Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

Grand Coulee Dam Airport (K3W7)

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

Clear

30°F

-1°C

Humidity 63%
Wind Speed N 0 MPH
Barometer 30.34 in (1027.43 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 14 Mar 11:15 PM PDT
Extended Forecast for

Grand Coulee WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. North wind around 6 mph becoming calm  after midnight.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 45. Calm wind becoming south 5 to 8 mph in the morning.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of snow before 2am, then a slight chance of rain and snow.  Cloudy, with a low around 36. Southeast wind around 6 mph.  Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 36 °F

    Chance Snow
    then Slight
    Chance
    Rain/Snow

  • Monday

    Monday: Mostly cloudy, with a high near 56. South wind 6 to 8 mph.

    High: 56 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind around 9 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain.  Mostly cloudy, with a high near 66.

    High: 66 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain.  Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 29. North wind around 6 mph becoming calm after midnight.
Sunday
Mostly cloudy, with a high near 45. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
A chance of snow before 2am, then a slight chance of rain and snow. Cloudy, with a low around 36. Southeast wind around 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday
Mostly cloudy, with a high near 56. South wind 6 to 8 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 9 mph.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 48.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 66.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 49.
Thursday
A 30 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 68.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 49.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 70.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 49.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
10:16 pm PDT Mar 14, 2026
11pm PDT Mar 14, 2026-6pm PDT Mar 21, 2026
 
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