Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Wednesday

In the Upper Midwest, heavy to excessive rain may bring flash and urban flooding through Wednesday. Scattered severe thunderstorms capable of large hail and damaging wind gusts are possible from the central High Plains into the Upper Midwest Wednesday. Extreme heat is ongoing over the Desert Southwest through Thursday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Thunderstorm in Vicinity

69°F

21°C

Humidity 78%
Wind Speed NE 12 mph
Barometer 30.16 in (1015.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 7 Jul 7:53 pm MDT
Extended Forecast for

3 Miles NE Keystone SD

Severe T-storm Watch until July 7, 11:00pm
Click here for hazard details and duration
...
  •  
    Severe T-storm Watch until July 7, 11:00pm

    NOW until 11:00pm Tue

    Severe T-storm Watch

  • Tonight

    Low: 62 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 9am, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 80. Calm wind becoming northeast around 5 mph in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 50%.

    High: 80 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 60. West wind around 6 mph becoming calm  after midnight. Winds could gust as high as 20 mph.

    Low: 60 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 83. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 61. South wind around 6 mph becoming light and variable  after midnight. Winds could gust as high as 18 mph.

    Low: 61 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 87. Light and variable wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 22 mph.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before midnight. Some of the storms could be severe. Mostly cloudy, with a low around 62. Northwest wind 3 to 6 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Wednesday
A slight chance of showers and thunderstorms before 9am, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 80. Calm wind becoming northeast around 5 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 60. West wind around 6 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 83. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 61. South wind around 6 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Friday
Sunny, with a high near 87. Light and variable wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 22 mph.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Keystone SD
 43.92°N 103.38°W (Elev. 4416 ft)
8:38 pm MDT Jul 7, 2026
8pm MDT Jul 7, 2026-6pm MDT Jul 14, 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