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

LYONS VALLEY (COWC1)

Lat: 39.12583°NLon: 123.07333°WElev: 3355.0ft.

37°F

3°C

Humidity	99%
Wind Speed	SW 25 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Wind Chill	25°F (-4°C)
Last update	26 Dec 12:01 AM PST

More Information:

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

Extended Forecast for

4 Miles SE Hopland CA

Flood Watch December 26, 01:02am until December 26, 10:00pm

Wind Advisory December 26, 01:02am until December 26, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 26, 01:02am until December 26, 10:00pm
Wind Advisory December 26, 01:02am until December 26, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 41 °F
Showers
Friday
High: 51 °F
Showers
Friday Night
Low: 36 °F
Chance
Showers
Saturday
High: 52 °F
Mostly Sunny
Saturday Night
Low: 34 °F
Mostly Clear
then Patchy
Fog
Sunday
High: 57 °F
Patchy Fog
then Sunny
Sunday Night
Low: 34 °F
Mostly Clear
Monday
High: 60 °F
Sunny

Detailed Forecast

Overnight

Showers. Low around 41. South wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday

Showers. High near 51. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

A 50 percent chance of showers. Mostly cloudy, with a low around 36. East southeast wind 7 to 11 mph becoming north after midnight. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Mostly sunny, with a high near 52. Calm wind becoming north northwest around 5 mph in the morning.

Saturday Night

Patchy fog after 4am. Otherwise, partly cloudy, with a low around 34. Calm wind.

Sunday

Patchy fog before 7am. Otherwise, mostly sunny, with a high near 57. Light northeast wind.

Sunday Night

Mostly clear, with a low around 34.

Monday

Sunny, with a high near 60.

Monday Night

Mostly clear, with a low around 37.