Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair

85°F

29°C

Humidity 42%
Wind Speed SE 7 mph
Barometer 30.08 in (1015.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 27 Aug 1:52 pm MDT
Extended Forecast for

Box Elder SD

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 90. Southeast wind 9 to 11 mph, with gusts as high as 23 mph.

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 63. Southeast wind 8 to 11 mph, with gusts as high as 24 mph.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 96. South wind 8 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 21 mph.

    High: 96 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 66. East wind around 8 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Low: 66 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 95. Northwest wind 8 to 11 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 63. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 90. Southeast wind 9 to 11 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around 63. Southeast wind 8 to 11 mph, with gusts as high as 24 mph.
Friday
Mostly sunny, with a high near 96. South wind 8 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 21 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. East wind around 8 mph becoming west after midnight. Winds could gust as high as 18 mph.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 95. Northwest wind 8 to 11 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Box Elder SD
 44.13°N 103.06°W (Elev. 3091 ft)
2:18 pm MDT Aug 27, 2026
2pm MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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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