Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Southern Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over the Northern Mariana Islands. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes through Tuesday. Heavy snow is expected in the Pacific Northwest. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

36°F

2°C

Humidity 70%
Wind Speed Calm
Barometer 29.81 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Apr 3:35 am MDT
Extended Forecast for

4 Miles WSW Lead SD

  • Overnight

    Overnight: Partly cloudy, with a low around 33. Southwest wind around 7 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers before 1pm, then a chance of rain showers between 1pm and 2pm, then a chance of rain and snow showers after 2pm.  Mostly cloudy, with a high near 50. West wind 5 to 7 mph, with gusts as high as 15 mph.  Chance of precipitation is 30%.

    High: 50 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A slight chance of rain showers, mixing with snow after 7pm, then gradually ending.  Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Northwest wind 6 to 8 mph becoming southwest in the evening. Winds could gust as high as 15 mph.  Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 56. West wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41. Southwest wind 8 to 18 mph, with gusts as high as 29 mph.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Showers likely after noon.  Increasing clouds, with a high near 58. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph.  Chance of precipitation is 60%.

    High: 58 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Rain showers before 7pm, then rain and snow showers between 7pm and 8pm, then snow showers after 8pm.  Low around 20. North wind 14 to 17 mph, with gusts as high as 31 mph.  Chance of precipitation is 90%.

    Low: 20 °F

    Rain/Snow
    then Snow
    Showers

  • Friday

    Friday: Snow showers.  Mostly cloudy, with a high near 28. Northwest wind 16 to 18 mph, with gusts as high as 33 mph.

    High: 28 °F

    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers, mainly before midnight.  Mostly cloudy, with a low around 16.

    Low: 16 °F

    Chance Snow
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 33. Southwest wind around 7 mph.
Tuesday
A chance of rain and snow showers before 1pm, then a chance of rain showers between 1pm and 2pm, then a chance of rain and snow showers after 2pm. Mostly cloudy, with a high near 50. West wind 5 to 7 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of rain showers, mixing with snow after 7pm, then gradually ending. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Northwest wind 6 to 8 mph becoming southwest in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 56. West wind 6 to 8 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 41. Southwest wind 8 to 18 mph, with gusts as high as 29 mph.
Thursday
Showers likely after noon. Increasing clouds, with a high near 58. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 60%.
Thursday Night
Rain showers before 7pm, then rain and snow showers between 7pm and 8pm, then snow showers after 8pm. Low around 20. North wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.
Friday
Snow showers. Mostly cloudy, with a high near 28. Northwest wind 16 to 18 mph, with gusts as high as 33 mph.
Friday Night
A chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 16.
Saturday
A chance of snow showers. Mostly sunny, with a high near 34.
Saturday Night
Mostly clear, with a low around 22.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Lead SD
 44.33°N 103.83°W (Elev. 6398 ft)
12:32 am MDT Apr 14, 2026
3am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database