Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Partly Cloudy

64°F

18°C

Humidity 18%
Wind Speed Vrbl 6 G 23 mph
Barometer 29.73 in (1002.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 12 Apr 4:53 pm MDT
Extended Forecast for

6 Miles NNW Keystone SD

Red Flag Warning April 12, 05:33pm until April 13, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning April 12, 05:33pm until April 13, 09:00pm

    NOW until 9:00pm Mon

    Red Flag Warning

  • Tonight

    Low: 43 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 67. Light southwest wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 31 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. West wind 8 to 13 mph becoming light  in the evening. Winds could gust as high as 26 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon.  Partly sunny, with a high near 62. Calm wind becoming east around 5 mph.

    High: 62 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. Calm wind becoming southwest 5 to 7 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44. Southwest wind 5 to 8 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers after noon.  Mostly sunny, with a high near 68. Southwest wind 8 to 10 mph, with gusts as high as 31 mph.

    High: 68 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 43. Light and variable wind. Winds could gust as high as 15 mph.
Monday
Sunny, with a high near 67. Light southwest wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 31 mph.
Monday Night
Partly cloudy, with a low around 36. West wind 8 to 13 mph becoming light in the evening. Winds could gust as high as 26 mph.
Tuesday
A 20 percent chance of showers after noon. Partly sunny, with a high near 62. Calm wind becoming east around 5 mph.
Tuesday Night
Partly cloudy, with a low around 37. Calm wind.
Wednesday
Mostly sunny, with a high near 67. Calm wind becoming southwest 5 to 7 mph in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 44. Southwest wind 5 to 8 mph, with gusts as high as 22 mph.
Thursday
A chance of showers after noon. Mostly sunny, with a high near 68. Southwest wind 8 to 10 mph, with gusts as high as 31 mph.
Thursday Night
Rain showers likely before 9pm, then rain and snow showers likely between 9pm and midnight, then a chance of snow showers after midnight. Mostly cloudy, with a low around 26.
Friday
Snow showers likely. Mostly cloudy, with a high near 39.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 20.
Saturday
A chance of snow showers. Mostly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Sunny, with a high near 58.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Keystone SD
 43.98°N 103.47°W (Elev. 4800 ft)
3:02 pm MDT Apr 12, 2026
5pm MDT Apr 12, 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