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

Heavy to Excessive Rainfall for the Southwest U.S.; Watching for Possible East Coast Storm

Thunderstorms and a chance for some isolated flash flooding will continue today in the Southwest U.S. before an influx of tropical moisture from Priscilla brings widespread heavy rainfall and a flash flooding threat late this week into this weekend. A coastal storm may develop off the southeast U.S. coast Friday night and drift north just off the Mid-Atlantic coast through the weekend. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

64°F

18°C

Humidity 28%
Wind Speed SW 13 G 30 mph
Barometer 30.10 in (1016.2 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 8 Oct 11:53 am MDT
Extended Forecast for

Mount Rushmore SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 71. Southwest wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. Southwest wind 6 to 8 mph, with gusts as high as 16 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. West wind 5 to 7 mph becoming calm in the morning. Winds could gust as high as 15 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers after noon. Partly sunny, with a high near 67. Calm wind becoming southeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 67 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 55. South wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Low: 55 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 75. South wind 3 to 7 mph. Winds could gust as high as 17 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54. Southwest wind 3 to 7 mph. Winds could gust as high as 21 mph.

    Low: 54 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers, mainly after noon. Mostly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 71. Southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Tonight
Mostly clear, with a low around 52. Southwest wind 6 to 8 mph, with gusts as high as 16 mph.
Thursday
Sunny, with a high near 74. West wind 5 to 7 mph becoming calm in the morning. Winds could gust as high as 15 mph.
Thursday Night
Mostly clear, with a low around 50. Calm wind.
Friday
A 20 percent chance of showers after noon. Partly sunny, with a high near 67. Calm wind becoming southeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55. South wind 3 to 7 mph. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 75. South wind 3 to 7 mph. Winds could gust as high as 17 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54. Southwest wind 3 to 7 mph. Winds could gust as high as 21 mph.
Sunday
A chance of showers, mainly after noon. Mostly sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 41.
Columbus Day
Mostly sunny, with a high near 56.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 44.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
Last Update:
9:21 am MDT Oct 8, 2025
Forecast Valid:
12pm MDT Oct 8, 2025-6pm MDT Oct 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation