Coastal and Marine Impacts from Imelda and Humberto as Both Track Away from the Southeast U.S.

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine and rip current conditions to the east coast of Florida and Georgia today, spreading north along much of the east coast of the U.S. this week. Heavy rainfall north and west of Imelda falling across coastal Florida and Georgia into the Carolinas could cause isolated flash and urban flooding through Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

72°F

22°C

Humidity 65%
Wind Speed E 9 mph
Barometer 30.00 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 29 Sep 3:15 pm MDT
Extended Forecast for

Lead SD

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 77. Southeast wind around 6 mph.

    High: 77 °F

    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 57. South wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 77. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55. South wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73. Southwest wind 5 to 9 mph becoming light and variable  in the afternoon. Winds could gust as high as 21 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. Calm wind becoming southwest 5 to 7 mph after midnight. Winds could gust as high as 17 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. Southwest wind 5 to 7 mph, with gusts as high as 17 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 51. Light and variable wind becoming south around 5 mph after midnight.

    Low: 51 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers after noon.  Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 77. Southeast wind around 6 mph.
Tonight
Partly cloudy, with a low around 57. South wind 5 to 8 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 77. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 55. South wind 7 to 10 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 73. Southwest wind 5 to 9 mph becoming light and variable in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 55. Calm wind becoming southwest 5 to 7 mph after midnight. Winds could gust as high as 17 mph.
Thursday
Sunny, with a high near 77. Southwest wind 5 to 7 mph, with gusts as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 51. Light and variable wind becoming south around 5 mph after midnight.
Friday
A chance of showers after noon. Partly sunny, with a high near 65.
Friday Night
A chance of showers. Mostly cloudy, with a low around 43.
Saturday
A slight chance of showers. Mostly sunny, with a high near 62.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41.
Sunday
A chance of showers. Partly sunny, with a high near 52.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 36.
Monday
A chance of showers. Mostly cloudy, with a high near 48.
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ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.35°N 103.77°W (Elev. 5322 ft)
1:56 pm MDT Sep 29, 2025
3pm MDT Sep 29, 2025-6pm MDT Oct 6, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database