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

Severe Weather and Heavy Rainfall in the Ohio Valley; Heat Continuing in the South and Southeast

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians tonight. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Union MO

Extreme Heat Warning August 11, 08:35pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 11, 08:35pm until August 12, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Tonight

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Isolated showers and thunderstorms between 9am and 2pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 110. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 98 °F

    Isolated
    T-storms

  • Wednesday Night

    Wednesday Night: Isolated showers and thunderstorms before 11pm. Mostly clear, with a low around 75. Light and variable wind. Chance of precipitation is 20%.

    Low: 75 °F

    Isolated
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Light and variable wind.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 77. Light southwest wind.
Wednesday
Isolated showers and thunderstorms between 9am and 2pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 110. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday Night
Isolated showers and thunderstorms before 11pm. Mostly clear, with a low around 75. Light and variable wind. Chance of precipitation is 20%.
Thursday
Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Light and variable wind.
Thursday Night
Partly cloudy, with a low around 74. Calm wind.
Friday
Mostly sunny, with a high near 96.
Friday Night
Partly cloudy, with a low around 74.
Saturday
Sunny and hot, with a high near 99.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union MO
 38.44°N 91.01°W (Elev. 554 ft)
Last Update:
8:31 pm CDT Aug 11, 2026
Forecast Valid:
8pm CDT Aug 11, 2026-6pm CDT Aug 18, 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