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

Pierre, Pierre Regional Airport (KPIR)

Lat: 44.38°NLon: 100.29°WElev: 1742ft.

Fair

70°F

21°C

Humidity 90%
Wind Speed SE 6 mph
Barometer 29.87 in (1009.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 16 Aug 3:53 am CDT
Extended Forecast for

Vivian SD

  • Today

    Today: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 3pm. Some of the storms could be severe. Partly sunny and hot, with a high near 92. East wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 92 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 69. East wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 92. East wind 9 to 11 mph becoming west in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. North northeast wind 6 to 11 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 92. East wind 7 to 10 mph.

    High: 92 °F

    Hot

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. East wind 7 to 11 mph. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Sunny and hot, with a high near 90. East wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Southeast wind 9 to 11 mph.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 93. Southeast wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 93 °F

    Hot

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 3pm. Some of the storms could be severe. Partly sunny and hot, with a high near 92. East wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 69. East wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 92. East wind 9 to 11 mph becoming west in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 65. North northeast wind 6 to 11 mph.
Monday
Sunny and hot, with a high near 92. East wind 7 to 10 mph.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. East wind 7 to 11 mph. Chance of precipitation is 20%.
Tuesday
Sunny and hot, with a high near 90. East wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 63. Southeast wind 9 to 11 mph.
Wednesday
Sunny and hot, with a high near 93. Southeast wind 8 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vivian SD
 43.92°N 100.26°W (Elev. 1916 ft)
Last Update:
4:30 am CDT Aug 16, 2025
Forecast Valid:
4am 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