564
FZUS63 KMQT 052050
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
350 PM EST Wed Feb 5 2025

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...30.6 inch ridging over Lake Superior this morning
moves into New England by this evening as it weakens to 30.4
inches. Behind this ridge, a 29.6 inch trough sweeps across Lake
Superior Thursday, while a 30.4 inch ridge builds over the
Northern Plains Friday. On Saturday, a 29.7 inch low passes
toward the southern end of the Great Lakes region, extending weak
troughing over the lake. Ridging reinvigorates to 30.3 inches by
Sunday as a 30.5 inch high digs into the Upper Midwest.

LSZ162-060500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
350 PM EST Wed Feb 5 2025 /250 PM CST Wed Feb 5 2025/

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY MORNING...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 15 to
25 knots by midnight, then increasing to 20 to 30 knots late. A
chance of snow in the evening, then snow after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West gales to 45 knots. Heavy freezing spray. A
chance of snow. Waves building to 9 to 12 feet occasionally to
15 feet.
.THURSDAY NIGHT...West gales to 45 knots becoming northwest gales
to 40 knots by midnight, then becoming west 20 to 30 knots late.
Heavy freezing spray. Waves subsiding to 3 to 6 feet occasionally
to 8 feet.
.FRIDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon. A chance of snow. Waves calm to
2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. Waves 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-060500-
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-
350 PM EST Wed Feb 5 2025

...STORM WARNING IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY AFTERNOON...

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 15 to
25 knots by midnight. A chance of snow in the evening, then snow
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.THURSDAY...Southwest gales to 40 knots becoming west gales to
45 knots by late morning, then increasing to storm force winds to
50 knots by mid afternoon. Freezing spray. Snow likely in the
morning. Scattered snow showers in the afternoon. Waves building
to 12 to 17 feet occasionally to 21 feet.
.THURSDAY NIGHT...West storm force winds to 50 knots becoming
northwest gales to 40 knots by midnight. Heavy freezing spray.
Isolated snow showers. Waves subsiding to 6 to 9 feet occasionally
to 11 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. Freezing spray. Isolated snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. A chance of snow. Waves
calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Waves building to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots increasing to 15 to 25 knots.
Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. Scattered
snow showers. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-060500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
350 PM EST Wed Feb 5 2025

...STORM WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 15 to 25 knots veering south by
midnight. A chance of snow. Waves building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...Southwest gales to 35 knots becoming westerly storm
force winds to 50 knots. Snow in the morning, then scattered snow
showers in the afternoon. Freezing spray in the afternoon. Waves
building to 12 to 17 feet occasionally to 21 feet.
.THURSDAY NIGHT...Northwest storm force winds to 50 knots,
becoming northwest gales to 45 knots by midnight. Isolated snow
showers in the evening. Heavy freezing spray. Waves subsiding to 8
to 11 feet occasionally to 14 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. Freezing spray. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Scattered
snow showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. Scattered
snow showers. Waves building to 3 to 5 feet occasionally to
7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-060500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
350 PM EST Wed Feb 5 2025

...STORM WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 15 to 25 knots. A chance of snow. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 15 to 25 knots becoming west gales to
45 knots by late morning, then increasing to storm force winds to
50 knots by mid afternoon. Heavy freezing spray. Snow likely.
Waves subsiding to 3 to 5 feet occasionally to 7 feet, then
building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...West storm force winds to 50 knots becoming
northwest gales to 45 knots by midnight. Heavy freezing spray.
Numerous snow showers in the evening. Isolated snow showers after
midnight. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...West winds 20 to 30 knots. Heavy freezing spray.
Isolated snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north in the
afternoon. A chance of snow. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Snow. Waves building to 2 to
4 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Scattered snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 15 to 25 knots. Scattered snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-060500-
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-
350 PM EST Wed Feb 5 2025

...STORM WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of snow after midnight. Waves building to
5 to 8 feet occasionally to 10 feet.
.THURSDAY...South winds 15 to 25 knots becoming west gales to
45 knots by late morning, then increasing to storm force winds to
50 knots by mid afternoon. Snow. Freezing spray in the afternoon.
Waves subsiding to 4 to 7 feet occasionally to 9 feet, then
building to 15 to 20 feet occasionally to 25 feet.
.THURSDAY NIGHT...Northwest storm force winds to 50 knots
diminishing to gales to 45 knots by midnight. Freezing spray.
Numerous snow showers in the evening. Scattered snow showers
after midnight. Waves subsiding to 12 to 17 feet occasionally to
21 feet.
.FRIDAY...West winds 20 to 30 knots. Freezing spray. Scattered
snow showers. Waves subsiding to 6 to 9 feet occasionally to
11 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north in the
afternoon. A chance of snow. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Snow. Waves building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Freezing spray. Scattered snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. Freezing
spray. Scattered snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-060500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
350 PM EST Wed Feb 5 2025

...STORM WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots. Snow likely after midnight. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...South winds 20 to 30 knots becoming west gales to
40 knots by late morning, then increasing to storm force winds to
50 knots by mid afternoon. Snow. Freezing spray in the afternoon.
Waves building to 15 to 20 feet occasionally to 25 feet.
.THURSDAY NIGHT...West storm force winds to 50 knots becoming
northwest gales to 45 knots by midnight. Freezing spray. Snow
showers. Waves building to 17 to 22 feet occasionally to 28 feet,
then subsiding to 12 to 17 feet occasionally to 21 feet.
.FRIDAY...Northwest gales to 35 knots becoming west 20 to
30 knots in the afternoon. Freezing spray. Scattered snow
showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. Freezing spray in the evening.
Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Southeast winds 10 to 20 knots. A chance of snow in
the afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots becoming north
15 to 25 knots after midnight. A chance of snow. Waves building
to 2 to 4 feet.
.SUNDAY...Northwest winds 15 to 25 knots backing west. Scattered
snow showers. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots increasing to 20 to 30 knots.
Freezing spray. Numerous snow showers. Waves building to 4 to
8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-060500-
MAFOR 0522/
Superior West...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...12320 11427 11437 11547 11650 11660 11672.
Waves 2 feet or less building to 3 to 5 feet tonight. Waves 4 to
7 feet building to 10 to 14 feet Thursday.

Superior North Central...STORM WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...11410 11330 11440 11447 11437 11547
11667 11670 19677. Waves 1 to 2 feet building to 4 to 7 feet
tonight. Waves 5 to 8 feet building to 12 to 16 feet Thursday.

Superior South Central...STORM WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...11320 12430 12437 11547 11661 19667
11671 19677. Waves 2 feet or less building to 3 to 5 feet
tonight. Waves 3 to 6 feet building to 11 to 15 feet Thursday.

Superior East...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...11510 12430 11437 12447 11557 11677. Waves 2
to 4 feet building to 3 to 6 feet tonight. Waves 4 to 7 feet
building to 12 to 16 feet Thursday.

$$

Thompson

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

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