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	96%
Wind Speed	N 0 MPH
Barometer	29.62 in (1003.05 mb)
Dewpoint	30°F (-1°C)
Visibility	10.00 mi
Last update	25 Dec 09:56 PM PST

More Information:

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

Extended Forecast for

4 Miles SE 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: 26 °F
Patchy
Freezing Fog
then Chance
Snow and
Patchy
Freezing Fog
Friday
High: 32 °F
Heavy Snow
Friday Night
Low: 22 °F
Heavy Snow
then Snow
Likely
Saturday
High: 26 °F
Chance Snow
then Partly
Sunny
Saturday Night
Low: 17 °F
Mostly Cloudy
Sunday
High: 31 °F
Partly Sunny
Sunday Night
Low: 22 °F
Mostly Cloudy
Monday
High: 35 °F
Mostly Cloudy
Monday Night
Low: 26 °F
Mostly Cloudy

Detailed Forecast

Tonight

A 30 percent chance of snow, mainly after 4am. Patchy freezing fog. Mostly cloudy, with a low around 26. Calm wind.

Friday

Snow, mainly after 7am. The snow could be heavy at times. High near 32. Calm wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 22 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 22. West wind around 16 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 26. West wind around 5 mph.

Saturday Night

Mostly cloudy, with a low around 17. Calm wind.

Sunday

Partly sunny, with a high near 31.

Sunday Night

Mostly cloudy, with a low around 22.

Monday

Mostly cloudy, with a high near 35.

Monday Night

Mostly cloudy, with a low around 26.