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 >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

39°F

4°C

Humidity 65%
Wind Speed W 8 mph
Barometer 29.84 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 14 Apr 12:55 am MDT
Extended Forecast for

3 Miles WSW Lead SD

  • Overnight

    Overnight: Partly cloudy, with a low around 34. West wind around 8 mph, with gusts as high as 15 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers between noon and 2pm, then a chance of rain showers after 2pm.  Mostly cloudy, with a high near 50. West wind 5 to 7 mph becoming south in the afternoon. Winds could gust as high as 16 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 11pm, then gradually ending.  Mostly cloudy, then gradually becoming mostly clear, with a low around 34. Northwest wind 6 to 8 mph becoming southwest in the evening. Winds could gust as high as 16 mph.  Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 57. Southwest wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 57 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43. Southwest wind 7 to 17 mph, with gusts as high as 30 mph.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Showers likely after noon.  Increasing clouds, with a high near 58. Southwest wind 11 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph.  Chance of precipitation is 60%.

    High: 58 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Rain showers before 8pm, then snow showers.  Low around 21. North wind 13 to 17 mph, with gusts as high as 32 mph.  Chance of precipitation is 90%.

    Low: 21 °F

    Rain/Snow
    then Snow
    Showers

  • Friday

    Friday: Snow showers.  Mostly cloudy, with a high near 28. Northwest wind 15 to 17 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 18. Blustery.

    Low: 18 °F

    Chance Snow
    Showers and
    Blustery

Detailed Forecast

Overnight
Partly cloudy, with a low around 34. West wind around 8 mph, with gusts as high as 15 mph.
Tuesday
A chance of rain and snow showers between noon and 2pm, then a chance of rain showers after 2pm. Mostly cloudy, with a high near 50. West wind 5 to 7 mph becoming south in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of rain showers, mixing with snow after 11pm, then gradually ending. Mostly cloudy, then gradually becoming mostly clear, with a low around 34. Northwest wind 6 to 8 mph becoming southwest in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 57. Southwest wind 6 to 8 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 43. Southwest wind 7 to 17 mph, with gusts as high as 30 mph.
Thursday
Showers likely after noon. Increasing clouds, with a high near 58. Southwest wind 11 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
Rain showers before 8pm, then snow showers. Low around 21. North wind 13 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 90%.
Friday
Snow showers. Mostly cloudy, with a high near 28. Northwest wind 15 to 17 mph, with gusts as high as 33 mph.
Friday Night
A chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 18. Blustery.
Saturday
A chance of snow showers. Mostly sunny, with a high near 35.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Sunny, with a high near 53.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Lead SD
 44.35°N 103.83°W (Elev. 6112 ft)
12:32 am MDT Apr 14, 2026
1am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database