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

Portola - Gulling Street (CQ236)

Lat: 39.81336°NLon: 120.47069°WElev: 4895.0ft.

NA

39°F

4°C

Humidity 85%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 25 Dec 04:00 AM PST
Extended Forecast for

Portola CA

Winter Storm Warning December 25, 05:50am until December 26, 10:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning December 25, 05:50am until December 26, 10:00am

    NOW until 10:00am Fri

    Winter Storm Warning

  • Overnight

    Low: 33 °F

    Rain/Snow and
    Patchy Fog

  • Christmas Day

    Christmas Day: Rain and snow, becoming all snow after 1pm. Patchy fog before 2pm, then patchy fog after 5pm. Snow level 5100 feet. High near 40. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 40 °F

    Rain/Snow and
    Patchy Fog

  • Thursday Night

    Thursday Night: Snow before 7pm, then rain and snow between 7pm and 10pm, then snow after 10pm. The snow could be heavy at times. Patchy dense fog before midnight, then patchy dense fog after 5am. Patchy dense freezing fog between midnight and 5am. Low around 27. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 27 °F

    Rain/Snow and
    Patchy Dense
    Freezing Fog

  • Friday

    Friday: Snow. Patchy fog between 9am and 10am. Patchy freezing fog between 8am and 9am. High near 38. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 38 °F

    Snow and
    Patchy
    Freezing Fog

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 23. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Snow Likely

  • Saturday

    Saturday: A 30 percent chance of snow, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 39. Calm wind becoming north around 5 mph. Little or no snow accumulation expected.

    High: 39 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

Detailed Forecast

Overnight
Rain and snow. Patchy fog. Snow level 5600 feet. Low around 33. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.
Christmas Day
Rain and snow, becoming all snow after 1pm. Patchy fog before 2pm, then patchy fog after 5pm. Snow level 5100 feet. High near 40. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Snow before 7pm, then rain and snow between 7pm and 10pm, then snow after 10pm. The snow could be heavy at times. Patchy dense fog before midnight, then patchy dense fog after 5am. Patchy dense freezing fog between midnight and 5am. Low around 27. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Friday
Snow. Patchy fog between 9am and 10am. Patchy freezing fog between 8am and 9am. High near 38. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 23. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Saturday
A 30 percent chance of snow, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 39. Calm wind becoming north around 5 mph. Little or no snow accumulation expected.
Saturday Night
Partly cloudy, with a low around 14.
Sunday
Sunny, with a high near 38.
Sunday Night
Clear, with a low around 12.
Monday
Sunny, with a high near 42.
Monday Night
Clear, with a low around 15.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly clear, with a low around 20.
Wednesday
Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portola CA
 39.81°N 120.46°W (Elev. 4984 ft)
Last Update:
1:16 am PST Dec 25, 2025
Forecast Valid:
5am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation