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

Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

43°F

6°C

Humidity 86%
Wind Speed E 7 mph
Barometer 30.06 in (1016.5 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 20 May 7:53 pm MDT
Extended Forecast for

Edgemont SD

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Southeast wind 9 to 14 mph becoming light east after midnight. Winds could gust as high as 26 mph.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Scattered showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 69. Calm wind becoming northwest 5 to 8 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 70%.

    High: 69 °F

    Mostly Cloudy
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 41. West wind 5 to 15 mph becoming east in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    Low: 41 °F

    Showers

  • Friday

    Friday: A 40 percent chance of rain, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 62. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 36 mph.

    High: 62 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39. Northwest wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 26 mph.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. Southeast wind 9 to 14 mph becoming light east after midnight. Winds could gust as high as 26 mph.
Thursday
Scattered showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 69. Calm wind becoming northwest 5 to 8 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Low around 41. West wind 5 to 15 mph becoming east in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Friday
A 40 percent chance of rain, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 62. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 36 mph.
Friday Night
Partly cloudy, with a low around 39. Northwest wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 26 mph.
Saturday
Sunny, with a high near 75. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 49.
Memorial Day
Sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 51. Breezy.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Edgemont SD
 43.29°N 103.83°W (Elev. 3589 ft)
Last Update:
7:36 pm MDT May 20, 2026
Forecast Valid:
8pm MDT May 20, 2026-6pm MDT May 27, 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