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 >

Current conditions at

STONYFORD (SYWC1)

Lat: 39.35523°NLon: 122.65831°WElev: 1540.0ft.

NA

37°F

3°C

Humidity 94%
Wind Speed NNE 1 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 09 Dec 08:26 PM PST
Extended Forecast for

18 Miles SSE Alder Springs CA

  • Tonight

    Tonight: Widespread haze after midnight. Clear, with a low around 48. Northwest wind around 6 mph.

    Low: 48 °F

    Clear then
    Haze

  • Wednesday

    Wednesday: Widespread haze before noon. Sunny, with a high near 63. Northwest wind around 5 mph becoming calm  in the morning.

    High: 63 °F

    Haze then
    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48. West northwest wind around 6 mph.

    Low: 48 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 62. West northwest wind around 5 mph becoming calm  in the morning.

    High: 62 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. Northwest wind around 5 mph.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Widespread haze after midnight. Clear, with a low around 48. Northwest wind around 6 mph.
Wednesday
Widespread haze before noon. Sunny, with a high near 63. Northwest wind around 5 mph becoming calm in the morning.
Wednesday Night
Clear, with a low around 48. West northwest wind around 6 mph.
Thursday
Sunny, with a high near 62. West northwest wind around 5 mph becoming calm in the morning.
Thursday Night
Mostly clear, with a low around 47. Northwest wind around 5 mph.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Mostly sunny, with a high near 57.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 41.
Monday
A chance of showers. Partly sunny, with a high near 54.
Monday Night
A chance of showers. Mostly cloudy, with a low around 43.
Tuesday
A chance of showers. Partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
18 Miles SSE Alder Springs CA
 39.42°N 122.61°W (Elev. 2500 ft)
1:21 pm PST Dec 9, 2025
8pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database