Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Clyde A. Thomas Regional Airport (KSYM)

Lat: 38.22°NLon: 83.59°WElev: 1047ft.

Fair

75°F

24°C

Humidity 83%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 19 Aug 10:10 pm EDT
Extended Forecast for

5 Miles SW Wallingford KY

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am.  Mostly cloudy, with a steady temperature around 68. Calm wind.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 1pm, then a slight chance of showers and thunderstorms after 1pm.  Cloudy, then gradually becoming mostly sunny, with a high near 82. Light and variable wind becoming west southwest around 5 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Patchy fog between midnight and 3am.  Otherwise, partly cloudy, with a low around 67. Calm wind.  Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 8pm.  Patchy fog after midnight.  Otherwise, partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 84.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a steady temperature around 68. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. Light and variable wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms. Patchy fog between midnight and 3am. Otherwise, partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Light and variable wind.
Friday Night
A 10 percent chance of showers and thunderstorms before 8pm. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 63. Calm wind.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 60.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 84.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 63.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Wallingford KY
 38.36°N 83.66°W (Elev. 899 ft)
12:00 am EDT Aug 20, 2026
12am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database