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

Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

N/A

Humidity NA
Wind Speed SE 12 mph
Barometer 29.87 in
Dewpoint N/A
Visibility 10.00 mi
Last update 13 Aug 1:35 pm CDT
Extended Forecast for

Reliance SD

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94. Breezy, with a south southeast wind 22 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    High: 94 °F

    Slight Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. Breezy, with a south southeast wind 18 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 50%.

    Low: 67 °F

    Chance
    T-storms and
    Breezy

  • Thursday

    Thursday: Sunny and hot, with a high near 95. South southeast wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 95 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. Southeast wind 10 to 13 mph.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 92. East wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 92 °F

    Hot

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. East northeast wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 90. East wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 90 °F

    Hot

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 68. East wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92. East wind 11 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94. Breezy, with a south southeast wind 22 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. Breezy, with a south southeast wind 18 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 50%.
Thursday
Sunny and hot, with a high near 95. South southeast wind 11 to 15 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 69. Southeast wind 10 to 13 mph.
Friday
Mostly sunny and hot, with a high near 92. East wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. East northeast wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny and hot, with a high near 90. East wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 68. East wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92. East wind 11 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Reliance SD
 43.88°N 99.6°W (Elev. 1781 ft)
Last Update:
1:47 pm CDT Aug 13, 2025
Forecast Valid:
1pm CDT Aug 13, 2025-6pm CDT Aug 19, 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