Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

39°F

4°C

Humidity 56%
Wind Speed W 18 G 24 mph
Barometer 30.01 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 7 Dec 11:35 am MST
Extended Forecast for

4 Miles WSW Lead SD

  • Today

    Today: Mostly sunny, with a temperature falling to around 22 by 5pm. Wind chill values as low as 11. West wind around 11 mph, with gusts as high as 28 mph.

    High: 30 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 22. Wind chill values as low as 9. West wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 22 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33. Wind chill values as low as 12. West wind 11 to 14 mph, with gusts as high as 29 mph.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of snow after 11pm.  Mostly cloudy, with a temperature rising to around 32 by 5am. Wind chill values as low as 15. Breezy, with a southwest wind 13 to 21 mph, with gusts as high as 34 mph.

    Low: 27 °F

    Slight Chance
    Snow and
    Breezy

  • Tuesday

    Tuesday: A chance of rain and snow before 11am, then snow likely.  Mostly cloudy, with a temperature rising to near 37 by 10am, then falling to around 26 during the remainder of the day. Breezy, with a west wind 17 to 22 mph, with gusts as high as 40 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Breezy.
    Rain/Snow
    Likely then
    Snow Likely

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow.  Mostly cloudy, with a low around 20. Blustery, with a northwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 38 mph.  New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Chance Snow
    and Blustery

  • Wednesday

    Wednesday: Snow, mainly after 11am.  High near 31. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.  Chance of precipitation is 80%.

    High: 31 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow.  Mostly cloudy, with a low around 11. Northwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 11 °F

    Snow

  • Thursday

    Thursday: Snow likely, mainly before 11am.  Partly sunny, with a high near 17.

    High: 17 °F

    Snow Likely

Detailed Forecast

Today
Mostly sunny, with a temperature falling to around 22 by 5pm. Wind chill values as low as 11. West wind around 11 mph, with gusts as high as 28 mph.
Tonight
Partly cloudy, with a steady temperature around 22. Wind chill values as low as 9. West wind 10 to 13 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 33. Wind chill values as low as 12. West wind 11 to 14 mph, with gusts as high as 29 mph.
Monday Night
A 20 percent chance of snow after 11pm. Mostly cloudy, with a temperature rising to around 32 by 5am. Wind chill values as low as 15. Breezy, with a southwest wind 13 to 21 mph, with gusts as high as 34 mph.
Tuesday
A chance of rain and snow before 11am, then snow likely. Mostly cloudy, with a temperature rising to near 37 by 10am, then falling to around 26 during the remainder of the day. Breezy, with a west wind 17 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 20. Blustery, with a northwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 38 mph. New snow accumulation of less than a half inch possible.
Wednesday
Snow, mainly after 11am. High near 31. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Wednesday Night
Snow. Mostly cloudy, with a low around 11. Northwest wind around 14 mph, with gusts as high as 24 mph.
Thursday
Snow likely, mainly before 11am. Partly sunny, with a high near 17.
Thursday Night
A chance of snow. Mostly cloudy, with a low around -2.
Friday
A chance of snow. Mostly cloudy, with a high near 9.
Friday Night
A chance of snow. Mostly cloudy, with a low around 3.
Saturday
A slight chance of snow. Partly sunny, with a high near 27.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Lead SD
 44.33°N 103.83°W (Elev. 6398 ft)
9:17 am MST Dec 7, 2025
11am MST Dec 7, 2025-6pm MST Dec 13, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database