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

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

Overcast

41°F

5°C

Humidity	86%
Wind Speed	N 6 MPH
Barometer	29.47 in (997.97 mb)
Dewpoint	37°F (3°C)
Visibility	10.00 mi
Wind Chill	37°F (3°C)
Last update	25 Dec 02:00 AM PST

More Information:

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

Extended Forecast for

15 Miles NE Weed CA

Wind Advisory until December 25, 01:00pm

Winter Storm Warning December 25, 02:17am until December 26, 10:00am

Click here for hazard details and duration

Wind Advisory

Winter Storm Warning

Wind Advisory until December 25, 01:00pm
Winter Storm Warning December 25, 02:17am until December 26, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 34 °F
Rain/Snow
Christmas Day
High: 35 °F
Rain/Snow
then Snow
Showers
Thursday Night
Low: 26 °F
Heavy Snow
then Snow
Showers
Likely
Friday
High: 37 °F
Snow
Friday Night
Low: 23 °F
Snow Likely
then Slight
Chance Snow
Saturday
High: 33 °F
Slight Chance
Snow then
Mostly Sunny
Saturday Night
Low: 17 °F
Mostly Cloudy
Sunday
High: 37 °F
Mostly Sunny

Detailed Forecast

Overnight

Rain and snow showers. Snow level 5500 feet. Steady temperature around 34. East southeast wind around 10 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of 1 to 3 inches possible.

Christmas Day

Rain and snow showers, becoming all snow after 10am. Steady temperature around 35. South southwest wind 10 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Thursday Night

Snow showers. The snow could be heavy at times. Low around 26. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Friday

Snow showers likely before 10am, then snow, mainly after 10am. High near 37. Southwest wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Friday Night

Snow likely, mainly before 10pm. Mostly cloudy, with a low around 23. West wind around 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday

A 20 percent chance of snow before 10am. Mostly sunny, with a high near 33.

Saturday Night

Mostly cloudy, with a low around 17.

Sunday

Mostly sunny, with a high near 37.

Sunday Night

Mostly clear, with a low around 21.

Monday

Sunny, with a high near 42.

Monday Night

Mostly clear, with a low around 26.