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

Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies; Heavy Rain in Guam

A storm system moving over the Rockies today will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Heavy snow expected from northwestern Wyoming into southern Montana. Ongoing heavy showers and thunderstorms from Invest 96W could result in localized flash flooding, particularly in central or southern Guam early this morning. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

48°F

9°C

Humidity 100%
Wind Speed NE 8 mph
Barometer 30.09 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 15 Oct 11:15 am MDT
Extended Forecast for

Lead SD

  • Today

    Today: Areas of drizzle and fog with a slight chance of showers. Cloudy, with a high near 56. Southeast wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 56 °F

    Areas Drizzle
    and Areas Fog

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 9pm, then showers and possibly a thunderstorm between 9pm and 3am, then a chance of showers and thunderstorms after 3am. Areas of fog before 3am. Low around 41. Calm wind becoming west 5 to 7 mph after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 90%.

    Low: 41 °F

    Showers and
    Areas Fog

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 3pm. High near 50. West wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 50 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a steady temperature around 38. West wind 9 to 14 mph, with gusts as high as 29 mph.

    Low: 38 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 51. Northwest wind 11 to 14 mph, with gusts as high as 29 mph.

    High: 51 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of rain showers before midnight, then a chance of rain and snow showers between midnight and 4am, then a chance of snow showers after 4am. Mostly cloudy, with a low around 31. West wind 10 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 31 °F

    Slight Chance
    Showers then
    Chance
    Rain/Snow

  • Saturday

    Saturday: A 30 percent chance of snow showers before noon. Mostly sunny, with a high near 43. Northwest wind 9 to 16 mph, with gusts as high as 31 mph.

    High: 43 °F

    Chance Snow
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Northwest wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

Today
Areas of drizzle and fog with a slight chance of showers. Cloudy, with a high near 56. Southeast wind 6 to 8 mph, with gusts as high as 18 mph.
Tonight
A slight chance of showers and thunderstorms before 9pm, then showers and possibly a thunderstorm between 9pm and 3am, then a chance of showers and thunderstorms after 3am. Areas of fog before 3am. Low around 41. Calm wind becoming west 5 to 7 mph after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 90%.
Thursday
Showers, with thunderstorms also possible after 3pm. High near 50. West wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a steady temperature around 38. West wind 9 to 14 mph, with gusts as high as 29 mph.
Friday
Mostly sunny, with a high near 51. Northwest wind 11 to 14 mph, with gusts as high as 29 mph.
Friday Night
A slight chance of rain showers before midnight, then a chance of rain and snow showers between midnight and 4am, then a chance of snow showers after 4am. Mostly cloudy, with a low around 31. West wind 10 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday
A 30 percent chance of snow showers before noon. Mostly sunny, with a high near 43. Northwest wind 9 to 16 mph, with gusts as high as 31 mph.
Saturday Night
Mostly clear, with a low around 31. Northwest wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 60.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 39.
Monday
A chance of showers. Mostly sunny, with a high near 52.
Monday Night
A chance of rain and snow showers. Partly cloudy, with a low around 31.
Tuesday
A slight chance of rain and snow showers. Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.35°N 103.8°W (Elev. 5545 ft)
Last Update:
10:52 am MDT Oct 15, 2025
Forecast Valid:
11am MDT Oct 15, 2025-6pm MDT Oct 21, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation