National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Fire Weather Issues; Pacific System Moving Inland

Dry fuels, strong winds and dry weather will continue to bring elevated to critical fire weather conditions to the areas of the Plains, Midwest and Southeast today. A Pacific storm system will bring low elevation rain and heavy high elevation mountain snow to California through early week, expanding into the Pacific Northwest, Great Basin, and southern California on Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Rosebud Sioux Tribal Airport (KSUO)

Lat: 43.26°NLon: 100.86°WElev: 2724ft.

Fair

79°F

26°C

Humidity 16%
Wind Speed N 13 mph
Barometer 29.77 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 20 Apr 5:55 pm CDT
Extended Forecast for

Long Valley SD

Red Flag Warning until April 20, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning until April 20, 08:00pm

    NOW until 8:00pm Mon

    Red Flag Warning

  • This Afternoon

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 44. North wind 6 to 14 mph becoming south in the evening. Winds could gust as high as 22 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Southwest wind 6 to 15 mph becoming southeast in the morning. Winds could gust as high as 23 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56. Breezy, with a south wind 11 to 21 mph, with gusts as high as 28 mph.

    Low: 56 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Breezy

  • Wednesday

    Wednesday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Windy, with a south wind 22 to 31 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms and
    Windy

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 51. Breezy, with a south wind 23 to 26 mph becoming west after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 60%.

    Low: 51 °F

    Breezy.
    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers after noon. Increasing clouds, with a high near 66. Very windy, with a west wind 26 to 31 mph increasing to 36 to 41 mph in the afternoon. Winds could gust as high as 55 mph.

    High: 66 °F

    Mostly Sunny
    and Windy
    then Chance
    Showers and
    Very Windy

  • Thursday Night

    Thursday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 34. Windy, with a northwest wind 33 to 38 mph decreasing to 24 to 29 mph after midnight. Winds could gust as high as 48 mph.

    Low: 34 °F

    Slight Chance
    Showers and
    Windy

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 80. Northwest wind around 15 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 44. North wind 6 to 14 mph becoming south in the evening. Winds could gust as high as 22 mph.
Tuesday
Sunny, with a high near 88. Southwest wind 6 to 15 mph becoming southeast in the morning. Winds could gust as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 56. Breezy, with a south wind 11 to 21 mph, with gusts as high as 28 mph.
Wednesday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Windy, with a south wind 22 to 31 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.
Wednesday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 51. Breezy, with a south wind 23 to 26 mph becoming west after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 60%.
Thursday
A 40 percent chance of showers after noon. Increasing clouds, with a high near 66. Very windy, with a west wind 26 to 31 mph increasing to 36 to 41 mph in the afternoon. Winds could gust as high as 55 mph.
Thursday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 34. Windy, with a northwest wind 33 to 38 mph decreasing to 24 to 29 mph after midnight. Winds could gust as high as 48 mph.
Friday
A slight chance of showers after noon. Partly sunny, with a high near 54. Breezy.
Friday Night
A slight chance of rain showers before 9pm, then a slight chance of rain and snow showers between 9pm and midnight, then a chance of snow showers after midnight. Partly cloudy, with a low around 29. Blustery.
Saturday
A slight chance of rain and snow showers. Partly sunny, with a high near 53.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 29.
Sunday
A chance of rain and snow showers. Partly sunny, with a high near 53.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 32.
Monday
A slight chance of rain and snow showers. Partly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Valley SD
 43.45°N 101.49°W (Elev. 2700 ft)
Last Update:
2:53 pm MDT Apr 20, 2026
Forecast Valid:
5pm MDT Apr 20, 2026-6pm MDT Apr 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation