National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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 >

Current conditions at

Grand Coulee Dam Airport (K3W7)

Lat: 47.92205°NLon: 119.083°WElev: 1593.0ft.

light rain,mist

39°F

4°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.61 in (1002.71 mb)
Dewpoint 39°F (4°C)
Visibility 3.00 mi
Last update 25 Dec 04:15 PM PST
Extended Forecast for

Grand Coulee WA

  • Christmas Day

    Christmas Day: A 30 percent chance of rain. Cloudy, with a high near 43. Northeast wind around 6 mph becoming southeast. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Chance Rain

  • Tonight

    Tonight: A chance of rain before 7pm, then a chance of rain after 4am. Mostly cloudy, with a low around 35. Southwest wind around 6 mph becoming southeast after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Chance Rain

  • Friday

    Friday: Rain likely, possibly mixed with snow, mainly before 4pm. Mostly cloudy, with a high near 41. Southeast wind 7 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 41 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of snow before 10pm. Mostly cloudy, with a low around 26. Southwest wind 9 to 13 mph, with gusts as high as 22 mph. Little or no snow accumulation expected.

    Low: 26 °F

    Chance Snow
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 32. Northwest wind around 10 mph.

    High: 32 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 34.

    High: 34 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
A 30 percent chance of rain. Cloudy, with a high near 43. Northeast wind around 6 mph becoming southeast. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of rain before 7pm, then a chance of rain after 4am. Mostly cloudy, with a low around 35. Southwest wind around 6 mph becoming southeast after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely, possibly mixed with snow, mainly before 4pm. Mostly cloudy, with a high near 41. Southeast wind 7 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Friday Night
A 30 percent chance of snow before 10pm. Mostly cloudy, with a low around 26. Southwest wind 9 to 13 mph, with gusts as high as 22 mph. Little or no snow accumulation expected.
Saturday
Sunny, with a high near 32. Northwest wind around 10 mph.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 23.
Monday
Mostly cloudy, with a high near 34.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Mostly cloudy, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Cloudy, with a high near 38.
Wednesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
New Year's Day
A slight chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
3:48 pm PST Dec 25, 2025
Forecast Valid:
4pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation