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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

A Few Clouds

77°F

25°C

Humidity 52%
Wind Speed N 20 G 25 mph
Barometer 29.91 in (1009.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 8 Aug 12:52 pm MDT
Extended Forecast for

Hermosa SD

  • This Afternoon

    This Afternoon: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 80. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Mostly clear, with a low around 55. North wind 5 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 55 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Northwest wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. Northeast wind around 5 mph becoming west after midnight.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 84. West wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 20 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. Northeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 80. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Tonight
A 20 percent chance of showers before midnight. Mostly clear, with a low around 55. North wind 5 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.
Saturday
Sunny, with a high near 82. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 57. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Northwest wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
Mostly clear, with a low around 59. Northeast wind around 5 mph becoming west after midnight.
Monday
Mostly sunny, with a high near 84. West wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 60. Northeast wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 89.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hermosa SD
 43.84°N 103.19°W (Elev. 3383 ft)
Last Update:
12:49 pm MDT Aug 8, 2025
Forecast Valid:
1pm MDT Aug 8, 2025-6pm MDT Aug 14, 2025
 
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