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

Portola - Gulling Street (CQ236)

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

NA

45°F

7°C

Humidity 82%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 24 Dec 04:00 AM PST
Extended Forecast for

Portola CA

Flood Watch until December 24, 10:00pm
Winter Storm Warning until December 26, 10:00am
Click here for hazard details and duration
Flood Watch
Winter Storm Warning
  •  
    Flood Watch until December 24, 10:00pm
    Winter Storm Warning until December 26, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 35 °F

    Rain

  • Wednesday

    Wednesday: Rain before 10am, then rain and snow between 10am and 4pm, then a chance of rain after 4pm. Snow level 6700 feet lowering to 5800 feet in the afternoon . High near 46. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow before 10pm, then rain between 10pm and 1am, then rain and snow likely after 1am. Snow level 6000 feet. Low around 32. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Rain/Snow

  • Christmas Day

    Christmas Day: Rain and snow. Snow level 5300 feet. High near 41. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    High: 41 °F

    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 1am. The snow could be heavy at times. Low around 28. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 6 inches possible.

    Low: 28 °F

    Rain/Snow

  • Friday

    Friday: Snow. 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 1 to 2 inches possible.

    High: 38 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 22. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Snow Likely

  • Saturday

    Saturday: A slight chance of snow. Mostly sunny, with a high near 39.

    High: 39 °F

    Slight Chance
    Snow

Detailed Forecast

Overnight
Rain. Snow level 7700 feet. Low around 35. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Wednesday
Rain before 10am, then rain and snow between 10am and 4pm, then a chance of rain after 4pm. Snow level 6700 feet lowering to 5800 feet in the afternoon . High near 46. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow before 10pm, then rain between 10pm and 1am, then rain and snow likely after 1am. Snow level 6000 feet. Low around 32. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Christmas Day
Rain and snow. Snow level 5300 feet. High near 41. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Thursday Night
Rain and snow, becoming all snow after 1am. The snow could be heavy at times. Low around 28. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 6 inches possible.
Friday
Snow. 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 1 to 2 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 22. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
A slight chance of snow. Mostly sunny, with a high near 39.
Saturday Night
Partly cloudy, with a low around 15.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 15.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola CA
 39.81°N 120.46°W (Elev. 4984 ft)
Last Update:
1:15 am PST Dec 24, 2025
Forecast Valid:
5am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation