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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Coulee Dam Airport (K3W7)

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

Overcast

30°F

-1°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 01 Jan 09:55 PM PST
Extended Forecast for

Grand Coulee WA

Winter Weather Advisory January 1, 10:25pm until January 2, 07:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 1, 10:25pm until January 2, 07:00am

    NOW until 7:00am Fri

    Winter Weather Advisory

  • Tonight

    Low: 28 °F

    Slight Chance
    Snow then
    Chance Wintry
    Mix

  • Friday

    Friday: A chance of snow and freezing rain before 4pm, then a slight chance of rain and snow between 4pm and 5pm, then a slight chance of rain after 5pm. Mostly cloudy, with a high near 36. Calm wind. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 36 °F

    Chance Wintry
    Mix then
    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of rain and snow before 10pm, then a chance of rain. Cloudy, with a low around 35. Northeast wind 3 to 5 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 35 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Saturday

    Saturday: Rain, mainly before 4pm. High near 39. Southeast wind 6 to 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 39 °F

    Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 39. East wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Rain Likely

  • Sunday

    Sunday: A 40 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    Rain

  • Monday

    Monday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Tonight
A slight chance of snow and freezing rain before 3am, then a chance of freezing rain between 3am and 5am, then a chance of snow and freezing rain after 5am. Cloudy, with a low around 28. Light east wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Friday
A chance of snow and freezing rain before 4pm, then a slight chance of rain and snow between 4pm and 5pm, then a slight chance of rain after 5pm. Mostly cloudy, with a high near 36. Calm wind. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday Night
A slight chance of rain and snow before 10pm, then a chance of rain. Cloudy, with a low around 35. Northeast wind 3 to 5 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday
Rain, mainly before 4pm. High near 39. Southeast wind 6 to 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain likely, mainly between 10pm and 4am. Mostly cloudy, with a low around 39. East wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A 40 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 47.
Sunday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 43.
Monday Night
A slight chance of rain and snow after 4am. Mostly cloudy, with a low around 33. Chance of precipitation is 10%.
Tuesday
A chance of rain and snow, mainly after 10am. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 40. Chance of precipitation is 30%.
Wednesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 39.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
8:58 pm PST Jan 1, 2026
Forecast Valid:
10pm PST Jan 1, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation