538
FZUS63 KMQT 130746
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 AM EDT Mon May 13 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 tracking into James Bay is dragging
its associated 29.7 inch trough out of Lake Superior this morning.
In its wake, a 30.2 inch high pressure over western Hudson Bay
extends a 29.9 inch ridge into the Northern Plains and Upper
Mississippi Valley today. This ridge builds to 30.0 inches tonight
as it moves over Lake Superior; the ridging remains over Lake
Superior until Wednesday night. Meanwhile, a 29.7 inch trough
emerging over the Northern Plains on Tuesday weakens to 29.8
inches as it shifts to the Upper Mississippi Valley during
Wednesday night and Thursday. The trough deepens to 29.7 inches
over Lake Superior Thursday night and remains through Friday.

LSZ162-131600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 AM EDT Mon May 13 2024 /246 AM CDT Mon May 13 2024/

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots veering southeast in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. Waves
building to 1 to 3 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
rain showers through midnight, then rain showers likely after
midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ263-131600-
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-
346 AM EDT Mon May 13 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Haze. Waves
calm to 2 feet.
.TODAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then veering south late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing north after midnight,
then veering northeast late. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves building to 1 to
3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of rain showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.

$$

LSZ264-131600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 AM EDT Mon May 13 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon, then backing west late. Waves
subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots veering northeast in the
afternoon, then backing west late. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ265-131600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 AM EDT Mon May 13 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...North winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming north 5 to
15 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots veering southeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ266-131600-
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-
346 AM EDT Mon May 13 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...North winds 10 to 20 knots backing northwest in the
afternoon, then increasing to 15 to 25 knots late. Waves building
to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots veering
southeast after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.

$$

LSZ267-131600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 AM EDT Mon May 13 2024

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots late. Waves building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ261-131600-
MAFOR 1309/
Superior West 11820 11110 11210 12310 11200 12100. Waves 2 feet
or less.

Superior North Central 11830 12820 11710 12720 11820 11810. Waves
1 to 3 feet.

Superior South Central 11720 14820 11720 11820 11810. Waves 1 to
3 feet.

Superior East 11810 12720 13730 11820 11810. Waves 2 to 4 feet.

$$

TAP

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

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