Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Mostly Cloudy and Breezy

46°F

8°C

Humidity 43%
Wind Speed W 23 G 31 mph
Barometer 29.97 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 8 Dec 10:35 am MST
Extended Forecast for

4 Miles W Lead SD

  • Today

    Today: Mostly sunny, with a temperature falling to around 29 by 5pm. Wind chill values as low as 19. West wind around 14 mph, with gusts as high as 31 mph.

    High: 38 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of snow after 11pm.  Mostly cloudy, with a temperature rising to around 32 by 4am. Wind chill values as low as 17. Breezy, with a west wind 13 to 21 mph, with gusts as high as 30 mph.

    Low: 29 °F

    Chance Snow
    and Breezy

  • Tuesday

    Tuesday: Rain and snow likely, becoming all snow after 2pm.  Mostly cloudy, with a temperature rising to near 37 by 9am, then falling to around 27 during the remainder of the day. Wind chill values as low as 14. Breezy, with a west wind 18 to 23 mph, with gusts as high as 34 mph.  Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Rain/Snow
    Likely and
    Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow, mainly before 11pm.  Mostly cloudy, with a low around 21. Wind chill values as low as 9. Blustery, with a northwest wind 20 to 25 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 38 mph.

    Low: 21 °F

    Chance Snow
    and Blustery

  • Wednesday

    Wednesday: Snow.  High near 34. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow.  Low around 22. West wind 13 to 17 mph, with gusts as high as 31 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow

  • Thursday

    Thursday: Snow likely.  Mostly cloudy, with a high near 28. West wind 8 to 13 mph, with gusts as high as 26 mph.  Chance of precipitation is 70%.

    High: 28 °F

    Snow Likely

  • Thursday Night

    Thursday Night: Snow likely.  Cloudy, with a low around 4. Northwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 4 °F

    Snow Likely

  • Friday

    Friday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 13.

    High: 13 °F

    Snow Likely

Detailed Forecast

Today
Mostly sunny, with a temperature falling to around 29 by 5pm. Wind chill values as low as 19. West wind around 14 mph, with gusts as high as 31 mph.
Tonight
A 30 percent chance of snow after 11pm. Mostly cloudy, with a temperature rising to around 32 by 4am. Wind chill values as low as 17. Breezy, with a west wind 13 to 21 mph, with gusts as high as 30 mph.
Tuesday
Rain and snow likely, becoming all snow after 2pm. Mostly cloudy, with a temperature rising to near 37 by 9am, then falling to around 27 during the remainder of the day. Wind chill values as low as 14. Breezy, with a west wind 18 to 23 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Tuesday Night
A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 21. Wind chill values as low as 9. Blustery, with a northwest wind 20 to 25 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 38 mph.
Wednesday
Snow. High near 34. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow. Low around 22. West wind 13 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow likely. Mostly cloudy, with a high near 28. West wind 8 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Thursday Night
Snow likely. Cloudy, with a low around 4. Northwest wind around 10 mph, with gusts as high as 22 mph.
Friday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 13.
Friday Night
A chance of snow. Mostly cloudy, with a low around 6.
Saturday
A chance of snow. Partly sunny, with a high near 23.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 14.
Sunday
Mostly sunny, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Lead SD
 44.35°N 103.83°W (Elev. 6112 ft)
10:06 am MST Dec 8, 2025
10am MST Dec 8, 2025-6pm MST Dec 14, 2025
 
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