Station List

National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 031347
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
947 AM EDT Fri May 3 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 29.6 inch low pressure near Lake Winnipeg this morning drags a 29.8 inch trough with across Lake Superior the rest of today into tonight. A weak 30.0 inch trough pivots across the lake late tonight ahead of ridging that builds to 30.1 inches by Saturday morning. A weak 29.9 inch trough moves into the Upper Great Lakes Saturday evening before ridging at 30.1 inches returns by Sunday. Ridging shifts east early next week as a broad 29.2 inch low pressure develops on the Northern Plains on Monday. A strong pressure gradient over western Lake Superior begins to setup Tuesday morning as a deepening 29.0 inch low low pushes eastward against 30.0 inch ridging over far northern Ontario.

LSZ162-032200
Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM
947 AM EDT Fri May 3 2024 /847 AM CDT Fri May 3 2024/

REST OF TODAY
Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet.

TONIGHT
Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet.

SATURDAY
West winds 5 to 15 knots veering northwest in the afternoon, then backing southwest late. A chance of rain showers. Waves calm to 2 feet.

SATURDAY NIGHT
West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet.

SUNDAY
West winds 10 to 20 knots backing southwest by mid afternoon. Waves building to 1 to 3 feet.

SUNDAY NIGHT
South winds 5 to 15 knots backing northeast after midnight. Waves subsiding to calm to 2 feet.

MONDAY
East winds 10 to 20 knots increasing to 20 to 30 knots. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet.

TUESDAY
East winds 20 to 30 knots becoming northeast 15 to 25 knots. Rain showers. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.

LSZ263-032200
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
947 AM EDT Fri May 3 2024

REST OF TODAY
Southwest winds 10 to 20 knots increasing to 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. Patchy fog by late morning. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

TONIGHT
Southwest winds 10 to 20 knots diminishing to 5 to 15 knots late. A slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet.

SATURDAY
West winds less than 10 knots becoming north 5 to 15 knots in the afternoon, then backing northwest late. A chance of rain showers. Waves calm to 2 feet.

SATURDAY NIGHT
West winds 5 to 15 knots. Waves building to 1 to 3 feet.

SUNDAY
West winds 5 to 15 knots backing southwest by mid afternoon. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.

SUNDAY NIGHT
Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet.

MONDAY
East winds 10 to 20 knots. A chance of rain showers. Waves building to 2 to 4 feet.

TUESDAY
East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet.

LSZ264-032200
Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border
947 AM EDT Fri May 3 2024

REST OF TODAY
Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Patchy fog by late morning. Waves 2 to 4 feet.

TONIGHT
Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.

SATURDAY
Southwest winds less than 10 knots becoming southeast 5 to 15 knots in the afternoon, then backing north late. A chance of rain showers. Waves subsiding to calm to 2 feet.

SATURDAY NIGHT
West winds 5 to 15 knots veering northwest after midnight. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet.

SUNDAY
West winds 5 to 15 knots backing southwest by mid afternoon. Waves 1 to 3 feet.

SUNDAY NIGHT
Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet.

MONDAY
East winds 5 to 15 knots increasing to 10 to 20 knots. Waves building to 2 to 4 feet.

TUESDAY
East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet.

LSZ265-032200
Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore
947 AM EDT Fri May 3 2024

REST OF TODAY
West winds 5 to 15 knots backing south in the afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet.

TONIGHT
South winds 5 to 15 knots veering southwest after midnight, then backing south late. Waves calm to 2 feet.

SATURDAY
South winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. A chance of showers. Waves calm to 2 feet.

SATURDAY NIGHT
Northwest winds 10 to 20 knots backing west after midnight. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet.

SUNDAY
West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves subsiding to calm to 2 feet.

SUNDAY NIGHT
South winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
East winds 5 to 15 knots becoming southeast 15 to 25 knots. Waves building to 1 to 3 feet.

TUESDAY
East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

LSZ266-032200
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
947 AM EDT Fri May 3 2024

REST OF TODAY
Southwest winds 10 to 20 knots backing southeast late. Waves 2 to 4 feet subsiding to 1 to 3 feet.

TONIGHT
South winds 5 to 15 knots increasing to 10 to 20 knots after midnight, then diminishing to 5 to 15 knots late. Waves 1 to 3 feet.

SATURDAY
South winds 5 to 15 knots becoming southeast 10 to 20 knots in the afternoon, then backing east late. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.

SATURDAY NIGHT
Northwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.

SUNDAY
Northwest winds 10 to 20 knots becoming west 5 to 15 knots by mid afternoon. Waves subsiding to 1 to 3 feet.

SUNDAY NIGHT
Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet.

MONDAY
East winds 5 to 15 knots becoming southeast 10 to 20 knots. Waves building to 2 to 4 feet.

TUESDAY
East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

LSZ267-032200
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
947 AM EDT Fri May 3 2024

REST OF TODAY
Southwest winds 10 to 20 knots becoming west 5 to 15 knots in the afternoon, then backing southeast late. A slight chance of showers and thunderstorms by late morning. Waves 1 to 3 feet subsiding to calm to 2 feet.

TONIGHT
South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet.

SATURDAY
Southeast winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves building to 1 to 3 feet.

SATURDAY NIGHT
South winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Rain showers likely through midnight, then a slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.

SUNDAY
West winds 10 to 20 knots. Waves 2 to 4 feet.

SUNDAY NIGHT
West winds 10 to 20 knots backing south after midnight. Waves subsiding to calm to 2 feet.

MONDAY
East winds 10 to 20 knots veering southeast. Waves building to 1 to 3 feet.

TUESDAY
Southeast winds 15 to 25 knots. A chance of showers, then showers likely. Waves building to 2 to 4 feet.

LSZ261-032200
MAFOR 0315/ Superior West 11530 11540 11530 12520 11510 11500 11600. A chance of showers Saturday morning. Waves 2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight. Waves 1 to 2 feet Saturday morning.

Superior North Central 11520 11530 13520 11510 12500. Waves 3 to 5 feet subsiding to 2 to 4 feet this afternoon. Waves 2 to 4 feet tonight. Waves 1 to 3 feet Saturday morning.

Superior South Central 11520 11410 11310 12400 11500 12400. Waves 1 to 3 feet this afternoon. Waves 1 foot or less tonight and Saturday morning.

Superior East 11610 11400 11310 11300 12410 11400 11410. Waves 1 to 3 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