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.

29°F

-2°C

Humidity	96%
Wind Speed	NA NA MPH
Barometer	29.57 in (1001.36 mb)
Dewpoint	28°F (-2°C)
Visibility	10.00 mi
Last update	25 Dec 03:56 AM PST

More Information:

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

Extended Forecast for

8 Miles NE 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

Overnight
Low: 22 °F
Slight Chance
Snow
Christmas Day
High: 28 °F
Snow
Thursday Night
Low: 22 °F
Snow Likely
then Chance
Snow
Friday
High: 26 °F
Heavy Snow
Friday Night
Low: 16 °F
Heavy Snow
then Snow
Likely
Saturday
High: 18 °F
Slight Chance
Snow then
Partly Sunny
Saturday Night
Low: 14 °F
Mostly Cloudy
Sunday
High: 25 °F
Partly Sunny
Sunday Night
Low: 19 °F
Mostly Cloudy

Detailed Forecast

Overnight

A 20 percent chance of snow. Mostly cloudy, with a low around 22. Southeast wind around 13 mph, with gusts as high as 23 mph.

Christmas Day

Snow, mainly between 10am and 4pm. High near 28. Southeast wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Thursday Night

Snow likely, mainly before 10pm. Mostly cloudy, with a low around 22. Southwest wind around 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

Friday

Snow, mainly after 7am. The snow could be heavy at times. High near 26. Southwest wind 10 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

Friday Night

Snow, mainly before 4am. The snow could be heavy at times. Low around 16. West wind 18 to 21 mph, with gusts as high as 36 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 18.

Saturday Night

Mostly cloudy, with a low around 14.

Sunday

Partly sunny, with a high near 25.

Sunday Night

Mostly cloudy, with a low around 19.

Monday

Mostly cloudy, with a high near 30.

Monday Night

Mostly cloudy, with a low around 23.