Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Winter Weather Advisory in effect from December 23, 10:00 PM PST until December 24, 04:00 PM PST

Current conditions at

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

30°F

-1°C

Humidity	94%
Wind Speed	NNW 2 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Last update	24 Dec 12:06 AM PST

More Information:

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

Extended Forecast for

4 Miles W Winthrop WA

Winter Weather Advisory until December 24, 04:00pm

Click here for hazard details and duration

Winter Weather Advisory

Winter Weather Advisory until December 24, 04:00pm
NOW until 4:00pm Wed
Winter Weather Advisory
Overnight
Low: 29 °F
Snow and
Patchy
Freezing Fog
Wednesday
High: 35 °F
Rain/Snow and
Patchy
Freezing Fog
then Rain
Wednesday Night
Low: 22 °F
Partly Cloudy
Christmas Day
High: 32 °F
Chance Snow
then
Rain/Snow
Likely
Thursday Night
Low: 23 °F
Rain Likely
then Chance
Rain/Snow
Friday
High: 31 °F
Snow Likely
Friday Night
Low: 17 °F
Chance Snow
then Partly
Cloudy
Saturday
High: 24 °F
Mostly Sunny

Detailed Forecast

Overnight

Snow. Patchy freezing fog between 4am and 5am. Steady temperature around 29. Calm wind. Chance of precipitation is 80%. Total nighttime snow accumulation of around an inch possible.

Wednesday

Rain and snow, becoming all rain after noon. Patchy freezing fog between 8am and 9am. High near 35. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

Wednesday Night

Partly cloudy, with a low around 22. Light west wind.

Christmas Day

A chance of snow before 1pm, then rain likely, possibly mixed with snow. Mostly cloudy, with a high near 32. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Thursday Night

Rain likely before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 23. Calm wind. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Friday

Snow likely, mainly between 10am and 4pm. Partly sunny, with a high near 31. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Friday Night

A 30 percent chance of snow before 10pm. Partly cloudy, with a low around 17. New snow accumulation of less than a half inch possible.

Saturday

Mostly sunny, with a high near 24.

Saturday Night

Mostly cloudy, with a low around 16.

Sunday

Partly sunny, with a high near 27.

Sunday Night

Mostly cloudy, with a low around 20.

Monday

Mostly cloudy, with a high near 30.