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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

50°F

10°C

Humidity 69%
Wind Speed N 5 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill48°F (9°C)
Last update 09 Dec 07:28 PM PST
Extended Forecast for

5 Miles SSW Antioch CA

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Patchy dense fog between 9am and 10am.  Otherwise, mostly sunny, with a high near 56. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 56 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Calm wind.
Wednesday
Patchy dense fog between 9am and 10am. Otherwise, mostly sunny, with a high near 56. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 45. Calm wind.
Thursday
Mostly sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 44. Calm wind.
Friday
Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 56.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
A slight chance of rain. Partly sunny, with a high near 57.
Monday Night
A chance of rain. Mostly cloudy, with a low around 50.
Tuesday
A slight chance of rain. Partly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Antioch CA
 37.94°N 121.82°W (Elev. 600 ft)
12:26 pm PST Dec 9, 2025
8pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database