Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

40°F

4°C

Humidity 77%
Wind Speed S 5 mph
Barometer 30.00 in (1014.6 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 10 Apr 11:53 pm MDT
Extended Forecast for

6 Miles NNW Keystone SD

Red Flag Warning April 11, 12:00pm until April 11, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  • Overnight

    Overnight: Mostly cloudy, with a low around 43. Southwest wind 6 to 8 mph, with gusts as high as 24 mph.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 6 to 10 mph, with gusts as high as 28 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 46. Southwest wind around 7 mph, with gusts as high as 26 mph.

    Low: 46 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 71. West wind 5 to 7 mph, with gusts as high as 23 mph.

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before midnight.  Partly cloudy, with a low around 42. Light and variable wind. Winds could gust as high as 16 mph.

    Low: 42 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers after noon.  Sunny, with a high near 69. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 33 mph.

    High: 69 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 41. West wind 5 to 8 mph becoming calm  in the evening. Winds could gust as high as 25 mph.

    Low: 41 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 59. Northwest wind 3 to 7 mph. Winds could gust as high as 22 mph.

    High: 59 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers before midnight.  Partly cloudy, with a low around 37.

    Low: 37 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 43. Southwest wind 6 to 8 mph, with gusts as high as 24 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 6 to 10 mph, with gusts as high as 28 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 46. Southwest wind around 7 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 71. West wind 5 to 7 mph, with gusts as high as 23 mph.
Sunday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 42. Light and variable wind. Winds could gust as high as 16 mph.
Monday
A 30 percent chance of showers after noon. Sunny, with a high near 69. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 33 mph.
Monday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 41. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 25 mph.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. Northwest wind 3 to 7 mph. Winds could gust as high as 22 mph.
Tuesday Night
A chance of showers before midnight. Partly cloudy, with a low around 37.
Wednesday
A slight chance of showers after noon. Mostly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
A chance of showers. Mostly sunny, with a high near 65.
Thursday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 27.
Friday
A chance of snow showers. Partly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Keystone SD
 43.98°N 103.47°W (Elev. 4800 ft)
10:32 pm MDT Apr 10, 2026
12am MDT Apr 11, 2026-6pm MDT Apr 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database