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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. 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

71°F

22°C

Humidity 66%
Wind Speed W 9 mph
Barometer 29.97 in (1011.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Aug 12:52 am MDT
Extended Forecast for

Wasta SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. Northeast wind around 5 mph.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Some of the storms could be severe. Partly sunny, with a high near 91. East wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Cloudy
    then Severe
    Thunderstorms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 66. Northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    High: 91 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65. East wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 92. Light northeast wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 64. East wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 64 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. Northeast wind around 5 mph.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Some of the storms could be severe. Partly sunny, with a high near 91. East wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 66. Northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65. East wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Monday
Mostly sunny, with a high near 92. Light northeast wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 64. East wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 94. East wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Sunny, with a high near 98.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wasta SD
 44.06°N 102.46°W (Elev. 2398 ft)
Last Update:
11:29 pm MDT Aug 15, 2025
Forecast Valid:
1am MDT Aug 16, 2025-6pm MDT Aug 22, 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