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

Winter Storm Warning until December 26, 10:00 AM PST

Current conditions at

Portola - Gulling Street (CQ236)

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

33°F

1°C

Humidity	95%
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	32°F (0°C)
Visibility	NA
Last update	25 Dec 05:00 PM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Portola CA

Winter Storm Warning December 25, 06:05pm until December 26, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 06:05pm until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Tonight
Low: 27 °F
Rain/Snow and
Areas
Freezing Fog
Friday
High: 39 °F
Snow and
Dense
Freezing Fog
Friday Night
Low: 24 °F
Snow Likely
and Areas
Freezing Fog
Saturday
High: 39 °F
Chance Snow
then Mostly
Sunny
Saturday Night
Low: 14 °F
Partly Cloudy
Sunday
High: 38 °F
Mostly Sunny
Sunday Night
Low: 12 °F
Mostly Clear
Monday
High: 40 °F
Sunny

Detailed Forecast

Tonight

Snow before 7pm, then rain and snow between 7pm and 10pm, then snow after 10pm. The snow could be heavy at times. Widespread dense fog before 11pm, then areas of dense fog after 4am. Areas of freezing fog between 11pm and 4am. Low around 27. South wind around 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 4 to 8 inches possible.

Friday

Snow, mainly before 7am. Areas of dense fog before 11am, then widespread dense fog after 5pm. Widespread dense freezing fog between 7am and 10am. High near 39. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

Friday Night

Snow likely, mainly before 10pm. Patchy fog before 10pm. Areas of freezing fog before 8pm. Otherwise, mostly cloudy, with a low around 24. Southwest wind around 5 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Saturday

A 30 percent chance of snow before 10am. Mostly sunny, with a high near 39. Calm wind becoming northwest around 5 mph. Little or no snow accumulation expected.

Saturday Night

Partly cloudy, with a low around 14. East wind around 5 mph.

Sunday

Mostly sunny, with a high near 38. East wind around 5 mph.

Sunday Night

Mostly clear, with a low around 12.

Monday

Sunny, with a high near 40.

Monday Night

Mostly clear, with a low around 16.

Tuesday

Sunny, with a high near 45.