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

SIMS (SMSC1)

Lat: 41.0713°NLon: 122.36993°WElev: 2537.0ft.

42°F

6°C

Humidity	100%
Wind Speed	NNW 1 MPH
Barometer	NA
Dewpoint	42°F (6°C)
Visibility	NA
Last update	24 Dec 10:32 PM PST

More Information:

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

Extended Forecast for

9 Miles S Dunsmuir CA

Flood Watch December 24, 11:41pm until December 26, 04:00pm

Winter Storm Warning until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

Winter Storm Warning

Flood Watch December 24, 11:41pm until December 26, 04:00pm
Winter Storm Warning until December 26, 10:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 38 °F
Heavy Rain
and Breezy
Christmas Day
High: 35 °F
Rain/Snow and
Windy
Thursday Night
Low: 32 °F
Heavy Snow
and Breezy
Friday
High: 34 °F
Snow and
Breezy
Friday Night
Low: 28 °F
Snow then
Chance Snow
Saturday
High: 34 °F
Chance Snow
Saturday Night
Low: 25 °F
Partly Cloudy
Sunday
High: 39 °F
Mostly Sunny

Detailed Forecast

Tonight

Rain. The rain could be heavy at times. Steady temperature around 38. Breezy, with a south southeast wind 21 to 28 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Christmas Day

Rain and snow. Steady temperature around 35. Windy, with a south wind 29 to 34 mph decreasing to 23 to 28 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

Thursday Night

Snow. The snow could be heavy at times. Low around 32. Breezy, with a south wind 22 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

Friday

Snow. High near 34. Breezy, with a south wind 13 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Friday Night

Snow, mainly before 10pm. Low around 28. Southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Saturday

A 30 percent chance of snow, mainly before 10am. Mostly sunny, with a high near 34. New snow accumulation of less than a half inch possible.

Saturday Night

Partly cloudy, with a low around 25.

Sunday

Mostly sunny, with a high near 39.

Sunday Night

Mostly clear, with a low around 31.

Monday

Sunny, with a high near 44.

Monday Night

Mostly clear, with a low around 33.