185
FZUS63 KMQT 020805
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
405 AM EDT Thu May 2 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...Ridging of 30.1 inches is currently centered over the
Upper Great Lakes and shifts east today as a 29.7 inch low
pressure tracks across the Upper Mississippi Valley. The low drags
29.8 inch troughing across Lake Superior tonight before tracking
northeast over Ontario and deepening to 29.6 inches on Friday. A
weak 30.0 inch trough pivots across the lake on Saturday ahead of
ridging that builds to 30.1 inches by Saturday evening; this
ridging persists through Sunday. Ridging shifts east early next
week as a broad 29.2 inch low pressure develops on the Northern
Plains on Monday.

LSZ162-021615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
405 AM EDT Thu May 2 2024 /305 AM CDT Thu May 2 2024/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Northeast winds 15 to 25 knots becoming east 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. Patchy fog. A chance of rain showers. Waves subsiding to
1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots. A slight chance
of rain showers after midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing east. Waves calm
to 2 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
A chance of rain showers. Waves building to 2 to 4 feet.

$$

LSZ263-021615-
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-
405 AM EDT Thu May 2 2024

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots late. A chance of rain showers. Waves building to 2 to
4 feet.
.TONIGHT...East winds 10 to 20 knots becoming southwest 5 to
15 knots late. Patchy fog. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.
.MONDAY...East winds 10 to 20 knots. A chance of rain showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.

$$

LSZ264-021615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
405 AM EDT Thu May 2 2024

.EARLY THIS MORNING...Northwest winds less than 10 knots. Waves
calm to 2 feet.
.TODAY...North winds less than 10 knots becoming east 5 to
15 knots in the afternoon. A chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast late.
Patchy fog. A chance of rain showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves subsiding to 2 to
4 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet.

$$

LSZ265-021615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
405 AM EDT Thu May 2 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots backing east in the afternoon,
then increasing to 10 to 20 knots late. A chance of rain showers
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming south 5 to 15 knots
late. Patchy fog. A chance of rain showers. Waves building to
2 to 4 feet.
.FRIDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing south late. Waves
subsiding to calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots becoming northeast
10 to 20 knots by mid afternoon. A chance of rain showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.
.MONDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 1 to
3 feet.

$$

LSZ266-021615-
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-
405 AM EDT Thu May 2 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots backing east in the afternoon,
then increasing to 10 to 20 knots late. A chance of rain showers
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
after midnight, then becoming southeast 10 to 20 knots late.
Patchy fog. Rain showers likely through midnight. A chance of
rain showers after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing southeast late.
A slight chance of rain showers through early afternoon. Waves
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming north 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.
.MONDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet.

$$

LSZ267-021615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
405 AM EDT Thu May 2 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.TODAY...West winds 5 to 15 knots backing east in the afternoon,
then backing northeast late. A chance of rain showers by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 15 to
25 knots after midnight. Patchy fog. Rain showers likely through
midnight. A chance of rain showers after midnight. Waves building
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 10 to 20 knots veering west in the
afternoon, then becoming east 5 to 15 knots late. A chance of
rain showers through early afternoon. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots backing northeast by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.
.MONDAY...Southeast winds 10 to 20 knots. Waves building to 1 to
3 feet.

$$

LSZ261-021615-
MAFOR 0209/
Superior West 12100 11110 11120 12136 11230 11310. Waves 1 to 2
feet building to 2 to 4 feet today. Waves 3 to 6 feet tonight.

Superior North Central 12700 11100 12210 11226 11220 11320. Waves
1 to 2 feet today building to 3 to 5 feet tonight.

Superior South Central 11600 11700 11200 11210 12216 11220 11320.
Waves 1 foot or less today building to 2 to 4 feet tonight.

Superior East 12600 11100 11200 11100 11216 11236 11336. Waves 1
to 3 feet today building to 3 to 6 feet tonight.

$$

EK

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

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