895
FZUS63 KMQT 081406
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1006 AM EDT Wed May 8 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 29.5 inch low pressure over Georgian Bay late this
morning will track east, reaching New England this evening.
Meanwhile, as a 30.3 inch high pressure over Hudson Bay this
afternoon builds into far northern Ontario tonight, a 29.5 inch low
pressure over Oklahoma will move to the Ohio Valley. During
Thursday, the high over far northern Ontario will weaken to a 30.0
inch ridge extending from James Bay across western Lake Superior.
This ridge will remain nearly stationary on Thursday night. As the
ridge weakens to 29.8 inches while drifting east on Friday, a 29.7
inch trough will drop southeast, crossing Lake Superior during
Friday night. In its wake, a 29.9 inch ridge will shift southeast,
crossing Lake Superior late Saturday afternoon and Saturday night.
On Sunday, a 29.5 inch low pressure will track east to southern
Hudson Bay. This low will push an associated 29.7 inch trough across
Lake Superior during Sunday afternoon and Sunday night. In its wake,
30.1 inch high pressure will build into northern Ontario on Monday.

LSZ162-082215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1006 AM EDT Wed May 8 2024 /906 AM CDT Wed May 8 2024/

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
15 to 25 knots. Isolated rain showers through late morning. Waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 10 to 20 knots increasing to 15 to
25 knots late. Waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Rain showers likely by
mid afternoon. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing southwest.
Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering northwest. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ263-082215-
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-
1006 AM EDT Wed May 8 2024

.REST OF TODAY...Northeast winds 15 to 25 knots veering east
late. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast winds 15 to 25 knots. Waves 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing north late. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.

$$

LSZ264-082215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1006 AM EDT Wed May 8 2024

.REST OF TODAY...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots in the afternoon. Waves 3 to 6 feet occasionally
to 8 feet subsiding to 1 to 3 feet.
.TONIGHT...Northeast winds 15 to 25 knots increasing to 20 to 30
knots in the evening, then diminishing to 15 to 25 knots late.
Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing northwest
late. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet.

$$

LSZ265-082215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1006 AM EDT Wed May 8 2024

.REST OF TODAY...North winds 10 to 20 knots. Waves 1 to 3 feet
building to 2 to 4 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast after
midnight, then increasing to 10 to 20 knots late. Waves subsiding
to 1 to 3 feet, then building to 3 to 5 feet occasionally to
7 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ266-082215-
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-
1006 AM EDT Wed May 8 2024

.REST OF TODAY...Northeast winds 15 to 25 knots becoming north
10 to 20 knots in the afternoon. Isolated rain showers through
late morning. Waves 3 to 6 feet occasionally to 8 feet subsiding
to 2 to 4 feet.
.TONIGHT...North winds 15 to 25 knots veering northeast after
midnight, then diminishing to 10 to 20 knots late. Waves building
to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet.

$$

LSZ267-082215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1006 AM EDT Wed May 8 2024

.REST OF TODAY...Northeast winds 15 to 25 knots becoming north
10 to 20 knots in the afternoon. Isolated rain showers through
late morning. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight. Waves building to 2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$
LSZ261-082215-
MAFOR 0815/
Superior West 11130 11240 11230 12120 13130. Waves 2 to 6 feet.

Superior North Central 11130 12120 11130 11140 13130. Waves 2 to
6 feet.

Superior South Central 14810 11110 11120 12110. Waves 2 to 4
feet.

Superior East 11130 13820 14120. Waves 1 to 5 feet.

$$

Rolfson

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

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