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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

46°F

8°C

Humidity 76%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 12 Nov 4:55 pm MST
Extended Forecast for

Lead SD

  • Tonight

    Tonight: Partly cloudy, with a low around 39. Light southwest wind.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 62. Light west wind. Winds could gust as high as 15 mph.

    High: 62 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a steady temperature around 48. Southwest wind 5 to 10 mph, with gusts as high as 23 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 65. Southwest wind 8 to 10 mph, with gusts as high as 28 mph.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. West wind 8 to 10 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50. Northwest wind 5 to 7 mph, with gusts as high as 21 mph.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. Light southwest wind.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 52. Southeast wind 3 to 5 mph. Winds could gust as high as 15 mph.

    High: 52 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 39. Light southwest wind.
Thursday
Sunny, with a high near 62. Light west wind. Winds could gust as high as 15 mph.
Thursday Night
Mostly clear, with a steady temperature around 48. Southwest wind 5 to 10 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 65. Southwest wind 8 to 10 mph, with gusts as high as 28 mph.
Friday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. West wind 8 to 10 mph, with gusts as high as 24 mph.
Saturday
Mostly sunny, with a high near 50. Northwest wind 5 to 7 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 34. Light southwest wind.
Sunday
Mostly sunny, with a high near 52. Southeast wind 3 to 5 mph. Winds could gust as high as 15 mph.
Sunday Night
A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 34.
Monday
Rain likely. Mostly cloudy, with a high near 41.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 26.
Tuesday
A chance of snow. Mostly cloudy, with a high near 37.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A chance of snow. Mostly cloudy, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.33°N 103.77°W (Elev. 5197 ft)
Last Update:
3:51 pm MST Nov 12, 2025
Forecast Valid:
5pm MST Nov 12, 2025-6pm MST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation