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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

39°F

4°C

Humidity 82%
Wind Speed S 3 mph
Barometer 29.95 in (1011.5 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 15 Nov 4:53 am MST
Extended Forecast for

Keystone SD

  • Today

    Today: Sunny, with a high near 60. West wind 3 to 6 mph.

    High: 60 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. Light west wind.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 58. Calm wind becoming southeast around 6 mph in the morning. Winds could gust as high as 18 mph.

    High: 58 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. Calm wind.

    Low: 40 °F

    Increasing
    Clouds

  • Monday

    Monday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 51. Light and variable wind becoming south around 5 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    High: 51 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 53. Calm wind becoming southeast around 5 mph. Winds could gust as high as 15 mph.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 11am. Partly sunny, with a high near 53.

    High: 53 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 60. West wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 39. Light west wind.
Sunday
Mostly sunny, with a high near 58. Calm wind becoming southeast around 6 mph in the morning. Winds could gust as high as 18 mph.
Sunday Night
Increasing clouds, with a low around 40. Calm wind.
Monday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 51. Light and variable wind becoming south around 5 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. Calm wind.
Tuesday
Partly sunny, with a high near 53. Calm wind becoming southeast around 5 mph. Winds could gust as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Calm wind.
Wednesday
A slight chance of rain after 11am. Partly sunny, with a high near 53.
Wednesday Night
A chance of rain before 4am, then a slight chance of rain and snow. Mostly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 46.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.89°N 103.43°W (Elev. 4541 ft)
Last Update:
3:32 am MST Nov 15, 2025
Forecast Valid:
5am MST Nov 15, 2025-6pm MST Nov 21, 2025
 
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