National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

BEN LOMOND (BNDC1)

Lat: 37.13094°NLon: 122.17261°WElev: 2598.0ft.

NA

48°F

9°C

Humidity 100%
Wind Speed S 19 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 24 Dec 11:50 PM PST
Extended Forecast for

Ben Lomond CA

Flood Watch December 25, 12:22am until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
Flood Advisory until December 25, 03:15am
Click here for hazard details and duration
Flood Watch
Wind Advisory
Flood Advisory
  •  
    Flood Watch December 25, 12:22am until December 26, 10:00pm
    Wind Advisory until December 25, 10:00am
    Flood Advisory until December 25, 03:15am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 48 °F

    Severe
    Thunderstorms
    and Breezy

  • Christmas Day

    Christmas Day: Rain and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 58. South southwest wind 14 to 20 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Some of the storms could be severe. Low around 45. Southwest wind 9 to 15 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    Severe
    Thunderstorms
    then Rain

  • Friday

    Friday: Rain. High near 56. South wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 41. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain Likely
    then Chance
    Rain

  • Saturday

    Saturday: A 30 percent chance of rain, mainly before 10am. Mostly sunny, with a high near 58. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 60.

    High: 60 °F

    Areas Frost
    then Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 48. Breezy, with a south wind 18 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
Rain and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 58. South southwest wind 14 to 20 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Some of the storms could be severe. Low around 45. Southwest wind 9 to 15 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Rain. High near 56. South wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 41. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of rain, mainly before 10am. Mostly sunny, with a high near 58. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 60.
Sunday Night
Patchy frost after 2am. Otherwise, clear, with a low around 36.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 64.
Monday Night
Clear, with a low around 39.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ben Lomond CA
 37.1°N 122.09°W (Elev. 453 ft)
Last Update:
11:27 pm PST Dec 24, 2025
Forecast Valid:
12am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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