Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Last Update: 400 PM EST Sun Dec 7 2025

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Marquette, MI Local Forecast Office

30NM SE Grand Portage MN

Marine Zone Forecast

Late This Afternoon

Northwest winds 5 to 15 knots. Flurries. Waves 1 to 3 feet subsiding to calm to 2 feet.

Tonight

Northwest winds 5 to 15 knots becoming southwest 10 to 20 knots late. A chance of snow showers after midnight. Waves building to 1 to 3 feet.

Monday

Southwest winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet.

Monday Night

Southwest winds 15 to 25 knots veering west late. Snow showers. Waves 3 to 6 feet occasionally to 8 feet.

Tuesday

Northwest winds 15 to 25 knots becoming west 5 to 15 knots in the afternoon. A chance of snow showers. Waves subsiding to calm to 2 feet.

Tuesday Night

East winds 15 to 25 knots becoming northeast 20 to 30 knots after midnight. Snow showers likely in the evening, then a chance of snow showers after midnight. Freezing spray after midnight. Waves building to 6 to 9 feet occasionally to 11 feet.

Wednesday

North winds 20 to 30 knots becoming northwest 15 to 25 knots in the afternoon. Freezing spray in the morning. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

Wednesday Night

Northwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.

Thursday

Northwest winds 10 to 20 knots increasing to 15 to 25 knots. A chance of snow showers. Waves building to 3 to 5 feet occasionally to 7 feet.

Friday

Northwest winds 20 to 30 knots. Freezing spray. A chance of snow showers. Waves building to 5 to 8 feet occasionally to 10 feet.

note, wave height forecasts are for ice free areas.