Heavy Rainfall Threat for Portions of Mid-Atlantic and Northeast; Heat Linger for Southeast and Expands for the West

Moisture and nearby frontal boundary will focus more showers and thunderstorms for portions of the Mid-Atlantic and Northeast today. Rainfall could be locally heavy resulting instances of flash flooding. Meanwhile, the heat lingers for areas of the Southeast and expands across the Western U.S. the next several days. Between these areas, severe thunderstorms possible for the Plains and Midwest. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

A Few Clouds

74°F

23°C

Humidity 36%
Wind Speed NE 10 mph
Barometer 30.17 in (1013.3 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 6 Jul 8:53 am MDT
Extended Forecast for

6 Miles NNW Keystone SD

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 89. North wind 5 to 8 mph, with gusts as high as 26 mph.

    High: 89 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 9pm and 3am.  Mostly cloudy, with a low around 59. Northeast wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 22 mph.  Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after noon.  Mostly cloudy, with a high near 86. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 86 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am.  Mostly cloudy, with a low around 58. Light and variable wind. Winds could gust as high as 16 mph.  Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after noon.  Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph. Winds could gust as high as 16 mph.  Chance of precipitation is 70%.

    High: 82 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon.  High near 81. Chance of precipitation is 80%.

    High: 81 °F

    Chance
    Showers then
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. North wind 5 to 8 mph, with gusts as high as 26 mph.
Tonight
A slight chance of showers and thunderstorms between 9pm and 3am. Mostly cloudy, with a low around 59. Northeast wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 86. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 58. Light and variable wind. Winds could gust as high as 16 mph. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph. Winds could gust as high as 16 mph. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 55. Light and variable wind.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 81. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Keystone SD
 43.98°N 103.47°W (Elev. 4800 ft)
8:57 am MDT Jul 6, 2026
9am MDT Jul 6, 2026-6pm MDT Jul 12, 2026
 
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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