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

Heavy Rainfall Possible in the Upper Midwest, South Texas, and Puerto Rico and the Virgin Islands

Scattered thunderstorms and heavy rainfall may bring areas of flooding though the weekend over the Upper Midwest. A tropical disturbance will bring moderate to locally heavy rain to portions of South Texas into Saturday. Tropical Storm Erin may bring isolated flash and urban flooding, landslides or mudslides, and tropical storm conditions to Puerto Rico and the U.S. Virgin Islands. Read More >

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

68°F

20°C

Humidity 93%
Wind Speed Calm
Barometer 29.92 in (1011.5 mb)
Dewpoint 66°F (19°C)
Visibility NA
Last update 15 Aug 7:56 am CDT
Extended Forecast for

Waubay SD

Flood Warning August 15, 08:07am until August 15, 10:00am
Click here for hazard details and duration
...
  •  
    Flood Warning August 15, 08:07am until August 15, 10:00am

    NOW until 10:00am Fri

    Flood Warning

  • Today

    High: 80 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 65. East northeast wind 9 to 11 mph. Chance of precipitation is 50%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 76. East northeast wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 64. East northeast wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 75. East wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 75 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East northeast wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 76. East northeast wind around 9 mph.

    High: 76 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. East southeast wind 6 to 9 mph.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly before 11am. Partly sunny, with a high near 80. Light east northeast wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 65. East northeast wind 9 to 11 mph. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 76. East northeast wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Saturday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 64. East northeast wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 75. East wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East northeast wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 76. East northeast wind around 9 mph.
Monday Night
Partly cloudy, with a low around 63. East southeast wind 6 to 9 mph.
Tuesday
Mostly sunny, with a high near 79. East northeast wind 6 to 8 mph.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waubay SD
 45.33°N 97.31°W (Elev. 1811 ft)
Last Update:
8:00 am CDT Aug 15, 2025
Forecast Valid:
8am CDT Aug 15, 2025-6pm CDT Aug 21, 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