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

HELL HOLE (HLLC1)

Lat: 39.06971°NLon: 120.41989°WElev: 5240.0ft.

43°F

6°C

Humidity	89%
Wind Speed	S 10 MPH
Barometer	NA
Dewpoint	40°F (4°C)
Visibility	NA
Wind Chill	37°F (3°C)
Last update	24 Dec 12:09 AM PST

More Information:

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

Extended Forecast for

4 Miles ESE Donner Summit CA

Flood Watch December 24, 12:49am 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, 12:49am until December 26, 04:00pm
Winter Storm Warning until December 26, 10:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 35 °F
Rain/Snow and
Breezy
Wednesday
High: 36 °F
Rain/Snow and
Breezy then
Heavy Snow
Wednesday Night
Low: 31 °F
Heavy Snow
and Breezy
Christmas Day
High: 33 °F
Heavy Snow
and Breezy
Thursday Night
Low: 23 °F
Heavy Snow
and Breezy
Friday
High: 29 °F
Heavy Snow
and Breezy
Friday Night
Low: 16 °F
Snow Likely
Saturday
High: 32 °F
Chance Snow
then Sunny

Detailed Forecast

Overnight

Rain and snow. The rain could be heavy at times. Steady temperature around 35. Breezy, with a south wind 23 to 25 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of around an inch possible.

Wednesday

Rain and snow, becoming all snow after 7am. The rain and snow could be heavy at times. High near 36. Breezy, with a south southwest wind 18 to 23 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

Wednesday Night

Snow. The snow could be heavy at times. Steady temperature around 31. Breezy, with a south wind 17 to 25 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

Christmas Day

Snow. The snow could be heavy at times. High near 33. Breezy, with a south southwest wind 18 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 inches possible.

Thursday Night

Snow. The snow could be heavy at times. Low around 23. Breezy, with a south southwest wind 24 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 inches possible.

Friday

Snow. The snow could be heavy at times. High near 29. Breezy. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

Friday Night

Snow likely, mainly before 10pm. Mostly cloudy, with a low around 16. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

Saturday

A chance of snow before 10am. Mostly sunny, with a high near 32.

Saturday Night

Partly cloudy, with a low around 15.

Sunday

Sunny, with a high near 35.

Sunday Night

Mostly clear, with a low around 17.

Monday

Sunny, with a high near 39.

Monday Night

Mostly clear, with a low around 22.