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.

light snow,freezing fog

31°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	29.53 in (1000.0 mb)
Dewpoint	31°F (-1°C)
Visibility	0.25 mi
Last update	25 Dec 01:42 PM PST

More Information:

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

Extended Forecast for

13 Miles SE Skykomish 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: 27 °F
Snow
Tonight
Low: 20 °F
Snow Likely
then Slight
Chance Snow
Friday
High: 23 °F⇓
Heavy Snow
Friday Night
Low: 12 °F
Heavy Snow
and Breezy
Saturday
High: 16 °F
Chance Snow
then Partly
Sunny
Saturday Night
Low: 8 °F
Mostly Cloudy
Sunday
High: 22 °F
Partly Sunny
Sunday Night
Low: 14 °F
Mostly Cloudy
Monday
High: 27 °F
Mostly Cloudy

Detailed Forecast

Christmas Day

Snow. High near 27. South wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 3 inches possible.

Tonight

Snow likely before 10pm, then a slight chance of snow after 1am. Mostly cloudy, with a low around 20. South wind around 9 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

Friday

Snow, mainly after 7am. The snow could be heavy at times. Temperature rising to near 23 by 10am, then falling to around 17 during the remainder of the day. Wind chill values as low as -1. South wind 13 to 20 mph becoming west in the afternoon. Winds could gust as high as 33 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 12. Wind chill values as low as -6. Breezy, with a west wind 26 to 28 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

Saturday

A 30 percent chance of snow before 10am. Partly sunny, with a high near 16. Northwest wind 11 to 17 mph, with gusts as high as 25 mph.

Saturday Night

Mostly cloudy, with a low around 8.

Sunday

Partly sunny, with a high near 22.

Sunday Night

Mostly cloudy, with a low around 14.

Monday

Mostly cloudy, with a high near 27.

Monday Night

Mostly cloudy, with a low around 18.