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 Weather Advisory until December 26, 10:00 PM PST

Current conditions at

BLACK ROCK (OKFO3)

Lat: 43.52831°NLon: 121.81601°WElev: 4891.0ft.

31°F

-1°C

Humidity	98%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Last update	26 Dec 01:15 AM PST

More Information:

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

Extended Forecast for

2 Miles NW Cascade Summit OR

Winter Weather Advisory December 26, 02:08am until December 26, 10:00pm

Click here for hazard details and duration

Winter Weather Advisory

Winter Weather Advisory December 26, 02:08am until December 26, 10:00pm
NOW until 10:00pm Fri
Winter Weather Advisory
Overnight
Low: 29 °F
Chance Snow
Friday
High: 34 °F
Snow
Friday Night
Low: 22 °F
Snow
Saturday
High: 28 °F
Snow then
Chance Snow
Saturday Night
Low: 16 °F
Mostly Cloudy
Sunday
High: 36 °F
Mostly Sunny
Sunday Night
Low: 22 °F
Mostly Cloudy
Monday
High: 41 °F
Mostly Sunny

Detailed Forecast

Overnight

A 40 percent chance of snow. Mostly cloudy, with a steady temperature around 29. South southwest wind around 8 mph. Total nighttime snow accumulation of 1 to 3 inches possible.

Friday

Snow. High near 34. South wind 7 to 9 mph becoming west in the afternoon. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow. Low around 22. West wind around 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday

Snow, mainly before 10am. High near 28. West northwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Saturday Night

Mostly cloudy, with a low around 16. Calm wind.

Sunday

Mostly sunny, with a high near 36.

Sunday Night

Mostly cloudy, with a low around 22.

Monday

Mostly sunny, with a high near 41.

Monday Night

Partly cloudy, with a low around 28.

Tuesday

Mostly sunny, with a high near 47.