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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

72°F

22°C

Humidity 87%
Wind Speed NW 7 mph
Barometer 29.95 in (1012.6 mb)
Dewpoint 68°F (20°C)
Visibility NA
Last update 16 Aug 11:56 am CDT
Extended Forecast for

Ortley SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Southwest wind around 11 mph becoming east.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly between 3am and 4am. Mostly cloudy, with a low around 65. East wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 3pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 77. East southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63. East southeast wind 8 to 11 mph becoming north northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 77. North northwest wind 8 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. Northeast wind 5 to 9 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. East northeast wind 5 to 8 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. East northeast wind 5 to 7 mph becoming southeast after midnight.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. South southeast wind 5 to 9 mph.

    High: 78 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Southwest wind around 11 mph becoming east.
Tonight
A chance of showers and thunderstorms, mainly between 3am and 4am. Mostly cloudy, with a low around 65. East wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Sunday
Showers and thunderstorms likely, mainly before 3pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 77. East southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63. East southeast wind 8 to 11 mph becoming north northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 77. North northwest wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 62. Northeast wind 5 to 9 mph.
Tuesday
Mostly sunny, with a high near 77. East northeast wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 60. East northeast wind 5 to 7 mph becoming southeast after midnight.
Wednesday
Sunny, with a high near 78. South southeast wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 76. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ortley SD
 45.33°N 97.21°W (Elev. 1847 ft)
Last Update:
12:46 pm CDT Aug 16, 2025
Forecast Valid:
12pm CDT Aug 16, 2025-6pm CDT Aug 22, 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