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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Current conditions at

SIARD (SIAN2)

Lat: 40.39433°NLon: 117.62567°WElev: 4600.0ft.

NA

90°F

32°C

Humidity 12%
Wind Speed WSW 9 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Heat Index86°F (30°C)
Last update 12 Aug 06:38 PM PDT
Extended Forecast for

Unionville NV

Flood Watch August 13, 01:00pm until August 13, 09:00pm
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 2am. Areas of smoke. Increasing clouds, with a low around 63. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the evening. Winds could gust as high as 30 mph.

    Low: 63 °F

    Breezy. Areas
    Smoke then
    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Areas of smoke before 11am. Mostly cloudy, with a high near 75. West wind around 10 mph becoming east in the afternoon. Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 11pm. Areas of smoke before 7pm, then areas of smoke after 3am. Cloudy during the early evening, then gradual clearing, with a low around 57. West wind 5 to 10 mph becoming southeast in the evening. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely then
    Areas Smoke

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming east after midnight. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 2am. Areas of smoke. Increasing clouds, with a low around 63. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the evening. Winds could gust as high as 30 mph.
Thursday
Showers and thunderstorms likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Areas of smoke before 11am. Mostly cloudy, with a high near 75. West wind around 10 mph becoming east in the afternoon. Chance of precipitation is 70%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 11pm. Areas of smoke before 7pm, then areas of smoke after 3am. Cloudy during the early evening, then gradual clearing, with a low around 57. West wind 5 to 10 mph becoming southeast in the evening. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming east after midnight. Chance of precipitation is 50%.
Saturday
Sunny, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Partly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Unionville NV
 40.45°N 118.13°W (Elev. 5223 ft)
Last Update:
4:30 pm PDT Aug 12, 2026
Forecast Valid:
6pm PDT Aug 12, 2026-6pm PDT Aug 19, 2026
 
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