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

LAS TRAMPAS (LTRC1)

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

NA

51°F

11°C

Humidity 61%
Wind Speed E 17 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 10 Dec 01:28 AM PST
Extended Forecast for

2 Miles SE Walnut Creek CA

  • Overnight

    Overnight: Areas of fog.  Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Areas Fog

  • Wednesday

    Wednesday: Areas of dense fog before 9am.  Otherwise, mostly sunny, with a high near 50. Calm wind becoming north around 6 mph in the morning.

    High: 50 °F

    Areas Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy dense fog after 1am.  Otherwise, mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear
    then Patchy
    Dense Fog

  • Thursday

    Thursday: Areas of dense fog before 9am.  Otherwise, sunny, with a high near 55. North northeast wind 3 to 6 mph.

    High: 55 °F

    Areas Dense
    Fog then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, sunny, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 62.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after midnight.  Otherwise, partly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Overnight
Areas of fog. Otherwise, partly cloudy, with a low around 41. Calm wind.
Wednesday
Areas of dense fog before 9am. Otherwise, mostly sunny, with a high near 50. Calm wind becoming north around 6 mph in the morning.
Wednesday Night
Patchy dense fog after 1am. Otherwise, mostly clear, with a low around 41. Calm wind.
Thursday
Areas of dense fog before 9am. Otherwise, sunny, with a high near 55. North northeast wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 40. Calm wind.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 58.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 40.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 62.
Saturday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 41.
Sunday
Areas of fog before 10am. Otherwise, partly sunny, with a high near 60.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 44.
Monday
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 62.
Monday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Walnut Creek CA
 37.88°N 122.03°W (Elev. 220 ft)
12:26 am PST Dec 10, 2025
1am PST Dec 10, 2025-6pm PST Dec 16, 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