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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Fair

59°F

15°C

Humidity 59%
Wind Speed SW 9 mph
Barometer 30.27 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 16 Sep 8:35 pm MDT
Extended Forecast for

Lead SD

  • Tonight

    Tonight: Increasing clouds, with a low around 50. Calm wind.

    Low: 50 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 70. Calm wind becoming southeast 5 to 8 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

    High: 70 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Southeast wind around 6 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

    Low: 52 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 74 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 49. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after noon. High near 66. Calm wind becoming north around 5 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 90%.

    High: 66 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 61.

    High: 61 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 50. Calm wind.
Thursday
A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 70. Calm wind becoming southeast 5 to 8 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Southeast wind around 6 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Winds could gust as high as 16 mph.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 49. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 80%.
Saturday
Showers, with thunderstorms also possible after noon. High near 66. Calm wind becoming north around 5 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 90%.
Saturday Night
Showers and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.
Sunday
Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 61.
Sunday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 46.
Monday
Showers likely, mainly after noon. Mostly sunny, with a high near 64.
Monday Night
A slight chance of showers. Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.35°N 103.77°W (Elev. 5322 ft)
Last Update:
8:41 pm MDT Sep 16, 2026
Forecast Valid:
8pm MDT Sep 16, 2026-6pm MDT Sep 23, 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