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

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

54°F

12°C

Humidity 69%
Wind Speed N 15 mph
Barometer 29.83 in (1009.8 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 11 Oct 1:52 pm MDT
Extended Forecast for

New Underwood SD

  • This Afternoon

    This Afternoon: Mostly cloudy, with a steady temperature around 57. North wind around 10 mph, with gusts as high as 21 mph.

    High: 57 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of showers between 8pm and 2am.  Mostly cloudy, with a low around 46. Northeast wind 7 to 10 mph becoming southeast after midnight. Winds could gust as high as 18 mph.  Chance of precipitation is 40%.

    Low: 46 °F

    Chance
    Showers

  • Columbus Day

    Columbus Day: Cloudy through mid morning, then gradual clearing, with a high near 63. Breezy, with a southeast wind 7 to 12 mph becoming north 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 63 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Rain likely after midnight.  Increasing clouds, with a low around 39. Breezy, with a north wind 18 to 23 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 37 mph.  Chance of precipitation is 60%.

    Low: 39 °F

    Partly Cloudy
    and Breezy
    then Rain
    Likely

  • Tuesday

    Tuesday: A 50 percent chance of rain before noon.  Mostly cloudy, with a high near 54. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.

    High: 54 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight.  Mostly cloudy, with a low around 39. North wind 3 to 7 mph.

    Low: 39 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain, mainly after noon.  Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain.  Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

  • Thursday

    Thursday: A slight chance of rain before noon.  Partly sunny, with a high near 61. Windy.

    High: 61 °F

    Slight Chance
    Rain and
    Breezy then
    Mostly Sunny
    and Windy

Detailed Forecast

This Afternoon
Mostly cloudy, with a steady temperature around 57. North wind around 10 mph, with gusts as high as 21 mph.
Tonight
A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 46. Northeast wind 7 to 10 mph becoming southeast after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Columbus Day
Cloudy through mid morning, then gradual clearing, with a high near 63. Breezy, with a southeast wind 7 to 12 mph becoming north 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph.
Monday Night
Rain likely after midnight. Increasing clouds, with a low around 39. Breezy, with a north wind 18 to 23 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 60%.
Tuesday
A 50 percent chance of rain before noon. Mostly cloudy, with a high near 54. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.
Tuesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 39. North wind 3 to 7 mph.
Wednesday
A 40 percent chance of rain, mainly after noon. Partly sunny, with a high near 57.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 41.
Thursday
A slight chance of rain before noon. Partly sunny, with a high near 61. Windy.
Thursday Night
Mostly clear, with a low around 34. Windy.
Friday
Sunny, with a high near 58.
Friday Night
Clear, with a low around 36.
Saturday
Sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
New Underwood SD
 44.09°N 102.85°W (Elev. 2887 ft)
12:51 pm MDT Oct 11, 2026
2pm MDT Oct 11, 2026-6pm MDT Oct 17, 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