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

Winter Weather Advisory in effect from December 26, 04:00 AM PST until December 27, 07:00 AM PST

Current conditions at

Stampede Pass (KSMP)

Lat: 47.27648°NLon: 121.33817°WElev: 3970.0ft.

light snow,freezing fog

31°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	29.53 in (1000.0 mb)
Dewpoint	31°F (-1°C)
Visibility	0.25 mi
Last update	25 Dec 01:42 PM PST

More Information:

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

Extended Forecast for

6 Miles E Snoqualmie Pass WA

Winter Weather Advisory December 26, 04:00am until December 27, 07:00am

Click here for hazard details and duration

Winter Weather Advisory

Christmas Day
High: 36 °F
Rain/Snow
Tonight
Low: 29 °F
Chance
Rain/Snow
then Slight
Chance Snow
Friday
High: 34 °F
Heavy Snow
Friday Night
Low: 23 °F
Heavy Snow
then Snow
Likely
Saturday
High: 28 °F
Slight Chance
Snow then
Partly Sunny
Saturday Night
Low: 18 °F
Mostly Cloudy
Sunday
High: 33 °F
Partly Sunny
Sunday Night
Low: 24 °F
Mostly Cloudy
Monday
High: 37 °F
Mostly Cloudy

Detailed Forecast

Christmas Day

Rain, possibly mixed with snow, mainly before 4pm. High near 36. Southeast wind around 5 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Tonight

A chance of rain and snow before 10pm, then a slight chance of snow after 1am. Mostly cloudy, with a low around 29. Calm wind. Chance of precipitation is 40%.

Friday

Snow, mainly after 7am. The snow could be heavy at times. High near 34. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

Friday Night

Snow, mainly before 4am. The snow could be heavy at times. Low around 23. West wind around 16 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

Saturday

A 20 percent chance of snow before 10am. Partly sunny, with a high near 28. West wind around 6 mph.

Saturday Night

Mostly cloudy, with a low around 18.

Sunday

Partly sunny, with a high near 33.

Sunday Night

Mostly cloudy, with a low around 24.

Monday

Mostly cloudy, with a high near 37.

Monday Night

Mostly cloudy, with a low around 27.