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

Thunderstorms and Heavy Rainfall in the Mid-Atlantic; Fire Weather Concerns in the West

Thunderstorms are expected to bring heavy rain and potential significant flash and urban flooding to the Mid-Atlantic on Thursday, especially along the I-95 urban corridor. Dry conditions, gusty winds, and isolated dry thunderstorms will continue to bring a critical fire weather threat to the northwestern Great Basin into the interior Northwest through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Partly Cloudy

66°F

19°C

Humidity 78%
Wind Speed E 8 mph
Barometer 30.30 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 30 Jul 9:55 pm MDT
Extended Forecast for

Lead SD

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind around 5 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 68. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 68 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 56. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 56 °F

    T-storms
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 75. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.

    Low: 56 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 78. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 56. East wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.

    High: 75 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind around 5 mph, with gusts as high as 15 mph.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 68. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 56. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 75. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Friday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.
Saturday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 78. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 40%.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 56. East wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55.
Monday
A chance of showers and thunderstorms after noon. Sunny, with a high near 78.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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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:
9:49 pm MDT Jul 30, 2025
Forecast Valid:
10pm MDT Jul 30, 2025-6pm MDT Aug 6, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation