Prolonged Atmospheric River in the Northwest; Snow in the North-Central US
A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >
| NWS Forecast for: Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm (ANZ455) Issued by: National Weather Service Philadelphia, PA Last Update: 542 AM EST Tue Dec 9 2025 |  |
Today: N winds 10 to 15 kt, becoming NE 5 to 10 kt late this morning, then becoming E early this afternoon, becoming S late. Seas 4 to 5 ft. Wave detail: NE 5 ft at 8 seconds and N 1 foot at 4 seconds. Tonight: SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave detail: S 4 ft at 5 seconds and E 4 ft at 8 seconds. Wed: SW winds 20 to 25 kt, increasing to 25 to 30 kt in the afternoon. Seas 5 to 8 ft. Wave detail: S 8 ft at 6 seconds. Wed Night: W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. Wave detail: S 7 ft at 8 seconds and W 4 ft at 4 seconds. Thu: NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 5 seconds and S 4 ft at 8 seconds. Thu Night: NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: NW 4 ft at 5 seconds and S 1 foot at 8 seconds. Fri: W winds 10 to 15 kt. Seas 2 to 3 ft. Fri Night: W winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft. A chance of snow in the evening with vsby 1 to 3 nm. Sat: W winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Seas 3 to 5 ft. Sat Night: NW winds 15 to 20 kt. Seas 3 to 5 ft. A chance of rain and snow after midnight with vsby 1 to 3 nm. | |
| Zone Forecast: Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm (ANZ455) | |
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