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 7 mph
Barometer 29.84 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 14 Apr 1:15 am MDT
Extended Forecast for

3 Miles S Whitewood SD

  • Overnight

    Overnight: Partly cloudy, with a low around 41. West wind around 10 mph, with gusts as high as 16 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 3pm.  Partly sunny, with a high near 58. West wind 6 to 9 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.

    High: 58 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 40. Southwest wind 6 to 9 mph.

    Low: 40 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63. West wind 6 to 9 mph becoming east in the afternoon. Winds could gust as high as 17 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. East wind 8 to 18 mph becoming southwest after midnight. Winds could gust as high as 28 mph.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers after noon.  Mostly sunny, with a high near 65. Breezy, with a southwest wind 17 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph.

    High: 65 °F

    Mostly Sunny
    and Breezy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 10pm, then rain and snow showers between 10pm and 1am, then snow showers after 1am.  Low around 28. Blustery, with a northwest wind 18 to 26 mph, with gusts as high as 36 mph.  Chance of precipitation is 90%.

    Low: 28 °F

    Rain/Snow and
    Blustery

  • Friday

    Friday: Snow showers likely, mainly before noon.  Mostly cloudy, with a high near 34. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 39 mph.

    High: 34 °F

    Snow Showers
    Likely and
    Windy

  • Friday Night

    Friday Night: A slight chance of snow showers before midnight.  Mostly cloudy, with a low around 24. Blustery.

    Low: 24 °F

    Slight Chance
    Snow Showers
    and Blustery
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 41. West wind around 10 mph, with gusts as high as 16 mph.
Tuesday
A 30 percent chance of showers, mainly after 3pm. Partly sunny, with a high near 58. West wind 6 to 9 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 40. Southwest wind 6 to 9 mph.
Wednesday
Sunny, with a high near 63. West wind 6 to 9 mph becoming east in the afternoon. Winds could gust as high as 17 mph.
Wednesday Night
Partly cloudy, with a low around 49. East wind 8 to 18 mph becoming southwest after midnight. Winds could gust as high as 28 mph.
Thursday
A 50 percent chance of showers after noon. Mostly sunny, with a high near 65. Breezy, with a southwest wind 17 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph.
Thursday Night
Rain showers before 10pm, then rain and snow showers between 10pm and 1am, then snow showers after 1am. Low around 28. Blustery, with a northwest wind 18 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 90%.
Friday
Snow showers likely, mainly before noon. Mostly cloudy, with a high near 34. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 39 mph.
Friday Night
A slight chance of snow showers before midnight. Mostly cloudy, with a low around 24. Blustery.
Saturday
A chance of snow showers, mainly after noon. Mostly sunny, with a high near 41. Breezy.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 38.
Monday
Sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Whitewood SD
 44.42°N 103.63°W (Elev. 4800 ft)
12:32 am MDT Apr 14, 2026
1am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database