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 >

Current conditions at

LAS TRAMPAS (LTRC1)

Lat: 37.83389°NLon: 122.06694°WElev: 1760.0ft.

NA

51°F

11°C

Humidity 58%
Wind Speed E 12 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 08 Dec 10:28 PM PST
Extended Forecast for

3 Miles ESE Walnut Creek CA

  • Tonight

    Tonight: Patchy dense fog.  Otherwise, partly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Patchy Dense
    Fog

  • Tuesday

    Tuesday: Areas of fog before 10am.  Otherwise, mostly sunny, with a high near 55. Calm wind becoming north around 5 mph in the afternoon.

    High: 55 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 9pm.  Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before 9am.  Otherwise, sunny, with a high near 65. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 65 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, sunny, with a high near 63.

    High: 63 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after midnight.  Otherwise, mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, partly cloudy, with a low around 39. Calm wind.
Tuesday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 55. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 42. Calm wind.
Wednesday
Areas of fog before 9am. Otherwise, sunny, with a high near 65. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 42. Calm wind.
Thursday
Areas of fog before 9am. Otherwise, sunny, with a high near 63.
Thursday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 41.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 63.
Friday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 41.
Saturday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 62.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Sunday
Areas of fog. Otherwise, partly sunny, with a high near 62.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 46.
Monday
A slight chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Walnut Creek CA
 37.88°N 122.01°W (Elev. 594 ft)
12:26 pm PST Dec 8, 2025
11pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database