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.

unknown precip,mist

31°F

-1°C

Humidity	100%
Wind Speed	ENE 3 MPH
Barometer	29.54 in (1000.34 mb)
Dewpoint	31°F (-1°C)
Visibility	0.75 mi
Last update	25 Dec 10:56 AM PST

More Information:

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

Extended Forecast for

2 Miles SSE 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: 38 °F
Rain/Snow
Tonight
Low: 28 °F
Rain/Snow
Likely and
Patchy Fog
Friday
High: 36 °F
Heavy Snow
and Patchy
Fog
Friday Night
Low: 25 °F
Heavy Snow
then Snow
Likely
Saturday
High: 30 °F
Slight Chance
Snow then
Partly Sunny
Saturday Night
Low: 22 °F
Mostly Cloudy
then Patchy
Fog
Sunday
High: 35 °F
Patchy Fog
then Partly
Sunny
Sunday Night
Low: 25 °F
Mostly Cloudy
Monday
High: 39 °F
Mostly Cloudy

Detailed Forecast

Christmas Day

Rain, possibly mixed with snow, mainly before 4pm. High near 38. Southeast wind around 6 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Tonight

Rain and snow likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Friday

Snow, mainly after 7am. The snow could be heavy at times. Patchy fog before 10am. High near 36. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Friday Night

Snow, mainly before 4am. The snow could be heavy at times. Low around 25. West wind 6 to 9 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

Saturday

A 20 percent chance of snow before 10am. Mostly cloudy, with a high near 30. Light west wind.

Saturday Night

Patchy fog between 1am and 4am. Otherwise, mostly cloudy, with a low around 22.

Sunday

Patchy fog between 7am and 10am. Otherwise, partly sunny, with a high near 35.

Sunday Night

Mostly cloudy, with a low around 25.

Monday

Mostly cloudy, with a high near 39.

Monday Night

Mostly cloudy, with a low around 29.