Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Overcast

60°F

16°C

Humidity 79%
Wind Speed N 7 mph
Barometer 29.79 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 11 Oct 3:55 pm CDT
Extended Forecast for

Oacoma SD

  • This Afternoon

    This Afternoon: Mostly cloudy, with a steady temperature around 63. North wind around 15 mph, with gusts as high as 24 mph.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 50. North wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: A chance of sprinkles between 11am and 2pm.  Mostly cloudy, then gradually becoming sunny, with a high near 68. North northeast wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 68 °F

    Chance
    Sprinkles

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. North northwest wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. North wind around 9 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 43. North wind 5 to 8 mph.

    Low: 43 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 63. Light north wind becoming north northeast 5 to 9 mph in the morning.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers.  Mostly cloudy, with a low around 46. East northeast wind 5 to 7 mph.  Chance of precipitation is 50%.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 1pm.  Mostly cloudy, with a high near 62. Northeast wind 6 to 11 mph becoming northwest 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a steady temperature around 63. North wind around 15 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, with a low around 50. North wind 9 to 15 mph, with gusts as high as 23 mph.
Columbus Day
A chance of sprinkles between 11am and 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 68. North northeast wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.
Monday Night
Partly cloudy, with a low around 45. North northwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 60. North wind around 9 mph.
Tuesday Night
Partly cloudy, with a low around 43. North wind 5 to 8 mph.
Wednesday
Sunny, with a high near 63. Light north wind becoming north northeast 5 to 9 mph in the morning.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 46. East northeast wind 5 to 7 mph. Chance of precipitation is 50%.
Thursday
A chance of showers before 1pm. Mostly cloudy, with a high near 62. Northeast wind 6 to 11 mph becoming northwest 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 41. Breezy.
Friday
Sunny, with a high near 55. Breezy.
Friday Night
Areas of frost. Otherwise, mostly clear, with a low around 36.
Saturday
Areas of frost. Otherwise, sunny, with a high near 66. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Oacoma SD
 43.8°N 99.36°W (Elev. 1355 ft)
3:51 pm CDT Oct 11, 2026
4pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database