620
FZUS63 KMQT 190751
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 AM EDT Wed Jun 19 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 broad 29.6 inch low is pushing farther into James
Bay this morning as it pulls a 29.7 inch trough over Lake
Superior. As the low lifts northeast, high pressure to 30.4 inches
builds over Lake Superior for Thursday and Friday. By Friday
night, the high weakens to 30.2 inches and slides east. Low
pressure of at least 29.7 inches lifts off of the Colorado Rockies
Friday night and brings troughing of around 29.6 inches over Lake
Superior Saturday as the low moves into Canada. The troughing
over Lake Superior deepens to at least 29.5 inches by Sunday as
the low strengthens over northern Ontario.


LSZ162-191600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 AM EDT Wed Jun 19 2024 /251 AM CDT Wed Jun 19 2024/

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT /7 AM CDT/ THIS
MORNING...

.EARLY THIS MORNING...West winds 15 to 25 knots. Patchy dense
fog. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing southwest late. Waves subsiding to
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Waves
calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then veering east late. Waves calm to
2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance
of showers after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers through early
afternoon. Showers likely by mid afternoon. Waves building to
1 to 3 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots. Showers and a
chance of thunderstorms. Waves 1 to 3 feet.
.SATURDAY...Northeast winds 10 to 20 knots backing west. Showers
likely. A chance of thunderstorms. A chance of showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-191600-
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-
351 AM EDT Wed Jun 19 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Patchy
dense fog. Isolated showers and thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
late. Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Waves
subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east late.
Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Showers and a chance of
thunderstorms. Waves calm to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots becoming west 5 to
15 knots. Showers likely. A chance of thunderstorms. A chance of
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ264-191600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 AM EDT Wed Jun 19 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.EARLY THIS MORNING...South winds 15 to 25 knots. Patchy dense
fog. Scattered showers and thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
late. Patchy dense fog through early afternoon. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 2 to
4 feet.
.TONIGHT...West winds 5 to 15 knots becoming northwest less than
10 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY...North winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then veering south late. Waves calm to
2 feet.
.THURSDAY NIGHT...East winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers
through midnight. A chance of thunderstorms. Showers likely after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots becoming northwest 5 to
15 knots. Showers likely. A chance of thunderstorms. A chance of
showers. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-191600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 AM EDT Wed Jun 19 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Isolated
showers and thunderstorms. Waves 1 to 3 feet.
.TODAY...West winds 15 to 25 knots. Isolated showers and
thunderstorms through early afternoon. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west after
midnight, then veering northwest late. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering east late. Waves
calm to 2 feet.
.THURSDAY NIGHT...East winds less than 10 knots. A slight chance
of showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Showers and a chance of thunderstorms. Waves calm to
2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering northwest.
Showers. A chance of thunderstorms. A chance of showers. Waves
calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-191600-
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-
351 AM EDT Wed Jun 19 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Patchy fog.
Isolated showers and thunderstorms. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet.
.TODAY...West winds 15 to 25 knots. Isolated showers and
thunderstorms through early afternoon. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots diminishing to less
than 10 knots after midnight. A slight chance of showers. Waves
calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. A chance of showers through midnight. A chance of
thunderstorms. Showers after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering northwest.
Showers. A chance of thunderstorms. A chance of showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.

$$

LSZ267-191600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 AM EDT Wed Jun 19 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Isolated
showers and thunderstorms. Waves 2 to 4 feet.
.TODAY...Southwest winds 15 to 25 knots veering west in the
afternoon, then becoming northwest 10 to 20 knots late. Scattered
showers and thunderstorms. Waves 2 to 4 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. A chance of showers through midnight,
then showers after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering northwest.
Showers and a chance of thunderstorms. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet.

$$

LSZ261-191600-
MAFOR 1909/
Superior West 13630 11620 12510 11600 11800. Waves 3 to 6 feet
subsiding to 1 to 3 feet today and eventually to 1 foot or less
tonight.

Superior North Central 11430 19434 11540 11640 11630 11620 11610
11600 11700. Waves 3 to 6 feet building to 4 to 7 feet, then
subsiding to 3 to 6 feet today. Waves 3 to 5 feet subsiding to 1
to 3 feet tonight.

Superior South Central 11520 12630 11620 11720 11710 11600 11700.
Waves 1 to 3 feet building to 2 to 4 feet today. Waves 1 to 3
feet subsiding to 1 foot or less tonight.

Superior East 11430 19439 11530 19539 12630 11720 11710 12700.
Waves 3 to 5 feet today subsiding to 2 to 3 feet tonight.


$$

WFO MQT

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