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

Lamoni, Lamoni Municipal Airport (KLWD)

Lat: 40.63°NLon: 93.9°WElev: 1129ft.

Fair

71°F

22°C

Humidity 94%
Wind Speed Calm
Barometer 29.94 in (1013.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 Aug 7:53 am CDT
Extended Forecast for

4 Miles SSW Decatur IA

  • Today

    Today: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm.  Partly sunny, with a high near 81. Calm wind becoming east northeast around 6 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers before 7pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. Light south wind.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Southwest wind 3 to 7 mph.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 66. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Saturday Night

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

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 81. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 30 percent chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Sunny, with a high near 83. Light and variable wind.
Thursday Night
Mostly clear, with a low around 66. Light south wind.
Friday
Sunny, with a high near 87. Southwest wind 3 to 7 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Partly sunny, with a high near 81.
Sunday Night
Mostly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Decatur IA
 40.71°N 93.87°W
6:51 am CDT Aug 19, 2026
8am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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