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 >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

75°F

24°C

Humidity 43%
Wind Speed S 18 G 29 mph
Barometer 29.61 in (1001.5 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 10 Oct 10:53 am CDT
Extended Forecast for

Castlewood SD

  • Today

    Today: Patchy blowing dust. Sunny, with a high near 88. Breezy, with a south wind 17 to 23 mph, with gusts as high as 33 mph.

    High: 88 °F

    Patchy
    Blowing Dust
    and Breezy

  • Tonight

    Tonight: Clear, with a low around 63. South southeast wind 10 to 13 mph, with gusts as high as 28 mph.

    Low: 63 °F

    Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 82. South southeast wind 8 to 10 mph becoming east northeast in the afternoon.

    High: 82 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52. North wind 8 to 10 mph.

    Low: 52 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: A chance of showers after 1pm. Partly sunny, with a high near 70. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 70 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 46. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Cloudy

  • Tuesday

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

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42. East northeast wind 5 to 7 mph.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, mainly after 1pm. Mostly sunny, with a high near 61. East wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy blowing dust. Sunny, with a high near 88. Breezy, with a south wind 17 to 23 mph, with gusts as high as 33 mph.
Tonight
Clear, with a low around 63. South southeast wind 10 to 13 mph, with gusts as high as 28 mph.
Sunday
Increasing clouds, with a high near 82. South southeast wind 8 to 10 mph becoming east northeast in the afternoon.
Sunday Night
Mostly cloudy, with a low around 52. North wind 8 to 10 mph.
Columbus Day
A chance of showers after 1pm. Partly sunny, with a high near 70. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 46. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 60. North northwest wind around 9 mph.
Tuesday Night
Partly cloudy, with a low around 42. East northeast wind 5 to 7 mph.
Wednesday
A chance of showers, mainly after 1pm. Mostly sunny, with a high near 61. East wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Thursday
Showers likely. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Friday
A slight chance of showers. Partly sunny, with a high near 54. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.72°N 97.02°W (Elev. 1683 ft)
Last Update:
11:21 am CDT Oct 10, 2026
Forecast Valid:
11am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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