Heavy Rainfall and Flooding Concerns in the Southwest; Coastal Low to Impact the East Coast

Deep tropical moisture will lead to widespread showers and thunderstorms capable of producing flash flooding through early next week over the Southwest and Four Corners. A coastal storm is expected to develop off the southeast U.S. coast tonight and is expected to strengthen and bring flooding, dangerous rip currents, gusty winds and heavy rain up much of the East Coast through early next week. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

73°F

23°C

Humidity 34%
Wind Speed S 13 G 26 mph
Barometer 30.17 in (1020.6 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 10 Oct 2:52 pm MDT
Extended Forecast for

Hermosa SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. South wind 13 to 15 mph, with gusts as high as 30 mph.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 81. Breezy, with a south wind 14 to 20 mph, with gusts as high as 31 mph.

    High: 81 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. Southwest wind 11 to 16 mph, with gusts as high as 25 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers.  Sunny, with a high near 69. Breezy, with a southwest wind 18 to 24 mph becoming northwest in the afternoon. Winds could gust as high as 38 mph.

    High: 69 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32. North wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.

    Low: 32 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 55. Northwest wind 7 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. Southeast wind 6 to 11 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. South wind 13 to 15 mph, with gusts as high as 30 mph.
Saturday
Partly sunny, with a high near 81. Breezy, with a south wind 14 to 20 mph, with gusts as high as 31 mph.
Saturday Night
Partly cloudy, with a low around 55. Southwest wind 11 to 16 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers. Sunny, with a high near 69. Breezy, with a southwest wind 18 to 24 mph becoming northwest in the afternoon. Winds could gust as high as 38 mph.
Sunday Night
Mostly clear, with a low around 32. North wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.
Columbus Day
Sunny, with a high near 55. Northwest wind 7 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 38. Southeast wind 6 to 11 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 44.
Thursday
A slight chance of showers. Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Hermosa SD
 43.84°N 103.19°W (Elev. 3383 ft)
12:42 pm MDT Oct 10, 2025
3pm MDT Oct 10, 2025-6pm MDT Oct 17, 2025
 
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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