Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

58°F

14°C

Humidity 46%
Wind Speed NW 13 G 21 mph
Barometer 29.76 in (1000.6 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 17 Jun 7:53 am MDT
Extended Forecast for

5 Miles E Custer SD

Red Flag Warning June 17, 11:00am until June 17, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  • Today

    Today: Sunny, with a high near 69. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 38 mph.

    High: 69 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Northwest wind 10 to 15 mph becoming light west  after midnight. Winds could gust as high as 29 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 69. Calm wind becoming northwest around 6 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47. Light and variable wind. Winds could gust as high as 15 mph.

    Low: 47 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 74. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 50. East wind 5 to 8 mph becoming calm  in the evening. Winds could gust as high as 21 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 72. Chance of precipitation is 70%.

    High: 72 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm.  Mostly cloudy, with a high near 64.

    High: 64 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 69. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 38 mph.
Tonight
Partly cloudy, with a low around 47. Northwest wind 10 to 15 mph becoming light west after midnight. Winds could gust as high as 29 mph.
Thursday
Mostly sunny, with a high near 69. Calm wind becoming northwest around 6 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 47. Light and variable wind. Winds could gust as high as 15 mph.
Juneteenth
Mostly sunny, with a high near 74. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Increasing clouds, with a low around 50. East wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph.
Saturday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 51.
Sunday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 64.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 67.
Monday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 47.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 70.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Custer SD
 43.76°N 103.51°W (Elev. 5249 ft)
7:27 am MDT Jun 17, 2026
8am MDT Jun 17, 2026-6pm MDT Jun 23, 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