Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

39°F

4°C

Humidity 60%
Wind Speed Calm
Barometer 29.82 in (1008.1 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 14 Apr 9:53 pm MDT
Extended Forecast for

6 Miles NNW Keystone SD

  • Tonight

    Tonight: Mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. Calm wind becoming southwest around 6 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. West wind 3 to 7 mph. Winds could gust as high as 24 mph.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of showers after noon.  Mostly sunny, with a high near 71. West wind 7 to 10 mph, with gusts as high as 31 mph.

    High: 71 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then snow showers likely after 1am.  Low around 26. North wind around 8 mph, with gusts as high as 26 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Rain/Snow

  • Friday

    Friday: Snow showers.  High near 38. North wind 7 to 11 mph, with gusts as high as 33 mph.  Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 38 °F

    Snow Showers

  • Friday Night

    Friday Night: A 20 percent chance of snow showers before midnight.  Mostly cloudy, with a low around 21. Northwest wind 8 to 11 mph, with gusts as high as 33 mph.

    Low: 21 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

  • Saturday

    Saturday: A chance of snow showers, mainly after noon.  Mostly sunny, with a high near 44. Northwest wind 8 to 11 mph, with gusts as high as 32 mph.

    High: 44 °F

    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 35. Calm wind.
Wednesday
Sunny, with a high near 69. Calm wind becoming southwest around 6 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 46. West wind 3 to 7 mph. Winds could gust as high as 24 mph.
Thursday
A 50 percent chance of showers after noon. Mostly sunny, with a high near 71. West wind 7 to 10 mph, with gusts as high as 31 mph.
Thursday Night
Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then snow showers likely after 1am. Low around 26. North wind around 8 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Snow showers. High near 38. North wind 7 to 11 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 21. Northwest wind 8 to 11 mph, with gusts as high as 33 mph.
Saturday
A chance of snow showers, mainly after noon. Mostly sunny, with a high near 44. Northwest wind 8 to 11 mph, with gusts as high as 32 mph.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Keystone SD
 43.98°N 103.47°W (Elev. 4800 ft)
9:37 pm MDT Apr 14, 2026
10pm MDT Apr 14, 2026-6pm MDT Apr 21, 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