691
FZUS63 KMQT 041349
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
949 AM EDT Tue Jun 4 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...Lake Superior is currently set between a 30.1 inch
high over the mouth of the St. Lawrence seaway and a low of 29.3
inches over southern Saskatchewan this morning. The cold front of
the low will extend troughing of 29.5 inches across the lake
tonight into Wednesday before a another 29.3 inch low moves over
the lake late Wednesday into Thursday morning. The troughing over
Lake Superior weakens to 29.6 inches by Friday before parking over
the Upper Great Lakes for the rest of this upcoming weekend.

LSZ162-042200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
949 AM EDT Tue Jun 4 2024 /849 AM CDT Tue Jun 4 2024/

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 PM EDT /10 PM CDT/ THIS
EVENING...

.REST OF TODAY...Northeast winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon. Patchy dense fog. A chance of
showers and thunderstorms by mid afternoon. Waves calm to 2 feet
building to 2 to 4 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing west after
midnight. Patchy fog. Rain showers and a chance of thunderstorms.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering west late. A chance of
rain showers. A slight chance of thunderstorms by mid afternoon.
Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of thunderstorms through
midnight. A slight chance of showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ263-042200-
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-
949 AM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

.REST OF TODAY...East winds 5 to 15 knots backing northeast in
the afternoon, then veering east late. Patchy dense fog. A chance
of showers and a slight chance of thunderstorms by mid afternoon.
Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then veering west late. Patchy fog. A chance of rain
showers through midnight. A chance of thunderstorms. Rain showers
after midnight. Waves 1 to 3 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Patchy fog through early afternoon. Rain showers
through early afternoon. A slight chance of thunderstorms. A
chance of rain showers by mid afternoon. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves 1 to 3 feet.

$$

LSZ264-042200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
949 AM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon, then increasing to 10 to 20 knots late. Patchy
dense fog. A slight chance of showers by mid afternoon. Waves
calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south late.
Patchy fog. A chance of rain showers through midnight. A chance
of thunderstorms. Rain showers likely after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west in the
afternoon, then backing southwest late. Patchy fog through early
afternoon. Rain showers and a slight chance of thunderstorms
through early afternoon, then a slight chance of rain showers by
mid afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. A slight chance of showers. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. A chance of showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves 1 to 3 feet.

$$

LSZ265-042200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
949 AM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southeast winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon. Patchy dense fog. Waves calm to
2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots late. Patchy fog. A chance of showers and thunderstorms.
Waves building to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots backing south late. Patchy
fog through early afternoon. Showers through early afternoon. A
chance of thunderstorms. A chance of showers by mid afternoon.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers and a slight chance of
thunderstorms through midnight. Waves building to 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of showers. Waves subsiding to
1 to 3 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-042200-
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-
949 AM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon, then increasing to 10 to 20 knots
late. Patchy dense fog. Waves calm to 2 feet building to 1 to 3
feet.
.TONIGHT...Southeast winds 15 to 25 knots becoming south 10 to
20 knots late. Patchy fog. A chance of showers and a slight
chance of thunderstorms after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...South winds 10 to 20 knots veering west in the
afternoon, then backing south late. Showers through early
afternoon. A chance of thunderstorms. A chance of showers by mid
afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. A slight chance of thunderstorms through midnight. A
chance of showers. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. A chance of showers.
Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.

$$

LSZ267-042200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
949 AM EDT Tue Jun 4 2024

.REST OF TODAY...Southeast winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...Southeast winds 15 to 25 knots. Patchy fog. A slight
chance of showers after midnight. Waves building to 2 to 4 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots veering south in the
afternoon, then becoming west 10 to 20 knots late. Showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. A slight chance of thunderstorms through midnight. A
chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of showers. Waves subsiding to 1 to 3 feet.

$$
LSZ261-042200-
MAFOR 0415/
Superior West 11110 11120 12220 11316 11516 11616 11510. A chance
of thunderstorms tonight. Waves 1 to 4 feet.

Superior North Central 11300 11210 11223 13320 11426 11526. A
chance of thunderstorms Wednesday morning. Waves 1 to 2 feet this
afternoon. Waves 2 to 5 feet tonight and Wednesday morning.

Superior South Central 12310 14320 11420 11416. A chance of
thunderstorms Wednesday morning. Waves 1 to 4 feet.

Superior East 13310 14320 11320. A chance of showers Wednesday
morning. Waves 1 to 4 feet.

$$

GS

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

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