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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Overcast

56°F

13°C

Humidity 83%
Wind Speed SW 6 MPH
Barometer 29.53 in (1000.0 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 24 Dec 04:53 AM PST
Extended Forecast for

Calistoga CA

Flood Watch December 24, 05:02am until December 26, 10:00pm
Wind Advisory December 24, 05:02am until December 24, 08:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 05:02am until December 26, 10:00pm
    Wind Advisory December 24, 05:02am until December 24, 08:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 48 °F

    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Patchy fog between 9am and 1pm. Steady temperature around 51. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 51 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Patchy fog before 7pm. Steady temperature around 50. East southeast wind 8 to 13 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 50 °F

    Severe
    Thunderstorms
    and Patchy
    Fog then
    Showers

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm before 8am, then showers between 8am and 1pm, then showers and possibly a thunderstorm after 1pm. Widespread fog before 9am. High near 50. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 50 °F

    Showers and
    Fog

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Patchy fog after 1am. Low around 43. South southwest wind 7 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 43 °F

    Showers and
    Patchy Fog

  • Friday

    Friday: Showers, with thunderstorms also possible after 10am. Patchy fog. High near 51. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 51 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Areas of fog. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%.

    Low: 41 °F

    Showers
    Likely and
    Areas Fog

  • Saturday

    Saturday: A slight chance of showers before 10am. Areas of fog before 2pm. Otherwise, mostly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers and
    Areas Fog
    then Areas
    Fog

Detailed Forecast

Overnight
Showers. Low around 48. Southwest wind around 16 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Patchy fog between 9am and 1pm. Steady temperature around 51. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm. Some of the storms could be severe. Patchy fog before 7pm. Steady temperature around 50. East southeast wind 8 to 13 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
Showers and possibly a thunderstorm before 8am, then showers between 8am and 1pm, then showers and possibly a thunderstorm after 1pm. Widespread fog before 9am. High near 50. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 39 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. Patchy fog after 1am. Low around 43. South southwest wind 7 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
Showers, with thunderstorms also possible after 10am. Patchy fog. High near 51. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Areas of fog. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Saturday
A slight chance of showers before 10am. Areas of fog before 2pm. Otherwise, mostly sunny, with a high near 52.
Saturday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 36.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 54.
Sunday Night
Patchy frost. Otherwise, mostly clear, with a low around 36.
Monday
Patchy frost. Otherwise, sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Calistoga CA
 38.58°N 122.59°W (Elev. 525 ft)
Last Update:
4:29 am PST Dec 24, 2025
Forecast Valid:
5am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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