Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

LYONS VALLEY (COWC1)

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

48°F

9°C

Humidity	100%
Wind Speed	SSE 29 MPH
Barometer	NA
Dewpoint	48°F (9°C)
Visibility	NA
Wind Chill	39°F (4°C)
Last update	24 Dec 12:01 AM PST

More Information:

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

Extended Forecast for

5 Miles SW Lakeport CA

Flood Watch December 24, 01:07am until December 26, 10:00pm

High Wind Watch December 25, 12:00am until December 25, 07:00pm

High Wind Warning December 24, 01:07am until December 24, 06:00am

Click here for hazard details and duration

Flood Watch

High Wind Watch

High Wind Warning

Flood Watch December 24, 01:07am until December 26, 10:00pm
High Wind Warning December 24, 01:07am until December 24, 06:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 44 °F
Showers and
Very Windy
Wednesday
High: 49 °F
Rain
Wednesday Night
Low: 48 °F
Showers and
Very Windy
Christmas Day
High: 46 °F
Showers and
Very Windy
Thursday Night
Low: 44 °F
Showers
Friday
High: 46 °F
Showers
Friday Night
Low: 42 °F
Rain Likely
Saturday
High: 47 °F
Mostly Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Low around 44. Very windy, with a south southeast wind around 39 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Rain and possibly a thunderstorm. High near 49. Southwest wind around 11 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

Rain and possibly a thunderstorm before 7pm, then showers and possibly a thunderstorm after 7pm. Steady temperature around 48. Very windy, with a south southeast wind 16 to 21 mph increasing to 27 to 32 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Christmas Day

Showers and possibly a thunderstorm before 10am, then rain between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 46. Very windy, with a south wind 27 to 32 mph decreasing to 21 to 26 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 44. South wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Friday

Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 46. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

Rain likely, mainly before 10pm. Mostly cloudy, with a low around 42. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday

Mostly sunny, with a high near 47.

Saturday Night

Mostly clear, with a low around 39.

Sunday

Sunny, with a high near 52.

Sunday Night

Mostly clear, with a low around 40.

Monday

Sunny, with a high near 55.

Monday Night

Mostly clear, with a low around 44.