Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Partly Cloudy

70°F

21°C

Humidity 41%
Wind Speed W 12 G 24 mph
Barometer 30.08 in (1009.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 Jul 1:53 am MDT
Extended Forecast for

3 Miles NE Keystone SD

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 5am.  Mostly cloudy, with a low around 63. North wind 5 to 10 mph becoming west. Winds could gust as high as 25 mph.

    Low: 63 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 70. West wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 30 mph.

    High: 70 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am.  Patchy fog after midnight. Low around 53. North wind 5 to 10 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%.

    Low: 53 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm.  Areas of fog before 10am. High near 55. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%.

    High: 55 °F

    Showers and
    Areas Fog

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 48. Northeast wind around 5 mph becoming south after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 40%.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 74. South wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 74 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 60. Southeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 60 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82. West wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 5am. Mostly cloudy, with a low around 63. North wind 5 to 10 mph becoming west. Winds could gust as high as 25 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 70. West wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 30 mph.
Tuesday Night
Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Patchy fog after midnight. Low around 53. North wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Areas of fog before 10am. High near 55. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 48. Northeast wind around 5 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 74. South wind 5 to 10 mph, with gusts as high as 25 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 60. Southeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 25 mph.
Friday
Mostly sunny, with a high near 82. West wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 80.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Keystone SD
 43.92°N 103.38°W (Elev. 4416 ft)
2:29 am MDT Jul 15, 2025
2am MDT Jul 15, 2025-6pm MDT Jul 21, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database