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

Heavy to Excessive Rainfall for the Southwest U.S.; Watching for Possible East Coast Storm

Thunderstorms and a chance for some isolated flash flooding will continue today in the Southwest U.S. before an influx of tropical moisture from Priscilla brings widespread heavy rainfall and a flash flooding threat late this week into this weekend. A coastal storm may develop off the southeast U.S. coast Friday night and drift north just off the Mid-Atlantic coast through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

66°F

19°C

Humidity 40%
Wind Speed S 16 G 25 mph
Barometer 30.18 in (1022.7 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 8 Oct 5:53 pm CDT
Extended Forecast for

Castlewood SD

  • Tonight

    Tonight: Mostly clear, with a low around 52. South southeast wind 10 to 15 mph, with gusts as high as 28 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Breezy, with a south wind 15 to 20 mph, with gusts as high as 32 mph.

    High: 76 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. Southwest wind around 8 mph becoming north northwest after midnight.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 66. North wind 7 to 10 mph.

    High: 66 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. Northeast wind 6 to 8 mph becoming east southeast after midnight.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68. Southeast wind 10 to 17 mph, with gusts as high as 29 mph.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 52. Southeast wind 16 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Mostly sunny, with a high near 76. Breezy, with a south southeast wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43. West southwest wind 10 to 16 mph becoming northwest after midnight.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 52. South southeast wind 10 to 15 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 76. Breezy, with a south wind 15 to 20 mph, with gusts as high as 32 mph.
Thursday Night
Mostly clear, with a low around 47. Southwest wind around 8 mph becoming north northwest after midnight.
Friday
Sunny, with a high near 66. North wind 7 to 10 mph.
Friday Night
Partly cloudy, with a low around 41. Northeast wind 6 to 8 mph becoming east southeast after midnight.
Saturday
Mostly sunny, with a high near 68. Southeast wind 10 to 17 mph, with gusts as high as 29 mph.
Saturday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 52. Southeast wind 16 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Sunday
A chance of showers. Mostly sunny, with a high near 76. Breezy, with a south southeast wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 43. West southwest wind 10 to 16 mph becoming northwest after midnight.
Columbus Day
Sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
A slight chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 20%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 68. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.74°N 97.05°W (Elev. 1680 ft)
Last Update:
6:36 pm CDT Oct 8, 2025
Forecast Valid:
6pm CDT Oct 8, 2025-6pm CDT Oct 15, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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