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

Alturas (KAAT)

Lat: 41.48362°NLon: 120.5615°WElev: 4383.0ft.

Partly Cloudy

37°F

3°C

Humidity	80%
Wind Speed	S 5 MPH
Barometer	29.64 in (1003.73 mb)
Dewpoint	32°F (0°C)
Visibility	10.00 mi
Wind Chill	33°F (1°C)
Last update	24 Dec 09:00 PM PST

More Information:

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

Extended Forecast for

Canby CA

Wind Advisory December 25, 01:00am until December 25, 01:00pm

Winter Storm Warning December 24, 09:30pm until December 26, 10:00am

Click here for hazard details and duration

Wind Advisory

Winter Storm Warning

Winter Storm Warning December 24, 09:30pm until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Tonight
Low: 37 °F
Rain Likely
Christmas Day
High: 43 °F
Rain/Snow
Thursday Night
Low: 28 °F
Rain/Snow
Friday
High: 41 °F
Snow then
Rain/Snow
Friday Night
Low: 22 °F
Rain/Snow
Likely then
Chance Snow
Saturday
High: 37 °F
Slight Chance
Snow
Saturday Night
Low: 11 °F
Partly Cloudy
Sunday
High: 39 °F
Mostly Sunny

Detailed Forecast

Tonight

Rain likely, mainly between 1am and 2am. Snow level 5700 feet. Mostly cloudy, with a steady temperature around 37. South southeast wind 6 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Christmas Day

Rain and snow. Snow level 5400 feet lowering to 4700 feet in the afternoon . High near 43. South wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Thursday Night

Snow, possibly mixed with rain, becoming all snow after 1am. Snow level 4400 feet. Low around 28. South wind 7 to 9 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

Friday

Snow before 4pm, then rain likely, possibly mixed with snow. High near 41. Southwest wind around 11 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Friday Night

Rain likely, possibly mixed with snow, becoming all snow after 7pm. Mostly cloudy, with a low around 22. West southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Saturday

A 20 percent chance of snow. Mostly sunny, with a high near 37.

Saturday Night

Partly cloudy, with a low around 11.

Sunday

Mostly sunny, with a high near 39.

Sunday Night

Mostly clear, with a low around 16.

Monday

Sunny, with a high near 44.

Monday Night

Mostly clear, with a low around 18.