764
FZUS63 KMQT 060201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Tue May 5 2026

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 29.3 inch low over James Bay lifts into northern Quebec tonight as
30.2 inch ridging builds east of the Canadian Rockies. Wednesday,
the high pressure over the Canadian Prairie splits and moves to the
Canadian Four Corners and the Southern Plains at 30.0 inches and
30.2 inches respectively. By Thursday afternoon, Lake Superior is
projected to be between a 29.5 inch low over Hudson Bay, a 29.4 inch
low over the mouth of the St Lawrence River, a low of 29.7 inches
over the Black Hills, a high of 30.1 inches over Oklahoma, and a
weak 29.9 inch high over the Saskatchewan/Manitoba line. The Hudson
Bay and Black Hills lows work to pass a 29.8 inch trough over Lake
Superior Thursday night into Friday, with the lows consolidating
over Quebec by Saturday, leaving remnant 29.7 inch troughing over
Lake Superior. High pressure toi 30.1 inches builds back over the
Plains by Sunday.


LSZ162-060800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Tue May 5 2026 /901 PM CDT Tue May 5 2026/

.REST OF TONIGHT...Northwest winds 10 to 20 knots. Sprinkles and
flurries by midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing southwest late. Flurries
through early afternoon. Sprinkles. Waves building to 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-060800-
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-
1001 PM EDT Tue May 5 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots. Sprinkles and
flurries by midnight. Waves 2 to 4 feet subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. Flurries through early afternoon.
Sprinkles. A slight chance of snow showers by mid afternoon.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-060800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Tue May 5 2026

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
after midnight. Sprinkles and flurries by midnight. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. Sprinkles and flurries by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-060800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Tue May 5 2026

.REST OF TONIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing east by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.

$$

LSZ266-060800-
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-
1001 PM EDT Tue May 5 2026

.REST OF TONIGHT...West winds 10 to 20 knots. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. Waves
subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-060800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Tue May 5 2026

.REST OF TONIGHT...West winds 10 to 20 knots. Sprinkles and
flurries after midnight. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots veering northwest late.
Sprinkles and flurries through early afternoon. Waves 1 to
3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots backing southwest
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots becoming west 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of rain showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ261-060800-
MAFOR 0603/
Superior West 14710 11610 12520 11610. Waves 1 to 3 feet.

Superior North Central 12710 11720 11710 11610 12620 11610. Waves
2 to 4 feet overnight. Waves 1 to 3 feet Wednesday and Wednesday
evening.

Superior South Central 14610 13710 11610. Waves 1 to 3 feet.

Superior East 11620 11610 12710 12620 11710 11610. Waves 3 to 5
feet overnight. Waves 2 to 3 feet Wednesday and Wednesday
evening.

$$

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