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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Overcast

69°F

21°C

Humidity 93%
Wind Speed SE 8 G 26 mph
Barometer 29.96 in (1013.4 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 17 Aug 7:53 am CDT
Extended Forecast for

5 Miles E Florence SD

  • Today

    Today: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. East southeast wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 66. East wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Northwest wind 6 to 9 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. Northeast wind 5 to 8 mph.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. East northeast wind around 6 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. East northeast wind around 6 mph becoming light and variable after midnight.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. South southeast wind 3 to 8 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. Southeast wind around 9 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. South wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 83 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. East southeast wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 66. East wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Northwest wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 61. Northeast wind 5 to 8 mph.
Tuesday
Mostly sunny, with a high near 79. East northeast wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 61. East northeast wind around 6 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 80. South southeast wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 61. Southeast wind around 9 mph.
Thursday
Sunny, with a high near 83. South wind 10 to 13 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Florence SD
 45.06°N 97.24°W (Elev. 1801 ft)
Last Update:
7:46 am CDT Aug 17, 2025
Forecast Valid:
8am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation