Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Overcast

63°F

17°C

Humidity 93%
Wind Speed N 12 mph
Barometer 30.00 in (1013.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 12 Aug 11:52 pm MDT
Extended Forecast for

Hermosa SD

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 2am, then areas of drizzle and thunderstorms after 2am.  Patchy fog.  Otherwise, mostly cloudy, with a steady temperature around 62. North wind 5 to 9 mph, with gusts as high as 18 mph.  Chance of precipitation is 70%.

    Low: 62 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon.  Areas of fog before 11am.  Otherwise, mostly cloudy, with a high near 71. Northeast wind 6 to 10 mph becoming east in the afternoon. Winds could gust as high as 21 mph.  Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers and
    Areas Fog

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before midnight, then showers and possibly a thunderstorm between midnight and 3am, then a chance of showers and thunderstorms after 3am.  Low around 57. East wind 5 to 10 mph becoming light south  after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 80%.

    Low: 57 °F

    T-storms
    Likely then
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 81 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 58. Northeast wind 7 to 10 mph becoming north in the evening. Winds could gust as high as 22 mph.  Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 75. North wind 7 to 11 mph, with gusts as high as 22 mph.  Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 56. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 2am, then areas of drizzle and thunderstorms after 2am. Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 62. North wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Thursday
A chance of showers, with thunderstorms also possible after noon. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 71. Northeast wind 6 to 10 mph becoming east in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Thursday Night
Showers and thunderstorms likely before midnight, then showers and possibly a thunderstorm between midnight and 3am, then a chance of showers and thunderstorms after 3am. Low around 57. East wind 5 to 10 mph becoming light south after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 22 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Northeast wind 7 to 10 mph becoming north in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 50%.
Saturday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75. North wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 83.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Wednesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Hermosa SD
 43.84°N 103.19°W (Elev. 3383 ft)
12:31 am MDT Aug 13, 2026
12am MDT Aug 13, 2026-6pm MDT Aug 19, 2026
 
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Additional Resources

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