Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

30°F

-1°C

Humidity 85%
Wind Speed W 3 mph
Barometer 30.11 in (1021.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 18 May 10:53 pm MDT
Extended Forecast for

5 Miles ESE Edgemont SD

Freeze Warning May 19, 12:00am until May 19, 09:00am
Click here for hazard details and duration
Freeze Warning
  • Tonight

    Tonight: A 50 percent chance of showers before midnight.  Widespread frost after 4am.  Otherwise, partly cloudy, with a low around 31. Northwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 31 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Widespread frost before 8am.  Otherwise, sunny, with a high near 59. West wind 7 to 11 mph, with gusts as high as 23 mph.

    High: 59 °F

    Frost then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 35. West wind 5 to 7 mph becoming light and variable  after midnight. Winds could gust as high as 16 mph.

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 3pm.  Mostly sunny, with a high near 67. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 22 mph.  Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. South wind 5 to 14 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 68. South wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 68 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 65.

    High: 65 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 41.

    Low: 41 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A 50 percent chance of showers before midnight. Widespread frost after 4am. Otherwise, partly cloudy, with a low around 31. Northwest wind around 9 mph, with gusts as high as 18 mph.
Tuesday
Widespread frost before 8am. Otherwise, sunny, with a high near 59. West wind 7 to 11 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 35. West wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 16 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 3pm. Mostly sunny, with a high near 67. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 40. South wind 5 to 14 mph, with gusts as high as 22 mph.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. South wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.
Friday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 65.
Friday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Sunny, with a high near 85.
Sunday Night
Mostly clear, with a low around 49.
Memorial Day
Sunny, with a high near 88.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ESE Edgemont SD
 43.27°N 103.74°W (Elev. 3675 ft)
9:23 pm MDT May 18, 2026
11pm MDT May 18, 2026-6pm MDT May 25, 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