Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Last Update: 402 PM EST Tue Dec 9 2025

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Philadelphia, PA Local Forecast Office

15NM E Lewes DE

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY EVENING...

Tonight

SW winds 10 to 15 kt, increasing to 15 to 20 kt late this evening and overnight. Seas 3 to 5 ft. Wave detail: SW 4 ft at 5 seconds and E 3 ft at 8 seconds.

Wed

SW winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 8 ft. Wave detail: S 8 ft at 6 seconds.

Wed Night

SW winds 20 to 25 kt, becoming W 25 to 30 kt after midnight. Seas 5 to 8 ft, subsiding to 4 to 6 ft after midnight. Wave detail: S 7 ft at 8 seconds, becoming S 5 ft at 8 seconds and W 4 ft at 4 seconds.

Thu

NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 5 seconds and S 3 ft at 8 seconds.

Thu Night

W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. Wave detail: NW 5 ft at 5 seconds and S 1 foot at 8 seconds.

Fri

W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Wave detail: NW 3 ft at 4 seconds and S 1 foot at 8 seconds.

Fri Night

W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain and snow in the evening. Vsby 1 to 3 nm.

Sat

W winds 15 to 20 kt. Seas 3 to 5 ft.

Sat Night

W winds 15 to 20 kt. Seas 3 to 4 ft. A chance of rain after midnight.