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

30°F

-1°C

Humidity 85%
Wind Speed NW 5 mph
Barometer 29.78 in (1007.8 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 15 Apr 2:53 am MDT
Extended Forecast for

Mount Rushmore SD

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 35. Light west wind.

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 67. Calm wind becoming southwest around 5 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 67 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. West wind 5 to 9 mph, with gusts as high as 25 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Showers likely after noon.  Increasing clouds, with a high near 68. Southwest wind 6 to 10 mph, with gusts as high as 29 mph.  Chance of precipitation is 60%.

    High: 68 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Rain showers before 10pm, then snow showers.  Low around 28. North wind 6 to 9 mph, with gusts as high as 24 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow
    then Snow
    Showers
    Likely

  • Friday

    Friday: Snow showers likely.  Mostly cloudy, with a high near 37. North wind around 8 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Showers
    Likely

  • Friday Night

    Friday Night: A 20 percent chance of snow showers before midnight.  Partly cloudy, with a low around 25. North wind 6 to 8 mph, with gusts as high as 23 mph.

    Low: 25 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

  • Saturday

    Saturday: A chance of snow showers, mainly after noon.  Mostly sunny, with a high near 45. Northwest wind 6 to 10 mph, with gusts as high as 26 mph.

    High: 45 °F

    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 35. Light west wind.
Wednesday
Sunny, with a high near 67. Calm wind becoming southwest around 5 mph in the afternoon. Winds could gust as high as 17 mph.
Wednesday Night
Mostly clear, with a low around 50. West wind 5 to 9 mph, with gusts as high as 25 mph.
Thursday
Showers likely after noon. Increasing clouds, with a high near 68. Southwest wind 6 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Thursday Night
Rain showers before 10pm, then snow showers. Low around 28. North wind 6 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Snow showers likely. Mostly cloudy, with a high near 37. North wind around 8 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday Night
A 20 percent chance of snow showers before midnight. Partly cloudy, with a low around 25. North wind 6 to 8 mph, with gusts as high as 23 mph.
Saturday
A chance of snow showers, mainly after noon. Mostly sunny, with a high near 45. Northwest wind 6 to 10 mph, with gusts as high as 26 mph.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
2:02 am MDT Apr 15, 2026
3am MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database