059
FZUS63 KMQT 090802
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 AM EDT Thu May 9 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 30.3 inch high over far northern Ontario will
weaken to a 30.0 inch ridge today extending from James Bay across
western Lake Superior. This ridge will remain nearly stationary
tonight. 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.

LSZ162-091615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 AM EDT Thu May 9 2024 /302 AM CDT Thu May 9 2024/

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...Northeast winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing southwest late.
Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots veering west late. A
chance of rain showers. A slight chance of thunderstorms by mid
afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming northwest 10 to
20 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...West winds 10 to 20 knots backing south by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering north. A chance
of rain showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.MONDAY...North winds 10 to 20 knots veering northeast. Waves
calm to 2 feet.

$$

LSZ263-091615-
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-
402 AM EDT Thu May 9 2024

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds less than 10 knots backing west after
midnight, then increasing to 5 to 15 knots late. Waves subsiding
to calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west late. 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. A slight chance of rain showers through midnight. Waves
subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing southwest by
mid afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.MONDAY...North winds 5 to 15 knots veering east. Waves calm to
2 feet.

$$

LSZ264-091615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 AM EDT Thu May 9 2024

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Northeast winds 5 to 15 knots backing northwest late.
Waves subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. A slight chance of rain
showers by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering northwest
after midnight. A slight chance of rain showers. Waves subsiding
to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots becoming northwest 5 to
15 knots. A chance of rain showers. Waves 1 to 3 feet.
.MONDAY...North winds 5 to 15 knots veering east. Waves subsiding
to calm to 2 feet.

$$

LSZ265-091615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 AM EDT Thu May 9 2024

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...Northeast winds 10 to 20 knots backing north in the
afternoon, then diminishing to 5 to 15 knots late. Waves
subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west late. Waves
subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing south in the
afternoon, then backing southeast late. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering west after
midnight. A slight chance of rain showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering west. A chance of
rain showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots veering southeast. Waves
calm to 2 feet.

$$

LSZ266-091615-
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-
402 AM EDT Thu May 9 2024

.EARLY THIS MORNING...Northeast winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Waves subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing west in the
afternoon, then backing east late. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering northwest
after midnight. A slight chance of rain showers. Waves calm to
2 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.

$$

LSZ267-091615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 AM EDT Thu May 9 2024

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Northeast winds 10 to 20 knots backing northwest late.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing northwest late. Waves
subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots veering northwest in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots backing north after
midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.

$$

LSZ261-091615-
MAFOR 0909/
Superior West 12130 12120 11110 11800 11700 11600. Waves 2 to 4
feet building to 3 to 5 feet, then subsiding to 2 to 4 feet
today. Waves 1 to 3 feet tonight.

Superior North Central 12120 11110 11810 14700. Waves 2 to 4 feet
subsiding to 1 to 3 feet today through tonight.

Superior South Central 12120 11110 12810 11710 12700. Waves 2 to
4 feet today. Waves 1 to 3 feet tonight.

Superior East 12120 11110 11810 11710 12810 11800. Waves 2 to 4
feet subsiding to 1 to 3 feet today. Waves 2 to 3 feet tonight.

$$

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