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.

Partly Cloudy and Breezy

60°F

16°C

Humidity 20%
Wind Speed SW 21 G 43 mph
Barometer 29.77 in (1003.7 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 13 Apr 12:53 pm MDT
Extended Forecast for

6 Miles W Hill City SD

Red Flag Warning April 13, 01:33pm until April 13, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning April 13, 01:33pm until April 13, 09:00pm

    NOW until 9:00pm Mon

    Red Flag Warning

  • This Afternoon

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. West wind 6 to 14 mph, with gusts as high as 36 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 2pm.  Partly sunny, with a high near 52. Southwest wind around 6 mph, with gusts as high as 18 mph.

    High: 52 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and 9pm.  Partly cloudy, with a low around 32. West wind 5 to 7 mph, with gusts as high as 17 mph.  Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 57. Southwest wind 6 to 8 mph, with gusts as high as 22 mph.

    High: 57 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43. Southwest wind 8 to 14 mph, with gusts as high as 26 mph.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers after noon.  Mostly sunny, with a high near 60. West wind 11 to 15 mph, with gusts as high as 34 mph.

    High: 60 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 9pm, then rain and snow showers between 9pm and midnight, then snow showers after midnight.  Mostly cloudy, with a low around 22. Southwest wind 11 to 16 mph becoming north after midnight. Winds could gust as high as 34 mph.

    Low: 22 °F

    Rain/Snow
    then Snow
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 55. West wind 11 to 16 mph, with gusts as high as 39 mph.
Tonight
Partly cloudy, with a low around 34. West wind 6 to 14 mph, with gusts as high as 36 mph.
Tuesday
A 30 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 52. Southwest wind around 6 mph, with gusts as high as 18 mph.
Tuesday Night
A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and 9pm. Partly cloudy, with a low around 32. West wind 5 to 7 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 57. Southwest wind 6 to 8 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 43. Southwest wind 8 to 14 mph, with gusts as high as 26 mph.
Thursday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 60. West wind 11 to 15 mph, with gusts as high as 34 mph.
Thursday Night
Rain showers before 9pm, then rain and snow showers between 9pm and midnight, then snow showers after midnight. Mostly cloudy, with a low around 22. Southwest wind 11 to 16 mph becoming north after midnight. Winds could gust as high as 34 mph.
Friday
Snow showers. Mostly cloudy, with a high near 30.
Friday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 17.
Saturday
A chance of snow showers. Mostly sunny, with a high near 38.
Saturday Night
Mostly clear, with a low around 21.
Sunday
Sunny, with a high near 54.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles W Hill City SD
 43.95°N 103.71°W (Elev. 6598 ft)
12:32 pm MDT Apr 13, 2026
1pm 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