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

Custer, Custer County Airport (KCUT)

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

Fair

43°F

6°C

Humidity 51%
Wind Speed NW 5 mph
Barometer 29.85 in (1007.2 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 13 Apr 9:53 pm MDT
Extended Forecast for

4 Miles WSW Mount Rushmore SD

  • Tonight

    Tonight: Partly cloudy, with a low around 38. West wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 2pm.  Partly sunny, with a high near 55. West wind around 6 mph becoming calm. Winds could gust as high as 18 mph.

    High: 55 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of rain showers before 11pm, then a slight chance of snow showers between 11pm and midnight.  Partly cloudy, with a low around 36. West wind 5 to 8 mph, with gusts as high as 17 mph.  Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain/Snow
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 62. Southwest wind around 8 mph, with gusts as high as 22 mph.

    High: 62 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. Southwest wind 7 to 13 mph, with gusts as high as 28 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers after noon.  Mostly sunny, with a high near 65. West wind 10 to 15 mph, with gusts as high as 34 mph.

    High: 65 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 9pm, then rain and snow showers between 9pm and 3am, then snow showers likely after 3am.  Low around 27. West wind 13 to 17 mph becoming north in the evening. Winds could gust as high as 32 mph.  Chance of precipitation is 80%.

    Low: 27 °F

    Rain/Snow

  • Friday

    Friday: Snow showers.  Mostly cloudy, with a high near 35. Northwest wind 15 to 18 mph, with gusts as high as 36 mph.

    High: 35 °F

    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers before midnight.  Mostly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. West wind 6 to 8 mph, with gusts as high as 18 mph.
Tuesday
A 30 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 55. West wind around 6 mph becoming calm. Winds could gust as high as 18 mph.
Tuesday Night
A slight chance of rain showers before 11pm, then a slight chance of snow showers between 11pm and midnight. Partly cloudy, with a low around 36. West wind 5 to 8 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 62. Southwest wind around 8 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 45. Southwest wind 7 to 13 mph, with gusts as high as 28 mph.
Thursday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 65. West wind 10 to 15 mph, with gusts as high as 34 mph.
Thursday Night
Rain showers before 9pm, then rain and snow showers between 9pm and 3am, then snow showers likely after 3am. Low around 27. West wind 13 to 17 mph becoming north in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Friday
Snow showers. Mostly cloudy, with a high near 35. Northwest wind 15 to 18 mph, with gusts as high as 36 mph.
Friday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 21.
Saturday
A chance of snow showers after noon. Mostly sunny, with a high near 42.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Mount Rushmore SD
 43.85°N 103.52°W (Elev. 6109 ft)
7:53 pm MDT Apr 13, 2026
10pm MDT Apr 13, 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