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

7 Miles NNW Roslyn 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: 26 °F
Chance Snow
Christmas Day
High: 36 °F
Rain/Snow and
Patchy Fog
Thursday Night
Low: 27 °F
Chance
Rain/Snow and
Patchy Fog
then Chance
Snow
Friday
High: 34 °F
Snow
Friday Night
Low: 23 °F
Snow then
Chance Snow
Saturday
High: 29 °F
Partly Sunny
Saturday Night
Low: 20 °F
Mostly Cloudy
Sunday
High: 33 °F
Partly Sunny
Sunday Night
Low: 23 °F
Mostly Cloudy

Detailed Forecast

Overnight

A 30 percent chance of snow. Mostly cloudy, with a low around 26. Southeast wind around 6 mph, with gusts as high as 18 mph.

Christmas Day

Rain and snow, mainly before 4pm. Patchy fog after 4pm. High near 36. Southeast wind around 6 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday Night

A chance of rain and snow before 10pm, then a chance of snow. Patchy fog before 7pm. Otherwise, mostly cloudy, with a low around 27. Calm wind. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Friday

Snow, mainly after 7am. High near 34. Calm wind becoming southwest 5 to 8 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow, mainly before 10pm. Low around 23. West wind 8 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Saturday

Partly sunny, with a high near 29.

Saturday Night

Mostly cloudy, with a low around 20.

Sunday

Partly sunny, with a high near 33.

Sunday Night

Mostly cloudy, with a low around 23.

Monday

Mostly cloudy, with a high near 37.

Monday Night

Mostly cloudy, with a low around 27.