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

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

61°F

16°C

Humidity 75%
Wind Speed N 15 mph
Barometer 29.73 in (1006.5 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 11 Oct 5:53 pm CDT
Extended Forecast for

Castlewood SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. North northeast wind 8 to 11 mph.

    Low: 51 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: A chance of sprinkles with a slight chance of showers before 1pm, then a chance of sprinkles after 5pm.  Partly sunny, with a high near 72. Northeast wind 9 to 11 mph.  Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59. North northwest wind around 9 mph.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. North wind 5 to 7 mph.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 61. Light north wind increasing to 5 to 9 mph in the morning.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 1am.  Mostly clear, with a low around 41. East northeast wind 3 to 7 mph.  Chance of precipitation is 30%.

    Low: 41 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, mainly before 1pm.  Mostly cloudy, with a high near 60. East southeast wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.  Chance of precipitation is 40%.

    High: 60 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 33 mph.

    Low: 38 °F

    Partly Cloudy
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 51. North northeast wind 8 to 11 mph.
Columbus Day
A chance of sprinkles with a slight chance of showers before 1pm, then a chance of sprinkles after 5pm. Partly sunny, with a high near 72. Northeast wind 9 to 11 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 44. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 59. North northwest wind around 9 mph.
Tuesday Night
Partly cloudy, with a low around 39. North wind 5 to 7 mph.
Wednesday
Sunny, with a high near 61. Light north wind increasing to 5 to 9 mph in the morning.
Wednesday Night
A chance of showers, mainly after 1am. Mostly clear, with a low around 41. East northeast wind 3 to 7 mph. Chance of precipitation is 30%.
Thursday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 60. East southeast wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 38. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 33 mph.
Friday
Mostly sunny, with a high near 52. Breezy.
Friday Night
Widespread frost. Otherwise, mostly clear, with a low around 31.
Saturday
Widespread frost. Otherwise, sunny, with a high near 59. Breezy.
Saturday Night
Mostly clear, with a low around 41. Breezy.
Sunday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.72°N 97.02°W (Elev. 1683 ft)
5:36 pm CDT Oct 11, 2026
6pm CDT Oct 11, 2026-6pm CDT Oct 18, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database