Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Overcast

73°F

23°C

Humidity 94%
Wind Speed S 5 mph
Barometer 29.91 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 11:15 pm CDT
Extended Forecast for

5 Miles WNW Albia IA

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 67. Light and variable wind.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.  Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A slight chance of thunderstorms before 7pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Calm wind.  Chance of precipitation is 10%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82. Calm wind.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 66. Light south southeast wind.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear
    then Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 67. Light and variable wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 9am. Otherwise, partly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A slight chance of thunderstorms before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Calm wind. Chance of precipitation is 10%.
Thursday
Sunny, with a high near 82. Calm wind.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66. Light south southeast wind.
Friday
Sunny, with a high near 85.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Mostly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Albia IA
 41.05°N 92.88°W
11:06 pm CDT Aug 18, 2026
11pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

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