 KMQT 150201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Tue Jul 14 2026

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...

Weak 30.0 inch ridging over Lake Superior this evening increases to
30.1 inches by Wednesday morning, persisting until Friday; expect
the ridge to retreat east towards the St. Lawrence Seaway and to
weaken with time on Friday. A low pressure of at least 29.8 inches
passing through the Northern Plains could impact the Upper Great
Lakes this weekend, although uncertainty remains high on the track
and strength of it. Nevertheless, weak 29.9 inch ridging does look
to return to Lake Superior on Sunday.



LSZ162-150800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Tue Jul 14 2026 /900 PM CDT Tue Jul 14 2026/

.REST OF TONIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A slight chance of showers by
midnight. Smoke. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots veering north in the
afternoon, then backing west late. Smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
late. Smoke. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Smoke through early afternoon. Waves
calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers and a slight
chance of thunderstorms after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ263-150800-
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-
1000 PM EDT Tue Jul 14 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots. A slight chance
of showers and thunderstorms by midnight. Smoke. Waves 1 to
3 feet subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Smoke. Waves calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots veering northeast by mid
afternoon. Smoke through early afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers and thunderstorms after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. Showers likely and a chance
of thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ264-150800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Tue Jul 14 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Smoke. Waves 1 to 3 feet subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Smoke. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing southwest by
mid afternoon. Smoke through early afternoon. Waves calm to
2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots backing southeast
after midnight. A slight chance of showers after midnight. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Showers likely through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots becoming west less than
10 knots. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-150800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Tue Jul 14 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Areas of smoke. Waves calm to
2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon, then backing west late. Smoke. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Smoke. Waves calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. Smoke through early afternoon. Waves
calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. A slight chance of showers after midnight. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. Showers and a chance of
thunderstorms. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ266-150800-
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-
1000 PM EDT Tue Jul 14 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Areas of smoke. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots late. Smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Smoke. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Smoke through early
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering southeast
after midnight. A slight chance of showers after midnight. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Showers and a chance of thunderstorms. Waves calm
to 2 feet.
.SATURDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ267-150800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Tue Jul 14 2026

.REST OF TONIGHT...West winds 5 to 15 knots. Areas of smoke.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Smoke. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Smoke through early afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots. Showers and a
chance of thunderstorms. Waves calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest. A chance of
showers. Waves building to 1 to 3 feet.

$$

LSZ261-150800-
MAFOR 1503/
Superior West 11710 14700 11600 11500 11600. Waves 2 feet or
less.

Superior North Central 11700 11610 12710 11700 11600 12610. Waves
1 to 3 feet.

Superior South Central 11600 12610 13710 12610. Waves 2 feet or
less.

Superior East 11700 11600 13700 13610. Waves 1 to 3 feet.

$$

WFO MQT

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

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