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

Thunderstorms and Heavy Rainfall from the Plains to the Mid-Atlantic

Severe thunderstorms producing damaging winds are most likely over parts of the Dakotas into Minnesota from this afternoon into the overnight, with other isolated storms producing hail or wind over the northern High Plains. In the Northern Plains into the Upper Great Lakes and Mid-Atlantic, heavy to excessive rain may bring flash and urban flooding through Wednesday. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair

72°F

22°C

Humidity 68%
Wind Speed Calm
Barometer 30.06 in (1015.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 7 Jul 9:52 am MDT
Extended Forecast for

Hermosa SD

  • Today

    Today: A 30 percent chance of showers and thunderstorms after 3pm. Some of the storms could be severe. Mostly sunny, with a high near 96. East wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 96 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Some of the storms could be severe. Mostly cloudy, with a low around 62. North wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    Low: 62 °F

    Severe
    Thunderstorms
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 84. North wind 6 to 8 mph, with gusts as high as 20 mph.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 59. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 86. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

    High: 86 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 59. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms after 3pm. Some of the storms could be severe. Mostly sunny, with a high near 96. East wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Tonight
Showers and thunderstorms likely, mainly before midnight. Some of the storms could be severe. Mostly cloudy, with a low around 62. North wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 84. North wind 6 to 8 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 59. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 86. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 59. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 40%.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny and hot, with a high near 102. Breezy.
Sunday Night
Mostly clear, with a low around 72. Breezy.
Monday
Sunny and hot, with a high near 102. Breezy.
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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:
8:33 am MDT Jul 7, 2026
Forecast Valid:
10am MDT Jul 7, 2026-6pm MDT Jul 13, 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