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

Ortonville, Ortonville Muncipal-Martinson Field Airport (KVVV)

Lat: 45.31°NLon: 96.42°WElev: 1099ft.

Partly Cloudy

82°F

28°C

Humidity 74%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 16 Aug 4:35 pm CDT
Extended Forecast for

Marvin SD

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 81. East northeast wind around 10 mph.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 67. East wind 10 to 14 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 3pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 78. East southeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    T-storms
    Likely and
    Patchy Fog

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 66. East southeast wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 76. North northwest wind around 10 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. North northeast wind 6 to 8 mph.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. East northeast wind around 6 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Southeast wind around 7 mph.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 81. East northeast wind around 10 mph.
Tonight
A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 67. East wind 10 to 14 mph. Chance of precipitation is 40%.
Sunday
Showers and thunderstorms likely, mainly before 3pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 78. East southeast wind around 14 mph, with gusts as high as 24 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, then a slight chance of showers. Mostly cloudy, with a low around 66. East southeast wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 76. North northwest wind around 10 mph.
Monday Night
Partly cloudy, with a low around 60. North northeast wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 77. East northeast wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 61. East northeast wind around 6 mph becoming south after midnight.
Wednesday
Sunny, with a high near 79. Southeast wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 82.
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 and thunderstorms. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marvin SD
 45.25°N 96.91°W (Elev. 1650 ft)
Last Update:
4:32 pm CDT Aug 16, 2025
Forecast Valid:
4pm 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