Threats For Heavy Rain and Severe Thunderstorms Continue in the Plains; Fire Weather Conditions Worsen in the Southwest

On Monday and Tuesday, the focus for heavy rain and severe thunderstorms will continue in the Plains and central Mississippi River Valley. Meanwhile, hot conditions and Critical Fire Weather looms over the Great Basin and Southwest U.S. through midweek. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

63°F

17°C

Humidity 48%
Wind Speed W 9 mph
Barometer 29.94 in (1006.5 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 15 Jun 9:53 pm MDT
Extended Forecast for

2 Miles ESE Keystone SD

Severe T-storm Watch June 15, 10:27pm until June 16, 01:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch June 15, 10:27pm until June 16, 01:00am

    NOW until 1:00am Mon

    Severe T-storm Watch

  • Tonight

    Low: 60 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon. Some of the storms could be severe.  Increasing clouds, with a high near 78. North wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 78 °F

    Sunny then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Some of the storms could be severe.  Low around 57. Northeast wind around 5 mph becoming calm  after midnight. Winds could gust as high as 15 mph.  Chance of precipitation is 90%.

    Low: 57 °F

    Severe
    Thunderstorms
    then Showers

  • Tuesday

    Tuesday: Showers likely, then showers and possibly a thunderstorm after 9am. Some of the storms could produce heavy rainfall.  High near 68. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 15 mph.  Chance of precipitation is 90%.

    High: 68 °F

    Showers
    Likely then
    Heavy Rain

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers.  Cloudy during the early evening, then gradual clearing, with a low around 53. Northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 77. West wind around 5 mph becoming north in the afternoon. Winds could gust as high as 15 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm.

    Low: 57 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 87. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 87 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms between 11pm and midnight, then a slight chance of showers. Some of the storms could be severe. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northwest wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers and thunderstorms after noon. Some of the storms could be severe. Increasing clouds, with a high near 78. North wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 57. Northeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 90%.
Tuesday
Showers likely, then showers and possibly a thunderstorm after 9am. Some of the storms could produce heavy rainfall. High near 68. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Cloudy during the early evening, then gradual clearing, with a low around 53. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
Sunny, with a high near 77. West wind around 5 mph becoming north in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm.
Juneteenth
Sunny, with a high near 87. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 88.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Keystone SD
 43.9°N 103.37°W (Elev. 4199 ft)
8:30 pm MDT Jun 15, 2025
10pm MDT Jun 15, 2025-6pm MDT Jun 22, 2025
 
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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