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	SSW 18 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Wind Chill	27°F (-3°C)
Last update	26 Dec 02:01 AM PST

More Information:

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

Extended Forecast for

7 Miles NNE Hopland CA

Flood Watch December 26, 02:27am until December 26, 10:00pm

Wind Advisory December 26, 02:27am until December 26, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 26, 02:27am until December 26, 10:00pm
Wind Advisory December 26, 02:27am until December 26, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 41 °F
Showers and
Windy
Friday
High: 44 °F
Showers and
Windy
Friday Night
Low: 37 °F
Showers
Likely and
Breezy then
Chance
Showers
Saturday
High: 45 °F
Slight Chance
Showers then
Sunny
Saturday Night
Low: 38 °F
Partly Cloudy
Sunday
High: 52 °F
Sunny
Sunday Night
Low: 40 °F
Partly Cloudy
Monday
High: 55 °F
Sunny

Detailed Forecast

Overnight

Showers. Low around 41. Windy, with a south wind around 23 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday

Showers. High near 44. Windy, with a south wind 16 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Friday Night

Showers likely, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Breezy, with an east southeast wind 14 to 16 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 10 percent chance of showers before 10am. Sunny, with a high near 45. North northwest wind around 8 mph.

Saturday Night

Partly cloudy, with a low around 38. North northeast wind around 6 mph.

Sunday

Sunny, with a high near 52. East northeast wind around 6 mph.

Sunday Night

Partly cloudy, with a low around 40.

Monday

Sunny, with a high near 55.

Monday Night

Mostly clear, with a low around 42.