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

3 Miles NE Keystone SD

  • Today

    Today: A 40 percent chance of rain, mainly after 8am. Partly sunny, with a temperature rising to near 52 by 10am, then falling to around 39 during the remainder of the day. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 44 mph.

    High: 52 °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 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 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 5 to 8 mph becoming south in the morning. 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 temperature rising to around 42 by 9pm. Northwest wind 7 to 9 mph, with gusts as high as 24 mph.

    Low: 39 °F⇑

    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 50. Northwest wind 7 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 50 °F

    Chance Rain
    then 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 less than one 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 east 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. Cloudy, with a low around 9. Southeast wind around 5 mph becoming north after midnight.

    Low: 9 °F

    Chance Snow

  • Saturday

    Saturday: A slight chance of snow before 11am. Partly sunny, with a high near 22.

    High: 22 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

Today
A 40 percent chance of rain, mainly after 8am. Partly sunny, with a temperature rising to near 52 by 10am, then falling to around 39 during the remainder of the day. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 44 mph.
Tonight
Partly cloudy, with a low around 27. Wind chill values as low as 19. Blustery, with a northwest wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 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 5 to 8 mph becoming south in the morning. 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 temperature rising to around 42 by 9pm. Northwest wind 7 to 9 mph, with gusts as high as 24 mph.
Thursday
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 50. Northwest wind 7 to 10 mph, with gusts as high as 25 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 less than one inch possible.
Friday
Snow likely. Mostly cloudy, with a high near 21. Northeast wind around 6 mph becoming east in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Friday Night
A chance of snow. Cloudy, with a low around 9. Southeast wind around 5 mph becoming north after midnight.
Saturday
A slight chance of snow before 11am. Partly sunny, with a high near 22.
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 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Keystone SD
 43.92°N 103.38°W (Elev. 4416 ft)
Last Update:
6:47 am MST Dec 9, 2025
Forecast Valid:
7am MST Dec 9, 2025-6pm MST Dec 15, 2025
 
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Additional Resources

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Chance of Precipitation