975
FZUS63 KMQT 041953
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
353 PM 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 30.0 inch
high over the mouth of the St. Lawrence seaway and a low of 29.3
inches over the southern Saskatchewan/Manitoba border this
afternoon. 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 as the low weakens to 29.4 inches over southern
James Bay. Weak ridging near 29.8 inches pushes into the Great
Lakes Basin Saturday and Sunday.


LSZ162-050400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
353 PM EDT Tue Jun 4 2024 /253 PM CDT Tue Jun 4 2024/

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

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Areas of
dense fog. A chance of showers and thunderstorms. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight, then veering west late. Patchy dense fog. A chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Patchy fog through early afternoon. A
chance of showers and thunderstorms. Waves building to 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
building to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding 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 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of showers. Waves
2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-050400-
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-
353 PM EDT Tue Jun 4 2024

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

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy dense
fog. A slight chance of showers and thunderstorms. Waves calm to
2 feet building to 1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots backing southeast after
midnight. Patchy fog. A chance of showers and thunderstorms.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots backing south late. Patchy
fog through early afternoon. Rain showers through early
afternoon. A chance of thunderstorms. A slight chance of rain
showers by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. 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 increasing to 20 to
30 knots by mid afternoon. A chance of showers. 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. A chance of showers. Waves
2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of showers. Waves 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves subsiding to calm to 2 feet.

$$

LSZ264-050400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
353 PM EDT Tue Jun 4 2024

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

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy dense
fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to
15 knots after midnight, then backing southeast late. Patchy
dense fog. A chance of showers and thunderstorms. Waves building
to 2 to 4 feet.
.WEDNESDAY...South winds 10 to 20 knots veering west in the
afternoon, then backing southwest late. Patchy fog. Rain showers
through early afternoon. A chance of thunderstorms. A 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. Patchy fog. A 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. A chance of showers. 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...Northwest winds 10 to 20 knots backing west by mid
afternoon. A chance of showers. Waves 2 to 4 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. A chance of showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of showers. Waves 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves 1 to 3 feet.

$$

LSZ265-050400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
353 PM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots backing southeast after
midnight. Patchy fog after midnight. A chance of showers and a
slight chance of thunderstorms after midnight. Waves 1 to 3 feet.
.WEDNESDAY...South winds 10 to 20 knots veering west in the
afternoon, then backing south late. Patchy fog. Showers through
early afternoon. A slight 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 slight chance of thunderstorms through
midnight. A chance of showers. 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 1 to
3 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. A chance of showers.
Waves 1 to 3 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of showers. Waves
1 to 3 feet.
.FRIDAY NIGHT...West winds 10 to 20 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. A chance of showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-050400-
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-
353 PM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Patchy
fog. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then backing southeast late. Patchy fog.
A slight chance of showers and thunderstorms after midnight.
Waves building to 2 to 4 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. Patchy fog. Showers through early afternoon. A slight
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 late.
Patchy fog. 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 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. 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 subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots. A chance of rain
showers. Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.

$$

LSZ267-050400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
353 PM EDT Tue Jun 4 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Patchy fog.
Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots backing southeast after
midnight, then increasing to 15 to 25 knots late. 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. Patchy fog. A
chance of showers and thunderstorms. Waves subsiding to 1 to
3 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering west late.
Patchy fog. A slight chance of thunderstorms through midnight. A
chance of showers. Waves subsiding to 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. A chance of showers.
Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. A chance of showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ261-050400-
MAFOR 0421/
Superior West 11220 19224 11210 19214 11200 11406 12616 12520. A
chance of thunderstorms tonight and Wednesday morning. Waves 1 to
3 feet.

Superior North Central 11310 19314 11320 19324 11420 12310 11426
11526 11620. A chance of thunderstorms Wednesday morning. Waves 2
to 4 feet.

Superior South Central 11320 12420 12320 11426 11526 11620. Waves
1 to 3 feet.

Superior East 11310 14320 11320 11326 11526. Waves 1 to 4 feet
tonight and Wednesday.

$$

BW

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

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