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.

Fair

60°F

16°C

Humidity 18%
Wind Speed SW 18 G 39 mph
Barometer 29.77 in (1004.3 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 13 Apr 1:53 pm MDT
Extended Forecast for

5 Miles WSW Hill City SD

Red Flag Warning April 13, 02:37pm until April 13, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning April 13, 02:37pm until April 13, 09:00pm

    NOW until 9:00pm Mon

    Red Flag Warning

  • This Afternoon

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 36. West wind 6 to 11 mph becoming light  after midnight. Winds could gust as high as 34 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 2pm.  Partly sunny, with a high near 55. Calm wind becoming south around 5 mph. Winds could gust as high as 16 mph.

    High: 55 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 9pm.  Partly cloudy, with a low around 34. Light west wind. Winds could gust as high as 15 mph.

    Low: 34 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61. Southwest wind 3 to 7 mph. Winds could gust as high as 21 mph.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. Southwest wind 5 to 9 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers after noon.  Mostly sunny, with a high near 63. West wind 9 to 11 mph, with gusts as high as 33 mph.

    High: 63 °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 after 3am.  Mostly cloudy, with a low around 25. Southwest wind 9 to 14 mph becoming north after midnight. Winds could gust as high as 33 mph.

    Low: 25 °F

    Rain/Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 57. West wind 9 to 14 mph, with gusts as high as 39 mph.
Tonight
Partly cloudy, with a low around 36. West wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 34 mph.
Tuesday
A 30 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 55. Calm wind becoming south around 5 mph. Winds could gust as high as 16 mph.
Tuesday Night
A 20 percent chance of showers before 9pm. Partly cloudy, with a low around 34. Light west wind. Winds could gust as high as 15 mph.
Wednesday
Sunny, with a high near 61. Southwest wind 3 to 7 mph. Winds could gust as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 45. Southwest wind 5 to 9 mph, with gusts as high as 24 mph.
Thursday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 63. West wind 9 to 11 mph, with gusts as high as 33 mph.
Thursday Night
Rain showers before 9pm, then rain and snow showers between 9pm and 3am, then snow showers after 3am. Mostly cloudy, with a low around 25. Southwest wind 9 to 14 mph becoming north after midnight. Winds could gust as high as 33 mph.
Friday
Snow showers. Mostly cloudy, with a high near 33.
Friday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 18.
Saturday
A chance of snow showers. Mostly sunny, with a high near 41.
Saturday Night
Mostly clear, with a low around 22.
Sunday
Sunny, with a high near 57.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Hill City SD
 43.91°N 103.64°W (Elev. 6198 ft)
2:22 pm MDT Apr 13, 2026
2pm MDT Apr 13, 2026-6pm MDT Apr 19, 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