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

Heat in the Central U.S.; Heavy Rain Possible for South Texas; Monitoring Erin Tropical Impacts

Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

59°F

15°C

Humidity 94%
Wind Speed W 5 mph
Barometer 29.99 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 15 Aug 4:55 am MDT
Extended Forecast for

Lead SD

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the morning. Winds could gust as high as 15 mph.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 58 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Sunny, with a high near 81. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 81 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. East wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 81. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 81 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the morning. Winds could gust as high as 15 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Sunny, with a high near 81. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. East wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 81. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.35°N 103.77°W (Elev. 5322 ft)
Last Update:
4:09 am MDT Aug 15, 2025
Forecast Valid:
5am MDT Aug 15, 2025-6pm MDT Aug 21, 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