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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair

87°F

31°C

Humidity 46%
Wind Speed Vrbl 3 mph
Barometer 29.96 in (1011.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 17 Aug 11:52 am MDT
Extended Forecast for

Colonial Pine Hills SD

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny early, then becoming partly sunny, with a high near 83. Northeast wind around 5 mph becoming southwest. Winds could gust as high as 15 mph.

    High: 83 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 63. Northwest wind around 5 mph becoming southwest in the evening. Winds could gust as high as 15 mph.

    Low: 63 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after noon. Sunny, with a high near 84. West wind around 5 mph becoming east in the morning. Winds could gust as high as 20 mph.

    High: 84 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East wind around 5 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. West wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 20 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. East wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny early, then becoming partly sunny, with a high near 83. Northeast wind around 5 mph becoming southwest. Winds could gust as high as 15 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 63. Northwest wind around 5 mph becoming southwest in the evening. Winds could gust as high as 15 mph.
Monday
A 40 percent chance of showers and thunderstorms after noon. Sunny, with a high near 84. West wind around 5 mph becoming east in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 63. East wind around 5 mph becoming west after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 86. West wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 66. East wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Wednesday
Sunny, with a high near 91. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 70. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Thursday
Sunny, with a high near 89.
Thursday Night
A chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colonial Pine Hills SD
 44.01°N 103.32°W (Elev. 4134 ft)
Last Update:
11:30 am MDT Aug 17, 2025
Forecast Valid:
12pm MDT Aug 17, 2025-6pm MDT Aug 23, 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