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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Ellsworth Air Force Base (KRCA)

Lat: 44.15°NLon: 103.1°WElev: 3278ft.

Mostly Cloudy

75°F

24°C

Humidity 24%
Wind Speed SW 7 mph
Barometer 29.58 in (999.2 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 10 Oct 9:55 am MDT
Extended Forecast for

Box Elder SD

  • Today

    Today: Sunny, with a high near 89. Southwest wind 7 to 11 mph, with gusts as high as 25 mph.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50. South wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

    Low: 50 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 62. North wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 62 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of rain, mainly after midnight. Cloudy, with a low around 43. Northeast wind 7 to 11 mph, with gusts as high as 23 mph.

    Low: 43 °F

    Slight Chance
    Rain then
    Chance Rain

  • Columbus Day

    Columbus Day: Cloudy, then gradually becoming mostly sunny, with a high near 60. East wind 7 to 11 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 60 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 39. North wind 6 to 13 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A chance of rain before noon, then a slight chance of showers after noon. Partly sunny, with a high near 58. Chance of precipitation is 30%.

    High: 58 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain, mainly after midnight. Partly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely. Mostly cloudy, with a high near 58.

    High: 58 °F

    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 89. Southwest wind 7 to 11 mph, with gusts as high as 25 mph.
Tonight
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50. South wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 21 mph.
Sunday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 62. North wind 11 to 15 mph, with gusts as high as 24 mph.
Sunday Night
A 50 percent chance of rain, mainly after midnight. Cloudy, with a low around 43. Northeast wind 7 to 11 mph, with gusts as high as 23 mph.
Columbus Day
Cloudy, then gradually becoming mostly sunny, with a high near 60. East wind 7 to 11 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Monday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 39. North wind 6 to 13 mph, with gusts as high as 25 mph.
Tuesday
A chance of rain before noon, then a slight chance of showers after noon. Partly sunny, with a high near 58. Chance of precipitation is 30%.
Tuesday Night
A chance of rain, mainly after midnight. Partly cloudy, with a low around 42.
Wednesday
Rain likely. Mostly cloudy, with a high near 58.
Wednesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 43.
Thursday
A chance of rain. Mostly sunny, with a high near 59. Windy.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 38. Breezy.
Friday
Sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Box Elder SD
 44.13°N 103.06°W (Elev. 3091 ft)
Last Update:
10:31 am MDT Oct 10, 2026
Forecast Valid:
10am MDT Oct 10, 2026-6pm MDT Oct 16, 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