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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

A Few Clouds

31°F

-1°C

Humidity 61%
Wind Speed NW 16 G 29 mph
Barometer 29.85 in (1011.8 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 9 Dec 6:53 pm MST
Extended Forecast for

Mount Rushmore SD

  • Tonight

    Tonight: A 20 percent chance of snow before 10pm. Increasing clouds, with a steady temperature around 31. Wind chill values as low as 19. Northwest wind 10 to 18 mph, with gusts as high as 34 mph.

    Low: 31 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of snow between 11am and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 45. West wind around 5 mph becoming calm. Winds could gust as high as 16 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly before 11pm. Partly cloudy, with a temperature rising to around 46 by 5am. West wind around 8 mph, with gusts as high as 21 mph.

    Low: 40 °F⇑

    Chance Rain

  • Thursday

    Thursday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 55. West wind around 7 mph, with gusts as high as 23 mph.

    High: 55 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely before 8pm, then rain and snow likely between 8pm and 10pm, then snow likely after 10pm. Mostly cloudy, with a low around 24. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 24 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Friday

    Friday: Snow likely. Mostly cloudy, with a temperature falling to around 20 by 5pm. Calm wind. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 27 °F⇓

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 12. Calm wind.

    Low: 12 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow before 11am. Partly sunny, with a high near 24. Calm wind.

    High: 24 °F

    Chance Snow
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of snow before 10pm. Increasing clouds, with a steady temperature around 31. Wind chill values as low as 19. Northwest wind 10 to 18 mph, with gusts as high as 34 mph.
Wednesday
A chance of snow between 11am and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 45. West wind around 5 mph becoming calm. Winds could gust as high as 16 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday Night
A 40 percent chance of rain, mainly before 11pm. Partly cloudy, with a temperature rising to around 46 by 5am. West wind around 8 mph, with gusts as high as 21 mph.
Thursday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 55. West wind around 7 mph, with gusts as high as 23 mph.
Thursday Night
Rain likely before 8pm, then rain and snow likely between 8pm and 10pm, then snow likely after 10pm. Mostly cloudy, with a low around 24. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow likely. Mostly cloudy, with a temperature falling to around 20 by 5pm. Calm wind. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 12. Calm wind.
Saturday
A chance of snow before 11am. Partly sunny, with a high near 24. Calm wind.
Saturday Night
Partly cloudy, with a low around 13.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
Mostly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
Last Update:
7:07 pm MST Dec 9, 2025
Forecast Valid:
7pm MST Dec 9, 2025-6pm MST Dec 16, 2025
 
Forecast Discussion
 
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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