Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Overcast

50°F

10°C

Humidity 43%
Wind Speed W 6 mph
Barometer 29.82 in (1005.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 13 Apr 7:53 am MDT
Extended Forecast for

5 Miles E Custer County Airport SD

Red Flag Warning April 13, 08:01am until April 13, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning April 13, 08:01am until April 13, 09:00pm

    NOW until 9:00pm Mon

    Red Flag Warning

  • Today

    High: 62 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 38. West wind 13 to 18 mph decreasing to 6 to 11 mph in the evening. Winds could gust as high as 32 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after noon.  Partly sunny, with a high near 58. West wind 5 to 7 mph becoming south in the afternoon. Winds could gust as high as 18 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 37. Southwest wind around 6 mph becoming north in the evening. Winds could gust as high as 16 mph.

    Low: 37 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after noon.  Sunny, with a high near 64. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    High: 64 °F

    Sunny then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. West wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers after noon.  Mostly sunny, with a high near 67. Southwest wind 11 to 18 mph, with gusts as high as 37 mph.

    High: 67 °F

    Mostly Sunny
    then 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.  Mostly cloudy, with a low around 28. Southwest wind around 16 mph becoming north in the evening. Winds could gust as high as 30 mph.

    Low: 28 °F

    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 62. Breezy, with a west wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 40 mph.
Tonight
Partly cloudy, with a low around 38. West wind 13 to 18 mph decreasing to 6 to 11 mph in the evening. Winds could gust as high as 32 mph.
Tuesday
A 30 percent chance of showers after noon. Partly sunny, with a high near 58. West wind 5 to 7 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Southwest wind around 6 mph becoming north in the evening. Winds could gust as high as 16 mph.
Wednesday
A 20 percent chance of showers after noon. Sunny, with a high near 64. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 45. West wind 7 to 10 mph, with gusts as high as 23 mph.
Thursday
A 40 percent chance of showers after noon. Mostly sunny, with a high near 67. Southwest wind 11 to 18 mph, with gusts as high as 37 mph.
Thursday Night
Rain showers before 9pm, then rain and snow showers between 9pm and 3am, then snow showers likely after 3am. Mostly cloudy, with a low around 28. Southwest wind around 16 mph becoming north in the evening. Winds could gust as high as 30 mph.
Friday
Snow showers likely. Mostly cloudy, with a high near 38.
Friday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 22.
Saturday
A slight chance of snow showers. Mostly sunny, with a high near 45.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Custer County Airport SD
 43.72°N 103.54°W (Elev. 5351 ft)
7:26 am MDT Apr 13, 2026
8am MDT Apr 13, 2026-6pm MDT Apr 19, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database