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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

37°F

3°C

Humidity 59%
Wind Speed W 12 G 24 mph
Barometer 29.61 in (1002.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 9 Dec 6:53 am MST
Extended Forecast for

4 Miles NNE Keystone SD

  • Today

    Today: A 50 percent chance of rain, mainly after 8am. Partly sunny, with a temperature rising to near 51 by 11am, then falling to around 36 during the remainder of the day. Breezy, with a west wind 13 to 22 mph, with gusts as high as 43 mph.

    High: 51 °F⇓

    Chance Rain
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Wind chill values as low as 19. Blustery, with a northwest wind 16 to 21 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 39 mph.

    Low: 27 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Snow likely before 3pm, then rain and snow likely between 3pm and 4pm, then rain likely after 4pm. Mostly cloudy, with a high near 45. West wind around 7 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 45 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34. West wind 7 to 9 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 50. Northwest wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 50 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain and snow likely, becoming all snow after 7pm. Mostly cloudy, with a low around 14. Northwest wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 14 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 21. Northeast wind around 6 mph becoming southeast in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 60%.

    High: 21 °F

    Snow Likely

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 9. Southeast wind around 5 mph becoming north after midnight.

    Low: 9 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow before 11am. Partly sunny, with a high near 23.

    High: 23 °F

    Chance Snow
    then Partly
    Sunny

Detailed Forecast

Today
A 50 percent chance of rain, mainly after 8am. Partly sunny, with a temperature rising to near 51 by 11am, then falling to around 36 during the remainder of the day. Breezy, with a west wind 13 to 22 mph, with gusts as high as 43 mph.
Tonight
Partly cloudy, with a low around 27. Wind chill values as low as 19. Blustery, with a northwest wind 16 to 21 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 39 mph.
Wednesday
Snow likely before 3pm, then rain and snow likely between 3pm and 4pm, then rain likely after 4pm. Mostly cloudy, with a high near 45. West wind around 7 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34. West wind 7 to 9 mph, with gusts as high as 25 mph.
Thursday
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 50. Northwest wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Thursday Night
Rain and snow likely, becoming all snow after 7pm. Mostly cloudy, with a low around 14. Northwest wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Friday
Snow likely. Mostly cloudy, with a high near 21. Northeast wind around 6 mph becoming southeast in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 9. Southeast wind around 5 mph becoming north after midnight.
Saturday
A chance of snow before 11am. Partly sunny, with a high near 23.
Saturday Night
Mostly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 46.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Keystone SD
 43.94°N 103.41°W (Elev. 4774 ft)
Last Update:
6:47 am MST Dec 9, 2025
Forecast Valid:
7am MST Dec 9, 2025-6pm MST Dec 15, 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