National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

49°F

9°C

Humidity 28%
Wind Speed W 10 mph
Barometer 30.17 in (1022.0 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 19 May 3:53 pm MDT
Extended Forecast for

Hot Springs SD

Frost Advisory May 20, 12:00am until May 20, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 36. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 36 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 67. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 30%.

    High: 67 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41. Southeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 24 mph.

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly after 3pm. Partly sunny, with a high near 69. Light east wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

    High: 69 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 43. East wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 65. Light northwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 36. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Wednesday
A chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 67. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 41. Southeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 24 mph.
Thursday
Showers likely and possibly a thunderstorm, mainly after 3pm. Partly sunny, with a high near 69. Light east wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm. Low around 43. East wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Friday
Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 65. Light northwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 53.
Memorial Day
Sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hot Springs SD
 43.44°N 103.48°W (Elev. 3599 ft)
Last Update:
2:21 pm MDT May 19, 2026
Forecast Valid:
4pm MDT May 19, 2026-6pm MDT May 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation