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

31°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	29.62 in (1003.05 mb)
Dewpoint	31°F (-1°C)
Visibility	10.00 mi
Last update	25 Dec 06:56 PM 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

Tonight
Low: 29 °F
Chance
Rain/Snow and
Patchy
Freezing Fog
Friday
High: 35 °F
Heavy Snow
and Areas
Freezing Fog
Friday Night
Low: 25 °F
Heavy Snow
Saturday
High: 29 °F
Chance Snow
then Partly
Sunny
Saturday Night
Low: 20 °F
Mostly Cloudy
Sunday
High: 34 °F
Partly Sunny
Sunday Night
Low: 24 °F
Mostly Cloudy
Monday
High: 38 °F
Mostly Cloudy
Monday Night
Low: 29 °F
Mostly Cloudy

Detailed Forecast

Tonight

A chance of rain and snow before 10pm, then a chance of rain and snow after 1am. Patchy fog before 1am. Patchy freezing fog after 10pm. Otherwise, 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. Patchy fog between 7am and 10am. Areas of freezing fog before 10am. High near 35. Calm wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 22 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 11 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

Saturday

A 30 percent chance of snow before 10am. Partly sunny, with a high near 29. Light west wind.

Saturday Night

Mostly cloudy, with a low around 20. Calm wind.

Sunday

Partly sunny, with a high near 34.

Sunday Night

Mostly cloudy, with a low around 24.

Monday

Mostly cloudy, with a high near 38.

Monday Night

Mostly cloudy, with a low around 29.